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https://issues.apache.org/jira/browse/SPARK-37567?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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junbiao chen updated SPARK-37567:
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Attachment: execution stage-query2.png
> reuse Exchange failed
> ----------------------
>
> Key: SPARK-37567
> URL: https://issues.apache.org/jira/browse/SPARK-37567
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.1.1
> Reporter: junbiao chen
> Priority: Major
> Labels: performance
> Attachments: execution stage-query2.png
>
>
> use case：query2 in TPC-DS.There are three exchange subquery will scan the
> same table "store_sales" in logical plan,these subqueries meet exchange reuse
> rule.I confirm that the exchange use rule work in physical plan.But when
> spark execute the physical plan,I find out
> exchange reuse failed,reused exchange has been executed twice.
> physical plan:
> !image-2021-12-07-17-39-10-548.png!
>
> executed stage:
> !image-2021-12-07-17-43-51-449.png!
>
> !image-2021-12-07-17-43-19-401.png!
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