MySQL:存储过程中的IF [英] MySQL: IF in stored procedure

问题描述

我只是用存储过程弄湿了.根据我所见的教程，这应该是有效的(MySQL 5.5):

I am just getting my feet wet with stored procedures. According to the tutorials that I have seen, this should be valid (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，它会引发此错误:

However, it is throwing this error:

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

我的语法哪里有错误?

谢谢.

推荐答案

您缺少分号

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;

这篇关于MySQL:存储过程中的IF的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！