docs: def run_command(self, config_file):
          """
          :param str config_file: The name of config file.
          """
          config = configparser.ConfigParser()
  
          config.read(config_file)
  
          rdbms = config.get('database', 'rdbms').lower()
          label_regex = config.get('constants', 'label_regex')
  
          constants = self.create_constants(rdbms)
          constants.main(config_file, label_regex)