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https://issues.apache.org/jira/browse/HIVE-27725?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Denys Kuzmenko updated HIVE-27725:
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Affects Version/s: 4.0.0
> Remove redundant columns in TAB_COL_STATS and PART_COL_STATS
> ------------------------------------------------------------
>
> Key: HIVE-27725
> URL: https://issues.apache.org/jira/browse/HIVE-27725
> Project: Hive
> Issue Type: Improvement
> Components: Hive
> Affects Versions: 4.0.0, 4.0.0-beta-1
> Reporter: Wechar
> Assignee: Wechar
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.1.0
>
>
> {{TAB_COL_STATS}} table includes {{CAT_NAME}}, {{DB_NAME}} and
> {{TABLE_NAME}}, which can be fetched by join {{TBLS}} and {{DBS}} tables on
> {{TBL_ID}} and {{DB_ID}} columns.
> {{PART_COL_STATS}} table includes {{CAT_NAME}}, {{DB_NAME}}, {{TABLE_NAME}}
> and {{PARTITION_NAME}}, which can be fetched by join {{PARTITIONS}}, {{TBLS}}
> and {{DBS}} tables on {{PART_ID}}, {{TBL_ID}} and {{DB_ID}}.
> In addition, current HMS get table statistics without join other table, while
> delete table statistics with join {{TBLS}}. This inconsistency will result
> exception if in a corner case where some table column statistics were left
> when drop table, then the user recreate the table with same name and database
> name but will get another {{TBL_ID}}, in this case user will get the old
> table column statistics incorrectly. And if user try delete stats fetched by
> get api, the {{NoSuchObjectException}} will be thrown.
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