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Posted to dev@jena.apache.org by "Andy Seaborne (JIRA)" <ji...@apache.org> on 2018/04/13 14:07:00 UTC

[jira] [Assigned] (JENA-1517) Some queries not working when using OpQuadBlock

     [ https://issues.apache.org/jira/browse/JENA-1517?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andy Seaborne reassigned JENA-1517:
-----------------------------------

    Assignee: Andy Seaborne

> Some queries not working when using OpQuadBlock
> -----------------------------------------------
>
>                 Key: JENA-1517
>                 URL: https://issues.apache.org/jira/browse/JENA-1517
>             Project: Apache Jena
>          Issue Type: Bug
>          Components: ARQ
>    Affects Versions: Jena 3.6.0
>            Reporter: Jeremy Coulon
>            Assignee: Andy Seaborne
>            Priority: Major
>
> I am using a custom QueryEngine that rewrites algebra. I am transforming OpBGP into OpQuadBlock (not OpQuadPattern).
> Most queries work fine except when using one of the following:
>  * MINUS
>  * FILTER EXISTS
>  * FILTER NOT EXISTS
> I tracked the issue down to this visitor: org.apache.jena.sparql.algebra.OpVarsPattern.
> An override for visit(OpQuadBlock) is missing.



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