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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