mgaido91 commented on a change in pull request #25204:
[SPARK-28441][SQL][Python] Fix error when non-foldable expression is used in
correlated scalar subquery
URL: https://github.com/apache/spark/pull/25204#discussion_r307183647
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/subquery.scala
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@@ -316,25 +316,46 @@ object RewriteCorrelatedScalarSubquery extends
Rule[LogicalPlan] {
newExpression.asInstanceOf[E]
}
+ private def removeAlias(expr: Expression): Expression = expr match {
Review comment:
what if there are several aliases? Shall we use `CleanupAliases` instead?
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