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https://issues.apache.org/jira/browse/JENA-587?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13820032#comment-13820032
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Rob Vesse commented on JENA-587:
--------------------------------

OK, so I think what we're getting at is that the optimisation needs to be 
applied more sparingly.

>From what you've outlined can we agree that this is valid if all the 
>{{DISTINCT}} variables appear in the {{ORDER BY}}?

> SELECT DISTINCT returns duplicate results
> -----------------------------------------
>
>                 Key: JENA-587
>                 URL: https://issues.apache.org/jira/browse/JENA-587
>             Project: Apache Jena
>          Issue Type: Bug
>          Components: ARQ
>    Affects Versions: Jena 2.11.0
>            Reporter: Veyriere
>         Attachments: D.ttl, Q.rq, bug Jena2.11.0.zip, jena-587.zip
>
>
> SELECT DISTINCT returns duplicate results. Attaching a small quads dump and 
> the query to reproduce with TDB
> Reproduced with Jena 2.11.0 and Jena 2.10.1 (was working with 2.7.4)



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