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https://issues.apache.org/jira/browse/HIVE-12053?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14947764#comment-14947764
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Chaoyu Tang commented on HIVE-12053:
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[~sseth] have found that creating following indexes would not help to improve
the stats performance either
{code}
CREATE INDEX COLNAME_TBLID_IDX ON TAB_COL_STATS (COLUMN_NAME, TBL_ID);
CREATE INDEX COLNAME_IDX ON TAB_COL_STATS (COLUMN_NAME);
CREATE INDEX COLNAME_PARTID_IDX ON PART_COL_STATS (COLUMN_NAME, PART_ID);
CREATE INDEX COLNAME_IDX ON PART_COL_STATS (COLUMN_NAME);
CREATE INDEX PARTNAME_IDX ON PARTITIONS (PART_NAME);
CREATE INDEX TBLNAME_IDX ON TBLS (TBL_NAME);
{code}
> Stats performance regression caused by HIVE-11786
> -------------------------------------------------
>
> Key: HIVE-12053
> URL: https://issues.apache.org/jira/browse/HIVE-12053
> Project: Hive
> Issue Type: Bug
> Components: Metastore
> Reporter: Chaoyu Tang
>
> HIVE-11786 tried to normalize table TAB_COL_STATS/PART_COL_STATS but caused
> performance regression.
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