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https://issues.apache.org/jira/browse/HIVE-5271?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gunther Hagleitner updated HIVE-5271:
-------------------------------------

    Attachment: HIVE-5271.5.patch

[~vikram.dixit] can you take a look at .5?

I've added some comments, but also I think there were two code issues:

a) pos wasn't incremented in the else branch, which I think leads to an 
incorrect big table position

b) big table position -1 was used when all tables are empty.

> Convert join op to a map join op in the planning phase
> ------------------------------------------------------
>
>                 Key: HIVE-5271
>                 URL: https://issues.apache.org/jira/browse/HIVE-5271
>             Project: Hive
>          Issue Type: Bug
>          Components: Tez
>    Affects Versions: tez-branch
>            Reporter: Vikram Dixit K
>            Assignee: Vikram Dixit K
>             Fix For: tez-branch
>
>         Attachments: HIVE-5271.2.patch, HIVE-5271.3.patch, HIVE-5271.4.patch, 
> HIVE-5271.5.patch, HIVE-5271.WIP.patch
>
>
> This captures the planning changes required in hive to support hash joins. We 
> need to convert the join operator to a map join operator. This is hooked into 
> the infrastructure provided by HIVE-5095.



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