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https://issues.apache.org/jira/browse/HIVE-4281?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13620634#comment-13620634
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Namit Jain commented on HIVE-4281:
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https://reviews.facebook.net/D9897
> add hive.map.groupby.sorted.testmode
> ------------------------------------
>
> Key: HIVE-4281
> URL: https://issues.apache.org/jira/browse/HIVE-4281
> Project: Hive
> Issue Type: Improvement
> Components: Query Processor
> Reporter: Namit Jain
> Assignee: Namit Jain
>
> The idea behind this would be to test hive.map.groupby.sorted.
> Since this is a new feature, it might be a good idea to run it in test mode,
> where a query property would denote that this query plan would have changed.
> If a customer wants, they can run those queries offline, compare the results
> for correctness, and set hive.map.groupby.sorted only if all the results are
> the same.
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