哪里出错？

Question

请帮我找出错误的地方？

delimiter //
CREATE FUNCTION `count_photos_in_gallery`(`tmp_gallery_id` INT(11) NOT NULL) RETURNS TINYINT(3) UNSIGNED
BEGIN
    DECLARE `tmp_count` TINYINT(3) UNSIGNED DEFAULT 0;

    SELECT COUNT(`id`) INTO `tmp_count` FROM `photos_items` WHERE `gallery_id`=`tmp_gallery_id` LIMIT 1;

    RETURN `tmp_count`;
END//

错误：

  

1064 - 您的SQL语法出错;检查与MySQL服务器版本对应的手册，以获得正确的语法   'NOT NULL附近'返回TINYINT（3）UNSIGNED BEGIN DECLARE tmp_count   TINYINT（3）UNSI'在第1行

Answer 1

更改函数声明，参数不能有NOT NULL选项 -

...
CREATE FUNCTION `count_photos_in_gallery`(`tmp_gallery_id` INT(11))
  RETURNS TINYINT(3) UNSIGNED
...

Answer 2

试试这个

DELIMITER //
CREATE FUNCTION `count_photos_in_gallery`(`tmp_gallery_id` INT(11)) RETURNS TINYINT(3) UNSIGNED
BEGIN
    DECLARE `tmp_count` TINYINT(3) UNSIGNED DEFAULT 0;

    SELECT COUNT(`id`) INTO `tmp_count` FROM `photos_items` WHERE `gallery_id`=`tmp_gallery_id` LIMIT 1;

    RETURN `tmp_count`;
END//