maropu commented on a change in pull request #29585:
URL: https://github.com/apache/spark/pull/29585#discussion_r493980221
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/QueryPlan.scala
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@@ -201,11 +201,6 @@ abstract class QueryPlan[PlanType <: QueryPlan[PlanType]]
extends TreeNode[PlanT
case (oldAttr, _) => plan.references.contains(oldAttr)
}
- val (planAfterRule, newAttrMapping) = CurrentOrigin.withOrigin(origin)
{
- rule.applyOrElse(newPlan, (plan: PlanType) => plan -> Nil)
- }
- newPlan = planAfterRule
Review comment:
NOTE: I noticed that we need to update attribute references first, and
then apply a rule into a plan with the updated references. Otherwise, a rule
can see wrong(old) references in a plan.
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