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Posted to dev@hive.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2018/05/18 18:02:00 UTC

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

Todd Lipcon created HIVE-19605:
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             Summary: 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


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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