Oracle 如何处理触发器中的异常
我想在触发器中添加异常处理 我创建了触发器,如下所示 我想在其中添加异常处理。这样,如果有任何无效条件,我的触发器就不会失败Oracle 如何处理触发器中的异常,oracle,plsql,exception-handling,database-trigger,Oracle,Plsql,Exception Handling,Database Trigger,我想在触发器中添加异常处理 我创建了触发器,如下所示 我想在其中添加异常处理。这样,如果有任何无效条件,我的触发器就不会失败 CREATE OR REPLACE TRIGGER system_notification_audit AFTER INSERT OR UPDATE on system_notification FOR EACH ROW begin insert into system_notification_log select :NEW.I
CREATE OR REPLACE TRIGGER system_notification_audit
AFTER
INSERT OR
UPDATE
on system_notification
FOR EACH ROW
begin
insert into system_notification_log
select :NEW.ID , :NEW.NAME, :NEW.Description, :NEW.PREFERENCE, :NEW.FREQUENCY,
:NEW.IS_HIGH, :NEW.IS_REQUIRED, :NEW.UPDATED_BY, :NEW.UPDATED_DATE
from dual
where :OLD.PREFERENCE <> :NEW.PREFERENCE
OR :OLD.FREQUENCY <> :NEW.FREQUENCY OR :NEW.IS_HIGH <> :OLD.IS_HIGH OR :NEW.IS_REQUIRED <> :OLD.IS_REQUIRED;
END;
简单地忽略异常并不总是设计程序的好方法。至少把错误记录在某个地方,以便以后观察 请注意,可以使用简单的INSERT重写INSERT语句,而不需要select和IF条件
CREATE OR REPLACE TRIGGER system_notification_audit AFTER
INSERT OR UPDATE ON system_notification
FOR EACH ROW
BEGIN
IF
:old.preference <>:new.preference OR :old.frequency <>:new.frequency
OR :new.is_high <>:old.is_high OR :new.is_required <>:old.is_required
THEN
INSERT INTO system_notification_log (
id,
name,
description,
preference,
frequency,
is_high,
is_required,
updated_by,
updated_date
) VALUES (
:new.id,
:new.name,
:new.description,
:new.preference,
:new.frequency,
:new.is_high,
:new.is_required,
:new.updated_by,
:new.updated_date
);
END IF;
EXCEPTION WHEN OTHERS THEN
pr_trigger_logs(trig_name => 'system_notification_audit',
err_msg => DBMS_UTILITY.FORMAT_ERROR_BACKTRACE());
-- calling an error logging procedure.
END;
/
我不会给你过程触发日志的定义。作为练习,我会让你想出它的 当别人说某事时,你会例外。。;