Andy Seaborne created JENA-2332:
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Summary: Bad optimization transform when modifers used in SERVICE
Key: JENA-2332
URL: https://issues.apache.org/jira/browse/JENA-2332
Project: Apache Jena
Issue Type: Bug
Components: ARQ
Affects Versions: Jena 4.5.0
Reporter: Andy Seaborne
Assignee: Andy Seaborne
Report: https://lists.apache.org/thread/87wgds6c43j88829bscx4xkwsgcgq58p
{noformat}
SELECT * {
SERVICE <https://dbpedia.org/sparql> { SELECT * { ?s a
<http://dbpedia.org/ontology/MusicalArtist> } LIMIT 5 }
SERVICE <https://dbpedia.org/sparql> { SELECT * { ?s
<http://www.w3.org/2000/01/rdf-schema#label> ?x } LIMIT 1 }
}
{noformat}
produces
{noformat}
(sequence
(service <https://dbpedia.org/sparql>
(slice _ 5
(bgp (triple ?s <http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://dbpedia.org/ontology/MusicalArtist>))))
(service <https://dbpedia.org/sparql>
(slice _ 1
(bgp (triple ?s <http://www.w3.org/2000/01/rdf-schema#label> ?x)))))
{noformat}
but this query can't be transformed because of {{?s}}.
It needs to remain as a join.
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