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https://issues.apache.org/jira/browse/HIVE-11787?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chaoyu Tang resolved HIVE-11787.
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Resolution: Won't Fix
The normalization of these stats tables has been observed to cause some
performance degrade. So we leave them as is at this moment as a trade-off to
the better performance.
> Remove the redundant columns in TAB_COL_STATS and PART_COL_STATS
> ----------------------------------------------------------------
>
> Key: HIVE-11787
> URL: https://issues.apache.org/jira/browse/HIVE-11787
> Project: Hive
> Issue Type: Bug
> Components: Metastore
> Reporter: Chaoyu Tang
> Assignee: Chaoyu Tang
>
> After HIVE-11786 deprecates the use of redundant columns in TAB_COL_STATS and
> PART_COL_STATS at HMS code level, the column DB_NAME/TABLE_NAME in
> TAB_COL_STATS and DB_NAME/TABLE_NAME/PARTITION_NAME in PART_COL_STATS are
> useless and should be removed.
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