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From "yunfei (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-4540) JOIN-GRP BY-DISTINCT fails with NPE when mapjoin.mapreduce=true
Date Thu, 26 Sep 2013 13:05:03 GMT

     [ https://issues.apache.org/jira/browse/HIVE-4540?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

yunfei updated HIVE-4540:
-------------------------

    Affects Version/s: 0.11.0
    
> JOIN-GRP BY-DISTINCT fails with NPE when mapjoin.mapreduce=true
> ---------------------------------------------------------------
>
>                 Key: HIVE-4540
>                 URL: https://issues.apache.org/jira/browse/HIVE-4540
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 0.11.0
>            Reporter: Gunther Hagleitner
>            Assignee: Gunther Hagleitner
>             Fix For: 0.12.0
>
>         Attachments: HIVE-4540.1.patch
>
>
> If the mapjoin.mapreduce optimization kicks in on a query of this form:
> {noformat}
> select count(distinct a.v) 
> from a join b on (a.k = b.k)
> group by a.g
> {noformat}
> The planer will NPE in the metadataonly optimizer.

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