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From "Yongqiang He (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HIVE-530) Map Join followup: optimize number of map-reduce jobs
Date Mon, 29 Jun 2009 12:21:47 GMT

    [ https://issues.apache.org/jira/browse/HIVE-530?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12725148#action_12725148

Yongqiang He commented on HIVE-530:

This patch intends to avoid one unneeded job which serves as intermediate data store. am i
The failure Zheng commented is caused by passing null as conf in the failed testcase.

> 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, hive.530.2.patch, hive.530.3.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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