Github user cloud-fan commented on a diff in the pull request: https://github.com/apache/spark/pull/12850#discussion_r65257181 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala --- @@ -742,6 +742,23 @@ object InferFiltersFromConstraints extends Rule[LogicalPlan] with PredicateHelpe * equivalent [[Literal]] values. */ object ConstantFolding extends Rule[LogicalPlan] { + private def isAssociativelyFoldable(e: Expression): Boolean = --- End diff -- I think this is OK, `BooleanSimplification` is also kind of constant folding but we made a new rule for it.
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