text: -- @testpoint: 网络地址操作符<<=(包含于或等于)异常校验，合理报错
  
  SELECT inet '192.168.1.256/16' <<= inet '192.168.1.8/24' AS RESULT;
  SELECT inet '192.168.1.8/16' <<= inet '192.168.1.8.1/16' AS RESULT;
  SELECT inet '192.168.1.8/33' <<= inet '192.168.1.8/16' AS RESULT;
  
  SELECT inet '234e:0:4567::3f/1' <<= inet '234e::4567::3f/0' AS RESULT;
  SELECT inet '234e:0:45677::3f/127' <<= inet '234e:0:4567::3f/128' AS RESULT;
  SELECT inet '234e:0:4567::3f/129' <<= inet '234e:0:4567::3f/128' AS RESULT;
  
  SELECT inet '8.168.1.3/24' <<= inet '8.168.1.3/32' <<= inet '8.168.1.4' AS RESULT;
  
  SELECT inet '8.168.1.3/24' <<= inet '' AS RESULT;
  SELECT inet '' <<= inet '' AS RESULT;
  SELECT '&&' <<= '&&&' AS RESULT;
  