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Posted to issues@tajo.apache.org by "Jihoon Son (JIRA)" <ji...@apache.org> on 2015/09/02 03:51:46 UTC

[jira] [Commented] (TAJO-1456) Add a filter pushdown optimization phase after join ordering

    [ https://issues.apache.org/jira/browse/TAJO-1456?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14726579#comment-14726579 ] 

Jihoon Son commented on TAJO-1456:
----------------------------------

I've rescheduled to 0.12.

> Add a filter pushdown optimization phase after join ordering
> ------------------------------------------------------------
>
>                 Key: TAJO-1456
>                 URL: https://issues.apache.org/jira/browse/TAJO-1456
>             Project: Tajo
>          Issue Type: Improvement
>          Components: Planner/Optimizer
>            Reporter: Jihoon Son
>             Fix For: 0.12.0
>
>
> Currently, filter pushdown optimization is conducted only before join order optimization.
> However, the join order can be changed after its optimization, and thus the best position for each predicate will also be changed.
> This is why we need another filter pushdown phase after join order optimization.
> Please refer to the discussion at https://github.com/apache/tajo/pull/384.



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