MySQL CREATE FUNCTION 语法

问题描述

我正在尝试在 MySQL 中创建一个函数:

I am trying to create a function in MySQL:

这里是SQL代码:

CREATE FUNCTION F_Dist3D (x1 decimal, y1 decimal) 
RETURNS decimal
DETERMINISTIC
BEGIN 
 DECLARE dist decimal;
 SET dist = SQRT(x1 - y1);
 RETURN dist;
END;

我收到以下错误:

#1064 - 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 10

我在 phpMyAdmin 中运行这个 create 语句.这个功能有什么问题?

I am running this create statement in phpMyAdmin. What is wrong with this function?

推荐答案

你必须用 $$ 之类的东西覆盖你的 ; 分隔符，以避免这种错误.

You have to override your ; delimiter with something like $$ to avoid this kind of error.

在函数定义之后，您可以将分隔符重新设置为 ;.

After your function definition, you can set the delimiter back to ;.

这应该有效:

DELIMITER $$
CREATE FUNCTION F_Dist3D (x1 decimal, y1 decimal) 
RETURNS decimal
DETERMINISTIC
BEGIN 
  DECLARE dist decimal;
  SET dist = SQRT(x1 - y1);
  RETURN dist;
END$$
DELIMITER ;

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