diff --git a/.github/workflows/license.yaml b/.github/workflows/license.yaml
new file mode 100644
index 000000000000..488757cc8008
--- /dev/null
+++ b/.github/workflows/license.yaml
@@ -0,0 +1,16 @@
+name: License checker
+
+on:
+  push:
+    branches:
+    - develop
+  pull_request:
+    types: [opened, synchronize, reopened, ready_for_review]
+jobs:
+  license-header-check:
+    runs-on: ubuntu-latest
+    name: license-header-check
+    steps:
+    - uses: actions/checkout@v2
+    - name: Check License Header
+      uses: apache/skywalking-eyes/header@main
diff --git a/.licenserc.yaml b/.licenserc.yaml
new file mode 100644
index 000000000000..dfcb6df2c775
--- /dev/null
+++ b/.licenserc.yaml
@@ -0,0 +1,14 @@
+header:
+  license:
+    spdx-id: Apache-2.0
+    copyright-owner: Greptime Team
+
+  paths:
+    - "**/*.rs"
+    - "**/*.py"
+
+  comment: on-failure
+
+dependency:
+  files:
+    - Cargo.toml
diff --git a/benchmarks/Cargo.toml b/benchmarks/Cargo.toml
index 6d6cb9bd93c8..2d2819178eb8 100644
--- a/benchmarks/Cargo.toml
+++ b/benchmarks/Cargo.toml
@@ -2,6 +2,7 @@
 name = "benchmarks"
 version = "0.1.0"
 edition = "2021"
+license = "Apache-2.0"
 
 [dependencies]
 arrow = "10"
diff --git a/benchmarks/src/bin/nyc-taxi.rs b/benchmarks/src/bin/nyc-taxi.rs
index caac625ef4b4..fe434591f323 100644
--- a/benchmarks/src/bin/nyc-taxi.rs
+++ b/benchmarks/src/bin/nyc-taxi.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Use the taxi trip records from New York City dataset to bench. You can download the dataset from
 //! [here](https://www1.nyc.gov/site/tlc/about/tlc-trip-record-data.page).
 
diff --git a/src/api/Cargo.toml b/src/api/Cargo.toml
index e9e07bf5226d..035ba7d7c502 100644
--- a/src/api/Cargo.toml
+++ b/src/api/Cargo.toml
@@ -2,6 +2,7 @@
 name = "api"
 version = "0.1.0"
 edition = "2021"
+license = "Apache-2.0"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
diff --git a/src/api/build.rs b/src/api/build.rs
index 4f398f2d7192..ec88ccf40876 100644
--- a/src/api/build.rs
+++ b/src/api/build.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::path::PathBuf;
 
 fn main() {
diff --git a/src/api/src/error.rs b/src/api/src/error.rs
index 6fc0eaf14181..2320e199d70f 100644
--- a/src/api/src/error.rs
+++ b/src/api/src/error.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 
 use common_error::ext::ErrorExt;
diff --git a/src/api/src/helper.rs b/src/api/src/helper.rs
index 7958eb2c1e89..cdcf704c8dcf 100644
--- a/src/api/src/helper.rs
+++ b/src/api/src/helper.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use common_base::BitVec;
 use common_time::timestamp::TimeUnit;
 use datatypes::prelude::ConcreteDataType;
diff --git a/src/api/src/lib.rs b/src/api/src/lib.rs
index ae2c2912fb8c..d6c415d8cf9f 100644
--- a/src/api/src/lib.rs
+++ b/src/api/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod error;
 pub mod helper;
 pub mod prometheus;
diff --git a/src/api/src/prometheus.rs b/src/api/src/prometheus.rs
index 31e109b90984..1ce8940a8821 100644
--- a/src/api/src/prometheus.rs
+++ b/src/api/src/prometheus.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 #![allow(clippy::derive_partial_eq_without_eq)]
 
 pub mod remote {
diff --git a/src/api/src/result.rs b/src/api/src/result.rs
index 725ccce68c7f..ca656b09058f 100644
--- a/src/api/src/result.rs
+++ b/src/api/src/result.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use common_error::prelude::ErrorExt;
 
 use crate::v1::codec::SelectResult;
diff --git a/src/api/src/serde.rs b/src/api/src/serde.rs
index d485c7cef83e..9daf64e8e64d 100644
--- a/src/api/src/serde.rs
+++ b/src/api/src/serde.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub use prost::DecodeError;
 use prost::Message;
 
diff --git a/src/api/src/v1.rs b/src/api/src/v1.rs
index 588d28140a52..4438ce7870d5 100644
--- a/src/api/src/v1.rs
+++ b/src/api/src/v1.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 #![allow(clippy::derive_partial_eq_without_eq)]
 tonic::include_proto!("greptime.v1");
 
diff --git a/src/api/src/v1/meta.rs b/src/api/src/v1/meta.rs
index fd74246a4d7a..2959e08d684d 100644
--- a/src/api/src/v1/meta.rs
+++ b/src/api/src/v1/meta.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 tonic::include_proto!("greptime.v1.meta");
 
 use std::collections::HashMap;
diff --git a/src/catalog/Cargo.toml b/src/catalog/Cargo.toml
index ef7eeb46c8e1..aa9f38f774d9 100644
--- a/src/catalog/Cargo.toml
+++ b/src/catalog/Cargo.toml
@@ -2,6 +2,7 @@
 name = "catalog"
 version = "0.1.0"
 edition = "2021"
+license = "Apache-2.0"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
diff --git a/src/catalog/src/error.rs b/src/catalog/src/error.rs
index fb9a14284dc6..a3895973941f 100644
--- a/src/catalog/src/error.rs
+++ b/src/catalog/src/error.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 
 use common_error::ext::{BoxedError, ErrorExt};
diff --git a/src/catalog/src/lib.rs b/src/catalog/src/lib.rs
index 1ddce7d308f4..941d2c258053 100644
--- a/src/catalog/src/lib.rs
+++ b/src/catalog/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 #![feature(assert_matches)]
 
 use std::any::Any;
diff --git a/src/catalog/src/local.rs b/src/catalog/src/local.rs
index 33cda37275c3..42c24c152e93 100644
--- a/src/catalog/src/local.rs
+++ b/src/catalog/src/local.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod manager;
 pub mod memory;
 
diff --git a/src/catalog/src/local/manager.rs b/src/catalog/src/local/manager.rs
index f2f09d81aab3..89fc62b6b90e 100644
--- a/src/catalog/src/local/manager.rs
+++ b/src/catalog/src/local/manager.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 use std::sync::atomic::{AtomicU32, Ordering};
 use std::sync::Arc;
diff --git a/src/catalog/src/local/memory.rs b/src/catalog/src/local/memory.rs
index 65cd03506baf..a32b29e2040d 100644
--- a/src/catalog/src/local/memory.rs
+++ b/src/catalog/src/local/memory.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 use std::collections::hash_map::Entry;
 use std::collections::HashMap;
diff --git a/src/catalog/src/remote.rs b/src/catalog/src/remote.rs
index c2d525ff12de..36a382b736c3 100644
--- a/src/catalog/src/remote.rs
+++ b/src/catalog/src/remote.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::fmt::Debug;
 use std::pin::Pin;
 use std::sync::Arc;
diff --git a/src/catalog/src/remote/client.rs b/src/catalog/src/remote/client.rs
index b072add0bc25..ad41ef6f2ea6 100644
--- a/src/catalog/src/remote/client.rs
+++ b/src/catalog/src/remote/client.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::fmt::Debug;
 use std::sync::Arc;
 
diff --git a/src/catalog/src/remote/manager.rs b/src/catalog/src/remote/manager.rs
index 7d0ce17ec58a..5fd814ec1c73 100644
--- a/src/catalog/src/remote/manager.rs
+++ b/src/catalog/src/remote/manager.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 use std::collections::HashMap;
 use std::pin::Pin;
diff --git a/src/catalog/src/schema.rs b/src/catalog/src/schema.rs
index 739c9cc835d2..eae813d2f26e 100644
--- a/src/catalog/src/schema.rs
+++ b/src/catalog/src/schema.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 use std::sync::Arc;
 
diff --git a/src/catalog/src/system.rs b/src/catalog/src/system.rs
index 3175d9b0a7bd..887c4a8022d4 100644
--- a/src/catalog/src/system.rs
+++ b/src/catalog/src/system.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 use std::collections::HashMap;
 use std::sync::Arc;
diff --git a/src/catalog/src/tables.rs b/src/catalog/src/tables.rs
index 321d086ffdc4..3379943af65e 100644
--- a/src/catalog/src/tables.rs
+++ b/src/catalog/src/tables.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 // The `tables` table in system catalog keeps a record of all tables created by user.
 
 use std::any::Any;
diff --git a/src/catalog/tests/mock.rs b/src/catalog/tests/mock.rs
index cc9f67c7d488..067abc7ca02a 100644
--- a/src/catalog/tests/mock.rs
+++ b/src/catalog/tests/mock.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::btree_map::Entry;
 use std::collections::{BTreeMap, HashMap};
 use std::fmt::{Display, Formatter};
diff --git a/src/catalog/tests/remote_catalog_tests.rs b/src/catalog/tests/remote_catalog_tests.rs
index 0f86475d00b8..b43fd09889eb 100644
--- a/src/catalog/tests/remote_catalog_tests.rs
+++ b/src/catalog/tests/remote_catalog_tests.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 #![feature(assert_matches)]
 
 mod mock;
diff --git a/src/client/Cargo.toml b/src/client/Cargo.toml
index 6706bfd203bf..826cebe35cdc 100644
--- a/src/client/Cargo.toml
+++ b/src/client/Cargo.toml
@@ -2,6 +2,7 @@
 name = "client"
 version = "0.1.0"
 edition = "2021"
+license = "Apache-2.0"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
diff --git a/src/client/examples/insert.rs b/src/client/examples/insert.rs
index 9e813e3759c2..fa31d0c01e9a 100644
--- a/src/client/examples/insert.rs
+++ b/src/client/examples/insert.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashMap;
 
 use api::v1::codec::InsertBatch;
diff --git a/src/client/examples/logical.rs b/src/client/examples/logical.rs
index cd105ded5a8c..9e00269f2fb3 100644
--- a/src/client/examples/logical.rs
+++ b/src/client/examples/logical.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use api::v1::{ColumnDataType, ColumnDef, CreateExpr};
 use client::admin::Admin;
 use client::{Client, Database};
diff --git a/src/client/examples/physical.rs b/src/client/examples/physical.rs
index a6263487dc15..4f60fc7c43c3 100644
--- a/src/client/examples/physical.rs
+++ b/src/client/examples/physical.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use client::{Client, Database};
diff --git a/src/client/examples/select.rs b/src/client/examples/select.rs
index 160c217fc520..01516e732a8f 100644
--- a/src/client/examples/select.rs
+++ b/src/client/examples/select.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use client::{Client, Database, Select};
 use tracing::{event, Level};
 
diff --git a/src/client/src/admin.rs b/src/client/src/admin.rs
index d0784058a04d..d872dd41d2ba 100644
--- a/src/client/src/admin.rs
+++ b/src/client/src/admin.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use api::v1::*;
 use common_error::prelude::StatusCode;
 use common_query::Output;
diff --git a/src/client/src/client.rs b/src/client/src/client.rs
index a43334bb455e..5b4af8e96b2f 100644
--- a/src/client/src/client.rs
+++ b/src/client/src/client.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use api::v1::greptime_client::GreptimeClient;
diff --git a/src/client/src/database.rs b/src/client/src/database.rs
index d8c4fc913cd9..689edfe145f9 100644
--- a/src/client/src/database.rs
+++ b/src/client/src/database.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use api::v1::codec::SelectResult as GrpcSelectResult;
diff --git a/src/client/src/error.rs b/src/client/src/error.rs
index 042949f60a71..add1a0989e6b 100644
--- a/src/client/src/error.rs
+++ b/src/client/src/error.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 use std::sync::Arc;
 
diff --git a/src/client/src/lib.rs b/src/client/src/lib.rs
index 3ce630a301a4..931f45c802e7 100644
--- a/src/client/src/lib.rs
+++ b/src/client/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod admin;
 mod client;
 mod database;
diff --git a/src/client/src/load_balance.rs b/src/client/src/load_balance.rs
index 60e37a4e1bdc..90b2fae33979 100644
--- a/src/client/src/load_balance.rs
+++ b/src/client/src/load_balance.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use enum_dispatch::enum_dispatch;
 use rand::seq::SliceRandom;
 
diff --git a/src/cmd/Cargo.toml b/src/cmd/Cargo.toml
index 6da004f16956..30d2c504db1a 100644
--- a/src/cmd/Cargo.toml
+++ b/src/cmd/Cargo.toml
@@ -3,6 +3,7 @@ name = "cmd"
 version = "0.1.0"
 edition = "2021"
 default-run = "greptime"
+license = "Apache-2.0"
 
 [[bin]]
 name = "greptime"
diff --git a/src/cmd/src/bin/greptime.rs b/src/cmd/src/bin/greptime.rs
index b173af1d83d4..4beb4b805d99 100644
--- a/src/cmd/src/bin/greptime.rs
+++ b/src/cmd/src/bin/greptime.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::fmt;
 
 use clap::Parser;
diff --git a/src/cmd/src/datanode.rs b/src/cmd/src/datanode.rs
index 639899a8aa1c..c08d41539add 100644
--- a/src/cmd/src/datanode.rs
+++ b/src/cmd/src/datanode.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use clap::Parser;
 use common_telemetry::logging;
 use datanode::datanode::{Datanode, DatanodeOptions};
diff --git a/src/cmd/src/error.rs b/src/cmd/src/error.rs
index 866783a8f568..cedc7ba19ce8 100644
--- a/src/cmd/src/error.rs
+++ b/src/cmd/src/error.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 
 use common_error::prelude::*;
diff --git a/src/cmd/src/frontend.rs b/src/cmd/src/frontend.rs
index b20e3c0e80e3..416a772c618b 100644
--- a/src/cmd/src/frontend.rs
+++ b/src/cmd/src/frontend.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use clap::Parser;
 use frontend::frontend::{Frontend, FrontendOptions, Mode};
 use frontend::grpc::GrpcOptions;
diff --git a/src/cmd/src/lib.rs b/src/cmd/src/lib.rs
index ee7ee01d6ec3..8b5dc10641ad 100644
--- a/src/cmd/src/lib.rs
+++ b/src/cmd/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 #![feature(assert_matches)]
 
 pub mod datanode;
diff --git a/src/cmd/src/metasrv.rs b/src/cmd/src/metasrv.rs
index 9c9f3b62b5ae..a6cb988cc1c4 100644
--- a/src/cmd/src/metasrv.rs
+++ b/src/cmd/src/metasrv.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use clap::Parser;
 use common_telemetry::logging;
 use meta_srv::bootstrap;
diff --git a/src/cmd/src/standalone.rs b/src/cmd/src/standalone.rs
index 432af68ce285..60c6fae6fe56 100644
--- a/src/cmd/src/standalone.rs
+++ b/src/cmd/src/standalone.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use clap::Parser;
 use common_telemetry::info;
 use datanode::datanode::{Datanode, DatanodeOptions, ObjectStoreConfig};
diff --git a/src/cmd/src/toml_loader.rs b/src/cmd/src/toml_loader.rs
index da87816e139a..8eb1b080b983 100644
--- a/src/cmd/src/toml_loader.rs
+++ b/src/cmd/src/toml_loader.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 macro_rules! from_file {
     ($path: expr) => {
         toml::from_str(
diff --git a/src/common/base/Cargo.toml b/src/common/base/Cargo.toml
index 0ecd8e262995..c1718a2ae0d2 100644
--- a/src/common/base/Cargo.toml
+++ b/src/common/base/Cargo.toml
@@ -2,6 +2,7 @@
 name = "common-base"
 version = "0.1.0"
 edition = "2021"
+license = "Apache-2.0"
 
 [dependencies]
 bitvec = "1.0"
diff --git a/src/common/base/src/bitset.rs b/src/common/base/src/bitset.rs
index dd3529a81b14..3244e749e75d 100644
--- a/src/common/base/src/bitset.rs
+++ b/src/common/base/src/bitset.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use bitvec::prelude as bv;
 
 // `Lsb0` provides the best codegen for bit manipulation,
diff --git a/src/common/base/src/buffer.rs b/src/common/base/src/buffer.rs
index c50bfcaaf565..26303c6f8853 100644
--- a/src/common/base/src/buffer.rs
+++ b/src/common/base/src/buffer.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 use std::io::{Read, Write};
 
diff --git a/src/common/base/src/bytes.rs b/src/common/base/src/bytes.rs
index 2fde5f5f9591..9f5cff5dd91f 100644
--- a/src/common/base/src/bytes.rs
+++ b/src/common/base/src/bytes.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::ops::Deref;
 
 use serde::{Deserialize, Deserializer, Serialize, Serializer};
diff --git a/src/common/base/src/lib.rs b/src/common/base/src/lib.rs
index d31fb9e30f4d..2e58f5d826f2 100644
--- a/src/common/base/src/lib.rs
+++ b/src/common/base/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod bitset;
 pub mod buffer;
 pub mod bytes;
diff --git a/src/common/base/tests/buffer_tests.rs b/src/common/base/tests/buffer_tests.rs
index 958f6312cbfc..76d577618a60 100644
--- a/src/common/base/tests/buffer_tests.rs
+++ b/src/common/base/tests/buffer_tests.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 #![feature(assert_matches)]
 
 #[cfg(test)]
diff --git a/src/common/catalog/Cargo.toml b/src/common/catalog/Cargo.toml
index 1623bf60387a..5df337479cb9 100644
--- a/src/common/catalog/Cargo.toml
+++ b/src/common/catalog/Cargo.toml
@@ -2,7 +2,7 @@
 name = "common-catalog"
 version = "0.1.0"
 edition = "2021"
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+license = "Apache-2.0"
 
 [dependencies]
 async-trait = "0.1"
diff --git a/src/common/catalog/src/consts.rs b/src/common/catalog/src/consts.rs
index 5bd94a75fc9c..775cddcb42a5 100644
--- a/src/common/catalog/src/consts.rs
+++ b/src/common/catalog/src/consts.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub const SYSTEM_CATALOG_NAME: &str = "system";
 pub const INFORMATION_SCHEMA_NAME: &str = "information_schema";
 pub const SYSTEM_CATALOG_TABLE_NAME: &str = "system_catalog";
diff --git a/src/common/catalog/src/error.rs b/src/common/catalog/src/error.rs
index 0ce3a49f69b4..0a4613b89b9a 100644
--- a/src/common/catalog/src/error.rs
+++ b/src/common/catalog/src/error.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 
 use common_error::ext::ErrorExt;
diff --git a/src/common/catalog/src/helper.rs b/src/common/catalog/src/helper.rs
index 91598c01045f..e36778c94640 100644
--- a/src/common/catalog/src/helper.rs
+++ b/src/common/catalog/src/helper.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashMap;
 use std::fmt::{Display, Formatter};
 
diff --git a/src/common/catalog/src/lib.rs b/src/common/catalog/src/lib.rs
index eb016c2dd08c..30e01900b3f4 100644
--- a/src/common/catalog/src/lib.rs
+++ b/src/common/catalog/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod consts;
 pub mod error;
 mod helper;
diff --git a/src/common/error/Cargo.toml b/src/common/error/Cargo.toml
index d03de11f551b..0e52c2d09834 100644
--- a/src/common/error/Cargo.toml
+++ b/src/common/error/Cargo.toml
@@ -2,7 +2,7 @@
 name = "common-error"
 version = "0.1.0"
 edition = "2021"
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+license = "Apache-2.0"
 
 [dependencies]
 snafu = { version = "0.7", features = ["backtraces"] }
diff --git a/src/common/error/src/ext.rs b/src/common/error/src/ext.rs
index 934b5b4ea3a1..54b4343120f7 100644
--- a/src/common/error/src/ext.rs
+++ b/src/common/error/src/ext.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 
 use crate::status_code::StatusCode;
diff --git a/src/common/error/src/format.rs b/src/common/error/src/format.rs
index 74e3c6bd5d70..4113621cb094 100644
--- a/src/common/error/src/format.rs
+++ b/src/common/error/src/format.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::fmt;
 
 use crate::ext::ErrorExt;
diff --git a/src/common/error/src/lib.rs b/src/common/error/src/lib.rs
index f65f8190a52d..0b8542137af0 100644
--- a/src/common/error/src/lib.rs
+++ b/src/common/error/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod ext;
 pub mod format;
 pub mod mock;
diff --git a/src/common/error/src/mock.rs b/src/common/error/src/mock.rs
index a1b23dcbcce7..e3165aefe072 100644
--- a/src/common/error/src/mock.rs
+++ b/src/common/error/src/mock.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Utils for mock.
 
 use std::any::Any;
diff --git a/src/common/error/src/status_code.rs b/src/common/error/src/status_code.rs
index 299c8fd1bc37..1489de6e6002 100644
--- a/src/common/error/src/status_code.rs
+++ b/src/common/error/src/status_code.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::fmt;
 
 /// Common status code for public API.
diff --git a/src/common/function-macro/Cargo.toml b/src/common/function-macro/Cargo.toml
index 51749b388cf1..35ebd78347ec 100644
--- a/src/common/function-macro/Cargo.toml
+++ b/src/common/function-macro/Cargo.toml
@@ -2,6 +2,7 @@
 name = "common-function-macro"
 version = "0.1.0"
 edition = "2021"
+license = "Apache-2.0"
 
 [lib]
 proc-macro = true
diff --git a/src/common/function-macro/src/lib.rs b/src/common/function-macro/src/lib.rs
index 5d95d346b394..da254c3c1633 100644
--- a/src/common/function-macro/src/lib.rs
+++ b/src/common/function-macro/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use proc_macro::TokenStream;
 use quote::{quote, quote_spanned};
 use syn::parse::Parser;
diff --git a/src/common/function-macro/tests/test_derive.rs b/src/common/function-macro/tests/test_derive.rs
index 08c57c24032b..fb4e9bf1db17 100644
--- a/src/common/function-macro/tests/test_derive.rs
+++ b/src/common/function-macro/tests/test_derive.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use common_function_macro::{as_aggr_func_creator, AggrFuncTypeStore};
 use static_assertions::{assert_fields, assert_impl_all};
 
diff --git a/src/common/function/Cargo.toml b/src/common/function/Cargo.toml
index b5f118dfbd9d..214fa0ade9e0 100644
--- a/src/common/function/Cargo.toml
+++ b/src/common/function/Cargo.toml
@@ -2,6 +2,7 @@
 edition = "2021"
 name = "common-function"
 version = "0.1.0"
+license = "Apache-2.0"
 
 [dependencies]
 arc-swap = "1.0"
@@ -21,7 +22,16 @@ snafu = { version = "0.7", features = ["backtraces"] }
 statrs = "0.15"
 
 [dependencies.arrow]
-features = ["io_csv", "io_json", "io_parquet", "io_parquet_compression", "io_ipc", "ahash", "compute", "serde_types"]
+features = [
+    "io_csv",
+    "io_json",
+    "io_parquet",
+    "io_parquet_compression",
+    "io_ipc",
+    "ahash",
+    "compute",
+    "serde_types",
+]
 package = "arrow2"
 version = "0.10"
 
diff --git a/src/common/function/src/error.rs b/src/common/function/src/error.rs
index c184f6c2fab4..73c3928a009c 100644
--- a/src/common/function/src/error.rs
+++ b/src/common/function/src/error.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 
 use common_error::prelude::*;
diff --git a/src/common/function/src/lib.rs b/src/common/function/src/lib.rs
index b7bfa04e41b7..5a1b8edacb69 100644
--- a/src/common/function/src/lib.rs
+++ b/src/common/function/src/lib.rs
@@ -1,2 +1,16 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod error;
 pub mod scalars;
diff --git a/src/common/function/src/scalars.rs b/src/common/function/src/scalars.rs
index f59ed52db667..d362ea5f897d 100644
--- a/src/common/function/src/scalars.rs
+++ b/src/common/function/src/scalars.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod aggregate;
 pub mod expression;
 pub mod function;
diff --git a/src/common/function/src/scalars/aggregate/argmax.rs b/src/common/function/src/scalars/aggregate/argmax.rs
index dd5e2d275ffc..0b63a766bd41 100644
--- a/src/common/function/src/scalars/aggregate/argmax.rs
+++ b/src/common/function/src/scalars/aggregate/argmax.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::cmp::Ordering;
 use std::sync::Arc;
 
diff --git a/src/common/function/src/scalars/aggregate/argmin.rs b/src/common/function/src/scalars/aggregate/argmin.rs
index 61ccecc3cc87..bcbd6571c5b8 100644
--- a/src/common/function/src/scalars/aggregate/argmin.rs
+++ b/src/common/function/src/scalars/aggregate/argmin.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::cmp::Ordering;
 use std::sync::Arc;
 
diff --git a/src/common/function/src/scalars/aggregate/diff.rs b/src/common/function/src/scalars/aggregate/diff.rs
index 7fb10a01ce05..d0e7ca340646 100644
--- a/src/common/function/src/scalars/aggregate/diff.rs
+++ b/src/common/function/src/scalars/aggregate/diff.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::marker::PhantomData;
 use std::sync::Arc;
 
diff --git a/src/common/function/src/scalars/aggregate/mean.rs b/src/common/function/src/scalars/aggregate/mean.rs
index 4f37a49d4e7b..2393a58cd2ef 100644
--- a/src/common/function/src/scalars/aggregate/mean.rs
+++ b/src/common/function/src/scalars/aggregate/mean.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::marker::PhantomData;
 use std::sync::Arc;
 
diff --git a/src/common/function/src/scalars/aggregate/median.rs b/src/common/function/src/scalars/aggregate/median.rs
index 7cd3601a5c3d..4c445c0fb912 100644
--- a/src/common/function/src/scalars/aggregate/median.rs
+++ b/src/common/function/src/scalars/aggregate/median.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::cmp::Reverse;
 use std::collections::BinaryHeap;
 use std::sync::Arc;
diff --git a/src/common/function/src/scalars/aggregate/mod.rs b/src/common/function/src/scalars/aggregate/mod.rs
index 06dbf365615f..8a4712a1b825 100644
--- a/src/common/function/src/scalars/aggregate/mod.rs
+++ b/src/common/function/src/scalars/aggregate/mod.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 mod argmax;
 mod argmin;
 mod diff;
diff --git a/src/common/function/src/scalars/aggregate/percentile.rs b/src/common/function/src/scalars/aggregate/percentile.rs
index fbf497edcc92..1b642dd27412 100644
--- a/src/common/function/src/scalars/aggregate/percentile.rs
+++ b/src/common/function/src/scalars/aggregate/percentile.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::cmp::Reverse;
 use std::collections::BinaryHeap;
 use std::sync::Arc;
diff --git a/src/common/function/src/scalars/aggregate/polyval.rs b/src/common/function/src/scalars/aggregate/polyval.rs
index aa9f2e35ebde..75a9d809f7f3 100644
--- a/src/common/function/src/scalars/aggregate/polyval.rs
+++ b/src/common/function/src/scalars/aggregate/polyval.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::marker::PhantomData;
 use std::sync::Arc;
 
diff --git a/src/common/function/src/scalars/aggregate/scipy_stats_norm_cdf.rs b/src/common/function/src/scalars/aggregate/scipy_stats_norm_cdf.rs
index 4346b1b00406..8f43b64e9273 100644
--- a/src/common/function/src/scalars/aggregate/scipy_stats_norm_cdf.rs
+++ b/src/common/function/src/scalars/aggregate/scipy_stats_norm_cdf.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use common_function_macro::{as_aggr_func_creator, AggrFuncTypeStore};
diff --git a/src/common/function/src/scalars/aggregate/scipy_stats_norm_pdf.rs b/src/common/function/src/scalars/aggregate/scipy_stats_norm_pdf.rs
index b38b90d0dd30..e381d11b546a 100644
--- a/src/common/function/src/scalars/aggregate/scipy_stats_norm_pdf.rs
+++ b/src/common/function/src/scalars/aggregate/scipy_stats_norm_pdf.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use common_function_macro::{as_aggr_func_creator, AggrFuncTypeStore};
diff --git a/src/common/function/src/scalars/expression/binary.rs b/src/common/function/src/scalars/expression/binary.rs
index f0eea0ec2d11..b02e46c93734 100644
--- a/src/common/function/src/scalars/expression/binary.rs
+++ b/src/common/function/src/scalars/expression/binary.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::iter;
 
 use datatypes::prelude::*;
diff --git a/src/common/function/src/scalars/expression/ctx.rs b/src/common/function/src/scalars/expression/ctx.rs
index 87f7e5afeaaa..7910bb82b8d2 100644
--- a/src/common/function/src/scalars/expression/ctx.rs
+++ b/src/common/function/src/scalars/expression/ctx.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use chrono_tz::Tz;
 
 use crate::error::Error;
diff --git a/src/common/function/src/scalars/expression/mod.rs b/src/common/function/src/scalars/expression/mod.rs
index 6fe84c189c73..a66b0d04e573 100644
--- a/src/common/function/src/scalars/expression/mod.rs
+++ b/src/common/function/src/scalars/expression/mod.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 mod binary;
 mod ctx;
 mod unary;
diff --git a/src/common/function/src/scalars/expression/unary.rs b/src/common/function/src/scalars/expression/unary.rs
index 848b4edcd11d..a3434a2b0e4d 100644
--- a/src/common/function/src/scalars/expression/unary.rs
+++ b/src/common/function/src/scalars/expression/unary.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use datatypes::prelude::*;
 use snafu::ResultExt;
 
diff --git a/src/common/function/src/scalars/function.rs b/src/common/function/src/scalars/function.rs
index 751803eff359..353f524ea99d 100644
--- a/src/common/function/src/scalars/function.rs
+++ b/src/common/function/src/scalars/function.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::fmt;
 use std::sync::Arc;
 
diff --git a/src/common/function/src/scalars/function_registry.rs b/src/common/function/src/scalars/function_registry.rs
index a3c9d5d4a34c..ff8dc2338bae 100644
--- a/src/common/function/src/scalars/function_registry.rs
+++ b/src/common/function/src/scalars/function_registry.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! functions registry
 use std::collections::HashMap;
 use std::sync::{Arc, RwLock};
diff --git a/src/common/function/src/scalars/math/mod.rs b/src/common/function/src/scalars/math/mod.rs
index bd9f60b85557..db3d4a51bf75 100644
--- a/src/common/function/src/scalars/math/mod.rs
+++ b/src/common/function/src/scalars/math/mod.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 mod pow;
 
 use std::sync::Arc;
diff --git a/src/common/function/src/scalars/math/pow.rs b/src/common/function/src/scalars/math/pow.rs
index 0df373900430..fcbb87724039 100644
--- a/src/common/function/src/scalars/math/pow.rs
+++ b/src/common/function/src/scalars/math/pow.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::fmt;
 use std::sync::Arc;
 
diff --git a/src/common/function/src/scalars/numpy/clip.rs b/src/common/function/src/scalars/numpy/clip.rs
index 63455c08310f..f743bf5ff56d 100644
--- a/src/common/function/src/scalars/numpy/clip.rs
+++ b/src/common/function/src/scalars/numpy/clip.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::fmt;
 use std::sync::Arc;
 
diff --git a/src/common/function/src/scalars/numpy/interp.rs b/src/common/function/src/scalars/numpy/interp.rs
index cacd0729150b..f2c3b28bb3ec 100644
--- a/src/common/function/src/scalars/numpy/interp.rs
+++ b/src/common/function/src/scalars/numpy/interp.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use arrow::array::PrimitiveArray;
diff --git a/src/common/function/src/scalars/numpy/mod.rs b/src/common/function/src/scalars/numpy/mod.rs
index 2c648b73b852..76140fb7def3 100644
--- a/src/common/function/src/scalars/numpy/mod.rs
+++ b/src/common/function/src/scalars/numpy/mod.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 mod clip;
 #[allow(unused)]
 mod interp;
diff --git a/src/common/function/src/scalars/test.rs b/src/common/function/src/scalars/test.rs
index fb0dfeb519d3..7d74ff5d83e1 100644
--- a/src/common/function/src/scalars/test.rs
+++ b/src/common/function/src/scalars/test.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::fmt;
 use std::sync::Arc;
 
diff --git a/src/common/function/src/scalars/timestamp/from_unixtime.rs b/src/common/function/src/scalars/timestamp/from_unixtime.rs
index b3a5472de1a2..f4805474368b 100644
--- a/src/common/function/src/scalars/timestamp/from_unixtime.rs
+++ b/src/common/function/src/scalars/timestamp/from_unixtime.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! from_unixtime function.
 /// TODO(dennis) It can be removed after we upgrade datafusion.
 use std::fmt;
diff --git a/src/common/function/src/scalars/timestamp/mod.rs b/src/common/function/src/scalars/timestamp/mod.rs
index 5648b313893d..f326aec283db 100644
--- a/src/common/function/src/scalars/timestamp/mod.rs
+++ b/src/common/function/src/scalars/timestamp/mod.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 mod from_unixtime;
 
diff --git a/src/common/function/src/scalars/udf.rs b/src/common/function/src/scalars/udf.rs
index cef806a985ca..b2d47af34db3 100644
--- a/src/common/function/src/scalars/udf.rs
+++ b/src/common/function/src/scalars/udf.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use common_query::error::{ExecuteFunctionSnafu, FromScalarValueSnafu};
diff --git a/src/common/grpc/Cargo.toml b/src/common/grpc/Cargo.toml
index e72abc1996f5..0e1c8283d4e3 100644
--- a/src/common/grpc/Cargo.toml
+++ b/src/common/grpc/Cargo.toml
@@ -2,6 +2,7 @@
 name = "common-grpc"
 version = "0.1.0"
 edition = "2021"
+license = "Apache-2.0"
 
 [dependencies]
 api = { path = "../../api" }
@@ -10,7 +11,9 @@ common-base = { path = "../base" }
 common-error = { path = "../error" }
 common-runtime = { path = "../runtime" }
 dashmap = "5.4"
-datafusion = { git = "https://github.com/apache/arrow-datafusion.git", branch = "arrow2", features = ["simd"] }
+datafusion = { git = "https://github.com/apache/arrow-datafusion.git", branch = "arrow2", features = [
+    "simd",
+] }
 snafu = { version = "0.7", features = ["backtraces"] }
 tokio = { version = "1.0", features = ["full"] }
 tonic = "0.8"
@@ -19,7 +22,16 @@ tower = "0.4"
 [dependencies.arrow]
 package = "arrow2"
 version = "0.10"
-features = ["io_csv", "io_json", "io_parquet", "io_parquet_compression", "io_ipc", "ahash", "compute", "serde_types"]
+features = [
+    "io_csv",
+    "io_json",
+    "io_parquet",
+    "io_parquet_compression",
+    "io_ipc",
+    "ahash",
+    "compute",
+    "serde_types",
+]
 
 [dev-dependencies]
 criterion = "0.4"
diff --git a/src/common/grpc/benches/bench_main.rs b/src/common/grpc/benches/bench_main.rs
index b1e7a22bf242..3d29e5ee2e92 100644
--- a/src/common/grpc/benches/bench_main.rs
+++ b/src/common/grpc/benches/bench_main.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use criterion::criterion_main;
 
 mod channel_manager;
diff --git a/src/common/grpc/benches/channel_manager.rs b/src/common/grpc/benches/channel_manager.rs
index c9aa17bd8661..0b95dcddd032 100644
--- a/src/common/grpc/benches/channel_manager.rs
+++ b/src/common/grpc/benches/channel_manager.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use common_grpc::channel_manager::ChannelManager;
 use criterion::{criterion_group, criterion_main, Criterion};
 
diff --git a/src/common/grpc/src/channel_manager.rs b/src/common/grpc/src/channel_manager.rs
index ffb45b10eee1..7bb87872f862 100644
--- a/src/common/grpc/src/channel_manager.rs
+++ b/src/common/grpc/src/channel_manager.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::atomic::{AtomicUsize, Ordering};
 use std::sync::Arc;
 use std::time::Duration;
diff --git a/src/common/grpc/src/error.rs b/src/common/grpc/src/error.rs
index eb62ac7f2a30..9ec77d7355b6 100644
--- a/src/common/grpc/src/error.rs
+++ b/src/common/grpc/src/error.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 
 use api::DecodeError;
diff --git a/src/common/grpc/src/lib.rs b/src/common/grpc/src/lib.rs
index 62a2f53ecd15..f489a9ee93bb 100644
--- a/src/common/grpc/src/lib.rs
+++ b/src/common/grpc/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod channel_manager;
 pub mod error;
 pub mod physical;
diff --git a/src/common/grpc/src/physical.rs b/src/common/grpc/src/physical.rs
index fc3c6a0061c9..13778a863486 100644
--- a/src/common/grpc/src/physical.rs
+++ b/src/common/grpc/src/physical.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 mod expr;
 pub mod plan;
 
diff --git a/src/common/grpc/src/physical/expr.rs b/src/common/grpc/src/physical/expr.rs
index e6dfe70681fa..f0186d192e1b 100644
--- a/src/common/grpc/src/physical/expr.rs
+++ b/src/common/grpc/src/physical/expr.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::result::Result;
 use std::sync::Arc;
 
diff --git a/src/common/grpc/src/physical/plan.rs b/src/common/grpc/src/physical/plan.rs
index 885c7237d644..44a8d79ec628 100644
--- a/src/common/grpc/src/physical/plan.rs
+++ b/src/common/grpc/src/physical/plan.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::ops::Deref;
 use std::result::Result;
 use std::sync::Arc;
diff --git a/src/common/grpc/src/writer.rs b/src/common/grpc/src/writer.rs
index 364c9a01822d..42e27fc887df 100644
--- a/src/common/grpc/src/writer.rs
+++ b/src/common/grpc/src/writer.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashMap;
 
 use api::v1::codec::InsertBatch;
diff --git a/src/common/insert/Cargo.toml b/src/common/insert/Cargo.toml
index b6d28c368090..8dca21eb9a76 100644
--- a/src/common/insert/Cargo.toml
+++ b/src/common/insert/Cargo.toml
@@ -2,8 +2,7 @@
 name = "common-insert"
 version = "0.1.0"
 edition = "2021"
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+license = "Apache-2.0"
 
 [dependencies]
 api = { path = "../../api" }
diff --git a/src/common/insert/src/error.rs b/src/common/insert/src/error.rs
index d06568ff14b2..dbd455b2ece1 100644
--- a/src/common/insert/src/error.rs
+++ b/src/common/insert/src/error.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 
 use api::DecodeError;
diff --git a/src/common/insert/src/insert.rs b/src/common/insert/src/insert.rs
index 173d9121e0fc..4f597d3d372c 100644
--- a/src/common/insert/src/insert.rs
+++ b/src/common/insert/src/insert.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::hash_map::Entry;
 use std::collections::{HashMap, HashSet};
 use std::ops::Deref;
diff --git a/src/common/insert/src/lib.rs b/src/common/insert/src/lib.rs
index eea4a6837bc5..3bac3e0969c5 100644
--- a/src/common/insert/src/lib.rs
+++ b/src/common/insert/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod error;
 mod insert;
 pub use insert::{
diff --git a/src/common/query/Cargo.toml b/src/common/query/Cargo.toml
index 93031856a110..a5bf8960f547 100644
--- a/src/common/query/Cargo.toml
+++ b/src/common/query/Cargo.toml
@@ -2,13 +2,16 @@
 name = "common-query"
 version = "0.1.0"
 edition = "2021"
+license = "Apache-2.0"
 
 [dependencies]
 async-trait = "0.1"
 common-error = { path = "../error" }
 common-recordbatch = { path = "../recordbatch" }
 common-time = { path = "../time" }
-datafusion = { git = "https://github.com/apache/arrow-datafusion.git", branch = "arrow2", features = ["simd"] }
+datafusion = { git = "https://github.com/apache/arrow-datafusion.git", branch = "arrow2", features = [
+    "simd",
+] }
 datafusion-common = { git = "https://github.com/apache/arrow-datafusion.git", branch = "arrow2" }
 datafusion-expr = { git = "https://github.com/apache/arrow-datafusion.git", branch = "arrow2" }
 datatypes = { path = "../../datatypes" }
diff --git a/src/common/query/src/columnar_value.rs b/src/common/query/src/columnar_value.rs
index 2e645979c4c3..849b8b24b739 100644
--- a/src/common/query/src/columnar_value.rs
+++ b/src/common/query/src/columnar_value.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use datafusion_expr::ColumnarValue as DfColumnarValue;
 use datatypes::prelude::ConcreteDataType;
 use datatypes::vectors::{Helper, VectorRef};
diff --git a/src/common/query/src/error.rs b/src/common/query/src/error.rs
index 1e29da234c15..e90df0c300ae 100644
--- a/src/common/query/src/error.rs
+++ b/src/common/query/src/error.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 
 use arrow::datatypes::DataType as ArrowDatatype;
diff --git a/src/common/query/src/function.rs b/src/common/query/src/function.rs
index bcb4170afffd..635dc20cd99f 100644
--- a/src/common/query/src/function.rs
+++ b/src/common/query/src/function.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use arrow::datatypes::DataType as ArrowDataType;
diff --git a/src/common/query/src/lib.rs b/src/common/query/src/lib.rs
index 19bb5b8f1b3a..06b88fcbf8d1 100644
--- a/src/common/query/src/lib.rs
+++ b/src/common/query/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use common_recordbatch::{RecordBatches, SendableRecordBatchStream};
 
 pub mod columnar_value;
diff --git a/src/common/query/src/logical_plan/accumulator.rs b/src/common/query/src/logical_plan/accumulator.rs
index 4247b61c9798..379a582dc1a6 100644
--- a/src/common/query/src/logical_plan/accumulator.rs
+++ b/src/common/query/src/logical_plan/accumulator.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Accumulator module contains the trait definition for aggregation function's accumulators.
 
 use std::fmt::Debug;
diff --git a/src/common/query/src/logical_plan/expr.rs b/src/common/query/src/logical_plan/expr.rs
index bfebbaa9c26c..45cb12cdebc9 100644
--- a/src/common/query/src/logical_plan/expr.rs
+++ b/src/common/query/src/logical_plan/expr.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use datafusion::logical_plan::Expr as DfExpr;
 
 /// Central struct of query API.
diff --git a/src/common/query/src/logical_plan/mod.rs b/src/common/query/src/logical_plan/mod.rs
index 36777ce0c326..89b0e95ccd2d 100644
--- a/src/common/query/src/logical_plan/mod.rs
+++ b/src/common/query/src/logical_plan/mod.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod accumulator;
 mod expr;
 mod udaf;
diff --git a/src/common/query/src/logical_plan/udaf.rs b/src/common/query/src/logical_plan/udaf.rs
index 9761fb470afa..9550946ef945 100644
--- a/src/common/query/src/logical_plan/udaf.rs
+++ b/src/common/query/src/logical_plan/udaf.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Udaf module contains functions and structs supporting user-defined aggregate functions.
 //!
 //! Modified from DataFusion.
diff --git a/src/common/query/src/logical_plan/udf.rs b/src/common/query/src/logical_plan/udf.rs
index dbd0926243bf..b16fb5025457 100644
--- a/src/common/query/src/logical_plan/udf.rs
+++ b/src/common/query/src/logical_plan/udf.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Udf module contains foundational types that are used to represent UDFs.
 //! It's modifed from datafusion.
 use std::fmt;
diff --git a/src/common/query/src/physical_plan.rs b/src/common/query/src/physical_plan.rs
index a1ebda8083af..710554a95707 100644
--- a/src/common/query/src/physical_plan.rs
+++ b/src/common/query/src/physical_plan.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 use std::fmt::Debug;
 use std::sync::Arc;
diff --git a/src/common/query/src/prelude.rs b/src/common/query/src/prelude.rs
index 4ca737456bbc..e1af6f0c418b 100644
--- a/src/common/query/src/prelude.rs
+++ b/src/common/query/src/prelude.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub use datafusion_common::ScalarValue;
 
 pub use crate::columnar_value::ColumnarValue;
diff --git a/src/common/query/src/signature.rs b/src/common/query/src/signature.rs
index 4527e09c4d84..3f2eae882212 100644
--- a/src/common/query/src/signature.rs
+++ b/src/common/query/src/signature.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Signature module contains foundational types that are used to represent signatures, types,
 //! and return types of functions.
 //! Copied and modified from datafusion.
diff --git a/src/common/recordbatch/Cargo.toml b/src/common/recordbatch/Cargo.toml
index aa6aa7dfab3f..a8236120617e 100644
--- a/src/common/recordbatch/Cargo.toml
+++ b/src/common/recordbatch/Cargo.toml
@@ -2,10 +2,13 @@
 name = "common-recordbatch"
 version = "0.1.0"
 edition = "2021"
+license = "Apache-2.0"
 
 [dependencies]
 common-error = { path = "../error" }
-datafusion = { git = "https://github.com/apache/arrow-datafusion.git", branch = "arrow2", features = ["simd"] }
+datafusion = { git = "https://github.com/apache/arrow-datafusion.git", branch = "arrow2", features = [
+    "simd",
+] }
 datafusion-common = { git = "https://github.com/apache/arrow-datafusion.git", branch = "arrow2" }
 datatypes = { path = "../../datatypes" }
 futures = "0.3"
diff --git a/src/common/recordbatch/src/adapter.rs b/src/common/recordbatch/src/adapter.rs
index afbc79d9e6ed..700ba3296129 100644
--- a/src/common/recordbatch/src/adapter.rs
+++ b/src/common/recordbatch/src/adapter.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::pin::Pin;
 use std::sync::Arc;
 use std::task::{Context, Poll};
diff --git a/src/common/recordbatch/src/error.rs b/src/common/recordbatch/src/error.rs
index 2524d159bde6..2425defad8a0 100644
--- a/src/common/recordbatch/src/error.rs
+++ b/src/common/recordbatch/src/error.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Error of record batch.
 use std::any::Any;
 
diff --git a/src/common/recordbatch/src/lib.rs b/src/common/recordbatch/src/lib.rs
index f641365b83c0..71bf32bb5d42 100644
--- a/src/common/recordbatch/src/lib.rs
+++ b/src/common/recordbatch/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod adapter;
 pub mod error;
 mod recordbatch;
diff --git a/src/common/recordbatch/src/recordbatch.rs b/src/common/recordbatch/src/recordbatch.rs
index cd60b5733fbe..b768a2f0bcc8 100644
--- a/src/common/recordbatch/src/recordbatch.rs
+++ b/src/common/recordbatch/src/recordbatch.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use datafusion_common::record_batch::RecordBatch as DfRecordBatch;
 use datatypes::arrow_array::arrow_array_get;
 use datatypes::schema::SchemaRef;
diff --git a/src/common/recordbatch/src/util.rs b/src/common/recordbatch/src/util.rs
index 8a146be1c0e9..efe34dbfed44 100644
--- a/src/common/recordbatch/src/util.rs
+++ b/src/common/recordbatch/src/util.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use futures::TryStreamExt;
 
 use crate::error::Result;
diff --git a/src/common/runtime/Cargo.toml b/src/common/runtime/Cargo.toml
index c26f33f98232..1fc3e7bd0dc7 100644
--- a/src/common/runtime/Cargo.toml
+++ b/src/common/runtime/Cargo.toml
@@ -2,6 +2,7 @@
 name = "common-runtime"
 version = "0.1.0"
 edition = "2021"
+license = "Apache-2.0"
 
 [dependencies]
 common-error = { path = "../error" }
diff --git a/src/common/runtime/src/error.rs b/src/common/runtime/src/error.rs
index b6b5504db207..cbb561c3bb92 100644
--- a/src/common/runtime/src/error.rs
+++ b/src/common/runtime/src/error.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 
 use common_error::prelude::*;
diff --git a/src/common/runtime/src/global.rs b/src/common/runtime/src/global.rs
index 2fec97b6be2d..10fe081e9cd8 100644
--- a/src/common/runtime/src/global.rs
+++ b/src/common/runtime/src/global.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Global runtimes
 use std::future::Future;
 use std::sync::{Mutex, Once};
diff --git a/src/common/runtime/src/lib.rs b/src/common/runtime/src/lib.rs
index 7d2c8503f5a4..539705f40114 100644
--- a/src/common/runtime/src/lib.rs
+++ b/src/common/runtime/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod error;
 mod global;
 pub mod metric;
diff --git a/src/common/runtime/src/metric.rs b/src/common/runtime/src/metric.rs
index 8138fdac97e3..88ba1e303b79 100644
--- a/src/common/runtime/src/metric.rs
+++ b/src/common/runtime/src/metric.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Runtime metrics
 pub const THREAD_NAME_LABEL: &str = "thread.name";
 pub const METRIC_RUNTIME_THREADS_ALIVE: &str = "runtime.threads.alive";
diff --git a/src/common/runtime/src/runtime.rs b/src/common/runtime/src/runtime.rs
index 97949494e0d0..4a306de6490c 100644
--- a/src/common/runtime/src/runtime.rs
+++ b/src/common/runtime/src/runtime.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::future::Future;
 use std::sync::Arc;
 use std::thread;
diff --git a/src/common/substrait/Cargo.toml b/src/common/substrait/Cargo.toml
index 301b8289db2f..0f5502c73263 100644
--- a/src/common/substrait/Cargo.toml
+++ b/src/common/substrait/Cargo.toml
@@ -2,6 +2,7 @@
 name = "substrait"
 version = "0.1.0"
 edition = "2021"
+license = "Apache-2.0"
 
 [dependencies]
 bytes = "1.1"
diff --git a/src/common/substrait/src/df_logical.rs b/src/common/substrait/src/df_logical.rs
index b991004ecd09..f054be910adc 100644
--- a/src/common/substrait/src/df_logical.rs
+++ b/src/common/substrait/src/df_logical.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use bytes::{Buf, Bytes, BytesMut};
diff --git a/src/common/substrait/src/error.rs b/src/common/substrait/src/error.rs
index ad591b949ccb..16e6bec1aa21 100644
--- a/src/common/substrait/src/error.rs
+++ b/src/common/substrait/src/error.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 
 use common_error::prelude::{BoxedError, ErrorExt, StatusCode};
diff --git a/src/common/substrait/src/lib.rs b/src/common/substrait/src/lib.rs
index b5bf75e0bdb3..137796b5271e 100644
--- a/src/common/substrait/src/lib.rs
+++ b/src/common/substrait/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 mod df_logical;
 pub mod error;
 mod schema;
diff --git a/src/common/substrait/src/schema.rs b/src/common/substrait/src/schema.rs
index 42a5ea9ec944..623a4e74164f 100644
--- a/src/common/substrait/src/schema.rs
+++ b/src/common/substrait/src/schema.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use datatypes::schema::{ColumnSchema, Schema};
 use substrait_proto::protobuf::r#type::{Nullability, Struct as SubstraitStruct};
 use substrait_proto::protobuf::NamedStruct;
diff --git a/src/common/substrait/src/types.rs b/src/common/substrait/src/types.rs
index ba6cea28d10f..1cd563c3aeaa 100644
--- a/src/common/substrait/src/types.rs
+++ b/src/common/substrait/src/types.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Methods that perform convertion between Substrait's type ([Type](SType)) and GreptimeDB's type ([ConcreteDataType]).
 //!
 //! Substrait use [type variation](https://substrait.io/types/type_variations/) to express different "logical types".
diff --git a/src/common/telemetry/Cargo.toml b/src/common/telemetry/Cargo.toml
index ff9e69a84cc2..638fb9d58606 100644
--- a/src/common/telemetry/Cargo.toml
+++ b/src/common/telemetry/Cargo.toml
@@ -2,11 +2,11 @@
 name = "common-telemetry"
 version = "0.1.0"
 edition = "2021"
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+license = "Apache-2.0"
 
 [features]
 console = ["console-subscriber"]
-deadlock_detection =["parking_lot"]
+deadlock_detection = ["parking_lot"]
 
 [dependencies]
 backtrace = "0.3"
@@ -15,9 +15,14 @@ console-subscriber = { version = "0.1", optional = true }
 metrics = "0.20"
 metrics-exporter-prometheus = { version = "0.11", default-features = false }
 once_cell = "1.10"
-opentelemetry = { version = "0.17", default-features = false, features = ["trace", "rt-tokio"] }
+opentelemetry = { version = "0.17", default-features = false, features = [
+    "trace",
+    "rt-tokio",
+] }
 opentelemetry-jaeger = { version = "0.16", features = ["rt-tokio"] }
-parking_lot = { version = "0.12", features = ["deadlock_detection"], optional = true }
+parking_lot = { version = "0.12", features = [
+    "deadlock_detection",
+], optional = true }
 tracing = "0.1"
 tracing-appender = "0.2"
 tracing-bunyan-formatter = "0.3"
diff --git a/src/common/telemetry/src/lib.rs b/src/common/telemetry/src/lib.rs
index ed3dd5a79a0c..e8e92cfe6fd1 100644
--- a/src/common/telemetry/src/lib.rs
+++ b/src/common/telemetry/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod logging;
 mod macros;
 pub mod metric;
diff --git a/src/common/telemetry/src/logging.rs b/src/common/telemetry/src/logging.rs
index 2698e2e3f681..6407e04dfa1f 100644
--- a/src/common/telemetry/src/logging.rs
+++ b/src/common/telemetry/src/logging.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! logging stuffs, inspired by databend
 use std::env;
 use std::sync::{Arc, Mutex, Once};
diff --git a/src/common/telemetry/src/macros.rs b/src/common/telemetry/src/macros.rs
index ccd552db0532..d2be6b9e0275 100644
--- a/src/common/telemetry/src/macros.rs
+++ b/src/common/telemetry/src/macros.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 /// The standard logging macro.
 #[macro_export]
 macro_rules! log {
diff --git a/src/common/telemetry/src/metric.rs b/src/common/telemetry/src/metric.rs
index ad35c8547300..d0cbd537eefa 100644
--- a/src/common/telemetry/src/metric.rs
+++ b/src/common/telemetry/src/metric.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 // metric stuffs, inspired by databend
 
 use std::sync::{Arc, Once, RwLock};
diff --git a/src/common/telemetry/src/panic_hook.rs b/src/common/telemetry/src/panic_hook.rs
index 0895450b810d..e29a832637da 100644
--- a/src/common/telemetry/src/panic_hook.rs
+++ b/src/common/telemetry/src/panic_hook.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::panic;
 #[cfg(feature = "deadlock_detection")]
 use std::time::Duration;
diff --git a/src/common/time/Cargo.toml b/src/common/time/Cargo.toml
index 37c0fa89fc64..e76c4d0b6d41 100644
--- a/src/common/time/Cargo.toml
+++ b/src/common/time/Cargo.toml
@@ -2,7 +2,7 @@
 name = "common-time"
 version = "0.1.0"
 edition = "2021"
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+license = "Apache-2.0"
 
 [dependencies]
 chrono = "0.4"
diff --git a/src/common/time/src/date.rs b/src/common/time/src/date.rs
index 5f67a4b8a001..30e452906398 100644
--- a/src/common/time/src/date.rs
+++ b/src/common/time/src/date.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::fmt::{Display, Formatter};
 use std::str::FromStr;
 
diff --git a/src/common/time/src/datetime.rs b/src/common/time/src/datetime.rs
index 88b34a2c5012..4055a07429c5 100644
--- a/src/common/time/src/datetime.rs
+++ b/src/common/time/src/datetime.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::fmt::{Display, Formatter};
 use std::str::FromStr;
 
diff --git a/src/common/time/src/error.rs b/src/common/time/src/error.rs
index 136ce2178006..73e3af577324 100644
--- a/src/common/time/src/error.rs
+++ b/src/common/time/src/error.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use chrono::ParseError;
 use snafu::{Backtrace, Snafu};
 
diff --git a/src/common/time/src/lib.rs b/src/common/time/src/lib.rs
index 44c907e7cbc1..98788a35c37d 100644
--- a/src/common/time/src/lib.rs
+++ b/src/common/time/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod date;
 pub mod datetime;
 pub mod error;
diff --git a/src/common/time/src/range.rs b/src/common/time/src/range.rs
index ef2985a54e09..6c72fdf5b675 100644
--- a/src/common/time/src/range.rs
+++ b/src/common/time/src/range.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use crate::timestamp_millis::TimestampMillis;
 
 /// A half-open time range.
diff --git a/src/common/time/src/timestamp.rs b/src/common/time/src/timestamp.rs
index d3538d78b565..fd0f148d9658 100644
--- a/src/common/time/src/timestamp.rs
+++ b/src/common/time/src/timestamp.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use core::default::Default;
 use std::cmp::Ordering;
 use std::hash::{Hash, Hasher};
diff --git a/src/common/time/src/timestamp_millis.rs b/src/common/time/src/timestamp_millis.rs
index 939bb8bbd1f9..d3da8bd58eca 100644
--- a/src/common/time/src/timestamp_millis.rs
+++ b/src/common/time/src/timestamp_millis.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::cmp::Ordering;
 
 /// Unix timestamp in millisecond resolution.
diff --git a/src/common/time/src/util.rs b/src/common/time/src/util.rs
index e0ec82481888..3d3baebc2ee6 100644
--- a/src/common/time/src/util.rs
+++ b/src/common/time/src/util.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 /// Returns the time duration since UNIX_EPOCH in milliseconds.
 pub fn current_time_millis() -> i64 {
     chrono::Utc::now().timestamp_millis()
diff --git a/src/datanode/Cargo.toml b/src/datanode/Cargo.toml
index a97c11a71522..c722c328d761 100644
--- a/src/datanode/Cargo.toml
+++ b/src/datanode/Cargo.toml
@@ -2,6 +2,7 @@
 name = "datanode"
 version = "0.1.0"
 edition = "2021"
+license = "Apache-2.0"
 
 [features]
 default = ["python"]
diff --git a/src/datanode/src/datanode.rs b/src/datanode/src/datanode.rs
index 669ac2bf949a..78da04cea733 100644
--- a/src/datanode/src/datanode.rs
+++ b/src/datanode/src/datanode.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use common_telemetry::info;
diff --git a/src/datanode/src/error.rs b/src/datanode/src/error.rs
index 5b69570629a5..f5593db57cc1 100644
--- a/src/datanode/src/error.rs
+++ b/src/datanode/src/error.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 
 use common_error::prelude::*;
diff --git a/src/datanode/src/heartbeat.rs b/src/datanode/src/heartbeat.rs
index 17a2a140a484..37431574ebdb 100644
--- a/src/datanode/src/heartbeat.rs
+++ b/src/datanode/src/heartbeat.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::Arc;
 use std::time::Duration;
diff --git a/src/datanode/src/instance.rs b/src/datanode/src/instance.rs
index a0543fd93402..5095b9e91b52 100644
--- a/src/datanode/src/instance.rs
+++ b/src/datanode/src/instance.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 use std::time::Duration;
 use std::{fs, path};
diff --git a/src/datanode/src/instance/grpc.rs b/src/datanode/src/instance/grpc.rs
index 1596cd3824d2..5a58709d45df 100644
--- a/src/datanode/src/instance/grpc.rs
+++ b/src/datanode/src/instance/grpc.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use api::result::{build_err_result, AdminResultBuilder, ObjectResultBuilder};
 use api::v1::{
     admin_expr, insert_expr, object_expr, select_expr, AdminExpr, AdminResult, CreateDatabaseExpr,
diff --git a/src/datanode/src/instance/script.rs b/src/datanode/src/instance/script.rs
index c279fba3c15d..c60a61567795 100644
--- a/src/datanode/src/instance/script.rs
+++ b/src/datanode/src/instance/script.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use async_trait::async_trait;
 use common_query::Output;
 use common_telemetry::timer;
diff --git a/src/datanode/src/instance/sql.rs b/src/datanode/src/instance/sql.rs
index ae5542d75082..fb198f5b754d 100644
--- a/src/datanode/src/instance/sql.rs
+++ b/src/datanode/src/instance/sql.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use async_trait::async_trait;
 use common_error::prelude::BoxedError;
 use common_query::Output;
diff --git a/src/datanode/src/lib.rs b/src/datanode/src/lib.rs
index bcf7097377b7..8540c851f6dd 100644
--- a/src/datanode/src/lib.rs
+++ b/src/datanode/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 #![feature(assert_matches)]
 
 pub mod datanode;
diff --git a/src/datanode/src/metric.rs b/src/datanode/src/metric.rs
index fbdf0e3f9359..97c7197bcfc6 100644
--- a/src/datanode/src/metric.rs
+++ b/src/datanode/src/metric.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! datanode metrics
 
 pub const METRIC_HANDLE_SQL_ELAPSED: &str = "datanode.handle_sql_elapsed";
diff --git a/src/datanode/src/mock.rs b/src/datanode/src/mock.rs
index 4c8720bec8a3..d0ed8f62272e 100644
--- a/src/datanode/src/mock.rs
+++ b/src/datanode/src/mock.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::atomic::{AtomicU32, Ordering};
 use std::sync::Arc;
 
diff --git a/src/datanode/src/script.rs b/src/datanode/src/script.rs
index bdf9dee35009..f8ebea4e1eb6 100644
--- a/src/datanode/src/script.rs
+++ b/src/datanode/src/script.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use catalog::CatalogManagerRef;
 use common_query::Output;
 use query::QueryEngineRef;
diff --git a/src/datanode/src/server.rs b/src/datanode/src/server.rs
index caeb1c936fbd..9abd08ae3cce 100644
--- a/src/datanode/src/server.rs
+++ b/src/datanode/src/server.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::default::Default;
 use std::net::SocketAddr;
 use std::sync::Arc;
diff --git a/src/datanode/src/server/grpc.rs b/src/datanode/src/server/grpc.rs
index 13988d2c7d8a..2900ba751c08 100644
--- a/src/datanode/src/server/grpc.rs
+++ b/src/datanode/src/server/grpc.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 mod ddl;
 pub(crate) mod plan;
 pub mod select;
diff --git a/src/datanode/src/server/grpc/ddl.rs b/src/datanode/src/server/grpc/ddl.rs
index 4247d542abf1..1a0a650cf1a2 100644
--- a/src/datanode/src/server/grpc/ddl.rs
+++ b/src/datanode/src/server/grpc/ddl.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use api::helper::ColumnDataTypeWrapper;
diff --git a/src/datanode/src/server/grpc/plan.rs b/src/datanode/src/server/grpc/plan.rs
index 0a8dd11c9684..48974d1075fd 100644
--- a/src/datanode/src/server/grpc/plan.rs
+++ b/src/datanode/src/server/grpc/plan.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use common_grpc::{AsExcutionPlan, DefaultAsPlanImpl};
diff --git a/src/datanode/src/server/grpc/select.rs b/src/datanode/src/server/grpc/select.rs
index 431fbaf32154..769cb62f0892 100644
--- a/src/datanode/src/server/grpc/select.rs
+++ b/src/datanode/src/server/grpc/select.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use api::helper::ColumnDataTypeWrapper;
diff --git a/src/datanode/src/sql.rs b/src/datanode/src/sql.rs
index 16554fa3144e..01b3247c7e5c 100644
--- a/src/datanode/src/sql.rs
+++ b/src/datanode/src/sql.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! sql handler
 
 use catalog::CatalogManagerRef;
diff --git a/src/datanode/src/sql/alter.rs b/src/datanode/src/sql/alter.rs
index 87ca827850f0..b30dc9c5aca2 100644
--- a/src/datanode/src/sql/alter.rs
+++ b/src/datanode/src/sql/alter.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use common_catalog::consts::{DEFAULT_CATALOG_NAME, DEFAULT_SCHEMA_NAME};
 use common_query::Output;
 use snafu::prelude::*;
diff --git a/src/datanode/src/sql/create.rs b/src/datanode/src/sql/create.rs
index 98a1bf16213d..d02de7021134 100644
--- a/src/datanode/src/sql/create.rs
+++ b/src/datanode/src/sql/create.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashMap;
 use std::sync::Arc;
 
diff --git a/src/datanode/src/sql/insert.rs b/src/datanode/src/sql/insert.rs
index 673e9a490f0a..00aa59a02660 100644
--- a/src/datanode/src/sql/insert.rs
+++ b/src/datanode/src/sql/insert.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use catalog::SchemaProviderRef;
 use common_query::Output;
 use datatypes::prelude::{ConcreteDataType, VectorBuilder};
diff --git a/src/datanode/src/tests.rs b/src/datanode/src/tests.rs
index 3678ed339bcd..5cb02b345300 100644
--- a/src/datanode/src/tests.rs
+++ b/src/datanode/src/tests.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 mod grpc_test;
 mod http_test;
 mod instance_test;
diff --git a/src/datanode/src/tests/grpc_test.rs b/src/datanode/src/tests/grpc_test.rs
index 20865e4a6a86..2ae06ff8dd60 100644
--- a/src/datanode/src/tests/grpc_test.rs
+++ b/src/datanode/src/tests/grpc_test.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::assert_matches::assert_matches;
 use std::collections::HashMap;
 use std::net::SocketAddr;
diff --git a/src/datanode/src/tests/http_test.rs b/src/datanode/src/tests/http_test.rs
index 187cb6414d78..7348fb6430e7 100644
--- a/src/datanode/src/tests/http_test.rs
+++ b/src/datanode/src/tests/http_test.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use axum::http::StatusCode;
diff --git a/src/datanode/src/tests/instance_test.rs b/src/datanode/src/tests/instance_test.rs
index 501821e55286..5f0b9d1104dd 100644
--- a/src/datanode/src/tests/instance_test.rs
+++ b/src/datanode/src/tests/instance_test.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use arrow::array::{Int64Array, UInt64Array, Utf8Array};
 use common_query::Output;
 use common_recordbatch::util;
diff --git a/src/datanode/src/tests/test_util.rs b/src/datanode/src/tests/test_util.rs
index 3c63b844c492..497167c30256 100644
--- a/src/datanode/src/tests/test_util.rs
+++ b/src/datanode/src/tests/test_util.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashMap;
 use std::sync::Arc;
 
diff --git a/src/datatypes/Cargo.toml b/src/datatypes/Cargo.toml
index 708b521b6782..5c66508dd146 100644
--- a/src/datatypes/Cargo.toml
+++ b/src/datatypes/Cargo.toml
@@ -2,6 +2,7 @@
 name = "datatypes"
 version = "0.1.0"
 edition = "2021"
+license = "Apache-2.0"
 
 [features]
 default = []
@@ -24,4 +25,13 @@ snafu = { version = "0.7", features = ["backtraces"] }
 [dependencies.arrow]
 package = "arrow2"
 version = "0.10"
-features = ["io_csv", "io_json", "io_parquet", "io_parquet_compression", "io_ipc", "ahash", "compute", "serde_types"]
+features = [
+    "io_csv",
+    "io_json",
+    "io_parquet",
+    "io_parquet_compression",
+    "io_ipc",
+    "ahash",
+    "compute",
+    "serde_types",
+]
diff --git a/src/datatypes/src/arrow_array.rs b/src/datatypes/src/arrow_array.rs
index ea982a84d12e..1c46932ab86a 100644
--- a/src/datatypes/src/arrow_array.rs
+++ b/src/datatypes/src/arrow_array.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use arrow::array::{
     self, Array, BinaryArray as ArrowBinaryArray, ListArray,
     MutableBinaryArray as ArrowMutableBinaryArray, MutableUtf8Array, PrimitiveArray, Utf8Array,
diff --git a/src/datatypes/src/data_type.rs b/src/datatypes/src/data_type.rs
index 778bf79e1020..ddd3e3f4bcf0 100644
--- a/src/datatypes/src/data_type.rs
+++ b/src/datatypes/src/data_type.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use arrow::datatypes::DataType as ArrowDataType;
diff --git a/src/datatypes/src/deserialize.rs b/src/datatypes/src/deserialize.rs
deleted file mode 100644
index 8b137891791f..000000000000
--- a/src/datatypes/src/deserialize.rs
+++ /dev/null
@@ -1 +0,0 @@
-
diff --git a/src/datatypes/src/error.rs b/src/datatypes/src/error.rs
index 52cefb3026ab..50b49cf2b4bb 100644
--- a/src/datatypes/src/error.rs
+++ b/src/datatypes/src/error.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 
 use common_error::prelude::{ErrorCompat, ErrorExt, Snafu, StatusCode};
diff --git a/src/datatypes/src/lib.rs b/src/datatypes/src/lib.rs
index 1a3a36f686ae..f6f6db112a2c 100644
--- a/src/datatypes/src/lib.rs
+++ b/src/datatypes/src/lib.rs
@@ -1,9 +1,22 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 #![feature(generic_associated_types)]
 #![feature(assert_matches)]
 
 pub mod arrow_array;
 pub mod data_type;
-pub mod deserialize;
 pub mod error;
 pub mod macros;
 pub mod prelude;
diff --git a/src/datatypes/src/macros.rs b/src/datatypes/src/macros.rs
index fb94195e3825..18be9fa375b3 100644
--- a/src/datatypes/src/macros.rs
+++ b/src/datatypes/src/macros.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 ///! Some helper macros for datatypes, copied from databend.
 #[macro_export]
 macro_rules! for_all_scalar_types {
diff --git a/src/datatypes/src/prelude.rs b/src/datatypes/src/prelude.rs
index d3e405204f5a..014a40efaf65 100644
--- a/src/datatypes/src/prelude.rs
+++ b/src/datatypes/src/prelude.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub use crate::data_type::{ConcreteDataType, DataType, DataTypeRef};
 pub use crate::macros::*;
 pub use crate::scalars::{Scalar, ScalarRef, ScalarVector, ScalarVectorBuilder};
diff --git a/src/datatypes/src/scalars.rs b/src/datatypes/src/scalars.rs
index 53b105434b07..ddb8eff007ed 100644
--- a/src/datatypes/src/scalars.rs
+++ b/src/datatypes/src/scalars.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 
 use common_time::{Date, DateTime, Timestamp};
diff --git a/src/datatypes/src/schema.rs b/src/datatypes/src/schema.rs
index 41e4b28496d3..cb3df93896e9 100644
--- a/src/datatypes/src/schema.rs
+++ b/src/datatypes/src/schema.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 mod constraint;
 mod raw;
 
diff --git a/src/datatypes/src/schema/constraint.rs b/src/datatypes/src/schema/constraint.rs
index 1b1734686901..2d2d5e0c36a5 100644
--- a/src/datatypes/src/schema/constraint.rs
+++ b/src/datatypes/src/schema/constraint.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use common_time::util;
diff --git a/src/datatypes/src/schema/raw.rs b/src/datatypes/src/schema/raw.rs
index 8e70d9d0ea2e..f415a1ab85c1 100644
--- a/src/datatypes/src/schema/raw.rs
+++ b/src/datatypes/src/schema/raw.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use serde::{Deserialize, Serialize};
 
 use crate::error::{Error, Result};
diff --git a/src/datatypes/src/serialize.rs b/src/datatypes/src/serialize.rs
index d20bbc313e67..1cbf04cedd79 100644
--- a/src/datatypes/src/serialize.rs
+++ b/src/datatypes/src/serialize.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use crate::error::Result;
 
 pub trait Serializable: Send + Sync {
diff --git a/src/datatypes/src/type_id.rs b/src/datatypes/src/type_id.rs
index 0f96bbc083d9..fa11430dec99 100644
--- a/src/datatypes/src/type_id.rs
+++ b/src/datatypes/src/type_id.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 /// Unique identifier for logical data type.
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub enum LogicalTypeId {
diff --git a/src/datatypes/src/types.rs b/src/datatypes/src/types.rs
index 3bb5bfdb93bf..aabeb59db350 100644
--- a/src/datatypes/src/types.rs
+++ b/src/datatypes/src/types.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 mod binary_type;
 mod boolean_type;
 mod date;
diff --git a/src/datatypes/src/types/binary_type.rs b/src/datatypes/src/types/binary_type.rs
index 5cbe9330b44e..13922ff06310 100644
--- a/src/datatypes/src/types/binary_type.rs
+++ b/src/datatypes/src/types/binary_type.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use arrow::datatypes::DataType as ArrowDataType;
diff --git a/src/datatypes/src/types/boolean_type.rs b/src/datatypes/src/types/boolean_type.rs
index dea059662be5..4566f1d82630 100644
--- a/src/datatypes/src/types/boolean_type.rs
+++ b/src/datatypes/src/types/boolean_type.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use arrow::datatypes::DataType as ArrowDataType;
diff --git a/src/datatypes/src/types/date.rs b/src/datatypes/src/types/date.rs
index d2f57632bf71..8d2cca12fa3f 100644
--- a/src/datatypes/src/types/date.rs
+++ b/src/datatypes/src/types/date.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use arrow::datatypes::DataType as ArrowDataType;
diff --git a/src/datatypes/src/types/datetime.rs b/src/datatypes/src/types/datetime.rs
index d12260f366cd..6166c73f37d5 100644
--- a/src/datatypes/src/types/datetime.rs
+++ b/src/datatypes/src/types/datetime.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use arrow::datatypes::DataType as ArrowDataType;
diff --git a/src/datatypes/src/types/list_type.rs b/src/datatypes/src/types/list_type.rs
index bb95b3fc1061..1ada1090111f 100644
--- a/src/datatypes/src/types/list_type.rs
+++ b/src/datatypes/src/types/list_type.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use arrow::datatypes::{DataType as ArrowDataType, Field};
 use serde::{Deserialize, Serialize};
 
diff --git a/src/datatypes/src/types/null_type.rs b/src/datatypes/src/types/null_type.rs
index 9b1859051522..a0b027dd1492 100644
--- a/src/datatypes/src/types/null_type.rs
+++ b/src/datatypes/src/types/null_type.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use arrow::datatypes::DataType as ArrowDataType;
diff --git a/src/datatypes/src/types/primitive_traits.rs b/src/datatypes/src/types/primitive_traits.rs
index 941d85734904..e900ba217e15 100644
--- a/src/datatypes/src/types/primitive_traits.rs
+++ b/src/datatypes/src/types/primitive_traits.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::cmp::Ordering;
 
 use arrow::compute::arithmetics::basic::NativeArithmetics;
diff --git a/src/datatypes/src/types/primitive_type.rs b/src/datatypes/src/types/primitive_type.rs
index 19418544f528..b9f07ce82c83 100644
--- a/src/datatypes/src/types/primitive_type.rs
+++ b/src/datatypes/src/types/primitive_type.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::TypeId;
 use std::marker::PhantomData;
 
diff --git a/src/datatypes/src/types/string_type.rs b/src/datatypes/src/types/string_type.rs
index c47da8f1bdc9..736a3faac942 100644
--- a/src/datatypes/src/types/string_type.rs
+++ b/src/datatypes/src/types/string_type.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use arrow::datatypes::DataType as ArrowDataType;
diff --git a/src/datatypes/src/types/timestamp.rs b/src/datatypes/src/types/timestamp.rs
index c527419bcfa7..b80d16a64f3b 100644
--- a/src/datatypes/src/types/timestamp.rs
+++ b/src/datatypes/src/types/timestamp.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use arrow::datatypes::{DataType as ArrowDataType, TimeUnit as ArrowTimeUnit};
 use common_time::timestamp::{TimeUnit, Timestamp};
 use serde::{Deserialize, Serialize};
diff --git a/src/datatypes/src/value.rs b/src/datatypes/src/value.rs
index 06adf9990a61..7a52e370f5fa 100644
--- a/src/datatypes/src/value.rs
+++ b/src/datatypes/src/value.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::cmp::Ordering;
 
 use common_base::bytes::{Bytes, StringBytes};
diff --git a/src/datatypes/src/vectors.rs b/src/datatypes/src/vectors.rs
index 6ba9ac841f08..8395daaf1cd3 100644
--- a/src/datatypes/src/vectors.rs
+++ b/src/datatypes/src/vectors.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod binary;
 pub mod boolean;
 mod builder;
diff --git a/src/datatypes/src/vectors/binary.rs b/src/datatypes/src/vectors/binary.rs
index 74b7cf05a347..817b29bca0fa 100644
--- a/src/datatypes/src/vectors/binary.rs
+++ b/src/datatypes/src/vectors/binary.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 use std::sync::Arc;
 
diff --git a/src/datatypes/src/vectors/boolean.rs b/src/datatypes/src/vectors/boolean.rs
index c1d98fa0f27c..fc1302f2c61f 100644
--- a/src/datatypes/src/vectors/boolean.rs
+++ b/src/datatypes/src/vectors/boolean.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 use std::borrow::Borrow;
 use std::sync::Arc;
diff --git a/src/datatypes/src/vectors/builder.rs b/src/datatypes/src/vectors/builder.rs
index 5e97203b002d..67ab2513ab3e 100644
--- a/src/datatypes/src/vectors/builder.rs
+++ b/src/datatypes/src/vectors/builder.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use common_time::date::Date;
diff --git a/src/datatypes/src/vectors/constant.rs b/src/datatypes/src/vectors/constant.rs
index d793f7519e88..d5522007a125 100644
--- a/src/datatypes/src/vectors/constant.rs
+++ b/src/datatypes/src/vectors/constant.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 use std::fmt;
 use std::sync::Arc;
diff --git a/src/datatypes/src/vectors/date.rs b/src/datatypes/src/vectors/date.rs
index 060cb892a585..0198b3622f34 100644
--- a/src/datatypes/src/vectors/date.rs
+++ b/src/datatypes/src/vectors/date.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 use std::sync::Arc;
 
diff --git a/src/datatypes/src/vectors/datetime.rs b/src/datatypes/src/vectors/datetime.rs
index 9bd36cc16560..732e56004c33 100644
--- a/src/datatypes/src/vectors/datetime.rs
+++ b/src/datatypes/src/vectors/datetime.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 use std::sync::Arc;
 
diff --git a/src/datatypes/src/vectors/eq.rs b/src/datatypes/src/vectors/eq.rs
index ea979b1c5373..d47167c3f93e 100644
--- a/src/datatypes/src/vectors/eq.rs
+++ b/src/datatypes/src/vectors/eq.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use crate::data_type::DataType;
diff --git a/src/datatypes/src/vectors/helper.rs b/src/datatypes/src/vectors/helper.rs
index b5de1b0b65e4..60a9f8511fab 100644
--- a/src/datatypes/src/vectors/helper.rs
+++ b/src/datatypes/src/vectors/helper.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Vector helper functions, inspired by databend Series mod
 
 use std::any::Any;
diff --git a/src/datatypes/src/vectors/list.rs b/src/datatypes/src/vectors/list.rs
index d5bb24bcfc89..76d9dd8717eb 100644
--- a/src/datatypes/src/vectors/list.rs
+++ b/src/datatypes/src/vectors/list.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 use std::ops::Range;
 use std::sync::Arc;
diff --git a/src/datatypes/src/vectors/mutable.rs b/src/datatypes/src/vectors/mutable.rs
index 1dd6ff78a3a9..5f949574602e 100644
--- a/src/datatypes/src/vectors/mutable.rs
+++ b/src/datatypes/src/vectors/mutable.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 
 use crate::error::Result;
diff --git a/src/datatypes/src/vectors/null.rs b/src/datatypes/src/vectors/null.rs
index 6f01123e2f9c..64974d99b0c0 100644
--- a/src/datatypes/src/vectors/null.rs
+++ b/src/datatypes/src/vectors/null.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 use std::fmt;
 use std::sync::Arc;
diff --git a/src/datatypes/src/vectors/operations.rs b/src/datatypes/src/vectors/operations.rs
index 7ec3b547b501..6caf8fe30024 100644
--- a/src/datatypes/src/vectors/operations.rs
+++ b/src/datatypes/src/vectors/operations.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 mod filter;
 mod find_unique;
 mod replicate;
diff --git a/src/datatypes/src/vectors/operations/filter.rs b/src/datatypes/src/vectors/operations/filter.rs
index 4ae03980475c..7a9f514a1621 100644
--- a/src/datatypes/src/vectors/operations/filter.rs
+++ b/src/datatypes/src/vectors/operations/filter.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub(crate) use crate::vectors::constant::filter_constant;
 
 macro_rules! filter_non_constant {
diff --git a/src/datatypes/src/vectors/operations/find_unique.rs b/src/datatypes/src/vectors/operations/find_unique.rs
index a077c4516f45..3aade173acf8 100644
--- a/src/datatypes/src/vectors/operations/find_unique.rs
+++ b/src/datatypes/src/vectors/operations/find_unique.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use arrow::bitmap::MutableBitmap;
 
 use crate::scalars::ScalarVector;
diff --git a/src/datatypes/src/vectors/operations/replicate.rs b/src/datatypes/src/vectors/operations/replicate.rs
index 340250d19ec5..7fb93134eda5 100644
--- a/src/datatypes/src/vectors/operations/replicate.rs
+++ b/src/datatypes/src/vectors/operations/replicate.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use crate::prelude::*;
 pub(crate) use crate::vectors::constant::replicate_constant;
 pub(crate) use crate::vectors::date::replicate_date;
diff --git a/src/datatypes/src/vectors/primitive.rs b/src/datatypes/src/vectors/primitive.rs
index 6c4521b6979d..c49295630cff 100644
--- a/src/datatypes/src/vectors/primitive.rs
+++ b/src/datatypes/src/vectors/primitive.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 use std::iter::FromIterator;
 use std::slice::Iter;
diff --git a/src/datatypes/src/vectors/string.rs b/src/datatypes/src/vectors/string.rs
index fc7515358113..638b04dd3eea 100644
--- a/src/datatypes/src/vectors/string.rs
+++ b/src/datatypes/src/vectors/string.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 use std::sync::Arc;
 
diff --git a/src/datatypes/src/vectors/timestamp.rs b/src/datatypes/src/vectors/timestamp.rs
index 0b47dc1f5e70..62b8332c895e 100644
--- a/src/datatypes/src/vectors/timestamp.rs
+++ b/src/datatypes/src/vectors/timestamp.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 use std::sync::Arc;
 
diff --git a/src/frontend/Cargo.toml b/src/frontend/Cargo.toml
index d9b7de4219bd..0324f7d85583 100644
--- a/src/frontend/Cargo.toml
+++ b/src/frontend/Cargo.toml
@@ -2,6 +2,7 @@
 name = "frontend"
 version = "0.1.0"
 edition = "2021"
+license = "Apache-2.0"
 
 [dependencies]
 api = { path = "../api" }
@@ -20,7 +21,9 @@ common-runtime = { path = "../common/runtime" }
 common-telemetry = { path = "../common/telemetry" }
 common-time = { path = "../common/time" }
 common-insert = { path = "../common/insert" }
-datafusion = { git = "https://github.com/apache/arrow-datafusion.git", branch = "arrow2", features = ["simd"] }
+datafusion = { git = "https://github.com/apache/arrow-datafusion.git", branch = "arrow2", features = [
+    "simd",
+] }
 datafusion-common = { git = "https://github.com/apache/arrow-datafusion.git", branch = "arrow2" }
 datafusion-expr = { git = "https://github.com/apache/arrow-datafusion.git", branch = "arrow2" }
 
@@ -46,7 +49,16 @@ tokio = { version = "1.18", features = ["full"] }
 [dependencies.arrow]
 package = "arrow2"
 version = "0.10"
-features = ["io_csv", "io_json", "io_parquet", "io_parquet_compression", "io_ipc", "ahash", "compute", "serde_types"]
+features = [
+    "io_csv",
+    "io_json",
+    "io_parquet",
+    "io_parquet_compression",
+    "io_ipc",
+    "ahash",
+    "compute",
+    "serde_types",
+]
 
 [dev-dependencies]
 datanode = { path = "../datanode" }
diff --git a/src/frontend/src/catalog.rs b/src/frontend/src/catalog.rs
index f725d7a4c554..0cd4e9a30e03 100644
--- a/src/frontend/src/catalog.rs
+++ b/src/frontend/src/catalog.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 use std::collections::HashSet;
 use std::sync::Arc;
diff --git a/src/frontend/src/datanode.rs b/src/frontend/src/datanode.rs
index 9884e707310c..c365ff2c33d3 100644
--- a/src/frontend/src/datanode.rs
+++ b/src/frontend/src/datanode.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::time::Duration;
 
 use client::Client;
diff --git a/src/frontend/src/error.rs b/src/frontend/src/error.rs
index a15910d41beb..ad5ba0a6e7f6 100644
--- a/src/frontend/src/error.rs
+++ b/src/frontend/src/error.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 
 use common_error::prelude::*;
diff --git a/src/frontend/src/expr_factory.rs b/src/frontend/src/expr_factory.rs
index 4e554cbcd60e..c8c7646c2c6b 100644
--- a/src/frontend/src/expr_factory.rs
+++ b/src/frontend/src/expr_factory.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashMap;
 use std::sync::Arc;
 
diff --git a/src/frontend/src/frontend.rs b/src/frontend/src/frontend.rs
index 2b3a36e3a170..c35b9a61c529 100644
--- a/src/frontend/src/frontend.rs
+++ b/src/frontend/src/frontend.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use serde::{Deserialize, Serialize};
diff --git a/src/frontend/src/grpc.rs b/src/frontend/src/grpc.rs
index c85244d4f7c0..8c20556f1af9 100644
--- a/src/frontend/src/grpc.rs
+++ b/src/frontend/src/grpc.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use serde::{Deserialize, Serialize};
 
 #[derive(Clone, Debug, Serialize, Deserialize)]
diff --git a/src/frontend/src/influxdb.rs b/src/frontend/src/influxdb.rs
index da96bc99890e..dc5dcec4ea18 100644
--- a/src/frontend/src/influxdb.rs
+++ b/src/frontend/src/influxdb.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use serde::{Deserialize, Serialize};
 
 #[derive(Clone, Debug, Serialize, Deserialize)]
diff --git a/src/frontend/src/instance.rs b/src/frontend/src/instance.rs
index 687c21fc8bf9..e34e8a271f68 100644
--- a/src/frontend/src/instance.rs
+++ b/src/frontend/src/instance.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub(crate) mod distributed;
 mod influxdb;
 mod opentsdb;
diff --git a/src/frontend/src/instance/distributed.rs b/src/frontend/src/instance/distributed.rs
index e8e14fdd8226..ced630b6180c 100644
--- a/src/frontend/src/instance/distributed.rs
+++ b/src/frontend/src/instance/distributed.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashMap;
 use std::sync::Arc;
 
diff --git a/src/frontend/src/instance/influxdb.rs b/src/frontend/src/instance/influxdb.rs
index c938a4591a47..e81639fa3a59 100644
--- a/src/frontend/src/instance/influxdb.rs
+++ b/src/frontend/src/instance/influxdb.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashMap;
 
 use api::v1::codec::InsertBatch;
diff --git a/src/frontend/src/instance/opentsdb.rs b/src/frontend/src/instance/opentsdb.rs
index 75fe56f32184..7ad21fd59571 100644
--- a/src/frontend/src/instance/opentsdb.rs
+++ b/src/frontend/src/instance/opentsdb.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use async_trait::async_trait;
 use common_error::prelude::BoxedError;
 use servers::error as server_error;
diff --git a/src/frontend/src/instance/prometheus.rs b/src/frontend/src/instance/prometheus.rs
index 97b77d5266ec..224cb6bed70e 100644
--- a/src/frontend/src/instance/prometheus.rs
+++ b/src/frontend/src/instance/prometheus.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use api::prometheus::remote::read_request::ResponseType;
 use api::prometheus::remote::{Query, QueryResult, ReadRequest, ReadResponse, WriteRequest};
 use async_trait::async_trait;
diff --git a/src/frontend/src/lib.rs b/src/frontend/src/lib.rs
index a849b09f8d83..1059f1081de4 100644
--- a/src/frontend/src/lib.rs
+++ b/src/frontend/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 #![feature(assert_matches)]
 
 mod catalog;
diff --git a/src/frontend/src/mock.rs b/src/frontend/src/mock.rs
index d7835d6c7e58..9dfbcd256b17 100644
--- a/src/frontend/src/mock.rs
+++ b/src/frontend/src/mock.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 // FIXME(LFC): no mock
 
 use std::fmt::Formatter;
diff --git a/src/frontend/src/mysql.rs b/src/frontend/src/mysql.rs
index f1d688790e55..56ef19834a35 100644
--- a/src/frontend/src/mysql.rs
+++ b/src/frontend/src/mysql.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use serde::{Deserialize, Serialize};
 
 #[derive(Clone, Debug, Serialize, Deserialize)]
diff --git a/src/frontend/src/opentsdb.rs b/src/frontend/src/opentsdb.rs
index 27521673428d..c905189a17ec 100644
--- a/src/frontend/src/opentsdb.rs
+++ b/src/frontend/src/opentsdb.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use serde::{Deserialize, Serialize};
 
 #[derive(Clone, Debug, Serialize, Deserialize)]
diff --git a/src/frontend/src/partitioning.rs b/src/frontend/src/partitioning.rs
index a71cdb988800..e83e3bc45406 100644
--- a/src/frontend/src/partitioning.rs
+++ b/src/frontend/src/partitioning.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub(crate) mod columns;
 pub(crate) mod range;
 
diff --git a/src/frontend/src/partitioning/columns.rs b/src/frontend/src/partitioning/columns.rs
index ad5194f0dc85..3d8704906ef4 100644
--- a/src/frontend/src/partitioning/columns.rs
+++ b/src/frontend/src/partitioning/columns.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 
 use datafusion_expr::Operator;
diff --git a/src/frontend/src/partitioning/range.rs b/src/frontend/src/partitioning/range.rs
index 518c2f9d3c7f..dc02a02d2f20 100644
--- a/src/frontend/src/partitioning/range.rs
+++ b/src/frontend/src/partitioning/range.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 
 use datatypes::prelude::*;
diff --git a/src/frontend/src/postgres.rs b/src/frontend/src/postgres.rs
index 930764cc40c0..a77243ce3715 100644
--- a/src/frontend/src/postgres.rs
+++ b/src/frontend/src/postgres.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use serde::{Deserialize, Serialize};
 
 #[derive(Clone, Debug, Serialize, Deserialize)]
diff --git a/src/frontend/src/prometheus.rs b/src/frontend/src/prometheus.rs
index 2d4a1633cf85..3a56e1d8fb4e 100644
--- a/src/frontend/src/prometheus.rs
+++ b/src/frontend/src/prometheus.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use serde::{Deserialize, Serialize};
 
 #[derive(Clone, Debug, Serialize, Deserialize)]
diff --git a/src/frontend/src/server.rs b/src/frontend/src/server.rs
index da4ee51c5e15..9ba9587600b9 100644
--- a/src/frontend/src/server.rs
+++ b/src/frontend/src/server.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::net::SocketAddr;
 use std::sync::Arc;
 
diff --git a/src/frontend/src/spliter.rs b/src/frontend/src/spliter.rs
index c9ed76f172a5..06fc9eca8e6a 100644
--- a/src/frontend/src/spliter.rs
+++ b/src/frontend/src/spliter.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashMap;
 
 use datatypes::value::Value;
diff --git a/src/frontend/src/sql.rs b/src/frontend/src/sql.rs
index fdafa8d172cf..f888d5e83617 100644
--- a/src/frontend/src/sql.rs
+++ b/src/frontend/src/sql.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use catalog::SchemaProviderRef;
 use common_error::snafu::ensure;
 use datatypes::prelude::ConcreteDataType;
diff --git a/src/frontend/src/table.rs b/src/frontend/src/table.rs
index c63e6222249a..9d34f1a81cdc 100644
--- a/src/frontend/src/table.rs
+++ b/src/frontend/src/table.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub(crate) mod route;
 
 use std::any::Any;
diff --git a/src/frontend/src/table/insert.rs b/src/frontend/src/table/insert.rs
index b7f3afd7f268..09dabcb02aad 100644
--- a/src/frontend/src/table/insert.rs
+++ b/src/frontend/src/table/insert.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashMap;
 use std::sync::Arc;
 
diff --git a/src/frontend/src/table/route.rs b/src/frontend/src/table/route.rs
index 051e73d4cf09..eaeb3e14c010 100644
--- a/src/frontend/src/table/route.rs
+++ b/src/frontend/src/table/route.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 use std::time::Duration;
 
diff --git a/src/frontend/src/tests.rs b/src/frontend/src/tests.rs
index 5ea03cbb6ae6..18ec172c10c1 100644
--- a/src/frontend/src/tests.rs
+++ b/src/frontend/src/tests.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use client::Client;
diff --git a/src/log-store/Cargo.toml b/src/log-store/Cargo.toml
index c9c1f8c18cd2..77dcd45619ca 100644
--- a/src/log-store/Cargo.toml
+++ b/src/log-store/Cargo.toml
@@ -2,7 +2,7 @@
 name = "log-store"
 version = "0.1.0"
 edition = "2021"
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+license = "Apache-2.0"
 
 [dependencies]
 arc-swap = "1.5"
diff --git a/src/log-store/src/error.rs b/src/log-store/src/error.rs
index 6fed0f1163b9..9b26e3db4d7b 100644
--- a/src/log-store/src/error.rs
+++ b/src/log-store/src/error.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 
 use common_error::ext::BoxedError;
diff --git a/src/log-store/src/fs.rs b/src/log-store/src/fs.rs
index 922e6813e36d..e8f334be4945 100644
--- a/src/log-store/src/fs.rs
+++ b/src/log-store/src/fs.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use store_api::logstore::entry::{Id, Offset};
 use store_api::logstore::AppendResponse;
 
diff --git a/src/log-store/src/fs/chunk.rs b/src/log-store/src/fs/chunk.rs
index bd5d07ae5f12..d123684cd9f2 100644
--- a/src/log-store/src/fs/chunk.rs
+++ b/src/log-store/src/fs/chunk.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::LinkedList;
 
 use common_base::buffer::{Buffer, UnderflowSnafu};
diff --git a/src/log-store/src/fs/config.rs b/src/log-store/src/fs/config.rs
index acdc565245cb..c46abcd5a4be 100644
--- a/src/log-store/src/fs/config.rs
+++ b/src/log-store/src/fs/config.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 #[derive(Debug, Clone)]
 pub struct LogConfig {
     pub append_buffer_size: usize,
diff --git a/src/log-store/src/fs/crc.rs b/src/log-store/src/fs/crc.rs
index 2e620ca1c307..7410d2161603 100644
--- a/src/log-store/src/fs/crc.rs
+++ b/src/log-store/src/fs/crc.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use crc::{Crc, CRC_32_ISCSI};
 
 pub const CRC_ALGO: Crc<u32> = Crc::<u32>::new(&CRC_32_ISCSI);
diff --git a/src/log-store/src/fs/entry.rs b/src/log-store/src/fs/entry.rs
index face0cd03266..5bc92cadbb9e 100644
--- a/src/log-store/src/fs/entry.rs
+++ b/src/log-store/src/fs/entry.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::pin::Pin;
 use std::task::{Context, Poll};
 
diff --git a/src/log-store/src/fs/file.rs b/src/log-store/src/fs/file.rs
index 8f153b07f767..57c7ade56977 100644
--- a/src/log-store/src/fs/file.rs
+++ b/src/log-store/src/fs/file.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::fmt::{Debug, Formatter};
 use std::fs::{File, OpenOptions};
 use std::pin::Pin;
diff --git a/src/log-store/src/fs/file_name.rs b/src/log-store/src/fs/file_name.rs
index 854b30610386..b4b04968f06d 100644
--- a/src/log-store/src/fs/file_name.rs
+++ b/src/log-store/src/fs/file_name.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::fmt::{Display, Formatter};
 use std::path::Path;
 
diff --git a/src/log-store/src/fs/index.rs b/src/log-store/src/fs/index.rs
index ba32d4b5781f..2d1a0da58068 100644
--- a/src/log-store/src/fs/index.rs
+++ b/src/log-store/src/fs/index.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::BTreeMap;
 use std::sync::RwLock;
 
diff --git a/src/log-store/src/fs/io.rs b/src/log-store/src/fs/io.rs
index c63d4d5d07e0..0d4bb2dd556d 100644
--- a/src/log-store/src/fs/io.rs
+++ b/src/log-store/src/fs/io.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 #[cfg(all(unix, not(miri)))]
 mod unix;
 // todo(hl): maybe support windows seek_write/seek_read
diff --git a/src/log-store/src/fs/io/fallback.rs b/src/log-store/src/fs/io/fallback.rs
index 7a6ed5ce838e..a56ca4538a40 100644
--- a/src/log-store/src/fs/io/fallback.rs
+++ b/src/log-store/src/fs/io/fallback.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::convert::TryFrom;
 use std::fs::File;
 
diff --git a/src/log-store/src/fs/io/unix.rs b/src/log-store/src/fs/io/unix.rs
index f2912a3b7318..09dc2bf9218d 100644
--- a/src/log-store/src/fs/io/unix.rs
+++ b/src/log-store/src/fs/io/unix.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::fs::File;
 use std::os::unix::fs::FileExt;
 
diff --git a/src/log-store/src/fs/log.rs b/src/log-store/src/fs/log.rs
index 1019284d0deb..0ecd0c0a3d95 100644
--- a/src/log-store/src/fs/log.rs
+++ b/src/log-store/src/fs/log.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::BTreeMap;
 use std::path::Path;
 use std::sync::Arc;
diff --git a/src/log-store/src/fs/namespace.rs b/src/log-store/src/fs/namespace.rs
index a0f71ea7f818..97a833a1d0b4 100644
--- a/src/log-store/src/fs/namespace.rs
+++ b/src/log-store/src/fs/namespace.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use store_api::logstore::namespace::{Id, Namespace};
 
 #[derive(Clone, Debug)]
diff --git a/src/log-store/src/fs/noop.rs b/src/log-store/src/fs/noop.rs
index 5842811311fe..8d52f3fad739 100644
--- a/src/log-store/src/fs/noop.rs
+++ b/src/log-store/src/fs/noop.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use store_api::logstore::entry::Id;
 use store_api::logstore::namespace::Id as NamespaceId;
 use store_api::logstore::LogStore;
diff --git a/src/log-store/src/lib.rs b/src/log-store/src/lib.rs
index 9e5afc2ab9fe..0cd3815d074e 100644
--- a/src/log-store/src/lib.rs
+++ b/src/log-store/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod error;
 pub mod fs;
 
diff --git a/src/log-store/src/test_util.rs b/src/log-store/src/test_util.rs
index e49007c80291..4c04334accc9 100644
--- a/src/log-store/src/test_util.rs
+++ b/src/log-store/src/test_util.rs
@@ -1 +1,15 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod log_store_util;
diff --git a/src/log-store/src/test_util/log_store_util.rs b/src/log-store/src/test_util/log_store_util.rs
index 2c9d2ad39d6b..fb11928ae32b 100644
--- a/src/log-store/src/test_util/log_store_util.rs
+++ b/src/log-store/src/test_util/log_store_util.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use tempdir::TempDir;
 
 use crate::fs::config::LogConfig;
diff --git a/src/meta-client/Cargo.toml b/src/meta-client/Cargo.toml
index bc10eb52e32e..1d7301957b86 100644
--- a/src/meta-client/Cargo.toml
+++ b/src/meta-client/Cargo.toml
@@ -2,6 +2,7 @@
 name = "meta-client"
 version = "0.1.0"
 edition = "2021"
+license = "Apache-2.0"
 
 [dependencies]
 api = { path = "../api" }
diff --git a/src/meta-client/examples/meta_client.rs b/src/meta-client/examples/meta_client.rs
index 04b3991fdf19..6bf23a488d5a 100644
--- a/src/meta-client/examples/meta_client.rs
+++ b/src/meta-client/examples/meta_client.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::time::Duration;
 
 use api::v1::meta::{HeartbeatRequest, Peer};
diff --git a/src/meta-client/src/client.rs b/src/meta-client/src/client.rs
index be961c8dd56a..547bf6387075 100644
--- a/src/meta-client/src/client.rs
+++ b/src/meta-client/src/client.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 mod heartbeat;
 mod load_balance;
 mod router;
diff --git a/src/meta-client/src/client/heartbeat.rs b/src/meta-client/src/client/heartbeat.rs
index a4cff3fb1694..3c9f5fb44abc 100644
--- a/src/meta-client/src/client/heartbeat.rs
+++ b/src/meta-client/src/client/heartbeat.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashSet;
 use std::sync::Arc;
 
diff --git a/src/meta-client/src/client/load_balance.rs b/src/meta-client/src/client/load_balance.rs
index 3cf55d18ed78..f770056a9891 100644
--- a/src/meta-client/src/client/load_balance.rs
+++ b/src/meta-client/src/client/load_balance.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use rand::Rng;
 
 pub fn random_get<T, F>(len: usize, func: F) -> Option<T>
diff --git a/src/meta-client/src/client/router.rs b/src/meta-client/src/client/router.rs
index 5698cf2c41eb..ec3126f483a5 100644
--- a/src/meta-client/src/client/router.rs
+++ b/src/meta-client/src/client/router.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashSet;
 use std::sync::Arc;
 
diff --git a/src/meta-client/src/client/store.rs b/src/meta-client/src/client/store.rs
index e9cbfd2fb271..400e2fbe4fec 100644
--- a/src/meta-client/src/client/store.rs
+++ b/src/meta-client/src/client/store.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashSet;
 use std::sync::Arc;
 
diff --git a/src/meta-client/src/error.rs b/src/meta-client/src/error.rs
index 14ddf6361586..48252c9d56f8 100644
--- a/src/meta-client/src/error.rs
+++ b/src/meta-client/src/error.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use common_error::prelude::*;
 
 #[derive(Debug, Snafu)]
diff --git a/src/meta-client/src/lib.rs b/src/meta-client/src/lib.rs
index e02c5b921652..459235799c05 100644
--- a/src/meta-client/src/lib.rs
+++ b/src/meta-client/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use serde::{Deserialize, Serialize};
 
 pub mod client;
diff --git a/src/meta-client/src/mocks.rs b/src/meta-client/src/mocks.rs
index 99faaebb2fc5..e0aa7671dddb 100644
--- a/src/meta-client/src/mocks.rs
+++ b/src/meta-client/src/mocks.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use meta_srv::metasrv::SelectorRef;
 use meta_srv::mocks as server_mock;
 use meta_srv::mocks::MockInfo;
diff --git a/src/meta-client/src/rpc.rs b/src/meta-client/src/rpc.rs
index 2adeb01339ca..b6f0dc7b5c01 100644
--- a/src/meta-client/src/rpc.rs
+++ b/src/meta-client/src/rpc.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod router;
 mod store;
 pub mod util;
diff --git a/src/meta-client/src/rpc/router.rs b/src/meta-client/src/rpc/router.rs
index c1eb4a807537..03ceeb285f1c 100644
--- a/src/meta-client/src/rpc/router.rs
+++ b/src/meta-client/src/rpc/router.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashMap;
 
 use api::v1::meta::{
diff --git a/src/meta-client/src/rpc/store.rs b/src/meta-client/src/rpc/store.rs
index 9b878523c786..73fa8e002d93 100644
--- a/src/meta-client/src/rpc/store.rs
+++ b/src/meta-client/src/rpc/store.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use api::v1::meta::{
     BatchPutRequest as PbBatchPutRequest, BatchPutResponse as PbBatchPutResponse,
     CompareAndPutRequest as PbCompareAndPutRequest,
diff --git a/src/meta-client/src/rpc/util.rs b/src/meta-client/src/rpc/util.rs
index 7b84d9b81e5b..58e6bebacb86 100644
--- a/src/meta-client/src/rpc/util.rs
+++ b/src/meta-client/src/rpc/util.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use api::v1::meta::ResponseHeader;
 
 use crate::error;
diff --git a/src/meta-srv/Cargo.toml b/src/meta-srv/Cargo.toml
index af8a87c86134..738ca359faa6 100644
--- a/src/meta-srv/Cargo.toml
+++ b/src/meta-srv/Cargo.toml
@@ -2,6 +2,7 @@
 name = "meta-srv"
 version = "0.1.0"
 edition = "2021"
+license = "Apache-2.0"
 
 [features]
 mock = []
diff --git a/src/meta-srv/examples/kv_store.rs b/src/meta-srv/examples/kv_store.rs
index 466cd9c5767e..3ff381265033 100644
--- a/src/meta-srv/examples/kv_store.rs
+++ b/src/meta-srv/examples/kv_store.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use api::v1::meta::{DeleteRangeRequest, PutRequest, RangeRequest};
 use meta_srv::service::store::etcd::EtcdStore;
 use tracing::{event, subscriber, Level};
diff --git a/src/meta-srv/src/bootstrap.rs b/src/meta-srv/src/bootstrap.rs
index c3616ee18234..db2e269861c3 100644
--- a/src/meta-srv/src/bootstrap.rs
+++ b/src/meta-srv/src/bootstrap.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use api::v1::meta::heartbeat_server::HeartbeatServer;
 use api::v1::meta::router_server::RouterServer;
 use api::v1::meta::store_server::StoreServer;
diff --git a/src/meta-srv/src/election.rs b/src/meta-srv/src/election.rs
index 09a6e2512a44..390d1a12fccf 100644
--- a/src/meta-srv/src/election.rs
+++ b/src/meta-srv/src/election.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub(crate) mod etcd;
 
 use crate::error::Result;
diff --git a/src/meta-srv/src/election/etcd.rs b/src/meta-srv/src/election/etcd.rs
index d1dcf982bbde..d2d3e362c4fb 100644
--- a/src/meta-srv/src/election/etcd.rs
+++ b/src/meta-srv/src/election/etcd.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::Arc;
 use std::time::Duration;
diff --git a/src/meta-srv/src/error.rs b/src/meta-srv/src/error.rs
index 5817a03f7201..359547c461e7 100644
--- a/src/meta-srv/src/error.rs
+++ b/src/meta-srv/src/error.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use common_error::prelude::*;
 use tonic::{Code, Status};
 
diff --git a/src/meta-srv/src/handler.rs b/src/meta-srv/src/handler.rs
index c40dd8ce8d6b..07d36df6f5c0 100644
--- a/src/meta-srv/src/handler.rs
+++ b/src/meta-srv/src/handler.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub(crate) mod check_leader;
 pub(crate) mod datanode_lease;
 pub(crate) mod response_header;
diff --git a/src/meta-srv/src/handler/check_leader.rs b/src/meta-srv/src/handler/check_leader.rs
index 13bae8cfddee..da93c358ea1d 100644
--- a/src/meta-srv/src/handler/check_leader.rs
+++ b/src/meta-srv/src/handler/check_leader.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use api::v1::meta::{Error, HeartbeatRequest};
 
 use crate::error::Result;
diff --git a/src/meta-srv/src/handler/datanode_lease.rs b/src/meta-srv/src/handler/datanode_lease.rs
index da33c7d2502e..ad2467287d62 100644
--- a/src/meta-srv/src/handler/datanode_lease.rs
+++ b/src/meta-srv/src/handler/datanode_lease.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use api::v1::meta::{HeartbeatRequest, PutRequest};
 use common_telemetry::info;
 use common_time::util as time_util;
diff --git a/src/meta-srv/src/handler/response_header.rs b/src/meta-srv/src/handler/response_header.rs
index 32ab981f85ce..97981eb497ce 100644
--- a/src/meta-srv/src/handler/response_header.rs
+++ b/src/meta-srv/src/handler/response_header.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use api::v1::meta::{HeartbeatRequest, ResponseHeader, PROTOCOL_VERSION};
 
 use crate::error::Result;
diff --git a/src/meta-srv/src/keys.rs b/src/meta-srv/src/keys.rs
index 9b4aff18deed..db292042c7f6 100644
--- a/src/meta-srv/src/keys.rs
+++ b/src/meta-srv/src/keys.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::str::FromStr;
 
 use api::v1::meta::TableName;
diff --git a/src/meta-srv/src/lease.rs b/src/meta-srv/src/lease.rs
index f1d64343f1bb..41a9b776781f 100644
--- a/src/meta-srv/src/lease.rs
+++ b/src/meta-srv/src/lease.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use api::v1::meta::RangeRequest;
 
 use crate::error::Result;
diff --git a/src/meta-srv/src/lib.rs b/src/meta-srv/src/lib.rs
index 865d2cb33d7f..44bf9006b84f 100644
--- a/src/meta-srv/src/lib.rs
+++ b/src/meta-srv/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 #![feature(btree_drain_filter)]
 pub mod bootstrap;
 mod election;
diff --git a/src/meta-srv/src/metasrv.rs b/src/meta-srv/src/metasrv.rs
index a21debe78bc3..e0f2548ce1f2 100644
--- a/src/meta-srv/src/metasrv.rs
+++ b/src/meta-srv/src/metasrv.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::Arc;
 
diff --git a/src/meta-srv/src/mocks.rs b/src/meta-srv/src/mocks.rs
index 34ac85b95c37..05e901ec268d 100644
--- a/src/meta-srv/src/mocks.rs
+++ b/src/meta-srv/src/mocks.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use api::v1::meta::heartbeat_server::HeartbeatServer;
diff --git a/src/meta-srv/src/selector.rs b/src/meta-srv/src/selector.rs
index 1b0396047725..34af33808e5b 100644
--- a/src/meta-srv/src/selector.rs
+++ b/src/meta-srv/src/selector.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod lease_based;
 
 use crate::error::Result;
diff --git a/src/meta-srv/src/selector/lease_based.rs b/src/meta-srv/src/selector/lease_based.rs
index bfbd224120a6..5cc218d1b8a5 100644
--- a/src/meta-srv/src/selector/lease_based.rs
+++ b/src/meta-srv/src/selector/lease_based.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use api::v1::meta::Peer;
 use common_time::util as time_util;
 
diff --git a/src/meta-srv/src/sequence.rs b/src/meta-srv/src/sequence.rs
index eef3948f03fb..2737925bbdcc 100644
--- a/src/meta-srv/src/sequence.rs
+++ b/src/meta-srv/src/sequence.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::ops::Range;
 use std::sync::Arc;
 
diff --git a/src/meta-srv/src/service.rs b/src/meta-srv/src/service.rs
index 58dc841e6a63..6061d4297a2f 100644
--- a/src/meta-srv/src/service.rs
+++ b/src/meta-srv/src/service.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::pin::Pin;
 
 use futures::Stream;
diff --git a/src/meta-srv/src/service/admin.rs b/src/meta-srv/src/service/admin.rs
index 13e32a6f59fb..abacfd8872b3 100644
--- a/src/meta-srv/src/service/admin.rs
+++ b/src/meta-srv/src/service/admin.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 mod health;
 
 use std::collections::HashMap;
diff --git a/src/meta-srv/src/service/admin/health.rs b/src/meta-srv/src/service/admin/health.rs
index 60e7d7310a21..7a4649c0e42e 100644
--- a/src/meta-srv/src/service/admin/health.rs
+++ b/src/meta-srv/src/service/admin/health.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashMap;
 
 use tonic::codegen::http;
diff --git a/src/meta-srv/src/service/heartbeat.rs b/src/meta-srv/src/service/heartbeat.rs
index 895a4bb9aa61..a71f9cd63f8d 100644
--- a/src/meta-srv/src/service/heartbeat.rs
+++ b/src/meta-srv/src/service/heartbeat.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::io::ErrorKind;
 use std::sync::atomic::{AtomicU64, Ordering};
 
diff --git a/src/meta-srv/src/service/router.rs b/src/meta-srv/src/service/router.rs
index cdb34c3ecc96..02e65f8a0b42 100644
--- a/src/meta-srv/src/service/router.rs
+++ b/src/meta-srv/src/service/router.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use api::v1::meta::{
     router_server, CreateRequest, Error, PeerDict, PutRequest, RangeRequest, Region, RegionRoute,
     ResponseHeader, RouteRequest, RouteResponse, Table, TableRoute, TableRouteValue,
diff --git a/src/meta-srv/src/service/store.rs b/src/meta-srv/src/service/store.rs
index beef0408cc80..0bb202a9b9e4 100644
--- a/src/meta-srv/src/service/store.rs
+++ b/src/meta-srv/src/service/store.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod etcd;
 pub mod kv;
 pub mod memory;
diff --git a/src/meta-srv/src/service/store/etcd.rs b/src/meta-srv/src/service/store/etcd.rs
index bf1573a7da9f..ffffabac9b29 100644
--- a/src/meta-srv/src/service/store/etcd.rs
+++ b/src/meta-srv/src/service/store/etcd.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use api::v1::meta::{
diff --git a/src/meta-srv/src/service/store/kv.rs b/src/meta-srv/src/service/store/kv.rs
index 52bdf072ada4..9238422831df 100644
--- a/src/meta-srv/src/service/store/kv.rs
+++ b/src/meta-srv/src/service/store/kv.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use api::v1::meta::{
diff --git a/src/meta-srv/src/service/store/memory.rs b/src/meta-srv/src/service/store/memory.rs
index 7caf219d2578..2e52e2bbe8cf 100644
--- a/src/meta-srv/src/service/store/memory.rs
+++ b/src/meta-srv/src/service/store/memory.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::btree_map::Entry;
 use std::collections::BTreeMap;
 use std::ops::Range;
diff --git a/src/meta-srv/src/util.rs b/src/meta-srv/src/util.rs
index d8b2ec7e6078..8fcdfc7e9e8c 100644
--- a/src/meta-srv/src/util.rs
+++ b/src/meta-srv/src/util.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 /// Get prefix end key of `key`.
 #[inline]
 pub fn get_prefix_end_key(key: &[u8]) -> Vec<u8> {
diff --git a/src/object-store/Cargo.toml b/src/object-store/Cargo.toml
index 8ad3bb1a0a68..91e9eb3bb2e3 100644
--- a/src/object-store/Cargo.toml
+++ b/src/object-store/Cargo.toml
@@ -2,7 +2,7 @@
 name = "object-store"
 version = "0.1.0"
 edition = "2021"
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+license = "Apache-2.0"
 
 [dependencies]
 futures = { version = "0.3" }
diff --git a/src/object-store/src/backend.rs b/src/object-store/src/backend.rs
index b28002fe5ee9..d469c0bb7beb 100644
--- a/src/object-store/src/backend.rs
+++ b/src/object-store/src/backend.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod azblob;
 pub mod fs;
 pub mod memory;
diff --git a/src/object-store/src/backend/azblob.rs b/src/object-store/src/backend/azblob.rs
index 0296e6ed2c5d..6a70ef95d37e 100644
--- a/src/object-store/src/backend/azblob.rs
+++ b/src/object-store/src/backend/azblob.rs
@@ -1 +1,15 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub use opendal::services::azblob::{Backend, Builder};
diff --git a/src/object-store/src/backend/fs.rs b/src/object-store/src/backend/fs.rs
index b8f727ed5818..78c03a24bb5d 100644
--- a/src/object-store/src/backend/fs.rs
+++ b/src/object-store/src/backend/fs.rs
@@ -1 +1,15 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub use opendal::services::fs::{Backend, Builder};
diff --git a/src/object-store/src/backend/memory.rs b/src/object-store/src/backend/memory.rs
index 3a27615e1269..7f9e2a4acd5d 100644
--- a/src/object-store/src/backend/memory.rs
+++ b/src/object-store/src/backend/memory.rs
@@ -1 +1,15 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub use opendal::services::memory::{Backend, Builder};
diff --git a/src/object-store/src/backend/s3.rs b/src/object-store/src/backend/s3.rs
index 8eec123285a0..918e84a6b816 100644
--- a/src/object-store/src/backend/s3.rs
+++ b/src/object-store/src/backend/s3.rs
@@ -1 +1,15 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub use opendal::services::s3::{Backend, Builder};
diff --git a/src/object-store/src/lib.rs b/src/object-store/src/lib.rs
index 83545a4e7d5e..88702ebf3a28 100644
--- a/src/object-store/src/lib.rs
+++ b/src/object-store/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub use opendal::io_util::SeekableReader;
 pub use opendal::{
     layers, services, Accessor, DirEntry, DirStreamer, Layer, Object, ObjectMetadata, ObjectMode,
diff --git a/src/object-store/src/util.rs b/src/object-store/src/util.rs
index 32231dca6a44..05447f0594d5 100644
--- a/src/object-store/src/util.rs
+++ b/src/object-store/src/util.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use futures::TryStreamExt;
 
 use crate::{DirEntry, DirStreamer};
diff --git a/src/object-store/tests/object_store_test.rs b/src/object-store/tests/object_store_test.rs
index cb229b43a20d..2b63ac0487ea 100644
--- a/src/object-store/tests/object_store_test.rs
+++ b/src/object-store/tests/object_store_test.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::env;
 
 use anyhow::Result;
diff --git a/src/query/Cargo.toml b/src/query/Cargo.toml
index ad1c5a900317..90f562ea1107 100644
--- a/src/query/Cargo.toml
+++ b/src/query/Cargo.toml
@@ -2,6 +2,7 @@
 name = "query"
 version = "0.1.0"
 edition = "2021"
+license = "Apache-2.0"
 
 [dependencies]
 arc-swap = "1.0"
diff --git a/src/query/src/database.rs b/src/query/src/database.rs
deleted file mode 100644
index 8b137891791f..000000000000
--- a/src/query/src/database.rs
+++ /dev/null
@@ -1 +0,0 @@
-
diff --git a/src/query/src/datafusion.rs b/src/query/src/datafusion.rs
index ded7e41b2ab7..caf8fce1566a 100644
--- a/src/query/src/datafusion.rs
+++ b/src/query/src/datafusion.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Planner, QueryEngine implementations based on DataFusion.
 
 mod catalog_adapter;
diff --git a/src/query/src/datafusion/catalog_adapter.rs b/src/query/src/datafusion/catalog_adapter.rs
index 220b5f0c7ab1..f21cf4406e0a 100644
--- a/src/query/src/datafusion/catalog_adapter.rs
+++ b/src/query/src/datafusion/catalog_adapter.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Catalog adapter between datafusion and greptime query engine.
 
 use std::any::Any;
diff --git a/src/query/src/datafusion/error.rs b/src/query/src/datafusion/error.rs
index c631eb36ecc2..b7bb5d9919db 100644
--- a/src/query/src/datafusion/error.rs
+++ b/src/query/src/datafusion/error.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 
 use common_error::prelude::*;
diff --git a/src/query/src/datafusion/planner.rs b/src/query/src/datafusion/planner.rs
index 5cbed99d3fbf..8d1acb725cca 100644
--- a/src/query/src/datafusion/planner.rs
+++ b/src/query/src/datafusion/planner.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use arrow::datatypes::DataType;
diff --git a/src/query/src/error.rs b/src/query/src/error.rs
index 2e55380640b2..47257b1771f1 100644
--- a/src/query/src/error.rs
+++ b/src/query/src/error.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 
 use common_error::prelude::*;
diff --git a/src/query/src/executor.rs b/src/query/src/executor.rs
index 0d0e45c304ac..46eeaf97fa7f 100644
--- a/src/query/src/executor.rs
+++ b/src/query/src/executor.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use common_query::physical_plan::PhysicalPlan;
diff --git a/src/query/src/expr.rs b/src/query/src/expr.rs
index 8b137891791f..d1be7904f601 100644
--- a/src/query/src/expr.rs
+++ b/src/query/src/expr.rs
@@ -1 +1,15 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 
diff --git a/src/query/src/function.rs b/src/query/src/function.rs
index b5687bf4b434..017106127743 100644
--- a/src/query/src/function.rs
+++ b/src/query/src/function.rs
@@ -1 +1,15 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! GreptimeDB builtin functions
diff --git a/src/query/src/lib.rs b/src/query/src/lib.rs
index 717f01c73f12..14aa4f773c58 100644
--- a/src/query/src/lib.rs
+++ b/src/query/src/lib.rs
@@ -1,4 +1,17 @@
-pub mod database;
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 mod datafusion;
 pub mod error;
 pub mod executor;
diff --git a/src/query/src/logical_optimizer.rs b/src/query/src/logical_optimizer.rs
index 8b4414fd95c3..8c35f856a5ab 100644
--- a/src/query/src/logical_optimizer.rs
+++ b/src/query/src/logical_optimizer.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use crate::error::Result;
 use crate::plan::LogicalPlan;
 use crate::query_engine::QueryContext;
diff --git a/src/query/src/metric.rs b/src/query/src/metric.rs
index 1c843f7ee75d..7f927098f60f 100644
--- a/src/query/src/metric.rs
+++ b/src/query/src/metric.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! query engine metrics
 
 pub static METRIC_PARSE_SQL_ELAPSED: &str = "query.parse_sql_elapsed";
diff --git a/src/query/src/optimizer.rs b/src/query/src/optimizer.rs
index 9bd012af9669..33adbdef701c 100644
--- a/src/query/src/optimizer.rs
+++ b/src/query/src/optimizer.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::str::FromStr;
 use std::sync::Arc;
 
diff --git a/src/query/src/physical_optimizer.rs b/src/query/src/physical_optimizer.rs
index 65bff044eac5..c96d27a7f711 100644
--- a/src/query/src/physical_optimizer.rs
+++ b/src/query/src/physical_optimizer.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use common_query::physical_plan::PhysicalPlan;
diff --git a/src/query/src/physical_planner.rs b/src/query/src/physical_planner.rs
index 6c8ab6c7b3d2..2118f1cc829b 100644
--- a/src/query/src/physical_planner.rs
+++ b/src/query/src/physical_planner.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use common_query::physical_plan::PhysicalPlan;
diff --git a/src/query/src/plan.rs b/src/query/src/plan.rs
index c881bdcb5a93..c7e337c0e98d 100644
--- a/src/query/src/plan.rs
+++ b/src/query/src/plan.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::fmt::Debug;
 
 use datafusion::logical_plan::LogicalPlan as DfLogicalPlan;
diff --git a/src/query/src/planner.rs b/src/query/src/planner.rs
index 413f13833534..8bf3468e0401 100644
--- a/src/query/src/planner.rs
+++ b/src/query/src/planner.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use sql::statements::statement::Statement;
 
 use crate::error::Result;
diff --git a/src/query/src/query_engine.rs b/src/query/src/query_engine.rs
index afbfe91e3ffa..36d2c54d1a93 100644
--- a/src/query/src/query_engine.rs
+++ b/src/query/src/query_engine.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 mod context;
 mod state;
 
diff --git a/src/query/src/query_engine/context.rs b/src/query/src/query_engine/context.rs
index 6606b65048f8..c5b5d20c2d4b 100644
--- a/src/query/src/query_engine/context.rs
+++ b/src/query/src/query_engine/context.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 /// Query engine execution context
 use crate::query_engine::state::QueryEngineState;
 
diff --git a/src/query/src/query_engine/state.rs b/src/query/src/query_engine/state.rs
index a1d50a7cf817..36bd331b36ca 100644
--- a/src/query/src/query_engine/state.rs
+++ b/src/query/src/query_engine/state.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashMap;
 use std::fmt;
 use std::sync::{Arc, RwLock};
diff --git a/src/query/src/sql.rs b/src/query/src/sql.rs
index 0d355a9f49f1..8497e4b0a768 100644
--- a/src/query/src/sql.rs
+++ b/src/query/src/sql.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use catalog::CatalogManagerRef;
diff --git a/src/query/tests/argmax_test.rs b/src/query/tests/argmax_test.rs
index fb9192ef1f60..23ff4785acad 100644
--- a/src/query/tests/argmax_test.rs
+++ b/src/query/tests/argmax_test.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 mod function;
 use common_query::Output;
diff --git a/src/query/tests/argmin_test.rs b/src/query/tests/argmin_test.rs
index d4b025d0ffc0..0e02f9e4a29e 100644
--- a/src/query/tests/argmin_test.rs
+++ b/src/query/tests/argmin_test.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 mod function;
 
diff --git a/src/query/tests/function.rs b/src/query/tests/function.rs
index 895e7cf5d569..f5ecba91eeff 100644
--- a/src/query/tests/function.rs
+++ b/src/query/tests/function.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use catalog::local::{MemoryCatalogManager, MemoryCatalogProvider, MemorySchemaProvider};
diff --git a/src/query/tests/mean_test.rs b/src/query/tests/mean_test.rs
index f43f2cd8a9e4..1b068f2456eb 100644
--- a/src/query/tests/mean_test.rs
+++ b/src/query/tests/mean_test.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 mod function;
 
diff --git a/src/query/tests/my_sum_udaf_example.rs b/src/query/tests/my_sum_udaf_example.rs
index b3ccb2a489bb..dbd042775251 100644
--- a/src/query/tests/my_sum_udaf_example.rs
+++ b/src/query/tests/my_sum_udaf_example.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::fmt::Debug;
 use std::marker::PhantomData;
 use std::sync::Arc;
diff --git a/src/query/tests/percentile_test.rs b/src/query/tests/percentile_test.rs
index 1ef674705e74..c504da231ae0 100644
--- a/src/query/tests/percentile_test.rs
+++ b/src/query/tests/percentile_test.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 mod function;
 use catalog::local::{MemoryCatalogManager, MemoryCatalogProvider, MemorySchemaProvider};
diff --git a/src/query/tests/polyval_test.rs b/src/query/tests/polyval_test.rs
index 5b37849dc339..55285e20e101 100644
--- a/src/query/tests/polyval_test.rs
+++ b/src/query/tests/polyval_test.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 mod function;
 
diff --git a/src/query/tests/pow.rs b/src/query/tests/pow.rs
index 09af588d49fe..4d9006ca29fa 100644
--- a/src/query/tests/pow.rs
+++ b/src/query/tests/pow.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use common_query::error::Result;
diff --git a/src/query/tests/query_engine_test.rs b/src/query/tests/query_engine_test.rs
index 1a515158e883..291c31057f39 100644
--- a/src/query/tests/query_engine_test.rs
+++ b/src/query/tests/query_engine_test.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 mod pow;
 
 use std::sync::Arc;
diff --git a/src/query/tests/scipy_stats_norm_cdf_test.rs b/src/query/tests/scipy_stats_norm_cdf_test.rs
index ae531527e59d..572a4336831f 100644
--- a/src/query/tests/scipy_stats_norm_cdf_test.rs
+++ b/src/query/tests/scipy_stats_norm_cdf_test.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 mod function;
 
diff --git a/src/query/tests/scipy_stats_norm_pdf.rs b/src/query/tests/scipy_stats_norm_pdf.rs
index b744f38afa30..efbf0ddec324 100644
--- a/src/query/tests/scipy_stats_norm_pdf.rs
+++ b/src/query/tests/scipy_stats_norm_pdf.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 mod function;
 
diff --git a/src/script/Cargo.toml b/src/script/Cargo.toml
index 83e350a0c248..b894736c3d23 100644
--- a/src/script/Cargo.toml
+++ b/src/script/Cargo.toml
@@ -2,6 +2,7 @@
 edition = "2021"
 name = "script"
 version = "0.1.0"
+license = "Apache-2.0"
 
 [features]
 default = ["python"]
@@ -15,7 +16,7 @@ python = [
   "dep:rustpython-compiler-core",
   "dep:rustpython-bytecode",
   "dep:rustpython-ast",
-  "dep:paste"
+  "dep:paste",
 ]
 
 [dependencies]
@@ -43,7 +44,10 @@ rustpython-bytecode = { git = "https://github.com/RustPython/RustPython", option
 rustpython-compiler = { git = "https://github.com/RustPython/RustPython", optional = true, rev = "02a1d1d" }
 rustpython-compiler-core = { git = "https://github.com/RustPython/RustPython", optional = true, rev = "02a1d1d" }
 rustpython-parser = { git = "https://github.com/RustPython/RustPython", optional = true, rev = "02a1d1d" }
-rustpython-vm = { git = "https://github.com/RustPython/RustPython", optional = true, rev = "02a1d1d", features = ["default", "freeze-stdlib"] }
+rustpython-vm = { git = "https://github.com/RustPython/RustPython", optional = true, rev = "02a1d1d", features = [
+  "default",
+  "freeze-stdlib",
+] }
 snafu = { version = "0.7", features = ["backtraces"] }
 sql = { path = "../sql" }
 table = { path = "../table" }
diff --git a/src/script/src/engine.rs b/src/script/src/engine.rs
index 92037ae5c168..c9cbd9764a06 100644
--- a/src/script/src/engine.rs
+++ b/src/script/src/engine.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Script engine
 
 use std::any::Any;
diff --git a/src/script/src/error.rs b/src/script/src/error.rs
index 79e640358d09..60e06647a1dc 100644
--- a/src/script/src/error.rs
+++ b/src/script/src/error.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 
 use common_error::ext::ErrorExt;
diff --git a/src/script/src/lib.rs b/src/script/src/lib.rs
index 3dbb7ab74be7..43db30b5d47e 100644
--- a/src/script/src/lib.rs
+++ b/src/script/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 #![feature(iterator_try_reduce)]
 pub mod engine;
 pub mod error;
diff --git a/src/script/src/manager.rs b/src/script/src/manager.rs
index d1ed208c6d16..be9825587056 100644
--- a/src/script/src/manager.rs
+++ b/src/script/src/manager.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Scripts manager
 use std::collections::HashMap;
 use std::sync::{Arc, RwLock};
diff --git a/src/script/src/python.rs b/src/script/src/python.rs
index 05f7fc3374e3..5fb65828be75 100644
--- a/src/script/src/python.rs
+++ b/src/script/src/python.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Python script coprocessor
 
 mod builtins;
diff --git a/src/script/src/python/builtins/mod.rs b/src/script/src/python/builtins/mod.rs
index a7b03485dd3d..ef85d088fec7 100644
--- a/src/script/src/python/builtins/mod.rs
+++ b/src/script/src/python/builtins/mod.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //!  Builtin module contains GreptimeDB builtin udf/udaf
 
 #[cfg(test)]
diff --git a/src/script/src/python/builtins/test.rs b/src/script/src/python/builtins/test.rs
index 50618cd0353d..82c80e4a2942 100644
--- a/src/script/src/python/builtins/test.rs
+++ b/src/script/src/python/builtins/test.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashMap;
 use std::fs::File;
 use std::io::Read;
diff --git a/src/script/src/python/coprocessor.rs b/src/script/src/python/coprocessor.rs
index 39e527d3c4e6..483ecfe2f8ec 100644
--- a/src/script/src/python/coprocessor.rs
+++ b/src/script/src/python/coprocessor.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod compile;
 pub mod parse;
 
diff --git a/src/script/src/python/coprocessor/compile.rs b/src/script/src/python/coprocessor/compile.rs
index 151a0dbd882a..5bef63dc234e 100644
--- a/src/script/src/python/coprocessor/compile.rs
+++ b/src/script/src/python/coprocessor/compile.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! compile script to code object
 
 use rustpython_bytecode::CodeObject;
diff --git a/src/script/src/python/coprocessor/parse.rs b/src/script/src/python/coprocessor/parse.rs
index f329a002e246..51423c9bc52e 100644
--- a/src/script/src/python/coprocessor/parse.rs
+++ b/src/script/src/python/coprocessor/parse.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashSet;
 
 use datatypes::arrow::datatypes::DataType;
diff --git a/src/script/src/python/engine.rs b/src/script/src/python/engine.rs
index 1f52a541c932..7a6c02c8588b 100644
--- a/src/script/src/python/engine.rs
+++ b/src/script/src/python/engine.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Python script engine
 use std::any::Any;
 use std::pin::Pin;
diff --git a/src/script/src/python/error.rs b/src/script/src/python/error.rs
index 8c418af44d8d..4fe9a717bfee 100644
--- a/src/script/src/python/error.rs
+++ b/src/script/src/python/error.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use common_error::prelude::{ErrorCompat, ErrorExt, StatusCode};
 use console::{style, Style};
 use datafusion::error::DataFusionError;
diff --git a/src/script/src/python/test.rs b/src/script/src/python/test.rs
index 6cca4eb7b685..043dcba898ad 100644
--- a/src/script/src/python/test.rs
+++ b/src/script/src/python/test.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 #![allow(clippy::print_stdout, clippy::print_stderr)]
 // for debug purpose, also this is already a
 // test module so allow print_stdout shouldn't be a problem?
diff --git a/src/script/src/python/utils.rs b/src/script/src/python/utils.rs
index 5e4415ea3eb3..fcc0bf39565c 100644
--- a/src/script/src/python/utils.rs
+++ b/src/script/src/python/utils.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use datafusion::arrow::array::{ArrayRef, BooleanArray, NullArray, PrimitiveArray, Utf8Array};
diff --git a/src/script/src/python/vector.rs b/src/script/src/python/vector.rs
index 021b51ddbc58..1ca3d450977e 100644
--- a/src/script/src/python/vector.rs
+++ b/src/script/src/python/vector.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::ops::Deref;
 use std::sync::Arc;
 
diff --git a/src/script/src/table.rs b/src/script/src/table.rs
index fa5b4b462402..6eac35824483 100644
--- a/src/script/src/table.rs
+++ b/src/script/src/table.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Scripts table
 use std::collections::HashMap;
 use std::sync::Arc;
diff --git a/src/servers/Cargo.toml b/src/servers/Cargo.toml
index 1b4654c8b3f0..baf8845bd714 100644
--- a/src/servers/Cargo.toml
+++ b/src/servers/Cargo.toml
@@ -2,6 +2,7 @@
 name = "servers"
 version = "0.1.0"
 edition = "2021"
+license = "Apache-2.0"
 
 [dependencies]
 aide = { version = "0.6", features = ["axum"] }
diff --git a/src/servers/src/context.rs b/src/servers/src/context.rs
index 5599e1a8e4bb..bf29b83841dc 100644
--- a/src/servers/src/context.rs
+++ b/src/servers/src/context.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashMap;
 use std::sync::Arc;
 
diff --git a/src/servers/src/error.rs b/src/servers/src/error.rs
index 51fc7e73f785..62b3d7a8146e 100644
--- a/src/servers/src/error.rs
+++ b/src/servers/src/error.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 use std::net::SocketAddr;
 
diff --git a/src/servers/src/grpc.rs b/src/servers/src/grpc.rs
index 97588f529248..5d56ddd36b72 100644
--- a/src/servers/src/grpc.rs
+++ b/src/servers/src/grpc.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod handler;
 
 use std::net::SocketAddr;
diff --git a/src/servers/src/grpc/handler.rs b/src/servers/src/grpc/handler.rs
index 3b96de603f0d..8ee4ce88aeb3 100644
--- a/src/servers/src/grpc/handler.rs
+++ b/src/servers/src/grpc/handler.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use api::v1::{AdminResponse, BatchRequest, BatchResponse, DatabaseResponse};
diff --git a/src/servers/src/http.rs b/src/servers/src/http.rs
index fc913ce28656..42e837c9caba 100644
--- a/src/servers/src/http.rs
+++ b/src/servers/src/http.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 mod context;
 pub mod handler;
 pub mod influxdb;
diff --git a/src/servers/src/http/context.rs b/src/servers/src/http/context.rs
index 8a2050a1a120..81b072d454b7 100644
--- a/src/servers/src/http/context.rs
+++ b/src/servers/src/http/context.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use axum::http;
 use axum::http::{Request, StatusCode};
 use axum::middleware::Next;
diff --git a/src/servers/src/http/handler.rs b/src/servers/src/http/handler.rs
index e819b5b8bf5e..69b41edd1b19 100644
--- a/src/servers/src/http/handler.rs
+++ b/src/servers/src/http/handler.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashMap;
 use std::time::Instant;
 
diff --git a/src/servers/src/http/influxdb.rs b/src/servers/src/http/influxdb.rs
index 5b8695e22630..06929eb3410c 100644
--- a/src/servers/src/http/influxdb.rs
+++ b/src/servers/src/http/influxdb.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashMap;
 
 use axum::extract::{Query, State};
diff --git a/src/servers/src/http/opentsdb.rs b/src/servers/src/http/opentsdb.rs
index 216077827a97..d47e26b44108 100644
--- a/src/servers/src/http/opentsdb.rs
+++ b/src/servers/src/http/opentsdb.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashMap;
 
 use axum::extract::{Query, RawBody, State};
diff --git a/src/servers/src/http/prometheus.rs b/src/servers/src/http/prometheus.rs
index 02a62973e741..6b37d23fc212 100644
--- a/src/servers/src/http/prometheus.rs
+++ b/src/servers/src/http/prometheus.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use api::prometheus::remote::{ReadRequest, WriteRequest};
 use axum::extract::{Query, RawBody, State};
 use axum::http::{header, StatusCode};
diff --git a/src/servers/src/http/script.rs b/src/servers/src/http/script.rs
index e1319bf24235..5b9e17b600ea 100644
--- a/src/servers/src/http/script.rs
+++ b/src/servers/src/http/script.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::time::Instant;
 
 use axum::extract::{Json, Query, RawBody, State};
diff --git a/src/servers/src/influxdb.rs b/src/servers/src/influxdb.rs
index c8e755600c4d..df1835efcd8c 100644
--- a/src/servers/src/influxdb.rs
+++ b/src/servers/src/influxdb.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashMap;
 
 use api::v1::insert_expr::{self, Expr};
diff --git a/src/servers/src/lib.rs b/src/servers/src/lib.rs
index d7ad934502b2..88579e2dafbc 100644
--- a/src/servers/src/lib.rs
+++ b/src/servers/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 #![feature(assert_matches)]
 
 pub mod context;
diff --git a/src/servers/src/line_writer.rs b/src/servers/src/line_writer.rs
index e11ede723c05..cbb2aff9873b 100644
--- a/src/servers/src/line_writer.rs
+++ b/src/servers/src/line_writer.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashMap;
 
 use common_catalog::consts::DEFAULT_CATALOG_NAME;
diff --git a/src/servers/src/mysql/federated.rs b/src/servers/src/mysql/federated.rs
index 0ae9fc2ba5c5..8aa3f369fe77 100644
--- a/src/servers/src/mysql/federated.rs
+++ b/src/servers/src/mysql/federated.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Use regex to filter out some MySQL federated components' emitted statements.
 //! Inspired by Databend's "[mysql_federated.rs](https://github.com/datafuselabs/databend/blob/ac706bf65845e6895141c96c0a10bad6fdc2d367/src/query/service/src/servers/mysql/mysql_federated.rs)".
 
diff --git a/src/servers/src/mysql/handler.rs b/src/servers/src/mysql/handler.rs
index d200e306d8b4..ce77d952cc29 100644
--- a/src/servers/src/mysql/handler.rs
+++ b/src/servers/src/mysql/handler.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::io;
 use std::sync::Arc;
 
diff --git a/src/servers/src/mysql/mod.rs b/src/servers/src/mysql/mod.rs
index d1df54151c20..f22f169a1c54 100644
--- a/src/servers/src/mysql/mod.rs
+++ b/src/servers/src/mysql/mod.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 mod federated;
 pub mod handler;
 pub mod server;
diff --git a/src/servers/src/mysql/server.rs b/src/servers/src/mysql/server.rs
index 03159f3181f3..e8064d20f1fc 100644
--- a/src/servers/src/mysql/server.rs
+++ b/src/servers/src/mysql/server.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::future::Future;
 use std::net::SocketAddr;
 use std::sync::Arc;
diff --git a/src/servers/src/mysql/writer.rs b/src/servers/src/mysql/writer.rs
index f34afa765bdf..66e4278687d6 100644
--- a/src/servers/src/mysql/writer.rs
+++ b/src/servers/src/mysql/writer.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::io;
 use std::ops::Deref;
 
diff --git a/src/servers/src/opentsdb.rs b/src/servers/src/opentsdb.rs
index 9129a2c66915..dbe0fb601a12 100644
--- a/src/servers/src/opentsdb.rs
+++ b/src/servers/src/opentsdb.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod codec;
 pub mod connection;
 mod handler;
diff --git a/src/servers/src/opentsdb/codec.rs b/src/servers/src/opentsdb/codec.rs
index 7871f7e05798..2253fd7e6363 100644
--- a/src/servers/src/opentsdb/codec.rs
+++ b/src/servers/src/opentsdb/codec.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashMap;
 
 use api::v1::codec::InsertBatch;
diff --git a/src/servers/src/opentsdb/connection.rs b/src/servers/src/opentsdb/connection.rs
index 3ef2b099e058..a1657259fc59 100644
--- a/src/servers/src/opentsdb/connection.rs
+++ b/src/servers/src/opentsdb/connection.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Modified from Tokio's mini-redis example.
 
 use bytes::{Buf, BytesMut};
diff --git a/src/servers/src/opentsdb/handler.rs b/src/servers/src/opentsdb/handler.rs
index 280315cac4df..471b784edc7e 100644
--- a/src/servers/src/opentsdb/handler.rs
+++ b/src/servers/src/opentsdb/handler.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Modified from Tokio's mini-redis example.
 
 use tokio::io::{AsyncRead, AsyncWrite};
diff --git a/src/servers/src/postgres/auth_handler.rs b/src/servers/src/postgres/auth_handler.rs
index 6e279d5911db..c17053bfa143 100644
--- a/src/servers/src/postgres/auth_handler.rs
+++ b/src/servers/src/postgres/auth_handler.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashMap;
 use std::fmt::Debug;
 
diff --git a/src/servers/src/postgres/handler.rs b/src/servers/src/postgres/handler.rs
index 88d86a38654d..59c6cc2ea873 100644
--- a/src/servers/src/postgres/handler.rs
+++ b/src/servers/src/postgres/handler.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::ops::Deref;
 
 use async_trait::async_trait;
diff --git a/src/servers/src/postgres/mod.rs b/src/servers/src/postgres/mod.rs
index fe38358555d4..46a02e7fc152 100644
--- a/src/servers/src/postgres/mod.rs
+++ b/src/servers/src/postgres/mod.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 mod auth_handler;
 mod handler;
 mod server;
diff --git a/src/servers/src/postgres/server.rs b/src/servers/src/postgres/server.rs
index 024ae154f2e1..61adc65d6375 100644
--- a/src/servers/src/postgres/server.rs
+++ b/src/servers/src/postgres/server.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::future::Future;
 use std::net::SocketAddr;
 use std::sync::Arc;
diff --git a/src/servers/src/prometheus.rs b/src/servers/src/prometheus.rs
index 485201869249..7e18b1d29af6 100644
--- a/src/servers/src/prometheus.rs
+++ b/src/servers/src/prometheus.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! promethues protcol supportings
 use std::cmp::Ordering;
 use std::collections::{BTreeMap, HashMap};
diff --git a/src/servers/src/query_handler.rs b/src/servers/src/query_handler.rs
index ec9f87dbbfcc..ff76bebdc5ad 100644
--- a/src/servers/src/query_handler.rs
+++ b/src/servers/src/query_handler.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use api::prometheus::remote::{ReadRequest, WriteRequest};
diff --git a/src/servers/src/server.rs b/src/servers/src/server.rs
index d4927a1e7303..7f4fd4919b44 100644
--- a/src/servers/src/server.rs
+++ b/src/servers/src/server.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::net::SocketAddr;
 use std::sync::Arc;
 
diff --git a/src/servers/src/shutdown.rs b/src/servers/src/shutdown.rs
index 6ae90c7de93d..f31810ef0486 100644
--- a/src/servers/src/shutdown.rs
+++ b/src/servers/src/shutdown.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Copied from tokio's mini-redis example.
 
 use tokio::sync::broadcast;
diff --git a/src/servers/tests/http/http_handler_test.rs b/src/servers/tests/http/http_handler_test.rs
index 1420967184cb..ddec8eca549b 100644
--- a/src/servers/tests/http/http_handler_test.rs
+++ b/src/servers/tests/http/http_handler_test.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashMap;
 
 use axum::body::Body;
diff --git a/src/servers/tests/http/influxdb_test.rs b/src/servers/tests/http/influxdb_test.rs
index a0caac34f0b0..24a21716cfe5 100644
--- a/src/servers/tests/http/influxdb_test.rs
+++ b/src/servers/tests/http/influxdb_test.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use api::v1::InsertExpr;
diff --git a/src/servers/tests/http/mod.rs b/src/servers/tests/http/mod.rs
index 12c71e5d4724..3ffba21daadc 100644
--- a/src/servers/tests/http/mod.rs
+++ b/src/servers/tests/http/mod.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 mod http_handler_test;
 mod influxdb_test;
 mod opentsdb_test;
diff --git a/src/servers/tests/http/opentsdb_test.rs b/src/servers/tests/http/opentsdb_test.rs
index 4e83dc349135..f66281302e11 100644
--- a/src/servers/tests/http/opentsdb_test.rs
+++ b/src/servers/tests/http/opentsdb_test.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use async_trait::async_trait;
diff --git a/src/servers/tests/http/prometheus_test.rs b/src/servers/tests/http/prometheus_test.rs
index 05c26623dbc3..a5a3274dc5ba 100644
--- a/src/servers/tests/http/prometheus_test.rs
+++ b/src/servers/tests/http/prometheus_test.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use api::prometheus::remote::{
diff --git a/src/servers/tests/mod.rs b/src/servers/tests/mod.rs
index 4b27848bee7f..a5663dddd18c 100644
--- a/src/servers/tests/mod.rs
+++ b/src/servers/tests/mod.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashMap;
 use std::sync::{Arc, RwLock};
 
diff --git a/src/servers/tests/mysql/mod.rs b/src/servers/tests/mysql/mod.rs
index 7f69ec38d0a7..aba8699087a9 100644
--- a/src/servers/tests/mysql/mod.rs
+++ b/src/servers/tests/mysql/mod.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use datatypes::prelude::*;
diff --git a/src/servers/tests/mysql/mysql_server_test.rs b/src/servers/tests/mysql/mysql_server_test.rs
index 1c3f365d8a74..ce351fce6b2b 100644
--- a/src/servers/tests/mysql/mysql_server_test.rs
+++ b/src/servers/tests/mysql/mysql_server_test.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::net::SocketAddr;
 use std::sync::Arc;
 use std::time::Duration;
diff --git a/src/servers/tests/mysql/mysql_writer_test.rs b/src/servers/tests/mysql/mysql_writer_test.rs
index 392711b425c2..9d9d1060c8a7 100644
--- a/src/servers/tests/mysql/mysql_writer_test.rs
+++ b/src/servers/tests/mysql/mysql_writer_test.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use datatypes::prelude::*;
diff --git a/src/servers/tests/opentsdb.rs b/src/servers/tests/opentsdb.rs
index 3caed762d0de..12c08ec89ab7 100644
--- a/src/servers/tests/opentsdb.rs
+++ b/src/servers/tests/opentsdb.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::net::SocketAddr;
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::Arc;
diff --git a/src/servers/tests/postgres/mod.rs b/src/servers/tests/postgres/mod.rs
index 8789b5e4e446..bbbe88ee7848 100644
--- a/src/servers/tests/postgres/mod.rs
+++ b/src/servers/tests/postgres/mod.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::net::SocketAddr;
 use std::sync::Arc;
 use std::time::Duration;
diff --git a/src/sql/Cargo.toml b/src/sql/Cargo.toml
index c2a1697a8696..457bb988771a 100644
--- a/src/sql/Cargo.toml
+++ b/src/sql/Cargo.toml
@@ -2,7 +2,7 @@
 name = "sql"
 version = "0.1.0"
 edition = "2021"
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+license = "Apache-2.0"
 
 [dependencies]
 api = { path = "../api" }
diff --git a/src/sql/src/ast.rs b/src/sql/src/ast.rs
index bd28b1fcb420..11636df8c078 100644
--- a/src/sql/src/ast.rs
+++ b/src/sql/src/ast.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub use sqlparser::ast::{
     ColumnDef, ColumnOption, ColumnOptionDef, DataType, Expr, Function, FunctionArg,
     FunctionArgExpr, Ident, ObjectName, SqlOption, TableConstraint, Value,
diff --git a/src/sql/src/dialect.rs b/src/sql/src/dialect.rs
index 20e141877ced..534f438c99a0 100644
--- a/src/sql/src/dialect.rs
+++ b/src/sql/src/dialect.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 // todo(hl) wrap sqlparser dialects
 
 pub use sqlparser::dialect::{Dialect, GenericDialect};
diff --git a/src/sql/src/error.rs b/src/sql/src/error.rs
index 26c5dd741cb4..a607a4273857 100644
--- a/src/sql/src/error.rs
+++ b/src/sql/src/error.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 
 use common_error::prelude::*;
diff --git a/src/sql/src/lib.rs b/src/sql/src/lib.rs
index 630a26a1eff9..331496586a2d 100644
--- a/src/sql/src/lib.rs
+++ b/src/sql/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 #![feature(assert_matches)]
 
 pub mod ast;
diff --git a/src/sql/src/parser.rs b/src/sql/src/parser.rs
index 5eceb83e4a7f..796f9816afcd 100644
--- a/src/sql/src/parser.rs
+++ b/src/sql/src/parser.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use snafu::{ensure, ResultExt};
 use sqlparser::dialect::Dialect;
 use sqlparser::keywords::Keyword;
diff --git a/src/sql/src/parsers.rs b/src/sql/src/parsers.rs
index e32ee1e6c33e..8feaa5020492 100644
--- a/src/sql/src/parsers.rs
+++ b/src/sql/src/parsers.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 mod alter_parser;
 pub(crate) mod create_parser;
 pub(crate) mod insert_parser;
diff --git a/src/sql/src/parsers/alter_parser.rs b/src/sql/src/parsers/alter_parser.rs
index 283dc2eea3b4..08661e1c1678 100644
--- a/src/sql/src/parsers/alter_parser.rs
+++ b/src/sql/src/parsers/alter_parser.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use snafu::ResultExt;
 use sqlparser::keywords::Keyword;
 use sqlparser::parser::ParserError;
diff --git a/src/sql/src/parsers/create_parser.rs b/src/sql/src/parsers/create_parser.rs
index e99bc52ba391..af52f12603c3 100644
--- a/src/sql/src/parsers/create_parser.rs
+++ b/src/sql/src/parsers/create_parser.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::cmp::Ordering;
 
 use itertools::Itertools;
diff --git a/src/sql/src/parsers/insert_parser.rs b/src/sql/src/parsers/insert_parser.rs
index 6d6800d8363f..43709407ad44 100644
--- a/src/sql/src/parsers/insert_parser.rs
+++ b/src/sql/src/parsers/insert_parser.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use snafu::ResultExt;
 use sqlparser::ast::Statement as SpStatement;
 
diff --git a/src/sql/src/parsers/query_parser.rs b/src/sql/src/parsers/query_parser.rs
index 603d60327280..e75642c79a08 100644
--- a/src/sql/src/parsers/query_parser.rs
+++ b/src/sql/src/parsers/query_parser.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use snafu::prelude::*;
 
 use crate::error::{self, Result};
diff --git a/src/sql/src/statements.rs b/src/sql/src/statements.rs
index 229323b2593f..9d24b5ebf0de 100644
--- a/src/sql/src/statements.rs
+++ b/src/sql/src/statements.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod alter;
 pub mod create;
 pub mod insert;
diff --git a/src/sql/src/statements/alter.rs b/src/sql/src/statements/alter.rs
index 8861fc02988c..a9dfaad8d9d5 100644
--- a/src/sql/src/statements/alter.rs
+++ b/src/sql/src/statements/alter.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use api::v1::{alter_expr, AddColumn, AlterExpr};
 use sqlparser::ast::{ColumnDef, ObjectName, TableConstraint};
 
diff --git a/src/sql/src/statements/create.rs b/src/sql/src/statements/create.rs
index 41d9ef92fcc3..01a7cb28cbbc 100644
--- a/src/sql/src/statements/create.rs
+++ b/src/sql/src/statements/create.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use crate::ast::{ColumnDef, Ident, ObjectName, SqlOption, TableConstraint, Value as SqlValue};
 
 /// Time index name, used in table constraints.
diff --git a/src/sql/src/statements/insert.rs b/src/sql/src/statements/insert.rs
index 89e88da221e9..e94e512d159e 100644
--- a/src/sql/src/statements/insert.rs
+++ b/src/sql/src/statements/insert.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use sqlparser::ast::{SetExpr, Statement, UnaryOperator, Values};
 use sqlparser::parser::ParserError;
 
diff --git a/src/sql/src/statements/query.rs b/src/sql/src/statements/query.rs
index 451b6eb64d60..64e115f1353e 100644
--- a/src/sql/src/statements/query.rs
+++ b/src/sql/src/statements/query.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use sqlparser::ast::Query as SpQuery;
 
 use crate::error::Error;
diff --git a/src/sql/src/statements/show.rs b/src/sql/src/statements/show.rs
index ae0f348a72cf..29b6d38baf70 100644
--- a/src/sql/src/statements/show.rs
+++ b/src/sql/src/statements/show.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::fmt;
 
 use crate::ast::{Expr, Ident};
diff --git a/src/sql/src/statements/statement.rs b/src/sql/src/statements/statement.rs
index 0d1582845b04..c4235be07c71 100644
--- a/src/sql/src/statements/statement.rs
+++ b/src/sql/src/statements/statement.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use sqlparser::ast::Statement as SpStatement;
 use sqlparser::parser::ParserError;
 
diff --git a/src/sql/src/statements/statement_query.rs b/src/sql/src/statements/statement_query.rs
index ec4315b91aba..2d530f10d359 100644
--- a/src/sql/src/statements/statement_query.rs
+++ b/src/sql/src/statements/statement_query.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use sqlparser::ast::Query as SpQuery;
 
 use crate::errors::ParserError;
diff --git a/src/storage/Cargo.toml b/src/storage/Cargo.toml
index ccc0a48d0a89..94d106f69957 100644
--- a/src/storage/Cargo.toml
+++ b/src/storage/Cargo.toml
@@ -2,7 +2,7 @@
 name = "storage"
 version = "0.1.0"
 edition = "2021"
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+license = "Apache-2.0"
 
 [dependencies]
 arc-swap = "1.0"
diff --git a/src/storage/benches/bench_main.rs b/src/storage/benches/bench_main.rs
index cdaa4eec9012..3590d8de032c 100644
--- a/src/storage/benches/bench_main.rs
+++ b/src/storage/benches/bench_main.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use criterion::criterion_main;
 
 mod memtable;
diff --git a/src/storage/benches/memtable/bench_memtable_read.rs b/src/storage/benches/memtable/bench_memtable_read.rs
index 9a75224534d1..4ca030f50e29 100644
--- a/src/storage/benches/memtable/bench_memtable_read.rs
+++ b/src/storage/benches/memtable/bench_memtable_read.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use criterion::{criterion_group, criterion_main, Criterion, Throughput};
 
 use crate::memtable::generate_kvs;
diff --git a/src/storage/benches/memtable/bench_memtable_read_write_ratio.rs b/src/storage/benches/memtable/bench_memtable_read_write_ratio.rs
index 417e62e1711f..d9757b847102 100644
--- a/src/storage/benches/memtable/bench_memtable_read_write_ratio.rs
+++ b/src/storage/benches/memtable/bench_memtable_read_write_ratio.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
 use std::sync::Arc;
 use std::thread;
diff --git a/src/storage/benches/memtable/bench_memtable_write.rs b/src/storage/benches/memtable/bench_memtable_write.rs
index 4a5a2ecd5c9b..39fc1bbde782 100644
--- a/src/storage/benches/memtable/bench_memtable_write.rs
+++ b/src/storage/benches/memtable/bench_memtable_write.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use criterion::{criterion_group, criterion_main, Criterion, Throughput};
 
 use crate::memtable::generate_kvs;
diff --git a/src/storage/benches/memtable/mod.rs b/src/storage/benches/memtable/mod.rs
index 1582a76baaee..462c3edc28b5 100644
--- a/src/storage/benches/memtable/mod.rs
+++ b/src/storage/benches/memtable/mod.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod bench_memtable_read;
 pub mod bench_memtable_read_write_ratio;
 pub mod bench_memtable_write;
diff --git a/src/storage/benches/memtable/util/bench_context.rs b/src/storage/benches/memtable/util/bench_context.rs
index 2d682ec1b3dd..6d36f5abdd44 100644
--- a/src/storage/benches/memtable/util/bench_context.rs
+++ b/src/storage/benches/memtable/util/bench_context.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use storage::memtable::{IterContext, KeyValues, MemtableRef};
 
 use crate::memtable::util::new_memtable;
diff --git a/src/storage/benches/memtable/util/mod.rs b/src/storage/benches/memtable/util/mod.rs
index 410a935ee863..62b3ee8c3d96 100644
--- a/src/storage/benches/memtable/util/mod.rs
+++ b/src/storage/benches/memtable/util/mod.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod bench_context;
 pub mod regiondesc_util;
 pub mod schema_util;
diff --git a/src/storage/benches/memtable/util/regiondesc_util.rs b/src/storage/benches/memtable/util/regiondesc_util.rs
index 82ace380127c..51dcb8795ad5 100644
--- a/src/storage/benches/memtable/util/regiondesc_util.rs
+++ b/src/storage/benches/memtable/util/regiondesc_util.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use datatypes::prelude::ConcreteDataType;
 use store_api::storage::{
     ColumnDescriptor, ColumnDescriptorBuilder, ColumnFamilyDescriptorBuilder, ColumnId,
diff --git a/src/storage/benches/memtable/util/schema_util.rs b/src/storage/benches/memtable/util/schema_util.rs
index 04e15a15918e..0522bae825cc 100644
--- a/src/storage/benches/memtable/util/schema_util.rs
+++ b/src/storage/benches/memtable/util/schema_util.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use datatypes::prelude::*;
diff --git a/src/storage/benches/wal/bench_decode.rs b/src/storage/benches/wal/bench_decode.rs
index 5b4abb881511..f451407e9789 100644
--- a/src/storage/benches/wal/bench_decode.rs
+++ b/src/storage/benches/wal/bench_decode.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use criterion::{criterion_group, criterion_main, Criterion};
 use storage::codec::{Decoder, Encoder};
 use storage::write_batch::{codec, WriteBatch};
diff --git a/src/storage/benches/wal/bench_encode.rs b/src/storage/benches/wal/bench_encode.rs
index 040b8e326a7e..1abc46002f70 100644
--- a/src/storage/benches/wal/bench_encode.rs
+++ b/src/storage/benches/wal/bench_encode.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use criterion::{criterion_group, criterion_main, Criterion};
 use storage::codec::Encoder;
 use storage::write_batch::{codec, WriteBatch};
diff --git a/src/storage/benches/wal/bench_wal.rs b/src/storage/benches/wal/bench_wal.rs
index e0cca5ed86c5..67e76f2527b7 100644
--- a/src/storage/benches/wal/bench_wal.rs
+++ b/src/storage/benches/wal/bench_wal.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use criterion::{criterion_group, criterion_main, Criterion};
 use storage::codec::{Decoder, Encoder};
 use storage::write_batch::{codec, WriteBatch};
diff --git a/src/storage/benches/wal/mod.rs b/src/storage/benches/wal/mod.rs
index cac6d037f9b3..7966e66e0fcf 100644
--- a/src/storage/benches/wal/mod.rs
+++ b/src/storage/benches/wal/mod.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod bench_decode;
 pub mod bench_encode;
 pub mod bench_wal;
diff --git a/src/storage/benches/wal/util/mod.rs b/src/storage/benches/wal/util/mod.rs
index 5efa5cc64d46..47bd3766c098 100644
--- a/src/storage/benches/wal/util/mod.rs
+++ b/src/storage/benches/wal/util/mod.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod write_batch_util;
 
 use std::sync::Arc;
diff --git a/src/storage/benches/wal/util/write_batch_util.rs b/src/storage/benches/wal/util/write_batch_util.rs
index 8bcb167e0f34..b3743d5cc202 100644
--- a/src/storage/benches/wal/util/write_batch_util.rs
+++ b/src/storage/benches/wal/util/write_batch_util.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use storage::write_batch::WriteBatch;
 
 use crate::memtable::util::schema_util::{self, ColumnDef};
diff --git a/src/storage/build.rs b/src/storage/build.rs
index 04107376edd4..7397154783e3 100644
--- a/src/storage/build.rs
+++ b/src/storage/build.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 fn main() {
     tonic_build::configure()
         .compile(&["proto/wal.proto", "proto/write_batch.proto"], &["."])
diff --git a/src/storage/src/background.rs b/src/storage/src/background.rs
index 775c0aac1e6f..015c41382471 100644
--- a/src/storage/src/background.rs
+++ b/src/storage/src/background.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Background job management.
 
 use std::sync::atomic::{AtomicBool, Ordering};
diff --git a/src/storage/src/chunk.rs b/src/storage/src/chunk.rs
index 96bdabc196b0..f39f2db9c6ff 100644
--- a/src/storage/src/chunk.rs
+++ b/src/storage/src/chunk.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use async_trait::async_trait;
diff --git a/src/storage/src/codec.rs b/src/storage/src/codec.rs
index 691c69aa3db3..8dfe29482aa6 100644
--- a/src/storage/src/codec.rs
+++ b/src/storage/src/codec.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use common_error::prelude::ErrorExt;
 
 pub trait Encoder {
diff --git a/src/storage/src/config.rs b/src/storage/src/config.rs
index b1adf325e75e..3522790c3ec8 100644
--- a/src/storage/src/config.rs
+++ b/src/storage/src/config.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! storage engine config
 
 #[derive(Debug, Default, Clone)]
diff --git a/src/storage/src/engine.rs b/src/storage/src/engine.rs
index 6863d134206e..ac1588458e74 100644
--- a/src/storage/src/engine.rs
+++ b/src/storage/src/engine.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashMap;
 use std::sync::{Arc, RwLock};
 
diff --git a/src/storage/src/error.rs b/src/storage/src/error.rs
index 7de6a4e0b7db..d18054f6fb1e 100644
--- a/src/storage/src/error.rs
+++ b/src/storage/src/error.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 use std::io::Error as IoError;
 use std::str::Utf8Error;
diff --git a/src/storage/src/flush.rs b/src/storage/src/flush.rs
index fef253bf522d..9996919b3b8f 100644
--- a/src/storage/src/flush.rs
+++ b/src/storage/src/flush.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use async_trait::async_trait;
diff --git a/src/storage/src/lib.rs b/src/storage/src/lib.rs
index 769a1918517c..0c41d5b6785b 100644
--- a/src/storage/src/lib.rs
+++ b/src/storage/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Storage engine implementation.
 #![feature(map_first_last)]
 mod background;
diff --git a/src/storage/src/manifest.rs b/src/storage/src/manifest.rs
index ada6d31b2161..c9c740e18420 100644
--- a/src/storage/src/manifest.rs
+++ b/src/storage/src/manifest.rs
@@ -1,6 +1,19 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! manifest storage
 pub(crate) mod action;
-pub(crate) mod checkpoint;
 pub mod helper;
 mod impl_;
 pub mod region;
diff --git a/src/storage/src/manifest/action.rs b/src/storage/src/manifest/action.rs
index b28d195b05a1..6c53aaf94128 100644
--- a/src/storage/src/manifest/action.rs
+++ b/src/storage/src/manifest/action.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::io::{BufRead, BufReader};
 
 use serde::{Deserialize, Serialize};
diff --git a/src/storage/src/manifest/checkpoint.rs b/src/storage/src/manifest/checkpoint.rs
deleted file mode 100644
index 8b137891791f..000000000000
--- a/src/storage/src/manifest/checkpoint.rs
+++ /dev/null
@@ -1 +0,0 @@
-
diff --git a/src/storage/src/manifest/helper.rs b/src/storage/src/manifest/helper.rs
index eb9a0f6b6b70..1c68d1086299 100644
--- a/src/storage/src/manifest/helper.rs
+++ b/src/storage/src/manifest/helper.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::io::Write;
 
 use serde::Serialize;
diff --git a/src/storage/src/manifest/impl_.rs b/src/storage/src/manifest/impl_.rs
index 6f229fa47314..27947964336d 100644
--- a/src/storage/src/manifest/impl_.rs
+++ b/src/storage/src/manifest/impl_.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::marker::PhantomData;
 use std::sync::atomic::{AtomicU64, Ordering};
 use std::sync::Arc;
diff --git a/src/storage/src/manifest/region.rs b/src/storage/src/manifest/region.rs
index ce3763dfb27e..b56cd6aae87b 100644
--- a/src/storage/src/manifest/region.rs
+++ b/src/storage/src/manifest/region.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Region manifest impl
 use crate::manifest::action::*;
 use crate::manifest::ManifestImpl;
diff --git a/src/storage/src/manifest/storage.rs b/src/storage/src/manifest/storage.rs
index 06abcf6c058e..4edbd02a8199 100644
--- a/src/storage/src/manifest/storage.rs
+++ b/src/storage/src/manifest/storage.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashMap;
 use std::iter::Iterator;
 
diff --git a/src/storage/src/manifest/test_utils.rs b/src/storage/src/manifest/test_utils.rs
index 154165c7ff56..ab3fc7bb4994 100644
--- a/src/storage/src/manifest/test_utils.rs
+++ b/src/storage/src/manifest/test_utils.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use datatypes::type_id::LogicalTypeId;
 use store_api::storage::SequenceNumber;
 
diff --git a/src/storage/src/memtable.rs b/src/storage/src/memtable.rs
index 846a5a3ead0e..101e10544f4d 100644
--- a/src/storage/src/memtable.rs
+++ b/src/storage/src/memtable.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 mod btree;
 mod inserter;
 #[cfg(test)]
diff --git a/src/storage/src/memtable/btree.rs b/src/storage/src/memtable/btree.rs
index 4fe96d28b9fc..a06c6ee5a7b7 100644
--- a/src/storage/src/memtable/btree.rs
+++ b/src/storage/src/memtable/btree.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::cmp::Ordering;
 use std::collections::{btree_map, BTreeMap};
 use std::ops::Bound;
diff --git a/src/storage/src/memtable/inserter.rs b/src/storage/src/memtable/inserter.rs
index 64d6f9e8dda0..6f0ea70b0fa2 100644
--- a/src/storage/src/memtable/inserter.rs
+++ b/src/storage/src/memtable/inserter.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use datatypes::vectors::VectorRef;
 use snafu::OptionExt;
 use store_api::storage::{ColumnDescriptor, OpType, SequenceNumber};
diff --git a/src/storage/src/memtable/tests.rs b/src/storage/src/memtable/tests.rs
index 4f5d773b3e29..d51cc844ca01 100644
--- a/src/storage/src/memtable/tests.rs
+++ b/src/storage/src/memtable/tests.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use common_time::timestamp::Timestamp;
 use datatypes::arrow;
 use datatypes::arrow::array::{Int64Array, PrimitiveArray, UInt64Array, UInt8Array};
diff --git a/src/storage/src/memtable/version.rs b/src/storage/src/memtable/version.rs
index f6f764f64db2..cce626677c66 100644
--- a/src/storage/src/memtable/version.rs
+++ b/src/storage/src/memtable/version.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::cmp::Ordering;
 
 use common_time::RangeMillis;
diff --git a/src/storage/src/metadata.rs b/src/storage/src/metadata.rs
index 580327b6d2fe..3808f4f14ff1 100644
--- a/src/storage/src/metadata.rs
+++ b/src/storage/src/metadata.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::{HashMap, HashSet};
 use std::num::ParseIntError;
 use std::str::FromStr;
diff --git a/src/storage/src/proto.rs b/src/storage/src/proto.rs
index f047bdd16c90..6aa66c03a0bf 100644
--- a/src/storage/src/proto.rs
+++ b/src/storage/src/proto.rs
@@ -1,2 +1,16 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod wal;
 pub mod write_batch;
diff --git a/src/storage/src/proto/wal.rs b/src/storage/src/proto/wal.rs
index 557f772525db..f410fb6639b9 100644
--- a/src/storage/src/proto/wal.rs
+++ b/src/storage/src/proto/wal.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 #![allow(clippy::all)]
 tonic::include_proto!("greptime.storage.wal.v1");
 
diff --git a/src/storage/src/proto/write_batch.rs b/src/storage/src/proto/write_batch.rs
index a0885be45cd1..7d5ef21aedb2 100644
--- a/src/storage/src/proto/write_batch.rs
+++ b/src/storage/src/proto/write_batch.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 #![allow(clippy::all)]
 tonic::include_proto!("greptime.storage.write_batch.v1");
 
diff --git a/src/storage/src/read.rs b/src/storage/src/read.rs
index 616d130a82ab..6893060be7c5 100644
--- a/src/storage/src/read.rs
+++ b/src/storage/src/read.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Common structs and utilities for read.
 
 mod dedup;
diff --git a/src/storage/src/read/dedup.rs b/src/storage/src/read/dedup.rs
index 95b3a4470328..30e3c2b24ea0 100644
--- a/src/storage/src/read/dedup.rs
+++ b/src/storage/src/read/dedup.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use async_trait::async_trait;
 use datatypes::arrow::bitmap::MutableBitmap;
 use datatypes::vectors::BooleanVector;
diff --git a/src/storage/src/read/merge.rs b/src/storage/src/read/merge.rs
index a62014183016..75c5d112dd22 100644
--- a/src/storage/src/read/merge.rs
+++ b/src/storage/src/read/merge.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Merge reader.
 //!
 //! The implementation of [`MergeReader`] is inspired by
diff --git a/src/storage/src/region.rs b/src/storage/src/region.rs
index 1ee1364f5016..4a44f94f89ab 100644
--- a/src/storage/src/region.rs
+++ b/src/storage/src/region.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 #[cfg(test)]
 mod tests;
 mod writer;
diff --git a/src/storage/src/region/tests.rs b/src/storage/src/region/tests.rs
index c76c5d3ad215..57357f2da0d8 100644
--- a/src/storage/src/region/tests.rs
+++ b/src/storage/src/region/tests.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Region tests.
 
 mod alter;
diff --git a/src/storage/src/region/tests/alter.rs b/src/storage/src/region/tests/alter.rs
index 5cff8fba3914..3ab273f1bbce 100644
--- a/src/storage/src/region/tests/alter.rs
+++ b/src/storage/src/region/tests/alter.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::BTreeMap;
 use std::sync::Arc;
 
diff --git a/src/storage/src/region/tests/basic.rs b/src/storage/src/region/tests/basic.rs
index 3265209f8c71..c5352669a5b9 100644
--- a/src/storage/src/region/tests/basic.rs
+++ b/src/storage/src/region/tests/basic.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Region read/write tests.
 
 use log_store::fs::log::LocalFileLogStore;
diff --git a/src/storage/src/region/tests/flush.rs b/src/storage/src/region/tests/flush.rs
index fdf4e2528d32..eadb4d5b5b4d 100644
--- a/src/storage/src/region/tests/flush.rs
+++ b/src/storage/src/region/tests/flush.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Region flush tests.
 
 use std::sync::atomic::{AtomicBool, Ordering};
diff --git a/src/storage/src/region/tests/projection.rs b/src/storage/src/region/tests/projection.rs
index 72a5d0e2c585..d607f4113305 100644
--- a/src/storage/src/region/tests/projection.rs
+++ b/src/storage/src/region/tests/projection.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use datatypes::data_type::ConcreteDataType;
diff --git a/src/storage/src/region/writer.rs b/src/storage/src/region/writer.rs
index 34accb1401b4..be4095fefdcb 100644
--- a/src/storage/src/region/writer.rs
+++ b/src/storage/src/region/writer.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use common_telemetry::logging;
diff --git a/src/storage/src/schema.rs b/src/storage/src/schema.rs
index 12ab495d2c1f..6bc344f3a701 100644
--- a/src/storage/src/schema.rs
+++ b/src/storage/src/schema.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod compat;
 mod projected;
 mod region;
diff --git a/src/storage/src/schema/compat.rs b/src/storage/src/schema/compat.rs
index 4fcd9210dd27..5e1c22cd773f 100644
--- a/src/storage/src/schema/compat.rs
+++ b/src/storage/src/schema/compat.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Utilities for resolving schema compatibility problems.
 
 use std::sync::Arc;
diff --git a/src/storage/src/schema/projected.rs b/src/storage/src/schema/projected.rs
index a57fb1aab32e..ec940a9d3485 100644
--- a/src/storage/src/schema/projected.rs
+++ b/src/storage/src/schema/projected.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::cmp::Ordering;
 use std::collections::{BTreeSet, HashMap};
 use std::sync::Arc;
diff --git a/src/storage/src/schema/region.rs b/src/storage/src/schema/region.rs
index 6e67c5a55cb1..bfc046c868ed 100644
--- a/src/storage/src/schema/region.rs
+++ b/src/storage/src/schema/region.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use common_error::prelude::*;
diff --git a/src/storage/src/schema/store.rs b/src/storage/src/schema/store.rs
index b706540fc034..681059b256d8 100644
--- a/src/storage/src/schema/store.rs
+++ b/src/storage/src/schema/store.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use common_error::prelude::*;
diff --git a/src/storage/src/snapshot.rs b/src/storage/src/snapshot.rs
index c7177f926d34..32d030ba8e12 100644
--- a/src/storage/src/snapshot.rs
+++ b/src/storage/src/snapshot.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::cmp;
 
 use async_trait::async_trait;
diff --git a/src/storage/src/sst.rs b/src/storage/src/sst.rs
index 3d2123bdb6d2..273841809e16 100644
--- a/src/storage/src/sst.rs
+++ b/src/storage/src/sst.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 mod parquet;
 
 use std::sync::Arc;
diff --git a/src/storage/src/sst/parquet.rs b/src/storage/src/sst/parquet.rs
index f96b9129e551..1864cd6bcbf9 100644
--- a/src/storage/src/sst/parquet.rs
+++ b/src/storage/src/sst/parquet.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Parquet sst format.
 
 use std::collections::HashMap;
diff --git a/src/storage/src/sync.rs b/src/storage/src/sync.rs
index 7408db7d9448..5f1164c1468c 100644
--- a/src/storage/src/sync.rs
+++ b/src/storage/src/sync.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Synchronization utilities
 
 use std::ops::{Deref, DerefMut};
diff --git a/src/storage/src/test_util.rs b/src/storage/src/test_util.rs
index 7b67ac4886ce..a24f7b2430f2 100644
--- a/src/storage/src/test_util.rs
+++ b/src/storage/src/test_util.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod config_util;
 pub mod descriptor_util;
 pub mod read_util;
diff --git a/src/storage/src/test_util/config_util.rs b/src/storage/src/test_util/config_util.rs
index 829c4873e863..451c47818839 100644
--- a/src/storage/src/test_util/config_util.rs
+++ b/src/storage/src/test_util/config_util.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use log_store::fs::config::LogConfig;
diff --git a/src/storage/src/test_util/descriptor_util.rs b/src/storage/src/test_util/descriptor_util.rs
index 21f18826a85b..50c8c2613e15 100644
--- a/src/storage/src/test_util/descriptor_util.rs
+++ b/src/storage/src/test_util/descriptor_util.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use datatypes::prelude::ConcreteDataType;
 use datatypes::type_id::LogicalTypeId;
 use store_api::storage::{
diff --git a/src/storage/src/test_util/read_util.rs b/src/storage/src/test_util/read_util.rs
index b15b43a00421..1b62611dc610 100644
--- a/src/storage/src/test_util/read_util.rs
+++ b/src/storage/src/test_util/read_util.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use async_trait::async_trait;
diff --git a/src/storage/src/test_util/schema_util.rs b/src/storage/src/test_util/schema_util.rs
index ea2a3d379d02..61b4621f14a3 100644
--- a/src/storage/src/test_util/schema_util.rs
+++ b/src/storage/src/test_util/schema_util.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use datatypes::prelude::*;
diff --git a/src/storage/src/test_util/write_batch_util.rs b/src/storage/src/test_util/write_batch_util.rs
index 5d56b3080e82..baace780395f 100644
--- a/src/storage/src/test_util/write_batch_util.rs
+++ b/src/storage/src/test_util/write_batch_util.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use crate::test_util::schema_util::{self, ColumnDef};
 use crate::write_batch::WriteBatch;
 
diff --git a/src/storage/src/version.rs b/src/storage/src/version.rs
index bf42615e2357..67b43fef485c 100644
--- a/src/storage/src/version.rs
+++ b/src/storage/src/version.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Version control of storage.
 //!
 //! To read latest data from `VersionControl`, we need to
diff --git a/src/storage/src/wal.rs b/src/storage/src/wal.rs
index 3a5ed29bdc70..acd5baca63f8 100644
--- a/src/storage/src/wal.rs
+++ b/src/storage/src/wal.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::pin::Pin;
 use std::sync::Arc;
 
diff --git a/src/storage/src/write_batch.rs b/src/storage/src/write_batch.rs
index 87883d3f6ede..10d66bcd25b1 100644
--- a/src/storage/src/write_batch.rs
+++ b/src/storage/src/write_batch.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 mod compat;
 
 use std::any::Any;
diff --git a/src/storage/src/write_batch/compat.rs b/src/storage/src/write_batch/compat.rs
index e8044a7d6463..dcd9d155c33b 100644
--- a/src/storage/src/write_batch/compat.rs
+++ b/src/storage/src/write_batch/compat.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use datatypes::schema::{ColumnSchema, SchemaRef};
 use snafu::{ensure, ResultExt};
 
diff --git a/src/store-api/Cargo.toml b/src/store-api/Cargo.toml
index 666b0814077b..d3bd1ecb76d8 100644
--- a/src/store-api/Cargo.toml
+++ b/src/store-api/Cargo.toml
@@ -2,7 +2,7 @@
 name = "store-api"
 version = "0.1.0"
 edition = "2021"
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+license = "Apache-2.0"
 
 [dependencies]
 async-trait = "0.1"
diff --git a/src/store-api/src/lib.rs b/src/store-api/src/lib.rs
index ab381487f055..080e87a83ae9 100644
--- a/src/store-api/src/lib.rs
+++ b/src/store-api/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Storage related APIs
 pub mod logstore;
 pub mod manifest;
diff --git a/src/store-api/src/logstore.rs b/src/store-api/src/logstore.rs
index 390b33ab2ca5..effe838d4414 100644
--- a/src/store-api/src/logstore.rs
+++ b/src/store-api/src/logstore.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! LogStore APIs.
 
 use common_error::prelude::ErrorExt;
diff --git a/src/store-api/src/logstore/entry.rs b/src/store-api/src/logstore/entry.rs
index 4ed9e8f565ec..3fa7aad06d22 100644
--- a/src/store-api/src/logstore/entry.rs
+++ b/src/store-api/src/logstore/entry.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use common_base::buffer::{Buffer, BufferMut};
 use common_error::ext::ErrorExt;
 
diff --git a/src/store-api/src/logstore/entry_stream.rs b/src/store-api/src/logstore/entry_stream.rs
index fb9639371389..6d9cfa9c8e99 100644
--- a/src/store-api/src/logstore/entry_stream.rs
+++ b/src/store-api/src/logstore/entry_stream.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::pin::Pin;
 
 use common_error::prelude::ErrorExt;
diff --git a/src/store-api/src/logstore/namespace.rs b/src/store-api/src/logstore/namespace.rs
index be12aa43ea18..bf71ca4641f5 100644
--- a/src/store-api/src/logstore/namespace.rs
+++ b/src/store-api/src/logstore/namespace.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub type Id = u64;
 
 pub trait Namespace: Send + Sync + Clone + std::fmt::Debug {
diff --git a/src/store-api/src/manifest.rs b/src/store-api/src/manifest.rs
index 1f1515f5aae9..105c1ada95b3 100644
--- a/src/store-api/src/manifest.rs
+++ b/src/store-api/src/manifest.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! metadata service
 pub mod action;
 mod storage;
diff --git a/src/store-api/src/manifest/action.rs b/src/store-api/src/manifest/action.rs
index 3675762c1679..a777004dfa2f 100644
--- a/src/store-api/src/manifest/action.rs
+++ b/src/store-api/src/manifest/action.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 ///! Common actions for manifest
 use serde::{Deserialize, Serialize};
 
diff --git a/src/store-api/src/manifest/storage.rs b/src/store-api/src/manifest/storage.rs
index 4ac7bec50ce5..5150fc6d6adb 100644
--- a/src/store-api/src/manifest/storage.rs
+++ b/src/store-api/src/manifest/storage.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use async_trait::async_trait;
 use common_error::ext::ErrorExt;
 
diff --git a/src/store-api/src/storage.rs b/src/store-api/src/storage.rs
index ff7169a01acc..154c99b385b9 100644
--- a/src/store-api/src/storage.rs
+++ b/src/store-api/src/storage.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Storage APIs.
 
 mod chunk;
diff --git a/src/store-api/src/storage/chunk.rs b/src/store-api/src/storage/chunk.rs
index 1c438253301a..ca7a8e1736c7 100644
--- a/src/store-api/src/storage/chunk.rs
+++ b/src/store-api/src/storage/chunk.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use async_trait::async_trait;
 use common_error::ext::ErrorExt;
 use datatypes::vectors::VectorRef;
diff --git a/src/store-api/src/storage/consts.rs b/src/store-api/src/storage/consts.rs
index 70473973fbab..68352b14ca50 100644
--- a/src/store-api/src/storage/consts.rs
+++ b/src/store-api/src/storage/consts.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Constants.
 
 use crate::storage::descriptors::{ColumnFamilyId, ColumnId};
diff --git a/src/store-api/src/storage/descriptors.rs b/src/store-api/src/storage/descriptors.rs
index 7fa50f6e1df7..994223928697 100644
--- a/src/store-api/src/storage/descriptors.rs
+++ b/src/store-api/src/storage/descriptors.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use derive_builder::Builder;
 use serde::{Deserialize, Serialize};
 
diff --git a/src/store-api/src/storage/engine.rs b/src/store-api/src/storage/engine.rs
index e9bdc27eaf45..651c422cb5fd 100644
--- a/src/store-api/src/storage/engine.rs
+++ b/src/store-api/src/storage/engine.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Storage Engine traits.
 //!
 //! [`StorageEngine`] is the abstraction over a multi-regions, schematized data storage system,
diff --git a/src/store-api/src/storage/metadata.rs b/src/store-api/src/storage/metadata.rs
index bf2ef6537e49..67dfb30f5b25 100644
--- a/src/store-api/src/storage/metadata.rs
+++ b/src/store-api/src/storage/metadata.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use crate::storage::SchemaRef;
 
 /// Metadata of a region.
diff --git a/src/store-api/src/storage/region.rs b/src/store-api/src/storage/region.rs
index c223f927e559..236b6681d46f 100644
--- a/src/store-api/src/storage/region.rs
+++ b/src/store-api/src/storage/region.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Region holds chunks of rows stored in the storage engine, but does not require that
 //! rows must have continuous primary key range, which is implementation specific.
 //!
diff --git a/src/store-api/src/storage/requests.rs b/src/store-api/src/storage/requests.rs
index aac0b415d61e..6e7184810a5e 100644
--- a/src/store-api/src/storage/requests.rs
+++ b/src/store-api/src/storage/requests.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashSet;
 use std::time::Duration;
 
diff --git a/src/store-api/src/storage/responses.rs b/src/store-api/src/storage/responses.rs
index 7cd094abfffc..d5fe32669db4 100644
--- a/src/store-api/src/storage/responses.rs
+++ b/src/store-api/src/storage/responses.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 #[derive(Debug)]
 pub struct WriteResponse {}
 
diff --git a/src/store-api/src/storage/snapshot.rs b/src/store-api/src/storage/snapshot.rs
index 7761c69c4d9e..0532c9948395 100644
--- a/src/store-api/src/storage/snapshot.rs
+++ b/src/store-api/src/storage/snapshot.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use async_trait::async_trait;
 use common_error::ext::ErrorExt;
 use datatypes::schema::SchemaRef;
diff --git a/src/store-api/src/storage/types.rs b/src/store-api/src/storage/types.rs
index b88805e61762..ecca8e4f6467 100644
--- a/src/store-api/src/storage/types.rs
+++ b/src/store-api/src/storage/types.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Common types.
 
 /// Represents a sequence number of data in storage. The offset of logstore can be used
diff --git a/src/table-engine/Cargo.toml b/src/table-engine/Cargo.toml
index 7bb20fc5a4fc..3a81c782bde9 100644
--- a/src/table-engine/Cargo.toml
+++ b/src/table-engine/Cargo.toml
@@ -2,6 +2,7 @@
 name = "table-engine"
 version = "0.1.0"
 edition = "2021"
+license = "Apache-2.0"
 
 [features]
 default = []
@@ -18,7 +19,9 @@ common-query = { path = "../common/query" }
 common-recordbatch = { path = "../common/recordbatch" }
 common-telemetry = { path = "../common/telemetry" }
 common-time = { path = "../common/time" }
-datafusion = { git = "https://github.com/apache/arrow-datafusion.git", branch = "arrow2", features = ["simd"] }
+datafusion = { git = "https://github.com/apache/arrow-datafusion.git", branch = "arrow2", features = [
+    "simd",
+] }
 datafusion-common = { git = "https://github.com/apache/arrow-datafusion.git", branch = "arrow2" }
 datatypes = { path = "../datatypes" }
 futures = "0.3"
diff --git a/src/table-engine/src/config.rs b/src/table-engine/src/config.rs
index 335fce406980..4bac9a52abbb 100644
--- a/src/table-engine/src/config.rs
+++ b/src/table-engine/src/config.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Table Engine config
 
 #[derive(Debug, Clone, Default)]
diff --git a/src/table-engine/src/engine.rs b/src/table-engine/src/engine.rs
index 43e56616ba95..29e2f09c74d3 100644
--- a/src/table-engine/src/engine.rs
+++ b/src/table-engine/src/engine.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashMap;
 use std::sync::{Arc, RwLock};
 
diff --git a/src/table-engine/src/error.rs b/src/table-engine/src/error.rs
index 13035742f9f9..ff3321ef7a26 100644
--- a/src/table-engine/src/error.rs
+++ b/src/table-engine/src/error.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 
 use common_error::ext::BoxedError;
diff --git a/src/table-engine/src/lib.rs b/src/table-engine/src/lib.rs
index 462396858a75..ec2fb53785fe 100644
--- a/src/table-engine/src/lib.rs
+++ b/src/table-engine/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod config;
 pub mod engine;
 pub mod error;
diff --git a/src/table-engine/src/manifest.rs b/src/table-engine/src/manifest.rs
index 522ed3206c96..1de7148c23e7 100644
--- a/src/table-engine/src/manifest.rs
+++ b/src/table-engine/src/manifest.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Table manifest service
 pub mod action;
 
diff --git a/src/table-engine/src/manifest/action.rs b/src/table-engine/src/manifest/action.rs
index a0711aff9242..f8428367d463 100644
--- a/src/table-engine/src/manifest/action.rs
+++ b/src/table-engine/src/manifest/action.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::io::{BufRead, BufReader};
 
 use serde::{Deserialize, Serialize};
diff --git a/src/table-engine/src/table.rs b/src/table-engine/src/table.rs
index 0d2ce8de1424..705b8b035624 100644
--- a/src/table-engine/src/table.rs
+++ b/src/table-engine/src/table.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 #[cfg(any(test, feature = "test"))]
 pub mod test_util;
 
diff --git a/src/table-engine/src/table/test_util.rs b/src/table-engine/src/table/test_util.rs
index 15f6c063463d..80f736c26dbe 100644
--- a/src/table-engine/src/table/test_util.rs
+++ b/src/table-engine/src/table/test_util.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 mod mock_engine;
 use std::collections::HashMap;
 use std::sync::Arc;
diff --git a/src/table-engine/src/table/test_util/mock_engine.rs b/src/table-engine/src/table/test_util/mock_engine.rs
index 6972c27d4b52..08b137cdc7c4 100644
--- a/src/table-engine/src/table/test_util/mock_engine.rs
+++ b/src/table-engine/src/table/test_util/mock_engine.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! A mock storage engine for table test purpose.
 
 use std::collections::HashMap;
diff --git a/src/table/Cargo.toml b/src/table/Cargo.toml
index 41ef7c815f9b..0d0d352cd7ff 100644
--- a/src/table/Cargo.toml
+++ b/src/table/Cargo.toml
@@ -2,6 +2,7 @@
 name = "table"
 version = "0.1.0"
 edition = "2021"
+license = "Apache-2.0"
 
 [dependencies]
 async-trait = "0.1"
diff --git a/src/table/src/engine.rs b/src/table/src/engine.rs
index a2ed36bbc7b5..d2983e547ba3 100644
--- a/src/table/src/engine.rs
+++ b/src/table/src/engine.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::fmt::{self, Display};
 use std::sync::Arc;
 
diff --git a/src/table/src/error.rs b/src/table/src/error.rs
index aadd0a6bc4a1..ed18c471ce0c 100644
--- a/src/table/src/error.rs
+++ b/src/table/src/error.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 
 use common_error::prelude::*;
diff --git a/src/table/src/lib.rs b/src/table/src/lib.rs
index 808d4714c42f..9c86665ff69f 100644
--- a/src/table/src/lib.rs
+++ b/src/table/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod engine;
 pub mod error;
 pub mod metadata;
diff --git a/src/table/src/metadata.rs b/src/table/src/metadata.rs
index 460576027bd0..4676823c21fe 100644
--- a/src/table/src/metadata.rs
+++ b/src/table/src/metadata.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::{HashMap, HashSet};
 use std::sync::Arc;
 
diff --git a/src/table/src/predicate.rs b/src/table/src/predicate.rs
index 058e5efbaf77..64d32d57f409 100644
--- a/src/table/src/predicate.rs
+++ b/src/table/src/predicate.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 mod stats;
 
 use common_query::logical_plan::Expr;
diff --git a/src/table/src/predicate/stats.rs b/src/table/src/predicate/stats.rs
index b1e5d0d5a51c..b474eddeb190 100644
--- a/src/table/src/predicate/stats.rs
+++ b/src/table/src/predicate/stats.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use datafusion::parquet::metadata::RowGroupMetaData;
 use datafusion::parquet::statistics::{
     BinaryStatistics, BooleanStatistics, FixedLenStatistics, PrimitiveStatistics,
diff --git a/src/table/src/requests.rs b/src/table/src/requests.rs
index 1f72077d70df..344d722103f3 100644
--- a/src/table/src/requests.rs
+++ b/src/table/src/requests.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 //! Table and TableEngine requests
 use std::collections::HashMap;
 
diff --git a/src/table/src/table.rs b/src/table/src/table.rs
index 55e74051ebc2..f3ba11245b5d 100644
--- a/src/table/src/table.rs
+++ b/src/table/src/table.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 pub mod adapter;
 pub mod numbers;
 pub mod scan;
diff --git a/src/table/src/table/adapter.rs b/src/table/src/table/adapter.rs
index d970f7a62d4b..32824e7a49e1 100644
--- a/src/table/src/table/adapter.rs
+++ b/src/table/src/table/adapter.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 use std::sync::Arc;
 
diff --git a/src/table/src/table/numbers.rs b/src/table/src/table/numbers.rs
index cf4f4303a2b4..26eab9a8bf85 100644
--- a/src/table/src/table/numbers.rs
+++ b/src/table/src/table/numbers.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 use std::pin::Pin;
 use std::sync::Arc;
diff --git a/src/table/src/table/scan.rs b/src/table/src/table/scan.rs
index 6f1fe0f7cbe9..73d5dd818123 100644
--- a/src/table/src/table/scan.rs
+++ b/src/table/src/table/scan.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 use std::fmt::{Debug, Formatter};
 use std::sync::{Arc, Mutex};
diff --git a/src/table/src/test_util.rs b/src/table/src/test_util.rs
index 49cb19c2e122..0cadbf689101 100644
--- a/src/table/src/test_util.rs
+++ b/src/table/src/test_util.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 mod empty_table;
 mod memtable;
 mod mock_engine;
diff --git a/src/table/src/test_util/empty_table.rs b/src/table/src/test_util/empty_table.rs
index eba10de20a6e..55b5e4f25d87 100644
--- a/src/table/src/test_util/empty_table.rs
+++ b/src/table/src/test_util/empty_table.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::sync::Arc;
 
 use async_trait::async_trait;
diff --git a/src/table/src/test_util/memtable.rs b/src/table/src/test_util/memtable.rs
index fda215d94cd7..aa16d15b794c 100644
--- a/src/table/src/test_util/memtable.rs
+++ b/src/table/src/test_util/memtable.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::any::Any;
 use std::pin::Pin;
 use std::sync::Arc;
diff --git a/src/table/src/test_util/mock_engine.rs b/src/table/src/test_util/mock_engine.rs
index 8142ccf0ac3c..af14a6112b83 100644
--- a/src/table/src/test_util/mock_engine.rs
+++ b/src/table/src/test_util/mock_engine.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use std::collections::HashMap;
 use std::sync::Arc;