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https://issues.apache.org/jira/browse/SPARK-36112?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17716289#comment-17716289
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Jia Fan commented on SPARK-36112:
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Hi, [~allisonwang-db] I checked the code. Seem like the only work is change the
code in `PullupCorrelatedPredicates`. Just make sure Exists invoke
`decorrelate`.
!image-2023-04-25-21-51-55-961.png|width=617,height=275!
Because `DecorrelateInnerQuery` already support Filter in subQuery. And Exists
also be supported in `RewritePredicateSubquery`. Should I change just one line?
Or is there something else I don't understand?
> Enable DecorrelateInnerQuery for IN/EXISTS subqueries
> -----------------------------------------------------
>
> Key: SPARK-36112
> URL: https://issues.apache.org/jira/browse/SPARK-36112
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.2.0
> Reporter: Allison Wang
> Priority: Major
> Attachments: image-2023-04-25-21-51-55-961.png
>
>
> Currently, `DecorrelateInnerQuery` is only enabled for scalar and lateral
> subqueries. We should enable `DecorrelateInnerQuery` for IN/EXISTS
> subqueries. Note we need to add the logic to rewrite domain joins in
> `RewritePredicateSubquery`.
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