无法创建存储函数 - 语法错误？

Question

我有以下问题.

我想创建一个存储函数,将entity_id转换为相应的sku

这是代码:

CREATE FUNCTION `id2sku`(`entity_id_in` INT)
    RETURNS VARCHAR
    LANGUAGE SQL
    NOT DETERMINISTIC
    CONTAINS SQL
    SQL SECURITY DEFINER
    COMMENT ''
BEGIN
    DECLARE returnvalue varchar(50);

    SELECT `sku` INTO returnvalue FROM catalog_product_entity WHERE entity_id = entity_id_in LIMIT 1;

    return returnvalue;
END

现在我的问题是,如果我触发查询,我收到以下消息:[窗口标题]错误

SQL Error (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 'LANGUAGE SQL
NOT DETERMINISTIC
CONTAINS SQL
SQL SECURITY DEFINER
COMMENT' at line 3

db im using是MySQL 5.0.51a

提前感谢您的想法.

Answer 1

默认情况下,MySQL ;用作分隔符,因此当它遇到第;9行时:

 DECLARE returnvalue varchar(50);

MySQL认为命令结束 - 它正在尝试执行:

CREATE FUNCTION `id2sku`(`entity_id_in` INT)
    RETURNS VARCHAR(50)
    LANGUAGE SQL
    NOT DETERMINISTIC
    CONTAINS SQL
    SQL SECURITY DEFINER
    COMMENT ''
BEGIN
    DECLARE returnvalue varchar(50);

这是无效的SQL.

设置一个新的分隔符:

 DELIMITER $$

 CREATE FUNCTION `id2sku`(`entity_id_in` INT)
    RETURNS VARCHAR(50)
    LANGUAGE SQL
    NOT DETERMINISTIC
    CONTAINS SQL
    SQL SECURITY DEFINER
    COMMENT ''
BEGIN
    DECLARE returnvalue varchar(50);

    SELECT `sku` INTO returnvalue FROM catalog_product_entity WHERE entity_id = entity_id_in LIMIT 1;

    return returnvalue;
END
$$

然后,您可以使用以下命令更改分隔符:

DELIMITER ;