ORACLE如何限制某些人删除某些对角

create or replace trigger trg_dropdeny

before drop on database

begin

if lower(ora_dict_obj_name())='test'

then

  raise_application_error(

   num=>-20000,

msg=>'你疯了,想删除表'||ora_dict_obj_name()||'?!!!'||'你完了,警察来抓你了...');

end if;

end;

create table test(a number);

drop table test;

 

CREATE OR REPLACE TRIGGER trg_dropdeny

before drop on database

begin

if (sys.login_user!='SYS')

then

raise_application_error(

num=>-20000,

msg=>'You can not delete table ' || ora_dict_obj_name() || ' ! ');

end if;

end;