Load the stream definition from the database

        :return: None

def load(self):
        """
        Load the stream definition from the database

        :return: None
        """
        with switch_db(StreamDefinitionModel, 'hyperstream'):
            self.mongo_model = StreamDefinitionModel.objects.get(__raw__=self.stream_id.as_raw())
            self._calculated_intervals = self.mongo_model.get_calculated_intervals()