cloud-fan commented on a change in pull request #30955:
URL: https://github.com/apache/spark/pull/30955#discussion_r549590192
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/expressions.scala
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@@ -548,41 +548,66 @@ object PushFoldableIntoBranches extends Rule[LogicalPlan]
with PredicateHelper {
foldables.nonEmpty && others.length < 2
}
+ // Not all UnaryExpression support push into (if / case) branches, e.g.
Alias.
Review comment:
`Not all UnaryExpression can be pushed into (if / case) branches, e.g.
Alias.`
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