我正在尝试检查输入长度,看看它是否小于 7。它应该显示一条错误消息,但下面的代码不起作用。它出什么问题了?
CREATE OR REPLACE PROCEDURE prc_staffContact(IN_staffID IN CHAR, IN_staffContact IN VARCHAR) IS
v_staffName VARCHAR(50);
v_staffID CHAR(6);
v_staffContact VARCHAR(11);
BEGIN
SELECT s.staffName, s.staffID, s.staffContact
INTO v_staffName, v_staffID, v_staffContact
FROM staff s
WHERE staffID = IN_staffID;
IF (LENGTH(IN_staffContact) < 7 )
THEN
DBMS_OUTPUT.PUT_LINE('Error. Contact number at least 7 digits.');
ELSE
UPDATE staff
SET staffContact = IN_staffContact
WHERE staffID = IN_staffID;
DBMS_OUTPUT.PUT_LINE('=============================================================================');
DBMS_OUTPUT.PUT_LINE('The contact number of [ ' ||v_staffName || ' ] has been updated successfully.');
DBMS_OUTPUT.PUT_LINE('New contact number: [ ' ||v_staffContact || ' ].');
DBMS_OUTPUT.PUT_LINE('=============================================================================');
END IF;
END;
/