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Posted to dev@openjpa.apache.org by "Michael Dick (JIRA)" <ji...@apache.org> on 2009/10/29 20:23:59 UTC

[jira] Created: (OPENJPA-1365) DISTINCT keyword has no effect with JOIN FETCH queries

DISTINCT keyword has no effect with JOIN FETCH queries
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                 Key: OPENJPA-1365
                 URL: https://issues.apache.org/jira/browse/OPENJPA-1365
             Project: OpenJPA
          Issue Type: Bug
          Components: jpa, query
    Affects Versions: 1.0.4, 1.2.2, 1.3.0, 2.0.0-M4
            Reporter: Michael Dick
            Assignee: Michael Dick


This issue occurs if the proposed fix for OPENJPA-894 is in place. Without that fix there results of a JOIN FETCH are always distinct when obtained from the database or non-distinct when returned from the persistence context's L1 cache. 

I started a discussion on this topic on the dev mailing list. The entire thread can be seen on Nabble here : http://n2.nabble.com/How-should-we-handle-the-JPQL-DISTINCT-keyword-td3908400.html#a3908400



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[jira] Updated: (OPENJPA-1365) DISTINCT keyword has no effect with JOIN FETCH queries

Posted by "Michael Dick (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/OPENJPA-1365?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael Dick updated OPENJPA-1365:
----------------------------------

    Attachment: OPENJPA-1365-1.0.x-patch.txt

Attaching patch for 1.0.x. It requires the changes for OPENJPA-894 however. 

both issues use the same testcase, and those are duplicated in the patch (I'll fix this when OPENJPA-894 is committed). 

> DISTINCT keyword has no effect with JOIN FETCH queries
> ------------------------------------------------------
>
>                 Key: OPENJPA-1365
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-1365
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: jpa, query
>    Affects Versions: 1.0.4, 1.2.2, 1.3.0, 2.0.0-M4
>            Reporter: Michael Dick
>            Assignee: Michael Dick
>         Attachments: OPENJPA-1365-1.0.x-patch.txt
>
>
> This issue occurs if the proposed fix for OPENJPA-894 is in place. Without that fix there results of a JOIN FETCH are always distinct when obtained from the database or non-distinct when returned from the persistence context's L1 cache. 
> I started a discussion on this topic on the dev mailing list. The entire thread can be seen on Nabble here : http://n2.nabble.com/How-should-we-handle-the-JPQL-DISTINCT-keyword-td3908400.html#a3908400

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