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https://issues.apache.org/jira/browse/HIVE-12905?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15930782#comment-15930782
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Vaibhav Gumashta commented on HIVE-12905:
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[~sershe] Removing 1.2.2 from target version as this patch will need few others
(e.g. HIVE-11262, HIVE-11182 etc) and I'm not sure we should backport all. If
there is a patch for 1.2 before release, we can always incorporate that; let me
know if you feel otherwise.
> 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
> Fix For: 2.0.0
>
> Attachments: HIVE-12905.02.patch, 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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