Thanks! S.
On 4/11/17, 2:19 AM, "Andy Seaborne" <[email protected]> wrote: On 10/04/17 22:06, Dimov, Stefan wrote: > Hi, > > I’m using in-mem base and loading multiple named graphs in one data set, iterating thru : > > private static boolean loadGraphT(Dataset ds) { > … > String filename = … > String graphName = … > … > Model model = ds.getNamedModel(graphName); Put this inside the transaction > ds.begin(ReadWrite.WRITE); > FileManager.get().readModel(model, fileName); > ds.commit(); > ds.end(); > return true; > } ds.begin(ReadWrite.WRITE); Model model = ds.getNamedModel(graphName); RDFDataMgr.read(model, fileName); ds.commit(); ds.end(); or even: Txn.executeWrite(ds, ()->{ Model model = ds.getNamedModel(graphName); RDFDataMgr.read(model, fileName); }); http://jena.apache.org/documentation/txn/ > } > > > > At start, after everything is read and data set is committed, I’m printing out the graph names and their sizes, to check, if everything was loaded: > > 2017-04-10 13:50:50 INFO Ontology:50 - Named graph aaa - 7855 triples > 2017-04-10 13:50:50 INFO Ontology:50 - Named graph bbb - 26 triples > 2017-04-10 13:50:50 INFO Ontology:50 - Named graph ccc - 4 triples > 2017-04-10 13:50:50 INFO Ontology:50 - Named graph ddd - 20000 triples > … > > After that I’m trying to query some data from a named graph: > > SELECT count ($s) > FROM NAMED <aaa> > { > { ?s ?p ?o } > } > > or trying to query it without specifying graph: > > SELECT count ($s) > { > { ?s ?p ?o } > } > > The result is empty: > > { > "head": { > "vars": [ ".1" ] > } , > "results": { > "bindings": [ > { > ".1": { "type": "literal" , "datatype": "http://www.w3.org/2001/XMLSchema#integer"; , "value": "0" } > } > ] > } > } > > What am I doing wrong? > > S. >
