maropu commented on a change in pull request #24258:
[SPARK-27279][SQL][FOLLOW-UP] Reuse subquery should compare child plan of
`SubqueryExec`
URL: https://github.com/apache/spark/pull/24258#discussion_r270695169
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/subquery.scala
##########
@@ -58,11 +61,11 @@ abstract class SubqueryExpression(
children.zip(p.children).forall(p => p._1.semanticEquals(p._2))
case _ => false
}
- def canonicalize(attrs: AttributeSeq): SubqueryExpression = {
+ override def canonicalize(attrs: AttributeSeq): SubqueryExpression = {
// Normalize the outer references in the subquery plan.
val normalizedPlan = plan.transformAllExpressions {
case OuterReference(r) => OuterReference(QueryPlan.normalizeExprId(r,
attrs))
- }
+ }.canonicalized
Review comment:
We need to the canonicalized plan here? It seems all the canonicalization
should happen in line 69?
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