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Posted to issues@spark.apache.org by "Wenchen Fan (Jira)" <ji...@apache.org> on 2020/01/16 14:58:00 UTC

[jira] [Assigned] (SPARK-30524) Disable OptimizeSkewJoin rule if introducing additional shuffle.

     [ https://issues.apache.org/jira/browse/SPARK-30524?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wenchen Fan reassigned SPARK-30524:
-----------------------------------

    Assignee: Ke Jia

> Disable OptimizeSkewJoin rule if introducing additional shuffle.
> ----------------------------------------------------------------
>
>                 Key: SPARK-30524
>                 URL: https://issues.apache.org/jira/browse/SPARK-30524
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>    Affects Versions: 3.0.0
>            Reporter: Ke Jia
>            Assignee: Ke Jia
>            Priority: Major
>
> The OptimizeSkewedJoin will break the outputPartitioning of origin SMJ. And it may introduce additional shuffle after apply the OptimizeSkewedJoin. This PR will disable "OptimizeSkewedJoin" rule if introducing additional shuffle.



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