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https://issues.apache.org/jira/browse/HIVE-21057?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vineet Garg updated HIVE-21057:
-------------------------------
    Status: Patch Available  (was: Open)

> Make semi join reduction work with UNION
> ----------------------------------------
>
>                 Key: HIVE-21057
>                 URL: https://issues.apache.org/jira/browse/HIVE-21057
>             Project: Hive
>          Issue Type: Improvement
>          Components: Query Planning
>            Reporter: Vineet Garg
>            Assignee: Vineet Garg
>            Priority: Major
>         Attachments: HIVE-21057.1.patch, HIVE-21057.2.patch
>
>
> HIVE-21007 disabled semi-join for plans containing UNION since it generates a 
> operator tree which ends up producing invalid tez plan



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