sigmod commented on code in PR #36909:
URL: https://github.com/apache/spark/pull/36909#discussion_r904429256
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala:
##########
@@ -753,6 +753,9 @@ object LimitPushDown extends Rule[LogicalPlan] {
// Merge offset value and limit value into LocalLimit and pushes down
LocalLimit through Offset.
case LocalLimit(le, Offset(oe, grandChild)) =>
Offset(oe, LocalLimit(Add(le, oe), grandChild))
+ // Push down local limit 1 if join type is LeftSemiOrAnti and join
condition is empty.
+ case j @ Join(_, right, LeftSemiOrAnti(_), None, _) if
!right.maxRows.exists(_ <= 1) =>
Review Comment:
Gotcha, make sense. Thank you, @wangyum !
--
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: reviews-unsubscr...@spark.apache.org
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org
For additional commands, e-mail: reviews-h...@spark.apache.org
