code: def show(self, *args, **kwds):
          
          # Same as in __call__, arguments win over keywords
          arg = args
          if not arg:
              arg = kwds  # pylint: disable=redefined-variable-type
          return self._db.show(self._sql, arg)
docs: Show how the SQL looks like when executed by the DB.
  
          This might not be supported by all connection types.
          For example: PostgreSQL does support it, SQLite does not.
  
          :rtype: str