cloud-fan commented on a change in pull request #32602:
URL: https://github.com/apache/spark/pull/32602#discussion_r635821206
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/adaptive/EliminateUnnecessaryJoin.scala
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@@ -59,19 +66,33 @@ object EliminateUnnecessaryJoin extends Rule[LogicalPlan] {
case Some(count) => hasRow == (count > 0)
case _ => false
}
+
+ case LocalRelation(_, data, isStreaming) if !isStreaming =>
Review comment:
Since AQE is on by default, it's not a big issue but more about code
cleanness. How about this:
1. `EliminateUnnecessaryJoin` should only deal with `LocalRelation`, and
appears in both the normal optimizer and AQE optimizer
2. AQE optimizer adds a new rule to turn empty query stage into empty
`LocalRelation`
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