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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 reassigned HIVE-21057:
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> 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
>
> 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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