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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (OPENJPA-1794) Result of aggregate function MAX is 0 on empty table (instead of NULL).
Date Tue, 23 Jul 2013 18:26:52 GMT

    [ https://issues.apache.org/jira/browse/OPENJPA-1794?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13716694#comment-13716694
] 

ASF subversion and git services commented on OPENJPA-1794:
----------------------------------------------------------

Commit 1506198 from [~techhusky] in branch 'openjpa/trunk'
[ https://svn.apache.org/r1506198 ]

OPENJPA-1794 aggregate function with no result set must return null
                
> Result of aggregate function MAX is 0 on empty table (instead of NULL).
> -----------------------------------------------------------------------
>
>                 Key: OPENJPA-1794
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-1794
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: query
>    Affects Versions: 2.0.0
>            Reporter: Vera Filippova
>            Assignee: Jeremy Bauer
>         Attachments: OPENJPA-1794.patch
>
>
> Below is a snippet of a test case... the max should be null, but is zero.
>             Object count = em.createQuery("Select count(p.pk) from Entity1 p where 1=1").getSingleResult();
>             Object max = em.createQuery("Select max(p.pk) from Entity1 p where 1=1").getSingleResult();
>             System.out.println("count:"+count+ " max:"+max);
>             > count:0 max:0

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