We have a virtual graph mapping defined that executes against a 50M record table in Postgres DB. We have tried both a CONSTRUCT query and a SELECT query using this virtual graph (with the same results). Our mapping file defines 26 triples including the predicate, rdf:type, and different ontology-specific predicates, across 3 different individuals.
When we execute the queries, we get triples with only 3 of the predicates and don't get any triples for the remainder of the predicates (including rdf:type).
This is a very significant problem for us. Any help would be appreciated.
I can send you our mapping file (privately).
Andrea