ORA-04098错误的文档说明如下:

ORA-04098: trigger 'string.string' is invalid and failed re-validation

Cause: A trigger was attempted to be retrieved for execution and was found to be invalid. This also means that compilation/authorization failed for the trigger.

Action: Options are to resolve the compilation/authorization errors, disable the trigger, or drop the trigger.

如果触发器可以disable或drop，那么disable或drop掉就可以了，但是如果不能disableh和drop那么常规方法不就能处理这个错误，需要使用隐藏参数。

测试如下：

创建序列

create sequence seq minvalue 0 maxvalue 999;

创建触发器

create or replace trigger test_trigger

after ddl on database

　　declare   seqnum number;

begin  

　　select seq.nextval into seqnum from dual;

end;

create or replace trigger test_trigger1

before ddl on database

　　declare   seqnum number;

begin  

　　select seq.nextval into seqnum from dual;

end;

删除序列使触发器失效 drop sequence seq;

删除时就会触发ORA-04098错误但是序列还是能删掉。之后执行ddl就会失败

SQL> create table test1(id int);  

create table test1(id int)  

ORA-04098: 触发器 'CHENJP.TEST_TRIGGER' 无效且未通过重新验证

disable或drop触发器

SQL> alter trigger CHENJP.TEST_TRIGGER disable;  

alter trigger CHENJP.TEST_TRIGGER disable  

ORA-04098: 触发器 'CHENJP.TEST_TRIGGER1' 无效且未通过重新验证  

SQL> alter trigger CHENJP.TEST_TRIGGER1  disable;  

alter trigger CHENJP.TEST_TRIGGER1  disable  

ORA-04098: 触发器 'CHENJP.TEST_TRIGGER' 无效且未通过重新验证

SQL> drop  trigger CHENJP.TEST_TRIGGER ;  

drop  trigger CHENJP.TEST_TRIGGER  

ORA-04098: 触发器 'CHENJP.TEST_TRIGGER1' 无效且未通过重新验证  

SQL> drop trigger CHENJP.TEST_TRIGGER1;  

drop trigger CHENJP.TEST_TRIGGER1  

ORA-04098: 触发器 'CHENJP.TEST_TRIGGER' 无效且未通过重新验证  

这时需要使用隐藏参数_system_trig_enabled禁用触发器，然后disable或drop触发器，操作如下：

SQL> alter system set "_system_trig_enabled"=false;

System altered.

SQL> drop  trigger CHENJP.TEST_TRIGGER ;  

Trigger dropped  

SQL> drop trigger CHENJP.TEST_TRIGGER1;  

Trigger dropped

SQL> alter system set "_system_trig_enabled"=true;

System altered.