Minor fix in RelationExpander

vitrivr · Dec 11, 2023 · 63b6283 · 63b6283
1 parent cec605f
commit 63b6283
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/vitrivr-engine-query/src/main/kotlin/org/vitrivr/engine/query/transform/RelationExpander.kt b/vitrivr-engine-query/src/main/kotlin/org/vitrivr/engine/query/transform/RelationExpander.kt
@@ -38,7 +38,7 @@ class RelationExpander(
 
         val newIds = relations.flatMap { listOf(it.first, it.third) } - ids
 
-        val newRetrievables = retrievableReader.getAll(newIds.toList())
+        val newRetrievables = if (newIds.isNotEmpty()) retrievableReader.getAll(newIds.toList()) else emptySequence()
 
         val allRetrieved =
             (inputRetrieved.map { Retrieved.PlusRelationship(it) } + newRetrievables.map { Retrieved.WithRelationship(it) }).associateBy { it.id }