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https://issues.apache.org/jira/browse/HIVE-23817?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17167086#comment-17167086
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Krisztian Kasa commented on HIVE-23817:
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Pushed to master, thanks [~amagyar]!
> Pushing TopN Key operator PKFK inner joins
> ------------------------------------------
>
> Key: HIVE-23817
> URL: https://issues.apache.org/jira/browse/HIVE-23817
> Project: Hive
> Issue Type: Improvement
> Reporter: Attila Magyar
> Assignee: Attila Magyar
> Priority: Major
> Labels: pull-request-available
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> If there is primary key foreign key relationship between the tables we can
> push the topnkey operator through the join.
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