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From "Remus Rusanu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-15723) Hive should report a warning about missing table/column statistics to user.
Date Fri, 27 Jan 2017 17:21:24 GMT

    [ https://issues.apache.org/jira/browse/HIVE-15723?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15843145#comment-15843145
] 

Remus Rusanu commented on HIVE-15723:
-------------------------------------

RB https://reviews.apache.org/r/56025/

> Hive should report a warning about missing table/column statistics to user.
> ---------------------------------------------------------------------------
>
>                 Key: HIVE-15723
>                 URL: https://issues.apache.org/jira/browse/HIVE-15723
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: Remus Rusanu
>            Assignee: Remus Rusanu
>            Priority: Minor
>             Fix For: 2.2.0
>
>         Attachments: HIVE-15723.01.patch, HIVE-15723.02.patch
>
>
> Many Hive performance issues are due to missing statistics. Either all, table or column
statistics are missing. Potentially a new partition has been added and customer forgot to
gather stats for that partition.
> A simple warning about a table or column missing statistics can be very helpful and makes
hive more user friendly. Hive already has this information, its a matter of printing it out.



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