[Virtuoso-users] SPARQL update inserts less triples than expected

[Bo Ferri]

Hi,

I'm trying to run a SPARQL update query in my Virtuoso 7 instance that  
should insert some triples to a certain pattern:

PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX myonto: <http://example.com/myonto#>

WITH <http://mygraph.example.com>
INSERT {
     ?resource rdf:type myonto:MyUpperClass
}
WHERE {
     ?resource rdf:type ?resourceType .
     ?resourceType rdfs:subClassOf myonto:MyUpperClass
}

=> result: Insert into <http://mygraph.example.com>, 84013 (or less)  
triples -- done

When running a query that should check the insert result, I'm getting  
a triple count that is lower than the one from the insert query:

PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX myonto: <http://example.com/myonto#>

SELECT count(DISTINCT(?resource))
FROM <http://mygraph.example.com>
WHERE {
     ?resource rdf:type ?resourceType .
     ?resourceType rdfs:subClassOf myonto:MyUpperClass .
     ?resource rdf:type myonto:MyUpperClass
}

=> result: 4014

However, when running the query without the last clause, I'm getting  
the result as I expected:

PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX myonto: <http://example.com/myonto#>

SELECT count(DISTINCT(?resource))
FROM <http://mygraph.example.com>
WHERE {
     ?resource rdf:type ?resourceType .
     ?resourceType rdfs:subClassOf myonto:MyUpperClass .
     ?resource rdf:type myonto:MyUpperClass
}

=> result: 84013

Any idea on what could be wrong with my workflow? I'm running the  
query from the SPARQL execution view in conductor. Is there maybe a  
kind of limit for inserting triples?
Thanks a lot in advance for all your help.

Cheers,


Bo



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