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Posted to issues@hive.apache.org by "Wei Zheng (JIRA)" <ji...@apache.org> on 2015/09/22 19:23:04 UTC

[jira] [Updated] (HIVE-11714) Turn off hybrid grace hash join for cross product join

     [ https://issues.apache.org/jira/browse/HIVE-11714?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wei Zheng updated HIVE-11714:
-----------------------------
    Summary: Turn off hybrid grace hash join for cross product join  (was: Handle cross product join properly for Hybrid grace hashjoin)

> Turn off hybrid grace hash join for cross product join
> ------------------------------------------------------
>
>                 Key: HIVE-11714
>                 URL: https://issues.apache.org/jira/browse/HIVE-11714
>             Project: Hive
>          Issue Type: Bug
>          Components: Hive
>    Affects Versions: 1.2.0
>            Reporter: Wei Zheng
>            Assignee: Wei Zheng
>
> Current partitioning calculation is solely based on hash value of the key. For cross product join where keys are empty, all the rows will be put into partition 0. This falls back to the regular mapjoin behavior where we only have one hashtable.



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