From 1a703e2f8a31fff6ef63569ff8074e49eb502a37 Mon Sep 17 00:00:00 2001
From: Rocky Madden <github@rockymadden.com>
Date: Wed, 26 Jun 2024 14:26:47 -0600
Subject: [PATCH] fix: correct SmallDateTime upper bound range (#1621)

Co-authored-by: Michael Sun <47126816+MichaelSun90@users.noreply.github.com>
---
 src/data-types/smalldatetime.ts | 3 ++-
 test/unit/data-type.js          | 6 +-----
 2 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/src/data-types/smalldatetime.ts b/src/data-types/smalldatetime.ts
index 6169fc246..4748426ed 100644
--- a/src/data-types/smalldatetime.ts
+++ b/src/data-types/smalldatetime.ts
@@ -79,7 +79,8 @@ const SmallDateTime: DataType = {
 
     if (year === 2079) {
       // Month is 0-indexed, i.e. Jan = 0, Dec = 11
-      if (month > 4 || (month === 4 && date > 6)) {
+      // See: https://learn.microsoft.com/en-us/sql/t-sql/data-types/smalldatetime-transact-sql?view=sql-server-ver16
+      if (month > 5 || (month === 5 && date > 6)) {
         throw new TypeError('Out of range.');
       }
     }
diff --git a/test/unit/data-type.js b/test/unit/data-type.js
index 999648b07..be24625fa 100644
--- a/test/unit/data-type.js
+++ b/test/unit/data-type.js
@@ -1072,16 +1072,12 @@ describe('SmallDateTime', function() {
         TYPES.SmallDateTime.validate(new Date('Dec 31, 1889'));
       }, TypeError, 'Out of range.');
 
-      assert.throws(() => {
-        TYPES.SmallDateTime.validate(new Date('May 7, 2079'));
-      }, TypeError, 'Out of range.');
-
       assert.throws(() => {
         TYPES.SmallDateTime.validate(new Date('Jan 1, 2080'));
       }, TypeError, 'Out of range.');
 
       assert.throws(() => {
-        TYPES.SmallDateTime.validate(new Date('June 1, 2079'));
+        TYPES.SmallDateTime.validate(new Date('June 7, 2079'));
       }, TypeError, 'Out of range.');
     });
   });