mihailotim-db commented on code in PR #50010:
URL: https://github.com/apache/spark/pull/50010#discussion_r1963043803


##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/NaturalAndUsingJoinResolution.scala:
##########
@@ -120,13 +124,15 @@ object NaturalAndUsingJoinResolution extends 
DataTypeErrorsBase with SQLConfHelp
   private def computeOutputAndHiddenOutput(
       leftOutput: Seq[Attribute],
       leftKeys: Seq[Attribute],
+      leftKeysLookup: AttributeSet,
       rightOutput: Seq[Attribute],
       rightKeys: Seq[Attribute],
+      rightKeysLookup: AttributeSet,
       joinPairs: Seq[(Attribute, Attribute)],
       joinType: JoinType): (Seq[NamedExpression], Seq[Attribute]) = {
     // columns not in joinPairs
-    val lUniqueOutput = leftOutput.filterNot(att => leftKeys.contains(att))
-    val rUniqueOutput = rightOutput.filterNot(att => rightKeys.contains(att))
+    val lUniqueOutput = leftOutput.filterNot(att => 
leftKeysLookup.contains(att))
+    val rUniqueOutput = rightOutput.filterNot(att => 
rightKeysLookup.contains(att))

Review Comment:
   Yeah, fair point, fixed!



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