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Posted to issues@tajo.apache.org by "Jihoon Son (JIRA)" <ji...@apache.org> on 2015/07/20 05:32:04 UTC

[jira] [Resolved] (TAJO-1352) Improve the join order algorithm to consider missed cases of associative join operators

     [ https://issues.apache.org/jira/browse/TAJO-1352?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jihoon Son resolved TAJO-1352.
------------------------------
       Resolution: Fixed
    Fix Version/s: 0.11.0

Committed to master.

> Improve the join order algorithm to consider missed cases of associative join operators
> ---------------------------------------------------------------------------------------
>
>                 Key: TAJO-1352
>                 URL: https://issues.apache.org/jira/browse/TAJO-1352
>             Project: Tajo
>          Issue Type: Improvement
>          Components: planner/optimizer
>            Reporter: Jihoon Son
>            Assignee: Jihoon Son
>             Fix For: 0.11.0
>
>         Attachments: JoinGraph.png
>
>
> TAJO-1277 fixes a bug related to the associativity of join operators, but there are still some missed cases that join operators are associative. This work should include the cases described in the following links:
> * http://stackoverflow.com/questions/20022196/are-left-outer-joins-associative
> * https://cwiki.apache.org/confluence/display/Hive/LanguageManual+Joins



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