code: def unpack_rows(self, parameters_metadata, connection):
          
          values = []
          for param in parameters_metadata:
              # Unpack OUT or INOUT parameters' values
              if param.iotype != parameter_direction.IN:
                  values.append( by_type_code[param.datatype].from_resultset(self.payload) )
          yield tuple(values)
docs: Unpack output or input/output parameters from the stored procedure call result
          :parameters_metadata: a stored procedure parameters metadata
          :returns: parameter values