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From "Harish Butani (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-5973) SMB joins produce incorrect results with multiple partitions and buckets
Date Sat, 14 Dec 2013 00:51:07 GMT

    [ https://issues.apache.org/jira/browse/HIVE-5973?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13848114#comment-13848114
] 

Harish Butani commented on HIVE-5973:
-------------------------------------

+1

> SMB joins produce incorrect results with multiple partitions and buckets
> ------------------------------------------------------------------------
>
>                 Key: HIVE-5973
>                 URL: https://issues.apache.org/jira/browse/HIVE-5973
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Processor
>    Affects Versions: 0.13.0
>            Reporter: Vikram Dixit K
>            Assignee: Vikram Dixit K
>             Fix For: 0.13.0
>
>         Attachments: HIVE-5973.1.patch, HIVE-5973.2.patch
>
>
> It looks like there is an issue with re-using the output object array in the select operator.
When we read rows of the non-big tables, we hold on to the output object in the priority queue.
This causes hive to produce incorrect results because all the elements in the priority queue
refer to the same object and the join happens on only one of the buckets.
> {noformat}
> output[i] = eval[i].evaluate(row);
> {noformat}



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