Sparql endpoint does not recognize named graph

Question

Hi, I created a sem model A, and later added quads into it. while when I searched the named graph using sem_match from sql plus, it worked well, but it did not work using neither java code nor Joseki end point. For example, I simply count the number of triples, the number using sem_match is greater than that using the code. so I guess the code does not recognize the new added quads. Any ideas?
here are the java code:
Oracle oracle = new Oracle(szJdbcURL, szUser, szPasswd);
DataSource ds = DatasetFactory.create();
ModelOracleSem model = ModelOracleSem.createOracleSemModel(oracle, szModelName);
ds.setDefaultModel(model);
String queryString =
" select (count(*) as ?count) from named <http://****> " +
" where {" +
" graph ?g {?s ?p ?o } " +
Query query = QueryFactory.create(queryString) ;
QueryExecution qexec = QueryExecutionFactory.create(query, ds) ;
ResultSet results = qexec.execSelect() ;
ResultSetFormatter.out(System.out, results, query);
So does Joseki end point, do I need to add the named graph into joseki-config.ttl?
Thanks.

Answer 1

Hi,
To deal with quads, you need to use DatasetGraphOracleSem class.
You can search for Test11.java in the following document.
http://docs.oracle.com/cd/E11882_01/appdev.112/e11828/sem_jena.htm
To configure named graph support for Joseki, please take a look at oracle:allGraphs
in Section 7.2 of the above document.
Hope it helps,
Zhe Wu