Github user dilipbiswal commented on a diff in the pull request: https://github.com/apache/spark/pull/17713#discussion_r112819365 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala --- @@ -414,4 +352,269 @@ trait CheckAnalysis extends PredicateHelper { plan.foreach(_.setAnalyzed()) } + --- End diff -- note to reviewers: This function basically refactors the validation logic for subquery expressions from checkAnalysis. This is the entry point function to do all the validation for subquery is is called from checkAnalysis().
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