cloud-fan commented on code in PR #49202:
URL: https://github.com/apache/spark/pull/49202#discussion_r1893700681
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala:
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@@ -1831,8 +1838,8 @@ object PushPredicateThroughNonJoin extends
Rule[LogicalPlan] with PredicateHelpe
}
if (pushDown.nonEmpty) {
- val pushDownPredicate = pushDown.reduce(And)
Review Comment:
OK I think this will go very complicated. We can't completely avoid
duplicating large expressions because at some point, we can push down part of
the predicates, so the common expression will appear in multiple plan nodes and
we don't support cross-plan-nodes expression sharing yet.
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