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From "JaeHwa Jung (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (TAJO-418) sort operator after Inline views consisting of unions can cause an incorrect distributed plan
Date Mon, 16 Dec 2013 07:02:06 GMT

    [ https://issues.apache.org/jira/browse/TAJO-418?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13848872#comment-13848872
] 

JaeHwa Jung commented on TAJO-418:
----------------------------------

+1 for the patch.
'mvn clean install' finished successfully. 

> sort operator after Inline views consisting of unions can cause an incorrect distributed
plan
> ---------------------------------------------------------------------------------------------
>
>                 Key: TAJO-418
>                 URL: https://issues.apache.org/jira/browse/TAJO-418
>             Project: Tajo
>          Issue Type: Bug
>          Components: distributed query plan
>            Reporter: Hyunsik Choi
>            Assignee: Hyunsik Choi
>             Fix For: 0.8-incubating
>
>         Attachments: TAJO-418.patch
>
>
> See the title. The following query is an example of this bug.
> {code}
> SELECT
>   l_returnflag,
>   l_linestatus
> FROM (
>   SELECT
>     *
>   FROM
>     lineitem
>   WHERE
>     l_returnflag = 'O'
>   UNION ALL
>   SELECT
>     *
>   FROM
>     lineitem
>   WHERE
>     l_returnflag = 'R'
> ) T
> GROUP BY
>   l_returnflag,
>   l_linestatus
> ORDER BY
>   l_returnflag,
>   l_linestatus
> {code}
> This patch adds an unit test to reproduce this case and includes the bug fix.



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