AngersZhuuuu edited a comment on issue #26437: [SPARK-29800][SQL] Plan Exists 's subquery in PlanSubqueries URL: https://github.com/apache/spark/pull/26437#issuecomment-552178025 @cloud-fan @dilipbiswal @maropu For support correlated subquery in join's on condition like https://github.com/apache/spark/pull/25854#discussion_r335293923 We need to update `PushPredicateThroughJoin ` and `RewritePredicateSubquery ` together. Since in `PushPredicateThroughJoin` it will transform a subquery condition rewrite as a Filter's condition. This change will be catch by `RewritePredicateSubquery`, and after `RewritePredicateSubquery`'s transform, the total logical is broken. I prefer to fix all this after this pr and https://github.com/apache/spark/pull/26431 finished
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