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From "Hyunsik Choi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (TAJO-35) Hybrid Hash Join Operator
Date Sat, 05 Oct 2013 06:09:41 GMT

    [ https://issues.apache.org/jira/browse/TAJO-35?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13786952#comment-13786952

Hyunsik Choi commented on TAJO-35:

Have you verified 'mvn clean install'? This patch causes many unit tests errors in 'mvn test'.

> Hybrid Hash Join Operator
> -------------------------
>                 Key: TAJO-35
>                 URL: https://issues.apache.org/jira/browse/TAJO-35
>             Project: Tajo
>          Issue Type: New Feature
>          Components: physical operator
>            Reporter: Hyunsik Choi
>            Assignee: Sergio Esteves
>              Labels: gsoc, gsoc2013, mentor
>         Attachments: TAJO-35.patch
> The hybrid hash join algorithm is well known as the best join algorithm which takes advantage
of more available memory. The goal of this proposal is to implement HybridHashJoinExec class
subclassed from PhysicalExec. Its original literature is "Join processing in database systems
with large main memories" (http://www.cs.ucr.edu/~tsotras/cs236/W13/join.pdf). In addition,
you could find many other materials available in the web.

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