EnricoMi commented on code in PR #37407:
URL: https://github.com/apache/spark/pull/37407#discussion_r972790708
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/QueryPlan.scala:
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@@ -208,6 +208,7 @@ abstract class QueryPlan[PlanType <: QueryPlan[PlanType]]
}
def recursiveTransform(arg: Any): AnyRef = arg match {
+ case ue: UnpivotExpr =>
ue.withNewChildren(ue.exprs.map(transformExpression))
Review Comment:
This is a very special treatment in a very generic method. Not nice, but the
best way I could find to make `mapExpressions` tranform `UnpivotExpr.exprs` as
a top-level expression. See comment on top-level expression in PR discussion.
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