Dimitris Kontokostas created JENA-750:
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Summary: Inconsistent state of QuerySolution
Key: JENA-750
URL: https://issues.apache.org/jira/browse/JENA-750
Project: Apache Jena
Issue Type: Bug
Components: Jena
Affects Versions: Jena 2.11.1
Environment: Ubuntu 14.02
Reporter: Dimitris Kontokostas
Steps to reproduce:
1) create an ontology Model
ModelFactory.createOntologyModel(OntModelSpec.OWL_DL_MEM,
ModelFactory.createDefaultModel());
2) read the following URI: http://dbpedia.org/resource/Berlin
with model.read()
3) run this query against the model
SELECT DISTINCT ?resource
WHERE
{ ?resource <http://xmlns.com/foaf/0.1/age> ?c }
GROUP BY ?resource
HAVING ( count(?c) != 1 )
===================
"resource" variable does not exists in the query solution and I get a
NullPointerException
while (results.hasNext()) {
QuerySolution qs = results.next();
String resource = qs.get("resource").toString();
}
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