Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/16954#discussion_r103854544
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala
---
@@ -297,8 +284,11 @@ trait CheckAnalysis extends PredicateHelper {
s"Correlated scalar sub-queries can only be used in a
Filter/Aggregate/Project: $p")
}
- case p if
p.expressions.exists(PredicateSubquery.hasPredicateSubquery) =>
- failAnalysis(s"Predicate sub-queries can only be used in a
Filter: $p")
+ case p if
p.expressions.exists(SubqueryExpression.hasInOrExistsSubquery) =>
+ p match {
+ case _: Filter => // Ok
+ case other => failAnalysis(s"Predicate sub-queries can only
be used in a Filter: $p")
--- End diff --
`case _ => failAnalysis(`
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