系统权限ADMINISTER DATABASE TRIGGER的作用

基于database创建一个系统trigger，遇到了权限问题，查了一下原来是需要ADMINISTER DATABASE TRIGGER权限[@more@]SQL> create or replace trigger trigg_db 2 after logon on database 3 -- for each row 4 declare 5 -- local variables here 6 begin 7 insert into t_trace values(sys_context('userenv','ip_address'), 8 sys_context('userenv','terminal'), 9 sys.login_user, 10 sysdate, 11 sys.sysevent); 12 end trigg_db; 13 / after logon on database *第 2 行出现错误:ORA-01031: 权限不足--============================SQL> grant ADMINISTER DATABASE TRIGGER to test;授权成功。SQL>--===========================SQL> create or replace trigger trigg_db 2 after logon on database 3 -- for each row 4 declare 5 -- local variables here 6 begin 7 insert into t_trace values(sys_context('userenv','ip_address'), 8 sys_context('userenv','terminal'), 9 sys.login_user, 10 sysdate, 11 sys.sysevent); 12 end trigg_db; 13 /触发器已创建SQL>--=========================To create a trigger on DATABASE, you must have the ADMINISTER DATABASE TRIGGER privilege. If this privilege is later revoked, then you can drop the trigger, but not alter it.--========================