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Posted to dev@jena.apache.org by "Jeremy Coulon (JIRA)" <ji...@apache.org> on 2018/04/09 12:31:00 UTC

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

Jeremy Coulon created JENA-1517:
-----------------------------------

             Summary: 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


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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