def savepoint_commit(self, sid):
        self.validate_thread_sharing()
        if self.savepoint_state:
            self._savepoint_commit(sid)
Commits the most recent savepoint (if one exists). Does nothing if
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.4/django/db/backends/__init__.py/BaseDatabaseWrapper.savepoint_commit