Question

如果Prog_Type = 'EPISODE'，我正在尝试创建触发器。我收到一个错误的绑定错误 - PLS - 000049.我相信我的DECLARE州有问题

CREATE OR REPLACE TRIGGER Seas_Pk_Trigger
BEFORE INSERT OR UPDATE OF Seas_ID ON Season_Table
FOR EACH ROW
DECLARE 
Prog_Type VARCHAR2(7);
BEGIN
IF (:OLD.Prog_Type <> 'EPISODE')
THEN SELECT Seas_ID_Seq.nextval into :new.Seas_ID from dual;
END IF;
END Seas_Pk_Trigger;
/

Answer 1

如果要引用表中的列，则无需声明列Prog_Type以使用:OLD或:NEW伪记录引用它。如果Prog_Type在您的表中（我假设它是），那么只需省略声明：

CREATE OR REPLACE TRIGGER Seas_Pk_Trigger
BEFORE INSERT OR UPDATE OF Seas_ID ON Season_Table
FOR EACH ROW
BEGIN
IF (:OLD.Prog_Type <> 'EPISODE')
THEN SELECT Seas_ID_Seq.nextval into :new.Seas_ID from dual;
END IF;
END Seas_Pk_Trigger;
/

我不确定如何解释你的陈述，你只希望在Prog_Type = 'EPISODE'触发{EPESODE <>时触发它？

SQL触发器绑定错误

1 个答案: