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https://issues.apache.org/jira/browse/HIVE-25311?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zoltan Haindrich reassigned HIVE-25311:
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> Slow compilation of union operators with >100 branches
> ------------------------------------------------------
>
> Key: HIVE-25311
> URL: https://issues.apache.org/jira/browse/HIVE-25311
> Project: Hive
> Issue Type: Improvement
> Reporter: Zoltan Haindrich
> Assignee: Zoltan Haindrich
> Priority: Major
>
> during the processing of an N way union operator the full plan is cloned N
> times; which might hurt compilation time performance
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