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https://issues.apache.org/jira/browse/JENA-429?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13619079#comment-13619079
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Andy Seaborne commented on JENA-429:
------------------------------------

The query does not round trip through OpAsQuery.

    SELECT ?yearmonth ( count(?document) as ?total )
    WHERE
    {
        ?document a :Document;
                 :documentDateOfCreation ?date ;
                 :documentType "exam results" .
        BIND( mylib:DateFormat( xsd:string(?date), "yyyy-MM" ) as ?yearmonth )
    } group by ?yearmonth

The BIND is moved to the SELECT cause but that moves it the other side of the 
GROUP BY.
                
> OpAsQuery generating invalid query
> ----------------------------------
>
>                 Key: JENA-429
>                 URL: https://issues.apache.org/jira/browse/JENA-429
>             Project: Apache Jena
>          Issue Type: Bug
>          Components: ARQ
>    Affects Versions: Jena 2.10.0
>            Reporter: Andy Seaborne
>         Attachments: Jena429_TestCase.java
>
>
> From: 
> http://mail-archives.apache.org/mod_mbox/jena-users/201303.mbox/%3CCAFRj_AdcJsJ55xYvqZT7XRiojhNVLuhT8-k8g-0cy5Zk-6T03Q%40mail.gmail.com%3E

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