Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/18790#discussion_r132093307
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
---
@@ -872,6 +886,25 @@ object PushDownPredicate extends Rule[LogicalPlan]
with PredicateHelper {
pushDownPredicate(filter, u.child) { predicate =>
u.withNewChildren(Seq(Filter(predicate, u.child)))
}
+
+ case filter @ Filter(condition, watermark: EventTimeWatermark) =>
--- End diff --
I see. How about moving this case above `UnaryNode`? The following two
functions `canPushThrough ` and `pushDownPredicate ` are just for UnaryNode.
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