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https://issues.apache.org/jira/browse/HIVE-23390?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17106766#comment-17106766
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Mithun Antony commented on HIVE-23390:
--------------------------------------
Suggestion is to put a unique constraint in the TAB_COL_STATS on columns
DB_NAME, TABLE_NAME, COLUMN_NAME considering the fact that a there will be only
one record for a column
> Duplicate entry for a table in TAB_COL_STATS
> ---------------------------------------------
>
> Key: HIVE-23390
> URL: https://issues.apache.org/jira/browse/HIVE-23390
> Project: Hive
> Issue Type: Bug
> Components: Metastore
> Affects Versions: 2.3.4
> Reporter: Mithun Antony
> Priority: Major
>
> When *_analyze <table>_* command was executed from presto to update the stats
> of a table for the first time from multiple cluster sharing the same Hive
> metastore. Duplicate entry for the same table is inserted to the
> *_TAB_COL_STATS_* table.
> This lead to failure executing further *_analyze <table>_* commands.
> {code:java}
> Query failed: Multiple entries with same key:
> dummy=HiveColumnStatistics{integerStatistics=Optional[IntegerStatistics{min=OptionalLong[1],
> max=OptionalLong[1]}], doubleStatistics=Optional.empty,
> decimalStatistics=Optional.empty, dateStatistics=Optional.empty,
> booleanStatistics=Optional.empty, maxValueSizeInBytes=OptionalLong.empty,
> totalSizeInBytes=OptionalLong.empty, nullsCount=OptionalLong[0],
> distinctValuesCount=OptionalLong[1]} and
> dummy=HiveColumnStatistics{integerStatistics=Optional[IntegerStatistics{min=OptionalLong[1],
> max=OptionalLong[1]}], doubleStatistics=Optional.empty,
> decimalStatistics=Optional.empty, dateStatistics=Optional.empty,
> booleanStatistics=Optional.empty, maxValueSizeInBytes=OptionalLong.empty,
> totalSizeInBytes=OptionalLong.empty, nullsCount=OptionalLong[0],
> distinctValuesCount=OptionalLong[1]}.
> {code}
> Duplicate records in the *_TAB_COL_STATS_*
> {code:java}
> '7','default','dual','dummy','smallint','245671','1','1',NULL,NULL,NULL,NULL,'0','1',NULL,NULL,NULL,NULL,'1588345509'
>
> '11','default','dual','dummy','smallint','245671','1','1',NULL,NULL,NULL,NULL,'0','1',NULL,NULL,NULL,NULL,'1588345509'{code}
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