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From "Zheng Shao (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HIVE-195) map-side joins are not supported
Date Thu, 04 Jun 2009 01:28:07 GMT

     [ https://issues.apache.org/jira/browse/HIVE-195?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Zheng Shao updated HIVE-195:
----------------------------

       Resolution: Fixed
    Fix Version/s: 0.4.0
     Release Note: HIVE-195. Map-side join. (Namit Jain via zshao)
     Hadoop Flags: [Reviewed]
           Status: Resolved  (was: Patch Available)

Committed. Thanks Namit!

> map-side joins are not supported
> --------------------------------
>
>                 Key: HIVE-195
>                 URL: https://issues.apache.org/jira/browse/HIVE-195
>             Project: Hadoop Hive
>          Issue Type: New Feature
>          Components: Query Processor
>            Reporter: Namit Jain
>            Assignee: Namit Jain
>             Fix For: 0.4.0
>
>         Attachments: 195.patch1.txt, 195.patch2.txt, 195.patch3.txt, hive.195.4.patch,
hive.195.5.patch, hive.195.6.patch, hive.195.7.patch, hive.195.8.patch, hive.195.9.patch
>
>
> map-side joins are not supported.
> If all the tables but one are small and can fit in memory, the join should be performed
on the map-side. Ideally, it should be all cost-based, but
> to start with, the user should be given an option to specify that he needs a map-side
join.

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