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https://issues.apache.org/jira/browse/HIVE-9663?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Laljo John Pullokkaran resolved HIVE-9663.
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Resolution: Not a Problem
> GroupBy Optimization
> --------------------
>
> Key: HIVE-9663
> URL: https://issues.apache.org/jira/browse/HIVE-9663
> Project: Hive
> Issue Type: Bug
> Reporter: Laljo John Pullokkaran
> Assignee: Laljo John Pullokkaran
> Attachments: HIVE-9663.patch
>
>
> It seems like GB op for every tuple while handling grouping sets performs
> unnecessary computations.
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