maropu commented on a change in pull request #23750: [SPARK-19712][SQL] Pushing
Left Semi and Left Anti joins through Project, Aggregate, Window, Union etc.
URL: https://github.com/apache/spark/pull/23750#discussion_r256813130
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/subquery.scala
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@@ -267,6 +267,17 @@ object ScalarSubquery {
case _ => false
}.isDefined
}
+
+ def hasScalarSubquery(e: Expression): Boolean = {
+ e.find {
+ case s: ScalarSubquery => true
Review comment:
`s` not used.
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