[redland-dev] [Rasqal RDF Query Library 0000371]: SPARQL queries in rdfproc using Virtuoso don't work

Mantis Bug Tracker mantis-bug-sender at librdf.org
Mon May 17 09:25:47 CEST 2010


The following issue has been SUBMITTED. 
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http://bugs.librdf.org/mantis/view.php?id=371 
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Reported By:                naktinis
Assigned To:                
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Project:                    Rasqal RDF Query Library
Issue ID:                   371
Category:                   query engine
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     new
Query Language:              
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Date Submitted:             2010-05-17 07:25
Last Modified:              2010-05-17 07:25
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Summary:                    SPARQL queries in rdfproc using Virtuoso don't work
Description: 
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

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
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Issue History 
Date Modified    Username       Field                    Change               
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2010-05-17 07:25 naktinis       New Issue                                    
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