I have a workaround. It seems if I set the names of the graphs using a
VALUES clause like so, it works:
SELECT ?s ?p ?o
WHERE {
VALUES (?to ?from) {(<first-graph-uri> <second-graph-uri>)}
GRAPH ?from {
?s rdf:type skos:Concept .
?s ?p ?o .
}
MINUS {
GRAPH ?to {
?s ?p ?o .
}
}
}
Chris
On 12 March 2015 at 09:27, Chris Rimmer <chris.rim...@67bricks.com> wrote:
> Hugh,
>
> I'm using the Virtuoso Jena Provider.
> The version of Virtuoso is 07.10.3211, the Virtuoso Jena Provider jar is
> version 1.10, the JDBC jar is version 3.76 and the version of Jena itself
> is 2.12.1.
>
> Chris
>
> On 11 March 2015 at 17:27, Hugh Williams <hwilli...@openlinksw.com> wrote:
>
>> Hi Chris,
>>
>> How are you connecting Jena to Virtuoso, is this via is http client to
>> the Virtuoso SPARQL endpoint or via the Virtuoso Jena Provider ? Also
>> confirm the version of Virtuoso being used and if using the Jena Provider
>> the version of it …
>>
>> Best Regards
>> Hugh Williams
>> Professional Services
>> OpenLink Software, Inc. // http://www.openlinksw.com/
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>> Universal Data Access, Integration, and Management Technology Providers
>>
>> On 11 Mar 2015, at 16:23, Chris Rimmer <chris.rim...@67bricks.com> wrote:
>>
>> I am running the following query to give me a list of triples which exist
>> in one graph but do not exist in another:
>>
>> SELECT ?s ?p ?o
>> WHERE {
>> GRAPH ?from {
>> ?s rdf:type skos:Concept .
>> ?s ?p ?o .
>> }
>> MINUS {
>> GRAPH ?to {
>> ?s ?p ?o .
>> }
>> }
>> }
>>
>> This works as expected when run via the Conductor SPARQL interface (with
>> ?from and ?to bound correctly) and also works via Jena operating against an
>> in-memory TDB datastore. But when run via Jena against Virtuoso I get no
>> results at all.
>>
>> Any clue as to what is going wrong here?
>>
>> Thanks
>>
>> Chris
>>
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>>
>
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news, videos, case studies, tutorials and more. Take a look and join the
conversation now. http://goparallel.sourceforge.net/
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