code: def to_bigquery_fields(self, name_case=DdlParseBase.NAME_CASE.original):
          
  
          bq_fields = []
  
          for col in self.values():
              bq_fields.append(col.to_bigquery_field(name_case))
  
          return "[{}]".format(",".join(bq_fields))
docs: Generate BigQuery JSON fields define
  
          :param name_case: name case type
              * DdlParse.NAME_CASE.original : Return to no convert
              * DdlParse.NAME_CASE.lower : Return to lower
              * DdlParse.NAME_CASE.upper : Return to upper
  
          :return: BigQuery JSON fields define