[jira] [Commented] (TAJO-1939) Implement PgSQLTablespace::getTableVolume() method

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TAJO-1939?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15143940#comment-15143940 ] 

ASF GitHub Bot commented on TAJO-1939:
--------------------------------------

GitHub user jihoonson opened a pull request:

    https://github.com/apache/tajo/pull/960

    TAJO-1939: Implement PgSQLTablespace::getTableVolume() method

    

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/jihoonson/tajo-2 TAJO-1939

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/tajo/pull/960.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #960
    
----
commit a6a6ee37c19e232ccae34821a600fd2c77aee95e
Author: Jihoon Son <ji...@apache.org>
Date:   2016-02-12T03:01:43Z

    Implement getTableVolumn() method

----


> Implement PgSQLTablespace::getTableVolume() method
> --------------------------------------------------
>
>                 Key: TAJO-1939
>                 URL: https://issues.apache.org/jira/browse/TAJO-1939
>             Project: Tajo
>          Issue Type: Task
>          Components: JDBC Storage
>            Reporter: Jihoon Son
>            Assignee: Jihoon Son
>             Fix For: 0.12.0
>
>
> Table volume has an important role in query planning. Tajo's query optimizer makes many decisions based on table volume, because it is currently the only available statistics. 
> However, PgSQLTablespace doesn't support getTableVolume() method, so our plan is not good when the query involves any pgsql tables. 



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