text: -- @testpoint: 指定网络地址输入为空
  
  drop table if exists test_inet_03;
  create table test_inet_03(id int,type inet);
  insert into test_inet_03 values(1,null);
  insert into test_inet_03 values(2,'');
  select * from test_inet_03;
  drop table test_inet_03;
  