Claus Stadler created JENA-1945:
-----------------------------------
Summary: Algebra.unionDefaultGraph: OpPath not handled
Key: JENA-1945
URL: https://issues.apache.org/jira/browse/JENA-1945
Project: Apache Jena
Issue Type: Improvement
Components: ARQ
Affects Versions: Jena 3.16.0
Reporter: Claus Stadler
{code:java}
System.out.println(
Algebra.unionDefaultGraph(
Algebra.compile(
QueryFactory.create("SELECT * { ?s <urn:p> ?o }"))));
/* Yields correct result:
(distinct
(graph ??_
(bgp (triple ?s <urn:p> ?o))))
*/
System.out.println(
Algebra.unionDefaultGraph(
Algebra.compile(
QueryFactory.create("SELECT * { ?s <urn:p1>/<urn:p2>/<urn:p3> ?o }"))));
/* Yields incorrect result because wrapping with graph ??_ (and distinct) is
missing:
(path ?s (seq (seq <urn:p1> <urn:p2>) <urn:p3>) ?o)
*/
{code}
It seems
[TransformUnionQuery.java|https://github.com/apache/jena/blob/master/jena-arq/src/main/java/org/apache/jena/sparql/algebra/TransformUnionQuery.java#L34]
lacks a handling (at least) for OpPath
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
