[jira] [Created] (JENA-2132) Rename.java lacks RDFStar support

["Claus Stadler (Jira)" <ji...@apache.org>]

Claus Stadler created JENA-2132:
-----------------------------------

             Summary: Rename.java lacks RDFStar support
                 Key: JENA-2132
                 URL: https://issues.apache.org/jira/browse/JENA-2132
             Project: Apache Jena
          Issue Type: Bug
          Components: ARQ
    Affects Versions: Jena 4.1.0
            Reporter: Claus Stadler


This is a follow up to JIRA-2107 (RDF Star performance issue with non-concrete node triples)

The NodeTransformers in  Rename.java lacks renaming of variables in RDFStar NodeTriples.
A common side effect of this incomplete renaming is that the substitution provided for JIRA-2107 cannot be applied resulting in extremely query performance.

{code:java}
        Query query = QueryFactory.create
                ( "SELECT COUNT(*) {\n"
                + "  SELECT ?src {\n"
                + "    ?src  <urn:connectedTo>  ?src .\n"
                + "    << ?src <urn:connectedTo> ?src >>\n"
                + "                  <urn:hasValue>  ?v\n"
                + "  }\n"
                + "}"
                );

        Op op = Algebra.compile(query);
        Op op2 = TransformScopeRename.transform(op);
        System.out.println(op2);
{code}

Actual:
{noformat}
(project (?.1) (extend ((?.1 ?.0)) (group () ((?.0 (count))) (project (?src)
        (bgp
          (triple ?src <urn:connectedTo> ?src)
          (triple << ?src <urn:connectedTo> ?src >> <urn:hasValue> ?/v)
        )))))
{noformat}

Expected:
{noformat}
(project (?.1) (extend ((?.1 ?.0)) (group () ((?.0 (count))) (project (?src)
        (bgp
          (triple ?src <urn:connectedTo> ?src)
          (triple << ?src <urn:connectedTo> ?src >> <urn:hasValue> ?v)
                                                                   ^^
        )))))
{noformat}






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