Github user yhuai commented on a diff in the pull request:
https://github.com/apache/spark/pull/11417#discussion_r54482880
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/QueryPlan.scala
---
@@ -230,8 +230,12 @@ abstract class QueryPlan[PlanType <:
TreeNode[PlanType]] extends TreeNode[PlanTy
override def simpleString: String = statePrefix + super.simpleString
- override def treeChildren: Seq[PlanType] = {
- val subqueries = expressions.flatMap(_.collect {case e:
SubqueryExpression => e})
- children ++ subqueries.map(e => e.plan.asInstanceOf[PlanType])
--- End diff --
What is `treeChildren`? Its doc in TreeNode does not really show the
difference between it and `children`.
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