HeartSaVioR commented on code in PR #40561:
URL: https://github.com/apache/spark/pull/40561#discussion_r1152828935
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala:
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@@ -679,6 +679,8 @@ object RemoveNoopUnion extends Rule[LogicalPlan] {
d.withNewChildren(Seq(simplifyUnion(u)))
case d @ Deduplicate(_, u: Union) =>
d.withNewChildren(Seq(simplifyUnion(u)))
+ case d @ DeduplicateWithinWatermark(_, u: Union) =>
Review Comment:
I'm OK with that. Let's say batch query has infinite delay threshold of
watermark. That will explain the behavior of batch query for this operator.
(Pretty sure it's conceptual and we can just route to existing API for batch
query.)
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