Github user lianhuiwang commented on a diff in the pull request:
https://github.com/apache/spark/pull/14111#discussion_r70563183
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/QueryPlan.scala
---
@@ -263,7 +263,9 @@ abstract class QueryPlan[PlanType <:
QueryPlan[PlanType]] extends TreeNode[PlanT
* All the subqueries of current plan.
*/
def subqueries: Seq[PlanType] = {
- expressions.flatMap(_.collect {case e: SubqueryExpression =>
e.plan.asInstanceOf[PlanType]})
+ expressions.flatMap(_.collect {
+ case e: SubqueryExpression => e
--- End diff --
because we use ReusedScalarSubquery, not Alias to indicate the reused
SubqueryExpression, I think we don't use ExpressionCanonicalizer.
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