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Posted to issues@spark.apache.org by "Sujith Chacko (Jira)" <ji...@apache.org> on 2023/03/05 09:05:00 UTC

[jira] [Commented] (SPARK-27714) Support Join Reorder based on Genetic Algorithm when the # of joined tables > 12

    [ https://issues.apache.org/jira/browse/SPARK-27714?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17696543#comment-17696543 ] 

Sujith Chacko commented on SPARK-27714:
---------------------------------------

[~xinxianyin]  any work is in progress for this issue? I saw a PR [https://github.com/apache/spark/pull/24983,] can we reopen the same for the review. Thanks

> Support Join Reorder based on Genetic Algorithm when the # of joined tables > 12
> --------------------------------------------------------------------------------
>
>                 Key: SPARK-27714
>                 URL: https://issues.apache.org/jira/browse/SPARK-27714
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 3.1.0
>            Reporter: Xianyin Xin
>            Assignee: Xianyin Xin
>            Priority: Major
>
> Now the join reorder logic is based on dynamic planning which can find the most optimized plan theoretically, but the searching cost grows rapidly with the # of joined tables grows. It would be better to introduce Genetic algorithm (GA) to overcome this problem.



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