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Posted to dev@hive.apache.org by "Namit Jain (JIRA)" <ji...@apache.org> on 2009/06/27 01:25:47 UTC

[jira] Updated: (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:all-tabpanel ]

Namit Jain updated HIVE-530:
----------------------------

    Attachment: hive.530.1.patch

optimized the scenario when the mapjoin is not followed by a reducer

> 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
>         Attachments: hive.530.1.patch
>
>
> 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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