docs: def db_list(user=None, host=None, port=None, maintenance_db=None,
              password=None, runas=None):
      '''
      Return dictionary with information about databases of a Postgres server.
  
      CLI Example:
  
      .. code-block:: bash
  
          salt '*' postgres.db_list
      '''
  
      ret = {}
  
      query = (
          'SELECT datname as "Name", pga.rolname as "Owner", '
          'pg_encoding_to_char(encoding) as "Encoding", '
          'datcollate as "Collate", datctype as "Ctype", '
          'datacl as "Access privileges", spcname as "Tablespace" '
          'FROM pg_database pgd, pg_roles pga, pg_tablespace pgts '
          'WHERE pga.oid = pgd.datdba AND pgts.oid = pgd.dattablespace'
      )
  
      rows = psql_query(query, runas=runas, host=host, user=user,
                        port=port, maintenance_db=maintenance_db,
                        password=password)
  
      for row in rows:
          ret[row['Name']] = row
          ret[row['Name']].pop('Name')
  
      return ret