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From "Boaz Ben-Zvi (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (DRILL-5665) planner.force_2phase.aggr Set to TRUE for HashAgg may cause wrong results for VARIANCE and STD_DEV
Date Tue, 11 Jul 2017 17:16:00 GMT

     [ https://issues.apache.org/jira/browse/DRILL-5665?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Boaz Ben-Zvi updated DRILL-5665:
--------------------------------
    Reviewer: Aman Sinha  (was: Paul Rogers)

> planner.force_2phase.aggr Set to TRUE for HashAgg may cause wrong results for VARIANCE
and STD_DEV
> --------------------------------------------------------------------------------------------------
>
>                 Key: DRILL-5665
>                 URL: https://issues.apache.org/jira/browse/DRILL-5665
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Execution - Relational Operators
>    Affects Versions: 1.11.0
>            Reporter: Boaz Ben-Zvi
>            Assignee: Boaz Ben-Zvi
>             Fix For: 1.11.0
>
>
> *planner.force_2phase.aggr* was added for testing the hash 2-phase spill to disk aggregation
implementation. However, if it is set to true, stream aggregate will run in two phase too
and return wrong results for some functions such as variance() and std_dev().



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