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https://issues.apache.org/jira/browse/PHOENIX-2820?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15230378#comment-15230378
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Maryann Xue commented on PHOENIX-2820:
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[~jamestaylor], just checked, it was PHOENIX-2758 that caused this regression,
instead of PHOENIX-2802.
> Investigate why SortMergeJoinIT has a sort in the explain plan
> ---------------------------------------------------------------
>
> Key: PHOENIX-2820
> URL: https://issues.apache.org/jira/browse/PHOENIX-2820
> Project: Phoenix
> Issue Type: Bug
> Reporter: James Taylor
> Fix For: 4.8.0
>
>
> After removing an unnecessary merge sort for aggregate queries in this[1]
> commit, a sort started appearing in one of the explain plans for
> SortMergeJoinIT. This sort is not required, so we need to figure out why it
> is part of the explain plan now.
> [1]https://github.com/apache/phoenix/commit/15766625ab9a132f8d8ac625b026a5c56e62e879,
>
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