Oracle中创建触发器

Question

在Oracle数据库：我尝试以下查询：

CREATE or REPLACE TRIGGER myTrigger 
AFTER UPDATE OR INSERT ON product 
REFERENCING NEW AS NEW 
FOR EACH ROW 
BEGIN 

    INSERT INTO h_product 
    (
     H_PRODUCT_ID, 
     PRODUCT_ID  
    ) 
    VALUES 
    (
     seq_h_product.nextval, 
     :new.product_id 
    ); 

END 

当我执行，我得到这个错误：

3:56:45 [UPDATE - 0 row(s), 0.000 secs] [Error Code: 4098, SQL State: 42000] ORA-04098: Déclencheur 'NEILA.myTrigger' non valide. Echec de la revalidation 

我执行：

select object_name 
from dba_objects 
where object_type = 'TRIGGER' 
and status = 'INVALID'; 

=>我在列表中获得myTrigger！ 为什么它无效？

Answer 1

请根据你已经错过:new.product_id

CREATE or REPLACE TRIGGER myTrigger 
AFTER UPDATE OR INSERT ON product 
REFERENCING NEW AS NEW 
FOR EACH ROW 
BEGIN 

    INSERT INTO h_product 
    (
     H_PRODUCT_ID, 
     PRODUCT_ID  
    ) 
    VALUES 
    (
     seq_h_product.nextval, 
     :new.product_id 
    ); 

END; 
/