code: def as_sql(self, *args, **kwargs):
          
  
          def _as_sql():
              return super(CTEAggregateQueryCompiler, self).as_sql(*args, **kwargs)
  
          return CTECompiler.generate_sql(self.connection, self.query, _as_sql)
docs: Overrides the :class:`SQLAggregateCompiler` method in order to
          prepend the necessary CTE syntax, as well as perform pre- and post-
          processing, including adding the extra CTE table and WHERE clauses.
  
          :param qn:
          :type qn:
          :return:
          :rtype: