mysql 存储过程的问题
网络编程 2021-07-05 15:27www.168986.cn编程入门
最近我接触了一本php 与 mysql,老外写的一本书,书中有个tshirtshop网店代码,其中操作数据库的大多用的是mysql存储过程
一开始用phpMyAdmin来执行,后来出现一堆错误,后来去掉了begin,end之后可以正常执行,但要执行存储过程,在phpMyAdmn中不行,而在mysql命令行文本框中就可以。
接下来又遇到更难的问题,在存储过程中加入预处理语句,更不行了,在mysql命令行文本框下执行同样,狼蚁网站SEO优化的运行记录,给大家参考,能否有高手来帮助。
mysql> CREATE PROCEDURE catalog_get_products_in_category(
-> IN inCategoryId INT, IN inShortProductDescriptionLength INT,
-> IN inProductsPerPage INT, IN inStartItem INT)
-> begin
-> SELECT p.product_id, p.name,IF(LENGTH(p.description) <= inShortProductD
escriptionLength, p.description,
-> CONCAT(LEFT(p.description, inShortProductDescriptionLength),'...')) AS
description, p.price, p.discounted_price, p.thumbnail
-> FROM product p INNER JOIN product_category pc ON p.product_id = pc.pro
duct_id
-> WHERE pc.category_id = inCategoryId
-> ORDER BY p.display DESC
-> LIMIT inStartItem;inProductsPerPage;
-> end$$
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use near 'inSta
rtItem;inProductsPerPage;
end' at line 10
//原本的存储过程语句
EATE PROCEDURE catalog_get_products_in_category(
IN inCategoryId INT, IN inShortProductDescriptionLength INT,
IN inProductsPerPage INT, IN inStartItem INT)
BEGIN
PREPARE statement FROM
"SELECT p.product_id, p.name,IF(LENGTH(p.description) <= ?, p.description,
CONCAT(LEFT(p.description, ?),'...')) AS description, p.price, p.discounted_price, p.thumbnail
FROM product p INNER JOIN product_category pc ON p.product_id = pc.product_id
WHERE pc.category_id = ?
ORDER BY p.display DESC
LIMIT ?, ?";
SET @p1 = inShortProductDescriptionLength;
SET @p2 = inShortProductDescriptionLength;
SET @p3 = inCategoryId;
SET @p4 = inStartItem;
SET @p5 = inProductsPerPage;
EXECUTE statement USING @p1, @p2, @p3, @p4, @p5;
END$$
mysql> delimiter $$
mysql> CREATE PROCEDURE catalog_get_products_in_category(
-> IN inCategoryId INT, IN inShortProductDescriptionLength INT,
-> IN inProductsPerPage INT, IN inStartItem INT)
-> BEGIN
-> PREPARE statement FROM
-> "SELECT p.product_id, p.name,IF(LENGTH(p.description) <= ?, p.descript
ion,
"> CONCAT(LEFT(p.description, ?),'...')) AS description, p.price, p.disco
unted_price, p.thumbnail
"> FROM product p INNER JOIN product_category pc ON p.product_id = pc.pro
duct_id
"> WHERE pc.category_id = ?
"> ORDER BY p.display DESC
"> LIMIT ?, ?";
-> SET @p1 = inShortProductDescriptionLength;
-> SET @p2 = inShortProductDescriptionLength;
-> SET @p3 = inCategoryId;
-> SET @p4 = inStartItem;
-> SET @p5 = inProductsPerPage;
-> EXECUTE statement USING @p1, @p2, @p3, @p4, @p5;
-> END$$
ERROR 1314 (0A000): PREPARE is not allowed in stored procedures
上面有两个存储过程,一个不用预处理语句,一个用了预处理语句,
之后,向作者发过邮件,没有答复,又给mysql官方发过邮件,同样没答复。现今只能求助诸位高人。
接下来又遇到更难的问题,在存储过程中加入预处理语句,更不行了,在mysql命令行文本框下执行同样,狼蚁网站SEO优化的运行记录,给大家参考,能否有高手来帮助。
代码如下:
mysql> CREATE PROCEDURE catalog_get_products_in_category(
-> IN inCategoryId INT, IN inShortProductDescriptionLength INT,
-> IN inProductsPerPage INT, IN inStartItem INT)
-> begin
-> SELECT p.product_id, p.name,IF(LENGTH(p.description) <= inShortProductD
escriptionLength, p.description,
-> CONCAT(LEFT(p.description, inShortProductDescriptionLength),'...')) AS
description, p.price, p.discounted_price, p.thumbnail
-> FROM product p INNER JOIN product_category pc ON p.product_id = pc.pro
duct_id
-> WHERE pc.category_id = inCategoryId
-> ORDER BY p.display DESC
-> LIMIT inStartItem;inProductsPerPage;
-> end$$
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use near 'inSta
rtItem;inProductsPerPage;
end' at line 10
//原本的存储过程语句
EATE PROCEDURE catalog_get_products_in_category(
IN inCategoryId INT, IN inShortProductDescriptionLength INT,
IN inProductsPerPage INT, IN inStartItem INT)
BEGIN
PREPARE statement FROM
"SELECT p.product_id, p.name,IF(LENGTH(p.description) <= ?, p.description,
CONCAT(LEFT(p.description, ?),'...')) AS description, p.price, p.discounted_price, p.thumbnail
FROM product p INNER JOIN product_category pc ON p.product_id = pc.product_id
WHERE pc.category_id = ?
ORDER BY p.display DESC
LIMIT ?, ?";
SET @p1 = inShortProductDescriptionLength;
SET @p2 = inShortProductDescriptionLength;
SET @p3 = inCategoryId;
SET @p4 = inStartItem;
SET @p5 = inProductsPerPage;
EXECUTE statement USING @p1, @p2, @p3, @p4, @p5;
END$$
mysql> delimiter $$
mysql> CREATE PROCEDURE catalog_get_products_in_category(
-> IN inCategoryId INT, IN inShortProductDescriptionLength INT,
-> IN inProductsPerPage INT, IN inStartItem INT)
-> BEGIN
-> PREPARE statement FROM
-> "SELECT p.product_id, p.name,IF(LENGTH(p.description) <= ?, p.descript
ion,
"> CONCAT(LEFT(p.description, ?),'...')) AS description, p.price, p.disco
unted_price, p.thumbnail
"> FROM product p INNER JOIN product_category pc ON p.product_id = pc.pro
duct_id
"> WHERE pc.category_id = ?
"> ORDER BY p.display DESC
"> LIMIT ?, ?";
-> SET @p1 = inShortProductDescriptionLength;
-> SET @p2 = inShortProductDescriptionLength;
-> SET @p3 = inCategoryId;
-> SET @p4 = inStartItem;
-> SET @p5 = inProductsPerPage;
-> EXECUTE statement USING @p1, @p2, @p3, @p4, @p5;
-> END$$
ERROR 1314 (0A000): PREPARE is not allowed in stored procedures
上面有两个存储过程,一个不用预处理语句,一个用了预处理语句,
之后,向作者发过邮件,没有答复,又给mysql官方发过邮件,同样没答复。现今只能求助诸位高人。
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