code: def _columns_sql(self, with_namespace=False, **kwargs):
          
          return ' ({columns})'.format(
                columns=','.join(term.get_sql(with_namespace=False, **kwargs)
                                 for term in self._columns)
          )
docs: SQL for Columns clause for INSERT queries
          :param with_namespace:
              Remove from kwargs, never format the column terms with namespaces since only one table can be inserted into