if ( opQuad.isDefaultGraph() )
g = ds.getDefaultGraph() ;
else
g = ds.getGraph(opQuad.getGraphNode()) ;
if ( g == null )
return new TableEmpty() ;
ExecutionContext cxt2 = new ExecutionContext(cxt, g) ;
QueryIterator qIter = StageBuilder.execute(pattern, QueryIterRoot.create(cxt2), cxt2) ;
return TableFactory.create(qIter) ;
}
else