[jira] [Commented] (HIVE-12905) Issue with mapjoin in tez under certain conditions

["Sergey Shelukhin (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-12905?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15112779#comment-15112779 ] 

Sergey Shelukhin commented on HIVE-12905:
-----------------------------------------

Nit:  if (writeHelper == null) { check should not be necessary, right?

Also do MR and Spark HashtableLoaders use putRow too? I don't recall, they need to be updated if they do.

Otherwise +1 pending tests.


> Issue with mapjoin in tez under certain conditions
> --------------------------------------------------
>
>                 Key: HIVE-12905
>                 URL: https://issues.apache.org/jira/browse/HIVE-12905
>             Project: Hive
>          Issue Type: Bug
>          Components: Tez
>    Affects Versions: 1.0.1, 1.2.1, 2.0.0
>            Reporter: Vikram Dixit K
>            Assignee: Vikram Dixit K
>            Priority: Blocker
>         Attachments: HIVE-12905.1.patch
>
>
> In a specific case where we have an outer join followed by another join on the same key and the non-outer side of the outer join is empty, hive-on-tez produces incorrect results.



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