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Posted to issues@hive.apache.org by "Jesus Camacho Rodriguez (JIRA)" <ji...@apache.org> on 2016/05/25 08:27:12 UTC

[jira] [Updated] (HIVE-13518) Hive on Tez: Shuffle joins do not choose the right 'big' table.

     [ https://issues.apache.org/jira/browse/HIVE-13518?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jesus Camacho Rodriguez updated HIVE-13518:
-------------------------------------------
    Target Version/s: 2.1.0

> Hive on Tez: Shuffle joins do not choose the right 'big' table.
> ---------------------------------------------------------------
>
>                 Key: HIVE-13518
>                 URL: https://issues.apache.org/jira/browse/HIVE-13518
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Vikram Dixit K
>            Assignee: Vikram Dixit K
>         Attachments: HIVE-13518.1.patch
>
>
> Currently the big table is always assumed to be at position 0 but this isn't efficient for some queries as the big table at position 1 could have a lot more keys/skew. We already have a mechanism of choosing the big table that can be leveraged to make the right choice.



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