def check_constraints(self, table_names=None):
        self.cursor().execute('SET CONSTRAINTS ALL IMMEDIATE')
        self.cursor().execute('SET CONSTRAINTS ALL DEFERRED')
To check constraints, we set constraints to immediate. Then, when, we're done we must ensure they
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/django/db/backends/oracle/base.py/DatabaseWrapper.check_constraints