wangyum commented on a change in pull request #34850:
URL: https://github.com/apache/spark/pull/34850#discussion_r765776375
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
##########
@@ -2148,6 +2149,17 @@ object RewriteIntersectAll extends Rule[LogicalPlan] {
}
}
+/**
+ * Deduplicate the right side of left-semi join and left-anti join.
+ */
+object DeduplicateLeftSemiLeftAntiRightSide extends Rule[LogicalPlan] {
+ def apply(plan: LogicalPlan): LogicalPlan = plan.transformWithPruning(
+ _.containsPattern(LEFT_SEMI_OR_ANTI_JOIN), ruleId) {
+ case join @ Join(_, right, LeftSemiOrAnti(_), _, _) if
!right.isInstanceOf[Aggregate] =>
+ join.copy(right = Aggregate(right.output, right.output, right))
Review comment:
Deduplicate is not always has benefit. This is my initial PR:
https://github.com/apache/spark/pull/33465/commits/b5599010ba969ba4cc3a2ce85549fe226b75ae65
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
