MySQl错误＃1064存储过程如果ELSE有多个SELECT语句

Question

我在GoDaddy上通过phyMyAdmin使用MySQL。我可以执行此语句，并返回一个整数值，没有任何问题：

SELECT DISTINCT `runNumber` FROM RideSlot WHERE (timeRange = 2) LIMIT 0,1;

但是，当我尝试创建以下存储过程时，出现以下错误：

  

1064 - 您的SQL语法出错;检查与MySQL服务器版本对应的手册，以便在第25行

附近使用正确的语法

DROP PROCEDURE IF EXISTS `spGetPreferredRunNumbers`$$
CREATE PROCEDURE `spGetPreferredRunNumbers`(IN prefTimeRange INT(4), INOUT run1 INT(4), INOUT run2 INT(4), INOUT run3 INT(4), INOUT run4 INT(4), INOUT run5 INT(4))
BEGIN
IF (prefTimeRange = 2) THEN BEGIN
SELECT DISTINCT `runNumber` FROM RideSlot WHERE (timeRange = prefTimeRange) LIMIT 0,1  INTO run1;
SELECT DISTINCT `runNumber` FROM RideSlot WHERE (timeRange = prefTimeRange) LIMIT 1,1  INTO run2;
SELECT DISTINCT `runNumber` FROM RideSlot WHERE (timeRange = prefTimeRange) LIMIT 2,1  INTO run3;
SELECT DISTINCT `runNumber` FROM RideSlot WHERE (timeRange = prefTimeRange) LIMIT 3,1  INTO run4;
SET run5 = -1;
END;
ELSE IF (prefTimeRange = 3) THEN BEGIN
SELECT DISTINCT `runNumber` FROM RideSlot WHERE (timeRange = prefTimeRange) LIMIT 0,1  INTO run1;
SELECT DISTINCT `runNumber` FROM RideSlot WHERE (timeRange = prefTimeRange) LIMIT 1,1  INTO run2;
SELECT DISTINCT `runNumber` FROM RideSlot WHERE (timeRange = prefTimeRange) LIMIT 2,1  INTO run3;
SELECT DISTINCT `runNumber` FROM RideSlot WHERE (timeRange = prefTimeRange) LIMIT 3,1  INTO run4;
SET run5 = -1;
END;
ELSE BEGIN
SELECT DISTINCT `runNumber` FROM RideSlot WHERE (timeRange = prefTimeRange) LIMIT 0,1  INTO run1;
SELECT DISTINCT `runNumber` FROM RideSlot WHERE (timeRange = prefTimeRange) LIMIT 1,1  INTO run2;
SELECT DISTINCT `runNumber` FROM RideSlot WHERE (timeRange = prefTimeRange) LIMIT 2,1  INTO run3;
SELECT DISTINCT `runNumber` FROM RideSlot WHERE (timeRange = prefTimeRange) LIMIT 3,1  INTO run4;
SELECT DISTINCT `runNumber` FROM RideSlot WHERE (timeRange = prefTimeRange) LIMIT 4,1  INTO run5;
END;
END IF;
END$$
DELIMITER;

是的，我已经单独测试了具有不同限制的其他select语句，它们也可以正常工作，除非在选择LIMIT 4,1时使用2或3作为prefTimeRange。 prefTimeRange的2＆amp; 3只返回4个结果，所以如果prefTimeRange是2或3，我将-1分配给run5。

无论我是否这样做，我都会得到同样的错误：prefTimeRange = 3或者：prefTimeRange = "3"

是的，我记得告诉phpMyAdmin正确的分隔符是$$。

我错过了什么？

Answer 1

解决：事实证明ELSE和IF之间的空间需要删除！

Answer 2

这是一个非常糟糕的mysql问题，没有正确记录的地方。 MYSQL存储过程 - 如果在ELSE之前留下额外的行或空格，则else部分不执行任何操作。

IF <your condition> then
<do this code>
                   <-- extra empty line
ELSE
<this always executes no matter what is in IF statement>

在上面的示例中 - 如果在ELSE上面留空行，则else部分始终执行。不要将额外线路放在if-else的其他部分之上。