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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HIVE-75) limit does not work if applied to outer most block and it is not a query
Date Thu, 20 Nov 2008 23:44:44 GMT

     [ https://issues.apache.org/jira/browse/HIVE-75?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

dhruba borthakur updated HIVE-75:
---------------------------------

       Resolution: Fixed
    Fix Version/s: 0.20.0
     Hadoop Flags: [Reviewed]
           Status: Resolved  (was: Patch Available)

I just committed this. Thanks Namit!

> limit does not work if applied to outer most block and it is not a query
> ------------------------------------------------------------------------
>
>                 Key: HIVE-75
>                 URL: https://issues.apache.org/jira/browse/HIVE-75
>             Project: Hadoop Hive
>          Issue Type: Bug
>            Reporter: Namit Jain
>            Assignee: Namit Jain
>             Fix For: 0.20.0
>
>         Attachments: patch1.txt, patch2.txt
>
>
> limit does not work if applied to outer most block and it is not a query
> For eg
> insert into T1 select ... from T2 limit 10;
> will be executed as a map-job only.
> which means that the total number of rows in T1 is bounded by 10 * number of mappers.
> We need another map-reduce job to fix this or the move task needs to be modified.
> For now, the simpler fix of another map-reduce job should be ok, in future we can further
optimize it by modifying the move task

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