cloud-fan 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_r307181512
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/subquery.scala
##########
@@ -432,6 +472,18 @@ object RewriteCorrelatedScalarSubquery extends
Rule[LogicalPlan] {
sys.error("This line should be unreachable")
}
+ /**
+ * This replaces original expression id used in attributes and aliases in
expression.
+ */
+ private def replaceOldExprId(
Review comment:
we can remove this.
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