def if_exists(self):
        if self.model._has_counter:
            raise IfExistsWithCounterColumn('if_exists cannot be used with tables containing counter columns')
        clone = copy.deepcopy(self)
        clone._if_exists = True
        return clone
Removes a tablespace from the Postgres server.
dataset/ETHPy150Open datastax/python-driver/cassandra/cqlengine/query.py/ModelQuerySet.if_exists--crossover with--dataset/ETHPy150Open saltstack/salt/salt/modules/postgres.py/tablespace_remove