def test_loads_at_once(self):

        sess = create_session()
        def go():
            eq_(
                sess.query(Person).order_by(Person.person_id).all(),
                all_employees)
        count = {'':14, 'Polymorphic':9}.get(self.select_type, 10)
        self.assert_sql_count(testing.db, go, count)
Test that all objects load from the full query, when
dataset/ETHPy150Open zzzeek/sqlalchemy/test/orm/inheritance/test_polymorphic_rel.py/_PolymorphicTestBase.test_loads_at_once