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Posted to issues@hive.apache.org by "Vihang Karajgaonkar (JIRA)" <ji...@apache.org> on 2018/06/04 20:09:00 UTC

[jira] [Updated] (HIVE-19605) TAB_COL_STATS table has no index on db/table name

     [ https://issues.apache.org/jira/browse/HIVE-19605?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vihang Karajgaonkar updated HIVE-19605:
---------------------------------------
    Attachment: HIVE-19605.02.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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