def exists_database(self, name):
        return len(self.list_databases(like=name)) > 0
Boolean expression.  Test for presence of a non-NULL value for
dataset/ETHPy150Open cloudera/ibis/ibis/impala/client.py/ImpalaClient.exists_database--crossover with--dataset/ETHPy150Open RoseOu/flasky/venv/lib/python2.7/site-packages/sqlalchemy/dialects/postgresql/hstore.py/HSTORE.comparator_factory.defined