ORA-30502: system triggers cannot have INSERT, UPDATE, or DELETE as triggering events ORACLE 报错 故障修复 远程处理
文档解释
ORA-30502: system triggers cannot have INSERT, UPDATE, or DELETE as triggering events
Cause: An attempt was made to create a system trigger with INSERT, UPDATE, or DELETE triggering events, but this type of trigger is not supported because a system trigger does not have a base table.
Action: Do not attempt to create a system trigger with INSERT, UPDATE, or DELETE triggering events.
本错误是因为试图创建的触发器无法包括INSERT, UPDATE, or DELETE三种操作作为触发条件。
官方解释
ORA-30502:“系统触发器不能包含INSERT,UPDATE或DELETE作为触发事件。”
该错误消息指出,在使用CREATE_TRIGGER语句创建数据库触发器时,不允许将INSERT, UPDATE或DELETE作为触发操作。
常见案例
在创建触发器时,用户试图更新数据库中的某些表,如果触发器显示错误信息:ORA-30502,这表明没有INSERT,UPDATE或DELETE触发器。
一般处理方法及步骤
要解决ORA-30502错误,首先需要确定使用什么样的触发事件。可以使用ON LOGON,ON LOGOFF,ON SERVERERROR,ON SHUTDOWN之类的系统触发器,但不能使用INSERT,UPDATE或DELETE触发器。例如,使用:
CREATE OR REPLACE TRIGGER my_trigger
BEFORE LOGON ON DATABASE
BEGIN
— Your trigger code here
END;
/