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https://issues.apache.org/jira/browse/HIVE-3891?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vikram Dixit K updated HIVE-3891:
---------------------------------

    Attachment: auto_sortmerge_join_1.q.out
                auto_sortmerge_join_1.q

Hi Namit,

I have added some more variations to the queries in auto_sortmerge_join_1.q. I 
originally did not catch that there was a SMB map join in stage-1. That as you 
say is correct. One thing I see is that if I try to join sorted, bucketed 
tables on different keys (last join in the attached file), I see a SMB Map join 
operator followed by a reduce side join. It seems like the reduce side join 
could actually become a map join operator. Is this possible?

Thanks
Vikram.
                
> physical optimizer changes for auto sort-merge join
> ---------------------------------------------------
>
>                 Key: HIVE-3891
>                 URL: https://issues.apache.org/jira/browse/HIVE-3891
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Namit Jain
>            Assignee: Namit Jain
>         Attachments: auto_sortmerge_join_1.q, auto_sortmerge_join_1.q.out, 
> hive.3891.1.patch, hive.3891.2.patch, hive.3891.3.patch, hive.3891.4.patch, 
> hive.3891.5.patch, hive.3891.6.patch, hive.3891.7.patch
>
>


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