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https://issues.apache.org/jira/browse/DRILL-4521?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15218958#comment-15218958
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ASF GitHub Bot commented on DRILL-4521:
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Github user StevenMPhillips commented on the pull request:
https://github.com/apache/drill/pull/437#issuecomment-203657641
+1
> Drill doesn't correctly treat VARIANCE and STDDEV as two phase aggregates
> -------------------------------------------------------------------------
>
> Key: DRILL-4521
> URL: https://issues.apache.org/jira/browse/DRILL-4521
> Project: Apache Drill
> Issue Type: Bug
> Reporter: Jacques Nadeau
> Assignee: MinJi Kim
>
> These are supposed to be synonyms with STDDEV_POP and VARIANCE_POP but they
> are handled differently. This causes the reduce aggregates rule to not reduce
> these and thus they are handled as single phase aggregates.
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