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Posted to issues@drill.apache.org by "Boaz Ben-Zvi (JIRA)" <ji...@apache.org> on 2017/07/11 17:15:00 UTC

[jira] [Updated] (DRILL-5665) planner.force_2phase.aggr Set to TRUE for HashAgg may cause wrong results for VARIANCE and STD_DEV

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

Boaz Ben-Zvi updated DRILL-5665:
--------------------------------
    Reviewer: 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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