cloud-fan commented on a change in pull request #30430:
URL: https://github.com/apache/spark/pull/30430#discussion_r530478275
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoinExec.scala
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@@ -68,9 +68,9 @@ case class SortMergeJoinExec(
val leftKeyOrdering = getKeyOrdering(leftKeys, left.outputOrdering)
val rightKeyOrdering = getKeyOrdering(rightKeys, right.outputOrdering)
leftKeyOrdering.zip(rightKeyOrdering).map { case (lKey, rKey) =>
- // Also add the right key and its `sameOrderExpressions`
- SortOrder(lKey.child, Ascending, lKey.sameOrderExpressions +
rKey.child ++ rKey
- .sameOrderExpressions)
+ // Also add expressions from right side sort order
+ val sameOrderExpressions = ExpressionSet(lKey.children ++
rKey.children) - lKey.child
Review comment:
why not `ExpressionSet(lKey.sameOrderExpressions ++ rKey.children)`?
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