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https://issues.apache.org/jira/browse/DRILL-6755?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16657447#comment-16657447
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ASF GitHub Bot commented on DRILL-6755:
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ilooner commented on issue #1480: DRILL-6755: Avoid building Hash Table for
inner/left join when probe side is empty
URL: https://github.com/apache/drill/pull/1480#issuecomment-431500649
@Ben-Zvi This was missed during the last batch commit for some reason. Could
you fix the merge conflict and merge it?
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> HashJoin should not build hash tables when probe side is empty.
> ---------------------------------------------------------------
>
> Key: DRILL-6755
> URL: https://issues.apache.org/jira/browse/DRILL-6755
> Project: Apache Drill
> Issue Type: Improvement
> Reporter: Timothy Farkas
> Assignee: Boaz Ben-Zvi
> Priority: Major
> Labels: ready-to-commit
> Fix For: 1.15.0
>
>
> Currently when doing an Inner or a Right join we still build hashtables when
> the probe side is empty. A performance optimization would be to not build
> them.
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