Oracle程序将值增加到设定量以下

Question

我希望创建一个可以调用的存储过程，以便按传入的数量增加工作人员的工资。首先应创建一个保存点，然后检查新工资是否低于设定的阈值并回滚到保存点。它高于门槛。

-- Raise the Salary of the Staff memeber passed in by the amount specified
  CREATE OR REPLACE PROCEDURE RAISE (Selection IN Staff.StaffID%TYPE, amount IN Number)
  IS
  BEGIN
   SAVEPOINT save;
   UPDATE Staff 
   -- increase the salary by amount
   SET Staff.Salary =  (Staff.Salary + amount)
   -- Where StaffID is the one passed in
   WHERE Staff.StaffID = Selection;

   -- If the new value for salary is greater than 100000
   IF ( (Staff.Salary) > 100000 )
   -- Rollback and undo the changes
   THEN ROLLBACK TO save;
   -- Print out a message stating this is against business rules etc...
 END IF;
END;
/

上面的代码给了我以下错误：

我用(:NEW.Salary > 100000)尝试了上面的代码但是这给了我一个关于New.Salary的错误绑定错误。

有没有人有任何建议？我想我最有可能通过在员工表上更改前触发来复制此功能，但为什么上述代码不起作用？

谢谢！

Answer 1

我最终使用一个程序来创建保存并提高工资，然后是一个函数，它检查传入的工资与阈值并返回0或1到程序，然后回滚到之前的保存如果有必要的话。

-- Raise the Salary of the Staff memeber passed in by the amount specified
CREATE OR REPLACE PROCEDURE Raise1 (Selection IN Staff.StaffID%TYPE, amount IN Number)
-- Procedure that takes in StaffID and an amount to increase the staff salary by
IS
BEGIN
  SAVEPOINT save;
   UPDATE Staff 
   -- increase the salary by amount
    SET Staff.Salary =  (Staff.Salary + amount)
    -- Where StaffID is the one passed in
    WHERE Staff.StaffID = Selection;
    -- Pass control to the chekraise procedure, which will rollback to the 
    -- SAVEPOINT created above if the wage is above 100000 in accordance with business rules
    IF ( CheckRaise(Selection) = 0)
    THEN
    ROLLBACK TO save;
     DBMS_OUTPUT.PUT_LINE('Reverted Raise as wage exceeded 100000.');
     END IF;
END;
/

CREATE OR REPLACE Function CheckRaise (Selection IN Staff.StaffID%TYPE)
RETURN NUMBER 
IS
  -- Create a variable, to hold the salary we're checking
  Sal NUMBER(10);
BEGIN
    -- Select the Staff.Salary that was just passed in into the sal variable
    SELECT Staff.Salary INTO Sal FROM Staff WHERE Staff.StaffID = Selection;
    -- If sal is above threshold
    IF (Sal >= 100000) 
    THEN
      -- Return 0, which the procedure will interpret as "Rollback"
      RETURN 0;
    ELSIF (Sal < 100000)
    THEN
      RETURN 1;
    END IF;
  EXCEPTION
  WHEN OTHERS THEN
  raise_application_error(-20001, 'Uh oh Error - '||SQLCODE||' Unexpected error     '||SQLERRM);
END;
/