hadoop-hive-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Namit Jain (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HIVE-1246) mapjoin followed by another mapjoin should be performed in a single query
Date Tue, 16 Mar 2010 16:50:27 GMT

    [ https://issues.apache.org/jira/browse/HIVE-1246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12845988#action_12845988
] 

Namit Jain commented on HIVE-1246:
----------------------------------

Looks good - let us go over the changes in GenMapRedUtils offline 

> mapjoin followed by another mapjoin should be performed in a single query
> -------------------------------------------------------------------------
>
>                 Key: HIVE-1246
>                 URL: https://issues.apache.org/jira/browse/HIVE-1246
>             Project: Hadoop Hive
>          Issue Type: Improvement
>          Components: Query Processor
>            Reporter: Namit Jain
>            Assignee: He Yongqiang
>             Fix For: 0.6.0
>
>         Attachments: hive-1246.1.patch
>
>
> A query like:
> select /*+ MAPJOIN(c) */ ..
> from
> (select /*+ MAPJOIN(b) */ ..
> from a join b on k1) subq1
> join 
> c
> on k2
> should be performed in a single map-only job

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message