adds a constraint to this node.
Db4objects.Db4o.Query.IConstraint a new Db4objects.Db4o.Query.IConstraint for this query node or
nullfor objects implementing the Db4objects.Db4o.Query.IEvaluation interface.
adds a constraint to this node.
If the constraint contains attributes that are not yet present in the query graph, the query graph is extended accordingly.
Special behaviour for:
IQuery Interface | Db4objects.Db4o.Query Namespace