[Mulgara-dev] Virtual model in mulgara.
Alex Cozzi
alexcozzi at gmail.com
Tue Feb 6 19:08:29 UTC 2007
Thanks Paul, Thanks Andrae,
your explanations have been very helpful.
I had a problem in my test query:
Answer answer = session.query(
new Query(selectList, // SELECT
new ModelResource(systemModelURI), // FROM
new ConstraintConjunction(
new ConstraintImpl(new
URIReferenceImpl(resource),
new Variable("p"), new Variable("v"), //
<-- HERE IS THE MISSING PART: new URIReferenceImpl(testModelURI)),
new ConstraintImpl(new Variable("s"),
new Variable("p"), new Variable("v"),
new URIReferenceImpl(testModelURI)))
, null, // HAVING
Collections
.singletonList(new Order(new Variable("s"),
true)), // ORDER
// BY
null, // LIMIT
0, // OFFSET
new UnconstrainedAnswer() // GIVEN
));
I was missing the new URIReferenceImpl(testModelURI)) part of the
Constraint, that caused a EmptyResolution to be generated by some other
code, so that the getRowCardinality was never called. Now I am on track to
debug my code. Thanks for the additional suggestions I am slowly wrapping my
brain around this but now I feel I am finally doing progress.
Thanks for your patience.
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