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https://issues.apache.org/jira/browse/SPARK-26639?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16744799#comment-16744799
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Marco Gaido commented on SPARK-26639:
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I see, then let me investigate this further.I think I already know the problem
and have a solution for it, I need to test if I am right though. I'll create a
PR for this in a few days as I am a bit overloaded now. Thanks.
> The reuse subquery function maybe does not work in SPARK SQL
> ------------------------------------------------------------
>
> Key: SPARK-26639
> URL: https://issues.apache.org/jira/browse/SPARK-26639
> Project: Spark
> Issue Type: Improvement
> Components: SQL, Web UI
> Affects Versions: 2.3.2, 2.4.0
> Reporter: Ke Jia
> Priority: Major
>
> The subquery reuse feature has done in
> [https://github.com/apache/spark/pull/14548]
> In my test, I found the visualized plan do show the subquery is executed
> once. But the stage of same subquery execute maybe not once.
>
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