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Posted to issues@spark.apache.org by "junbiao chen (Jira)" <ji...@apache.org> on 2021/12/07 09:52:00 UTC

[jira] [Updated] (SPARK-37567) reuse Exchange failed

     [ https://issues.apache.org/jira/browse/SPARK-37567?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

junbiao chen updated SPARK-37567:
---------------------------------
    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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