# Works
            for row in db.query(Node, sqlalchemy.literal_column("2 + 2").label("foo")):
                print row

            # Doesn't work
            for row in db.query(Node, sqlalchemy.literal_column("2 + 2")):
                print row

            # Works
            print db.query(Node, sqlalchemy.literal_column("2 + 2").label("foo"))

            # Works(!)
            print db.query(Node, sqlalchemy.literal_column("2 + 2"))