@Override
protected ExtendedIterator<Triple> graphBaseFind(TripleMatch m)
{
// Fake a query.
SDBRequest cxt = new SDBRequest(getStore(), new Query()) ;
// If null, create and remember a variable, else use the node.
final Node s = (m.getMatchSubject()==null) ? Var.alloc("s") : m.getMatchSubject() ;
final Node p = (m.getMatchPredicate()==null) ? Var.alloc("p") : m.getMatchPredicate() ;
final Node o = (m.getMatchObject()==null) ? Var.alloc("o") : m.getMatchObject() ;