docs: def schema_create(dbname, name, owner=None,
                    user=None,
                    db_user=None, db_password=None,
                    db_host=None, db_port=None):
      '''
      Creates a Postgres schema.
  
      CLI Example:
  
      .. code-block:: bash
  
          salt '*' postgres.schema_create dbname name owner='owner' \\
                  user='user' \\
                  db_user='user' db_password='password'
                  db_host='hostname' db_port='port'
      '''
  
      # check if schema exists
      if schema_exists(dbname, name, user=user,
                       db_user=db_user, db_password=db_password,
                       db_host=db_host, db_port=db_port):
          log.info('\'%s\' already exists in \'%s\'', name, dbname)
          return False
  
      sub_cmd = 'CREATE SCHEMA "{0}"'.format(name)
      if owner is not None:
          sub_cmd = '{0} AUTHORIZATION "{1}"'.format(sub_cmd, owner)
  
      ret = _psql_prepare_and_run(['-c', sub_cmd],
                                  user=db_user, password=db_password,
                                  port=db_port, host=db_host,
                                  maintenance_db=dbname, runas=user)
  
      return ret['retcode'] == 0