遇到“警告：触发器因编译错误而创建”同时创建多个触发器

编程问答 2022-06-13

问题描述

我试图在一个sql文件中创建多个触发器。代码如下：

CREATE OR REPLACE TRIGGER trigger_selling_price_change
AFTER INSERT OR UPDATE ON SellingPrice
FOR EACH ROW
BEGIN
    dbms_output.put_line('price of phone updated');
    INSERT INTO LogSellingPriceChange
    VALUES(sysdate,phone_id,:old.price,:new.price);
END;
/


CREATE OR REPLACE TRIGGER trigger_purchase_cost_change
AFTER INSERT OR UPDATE ON PurchaseCost
FOR EACH ROW
BEGIN
    dbms_output.put_line('purchase cost updated');
    INSERT INTO LogPurchaseCostChange
    VALUES(sysdate,:old.cost,:new.cost);
END;
/

CREATE OR REPLACE TRIGGER trigger_inventory_addition
AFTER INSERT ON Inventory
FOR EACH ROW
BEGIN
    dbms_output.put_line('enlisted new phones in database');
    INSERT INTO LogInventoryAddition
    VALUES(sysdate,:old.quantity,:new.quantity);
END;
/

但是当我在pl / sql中执行它时，我得到Warning: Trigger created with compilation errors.的三倍。

执行show_errors后，我得到以下输出：

Errors for TRIGGER TRIGGER_INVENTORY_ADDITION:

LINE/COL ERROR
-------- -----------------------------------------------------------------
3/2      PL/sql: sql Statement ignored
4/18     PL/sql: ORA-00984: column not allowed here

查询中包含的表的声明如下：

CREATE TABLE Inventory(
    id number,phone_id number,quantity number,PRIMARY KEY (id),FOREIGN KEY (phone_id) REFERENCES Phone(id)
);

CREATE TABLE PurchaseCost(
    id number,cost number,PRIMARY KEY(id),FOREIGN KEY (phone_id) REFERENCES Phone(id)
);

CREATE TABLE SellingPrice(
    id number,price number,FOREIGN KEY (phone_id) REFERENCES Phone(id)
);

CREATE TABLE LogSellingPriceChange(
    change_date date,old_price number,new_price number,FOREIGN KEY(phone_id) REFERENCES Phone(id)
);

CREATE TABLE LogPurchaseCostChange(
    change_date date,FOREIGN KEY(phone_id) REFERENCES Phone(id)
);

CREATE TABLE LogInventoryAddition(
    addition_date date,old_quantity number,new_quantity number,FOREIGN KEY(phone_id) REFERENCES Phone(id)
);

成功创建表后，我执行了用于创建触发器的文件。但是，我没有插入任何值。

解决方法

“不允许列”错误，因为您正尝试在没有伪密钥phone_id或:new的情况下直接访问:old列，

CREATE OR REPLACE TRIGGER trigger_selling_price_change
AFTER INSERT OR UPDATE ON SellingPrice
FOR EACH ROW
BEGIN
    dbms_output.put_line('price of phone updated');
    INSERT INTO LogSellingPriceChange
    VALUES(sysdate,:new.phone_id,:old.price,:new.price);
END;
/

您还需要更改其他触发器。

oracleoracle10gplsqltriggers