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Posted to issues@hive.apache.org by "Navis (JIRA)" <ji...@apache.org> on 2015/09/08 11:12:45 UTC

[jira] [Updated] (HIVE-11756) Avoid redundant key serialization in RS for distinct query

     [ https://issues.apache.org/jira/browse/HIVE-11756?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Navis updated HIVE-11756:
-------------------------
    Attachment: HIVE-11756.1.patch.txt

Attaching patch for preliminary test

> 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
>
>
> Currently hive serializes twice to know the length of distribution key for distinct queries. This introduces IndexedSerializer to avoid this.



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