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https://issues.apache.org/jira/browse/HIVE-530?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zheng Shao updated HIVE-530:
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Issue Type: Improvement (was: Bug)
> 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: Improvement
> 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,
> hive.530.4.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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