Daniel, what is the point?
You didn’t clear if you have also a local dataset, but I think that the answer is the same, the result is empty. Why should be different? (in this situations, normally, I test. Seeing is believing :) ). In your dataset, instead of <a> <q> <c> you mean <a> <p> <c>? Miguel > On 23 Dec 2014, at 14:34, Daniel Hernández <[email protected]> wrote: > > Hello, > > Let us consider a service <s> which default dataset contains the default > graph: > > <a> <p> <b> . > <a> <q> <c> . > > Let us consider the following query to be evaluated with the service <s> > described above: > > SELECT * > WHERE { { <a> <p> ?x } FILTER ( EXISTS ( ?x <p> <c> ) ) } > > I suppose that in this case the filter clause is evaluated for each > solution of the graph pattern on the left. Thus, it is evaluated for > {?x:<b>} and {?x:<c>}. Then the clauses will be: > > {?x:<b>} --> EXISTS ( <b> <p> <c> ) (FALSE) > {?x:<c>} --> EXISTS ( <c> <p> <c> ) (FALSE) > > Then, the result of this query will be empty. > > Let us to consider the following query: > > SELECT * > WHERE { { <a> <p> ?x } > FILTER ( EXISTS ( SERVICE <s> { ?x <p> <c> } ) ) } > > What will be the result of this query? > > Regards, > Daniel >
