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Posted to dev@hive.apache.org by "Remus Rusanu (JIRA)" <ji...@apache.org> on 2013/10/27 14:45:30 UTC

[jira] [Commented] (HIVE-5653) Vectorized Shuffle Join produces incorrect results

    [ https://issues.apache.org/jira/browse/HIVE-5653?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13806333#comment-13806333 ] 

Remus Rusanu commented on HIVE-5653:
------------------------------------

Cause is the VectorReduceSinkOperator, which does not initialize the tagBytes from the conf during initializeOp. This results in reduce side ExecReducer.reduce reading all keys as tag (==alias) 0. The reduce join operator sees all data in one side, nothing on the other, no rows match.

> Vectorized Shuffle Join produces incorrect results
> --------------------------------------------------
>
>                 Key: HIVE-5653
>                 URL: https://issues.apache.org/jira/browse/HIVE-5653
>             Project: Hive
>          Issue Type: Sub-task
>            Reporter: Remus Rusanu
>            Assignee: Remus Rusanu
>
> Vectorized shuffle join should work out-of-the-box, but it produces empty result set. Investigating.



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