base.py 文件源码

def visit_select_precolumns(self, select):
        """Access puts TOP, it's version of LIMIT here """
        s = select.distinct and "DISTINCT " or ""
        if select.limit:
            s += "TOP %s " % (select.limit)
        if select.offset:
            raise exc.InvalidRequestError(
                    'Access does not support LIMIT with an offset')
        return s