php - 在“附近触发Mysql错误

Question

我正在尝试创建一个触发器，但它给了我一个错误，我无法理解它的原因。在我的本地服务器中，它运行良好，而在远程服务器中则不能。
两个MySQL版本相同，MySQL 5.1.48。

触发代码如下:

CREATE TRIGGER actualizar_cliente
BEFORE UPDATE ON cliente FOR EACH ROW BEGIN
IF NEW.password = "" THEN
    SET NEW.password = OLD.password;
ELSEIF NEW.password IS NULL THEN
    SET NEW.password = (MD5(NEW.password));
END IF;
END

这是错误信息:

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 4

Answer 1

DELIMITER $$

CREATE TRIGGER actualizar_cliente
BEFORE UPDATE ON cliente FOR EACH ROW BEGIN
IF NEW.password = "" THEN
    SET NEW.password = OLD.password;
ELSEIF NEW.password IS NULL THEN
    SET NEW.password = (MD5(NEW.password));
END IF;
END

$$
DELIMITER ;

你可能需要IS NOT NULL:

ELSEIF NEW.password IS NOT NULL THEN