def _compile_union(self, union):
        if union['all']:
            joiner = ' UNION ALL '
        else:
            joiner = ' UNION '

        return '%s(%s)' % (joiner, union['query'].to_sql())
Create a command to list the names of interfaces on a bridge
dataset/ETHPy150Open sdispater/orator/orator/query/grammars/mysql_grammar.py/MySQLQueryGrammar._compile_union--crossover with--dataset/ETHPy150Open openstack/neutron/neutron/agent/ovsdb/api.py/API.list_ifaces