Oracle 甲骨文触发器从不开火

我有以下表格

create table Surveys ( 
    survey_id int, 
    cid int, 
    num_submitted int, 
    sum_q1 int, 
    sum_q2 int, 
    sum_q3 int, 
    sum_q4 int,
    constraint pk_survey primary key (survey_id),
    constraint fk_courses foreign key (cid) 
        references Courses(cid)
);

create table Surveydata ( 
    survey_id int,  
    sid int,
    submit_time date,
    q1 int, 
    q2 int, 
    q3 int, 
    q4 int, 
    q5_str varchar(250),
    constraint pk_survey_data primary key (survey_id, sid),
    constraint fk_sdata_surveys foreign key (survey_id) 
        references Surveys(survey_id),
    constraint fk_sdata_students foreign key (sid) 
        references Students(sid)
);

扳机呢

CREATE OR REPLACE TRIGGER survey_data_trigger
    AFTER INSERT OR UPDATE OR DELETE ON SURVEYDATA
    FOR EACH ROW

    BEGIN
        IF INSERTING THEN
            UPDATE Surveys SET
                num_submitted = num_submitted + 1, 
                sum_q1 = sum_q1 + :new.q1,
                sum_q2 = sum_q2 + :new.q2,
                sum_q3 = sum_q3 + :new.q3,
                sum_q4 = sum_q4 + :new.q4
            WHERE
                survey_id = :new.survey_id;
        END IF;

        IF UPDATING THEN
            IF(:new.survey_id = :old.survey_id) THEN
                UPDATE Surveys SET
                    sum_q1 = sum_q1 - :old.q1 + :new.q1,
                    sum_q2 = sum_q2 - :old.q2 + :new.q2,
                    sum_q3 = sum_q3 - :old.q3 + :new.q3,
                    sum_q4 = sum_q4 - :old.q4 + :new.q4
                WHERE
                    survey_id = :new.survey_id;
            ELSE
                UPDATE Surveys SET
                    num_submitted = num_submitted + 1, 
                    sum_q1 = sum_q1 + :new.q1,
                    sum_q2 = sum_q2 + :new.q2,
                    sum_q3 = sum_q3 + :new.q3,
                    sum_q4 = sum_q4 + :new.q4
                WHERE
                    survey_id = :new.survey_id; 

                UPDATE Surveys SET
                    num_submitted = num_submitted - 1, 
                    sum_q1 = sum_q1 - :old.q1,
                    sum_q2 = sum_q2 - :old.q2,
                    sum_q3 = sum_q3 - :old.q3,
                    sum_q4 = sum_q4 - :old.q4
                WHERE
                    survey_id = :old.survey_id;
                END IF;

        END IF;

        IF DELETING THEN
            UPDATE Surveys SET
                num_submitted = num_submitted - 1, 
                sum_q1 = sum_q1 - :old.q1,
                sum_q2 = sum_q2 - :old.q2,
                sum_q3 = sum_q3 - :old.q3,
                sum_q4 = sum_q4 - :old.q4
            WHERE
                survey_id = :old.survey_id;
        END IF;
    END;
/

当我发布

INSERT INTO Surveydata VALUES(1, 1, SYSDATE, 5, 5, 5, 5, 'Great teacher!');

---

触发器不会触发并更新此Surveydata记录指向的测量记录。我在这里做错了什么？

您的触发器只有在有效的情况下才会触发-也就是说，它是在没有错误的情况下创建的，并且此后没有以阻止它成功重新编译的方式失效-并且是启用的。您可以在

user\u objects

表中检查有效性：

select status
from user_objects
where object_type = 'TRIGGER' and object_name = 'SURVEY_DATA_TRIGGER';

select text
from user_errors
where type = 'TRIGGER' and name = 'SURVEY_DATA_TRIGGER'
order by sequence;

如果这表明触发器是无效的，您可以在

用户错误表中看到它有哪些错误：

select status
from user_objects
where object_type = 'TRIGGER' and object_name = 'SURVEY_DATA_TRIGGER';

select text
from user_errors
where type = 'TRIGGER' and name = 'SURVEY_DATA_TRIGGER'
order by sequence;

。。。然后用正确的代码重新创建它。但由于，它可能对您有效，因此被禁用，您可以通过以下方式进行检查：

select status
from user_triggers
where trigger_name = 'SURVEY_DATA_TRIGGER';

如果这表示它已禁用

，则可以通过以下方式启用它：

alter trigger survey_data_trigger enable;

但是，触发器创建代码不会将其创建为禁用状态，因此，如果它处于该状态，则可能有另一个步骤显式禁用它。我想不出任何东西会自动禁用一个新的触发器，除非你有一个DDL触发器正在改变所有新创建的触发器的状态，但是你可能知道这一点，并且你可以很容易地测试它。看起来更有可能是你自己禁用了它

---

*嗯，有一个隐藏的init参数，

\u system\u trig\u enabled

，这将使它被创建为禁用，但设置该参数似乎也不太可能。

触发器编译成功了吗，它启用了吗？（您可以签入

user\u对象

和

user\u触发器

）提交的

num\u和
sum\u q1
<假设您从非空值开始，这可能是Luke暗示的（我猜？）。@AlexPoole触发器编译并安装成功。在user_对象和user_触发器中有一个条目。@Luke Woodward在插入之前和之后，调查中的值都设置为0。我不确定为什么在创建时禁用它。触发器用于一个类项目，并在我所在大学管理的Oracle实例上运行。ALTERTRIGGER语句成功了。再次感谢你的帮助，亚历克斯。