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https://issues.apache.org/jira/browse/SPARK-37567?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17454524#comment-17454524
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junbiao chen commented on SPARK-37567:
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Hi,[~davies], Is this a reuse bug?
> 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(1)-query2.png, execution
> stage-query2.png, physical plan-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：
> !physical plan-query2.png!
>
> execution stages：
> !execution stage-query2.png!
>
> !execution stage(1)-query2.png!
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