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Posted to dev@hive.apache.org by "Namit Jain (JIRA)" <ji...@apache.org> on 2009/06/25 08:05:07 UTC

[jira] Commented: (HIVE-530) Map Join followup: optimize number of map-reduce jobs

    [ https://issues.apache.org/jira/browse/HIVE-530?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12723912#action_12723912 ] 

Namit Jain commented on HIVE-530:
---------------------------------

As a first cut, the whole job should be made map-only single job if possible

> Map Join followup: optimize number of map-reduce jobs
> -----------------------------------------------------
>
>                 Key: HIVE-530
>                 URL: https://issues.apache.org/jira/browse/HIVE-530
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Query Processor
>    Affects Versions: 0.4.0
>            Reporter: Namit Jain
>            Assignee: Namit Jain
>
> Instead of creating a temporary destination after every mapJoin, avoid where-ever possible.
> Also, replace the Select after MapJoin with a ForwardOperator

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