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https://issues.apache.org/jira/browse/SPARK-44781?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17753458#comment-17753458
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jiaan.geng commented on SPARK-44781:
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I'm working on.
> Runtime filter should supports reuse exchange if it can reduce the data size
> of application side
> ------------------------------------------------------------------------------------------------
>
> Key: SPARK-44781
> URL: https://issues.apache.org/jira/browse/SPARK-44781
> Project: Spark
> Issue Type: New Feature
> Components: SQL
> Affects Versions: 4.0.0
> Reporter: jiaan.geng
> Priority: Major
>
> Currently, Spark runtime filter only supports using the subquery on one table.
> In fact, we can reuse the exchange, even if it is a shuffle exchange.
> If the shuffle exchange come from a join which has one side with selective
> predicates, so the results of the join can be used to prune the data amount
> of the application side.
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