[redland-dev] SPARQL queries in rdfproc using Virtuoso

[Hugh Williams]

Hi Rymvydas,

Have you built the Redland Storage Provider into your Redland RDF Framework library as detailed at:

	http://virtuoso.openlinksw.com/dataspace/dav/wiki/Main/VirtRDFDriverRedland

 and ran the provides storage test programs to verified its operation ?

Best Regards
Hugh Williams
Professional Services
OpenLink Software
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On 9 May 2010, at 20:44, Rimvydas wrote:

> I can add triples to virtuoso using rdfproc, but SPARQL queries just don't seem to work.
> 
> Triple is added successfully:
> $ rdfproc -r xml -s virtuoso -t "user='usr',password='psw',dsn='VOS'" somecontext add aa bb cc
> rdfproc: added triple to the graph
> 
> Triple can be found using "find" command:
> $ rdfproc -r xml -s virtuoso -t "user='usr',password='psw',dsn='VOS'" somecontext find aa bb cc
> Matched triple: {[aa], [bb], "cc"} with context [somecontext]
> rdfproc: matching triples: 1
> 
> However, SPARQL queries return 0 results:
> $ rdfproc -s virtuoso -t "user='usr',password='psw',dsn='VOS'" somecontext query sparql - "SELECT * WHERE {?s ?p ?o}"
> rdfproc: Query returned bindings results:
> rdfproc: Query returned 0 results
> 
> Am I missing something here?
> 
> Note: I can run a similar query successfully in ODBC's ISQL like this:
> CALL DB.DBA.SPARQL_EVAL('SELECT * FROM NAMED <somecontext> {GRAPH <somecontext> {?s ?p ?o}}', NULL, 0)
> ...
> 1 row fetched
> 
> -- 
> Rimvydas
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