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From "hyoungjunkim (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (TAJO-725) Broadcast JOIN should supports multiple tables
Date Tue, 01 Apr 2014 16:19:14 GMT

    [ https://issues.apache.org/jira/browse/TAJO-725?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13956710#comment-13956710
] 

hyoungjunkim commented on TAJO-725:
-----------------------------------

- added "tajo.dist-query.join.broadcast.auto" property(defaut=true)
- added BroadcastJoinPlanVisitor class which visit plan to find boradcast candidate table
  
- added TupleCache which stores a broadcast table data
  This cache is created per execution block and table.

> Broadcast JOIN should supports multiple tables
> ----------------------------------------------
>
>                 Key: TAJO-725
>                 URL: https://issues.apache.org/jira/browse/TAJO-725
>             Project: Tajo
>          Issue Type: Improvement
>            Reporter: hyoungjunkim
>            Assignee: hyoungjunkim
>            Priority: Minor
>         Attachments: TAJO-725.patch
>
>
> Currently implementation Tajo uses single table for broadcast join even if there are
several small. Tajo should be supported this feature.



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