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https://issues.apache.org/jira/browse/HIVE-11756?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14977866#comment-14977866
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Navis commented on HIVE-11756:
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cannot reproduce fail of index_bitmap_auto. others seemed not related.
> Avoid redundant key serialization in RS for distinct query
> ----------------------------------------------------------
>
> Key: HIVE-11756
> URL: https://issues.apache.org/jira/browse/HIVE-11756
> Project: Hive
> Issue Type: Improvement
> Components: Query Processor
> Reporter: Navis
> Assignee: Navis
> Priority: Trivial
> Attachments: HIVE-11756.1.patch.txt, HIVE-11756.2.patch.txt,
> HIVE-11756.3.patch.txt, HIVE-11756.4.patch.txt
>
>
> Currently hive serializes twice to know the length of distribution key for
> distinct queries. This introduces IndexedSerializer to avoid this.
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