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Posted to issues@hive.apache.org by "Gopal V (JIRA)" <ji...@apache.org> on 2018/10/24 23:24:00 UTC

[jira] [Assigned] (HIVE-20802) Statistics: Provide per-column statistics expanded for "explain formatted"

     [ https://issues.apache.org/jira/browse/HIVE-20802?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gopal V reassigned HIVE-20802:
------------------------------

    Assignee: Gopal V

> Statistics: Provide per-column statistics expanded for "explain formatted"
> --------------------------------------------------------------------------
>
>                 Key: HIVE-20802
>                 URL: https://issues.apache.org/jira/browse/HIVE-20802
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Gopal V
>            Assignee: Gopal V
>            Priority: Major
>
> Debugging the internal per-column statistics of Hive is challenging, particularly when the estimations are approximate (hive.stats.estimate=true).
> Adding an extra columnStatistics field for all operators in "explain formatted" will allow tools to analyze the internal statistics transforms done by each operator without having to refer to debug logs.



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