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https://issues.apache.org/jira/browse/HIVE-21439?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rajesh Balamohan updated HIVE-21439:
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Attachment: HIVE-21439.2.patch
> Provide an option to reduce lookup overhead for bucketed tables
> ---------------------------------------------------------------
>
> Key: HIVE-21439
> URL: https://issues.apache.org/jira/browse/HIVE-21439
> Project: Hive
> Issue Type: Bug
> Reporter: Rajesh Balamohan
> Assignee: Rajesh Balamohan
> Priority: Trivial
> Attachments: HIVE-21439.1.patch, HIVE-21439.2.patch
>
>
> If a table is bucketed, `OpTraitsRulesProcFactory::TableScanRule` ends up
> verifying if the partitions have got the same number of files as the number
> of buckets in table.
> https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/optimizer/metainfo/annotation/OpTraitsRulesProcFactory.java#L185
> In large tables, this turns out to be very time consuming (100s of seconds)
> operation. It would be good to have an option to by pass this depending on
> need basis.
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