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Posted to issues@hive.apache.org by "Jesus Camacho Rodriguez (Jira)" <ji...@apache.org> on 2020/08/01 00:05:00 UTC

[jira] [Work started] (HIVE-23973) Use SQL constraints to improve join reordering algorithm (III)

     [ https://issues.apache.org/jira/browse/HIVE-23973?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on HIVE-23973 started by Jesus Camacho Rodriguez.
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> Use SQL constraints to improve join reordering algorithm (III)
> --------------------------------------------------------------
>
>                 Key: HIVE-23973
>                 URL: https://issues.apache.org/jira/browse/HIVE-23973
>             Project: Hive
>          Issue Type: Improvement
>          Components: CBO
>            Reporter: Jesus Camacho Rodriguez
>            Assignee: Jesus Camacho Rodriguez
>            Priority: Major
>
> This issue focuses on pulling non-filtering column appending FK-PK joins to the top of the plan. Among other improvements, this will avoid unnecessary shuffling of data in intermediate stages.



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