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Posted to issues@drill.apache.org by "MinJi Kim (JIRA)" <ji...@apache.org> on 2016/03/22 00:25:25 UTC

[jira] [Commented] (DRILL-4521) Drill doesn't correctly treat VARIANCE and STDDEV as two phase aggregates

    [ https://issues.apache.org/jira/browse/DRILL-4521?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15205349#comment-15205349 ] 

MinJi Kim commented on DRILL-4521:
----------------------------------

https://drill.apache.org/docs/aggregate-and-aggregate-statistical/

stddev -> stddev_samp
variance -> var_samp

> 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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