MySQL:IF 在存储过程中

我只是被存储过程弄湿了。根据我看过的教程，这应该是有效的(MySQL 5.5):

CREATE PROCEDURE someFunction ( a VARCHAR(256),  b VARCHAR(256) )
    BEGIN
        DECLARE haveAllVariables INT;
        SET haveAllVariables = 1;

    IF     a = "" THEN SET haveAllVariables = 0
    ELSEIF b = "" THEN SET haveAllVariables = 0
    END IF;

但是，它抛出了这个错误:

ERROR 1064 (42000): 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 'ELSEI
F b = "" THEN SET haveAllVariables = 0

我的语法错误在哪里？

谢谢。

最佳答案

你少了一个分号

CREATE PROCEDURE someFunction ( a VARCHAR(256),  b VARCHAR(256) )
    BEGIN
        DECLARE haveAllVariables INT;
        SET haveAllVariables = 1;

    IF     a = "" THEN SET haveAllVariables = 0;
    ELSEIF b = "" THEN SET haveAllVariables = 0;
    END IF;

关于MySQL:IF 在存储过程中，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/9649797/