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From "Vihang Karajgaonkar (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-19605) TAB_COL_STATS table has no index on db/table name
Date Mon, 04 Jun 2018 20:09:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-19605?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16500789#comment-16500789
] 

Vihang Karajgaonkar commented on HIVE-19605:
--------------------------------------------

Tests work for me locally. Resubmitting the patch.

> TAB_COL_STATS table has no index on db/table name
> -------------------------------------------------
>
>                 Key: HIVE-19605
>                 URL: https://issues.apache.org/jira/browse/HIVE-19605
>             Project: Hive
>          Issue Type: Bug
>          Components: Metastore
>            Reporter: Todd Lipcon
>            Assignee: Vihang Karajgaonkar
>            Priority: Major
>         Attachments: HIVE-19605.01.patch, HIVE-19605.02.patch
>
>
> The TAB_COL_STATS table is missing an index on (CAT_NAME, DB_NAME, TABLE_NAME). The getTableColumnStatistics
call queries based on this tuple. This makes those queries take a significant amount of time
in large metastores since they do a full table scan.



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