cloud-fan commented on code in PR #39925:
URL: https://github.com/apache/spark/pull/39925#discussion_r1103967545
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/ColumnResolutionHelper.scala:
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@@ -369,4 +381,47 @@ trait ColumnResolutionHelper extends Logging {
throws = true,
allowOuter = allowOuter)
}
+
+ private def resolveExpressionByPlanId(
+ e: Expression,
+ q: LogicalPlan): Expression = {
+ if (!e.exists(_.getTagValue(LogicalPlan.PLAN_ID_TAG).nonEmpty)) {
+ return e
+ }
+
+ e match {
+ case u: UnresolvedAttribute =>
+ resolveUnresolvedAttributeByPlanId(u, q).getOrElse(u)
+ case l: LeafExpression => l
Review Comment:
this line can be removed. the next line covers it.
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