我写了一个商店程序。它正确执行,但是当我调用该过程时,它显示错误:
错误代码:1327未声明的变量: 第三
请参阅以下程序:
DELIMITER $$
USE `db_test`$$
DROP PROCEDURE IF EXISTS `test_proc`$$
CREATE DEFINER=`root`@`localhost` PROCEDURE `test_proc`(IN newsInfoTable VARCHAR(100))
BEGIN
SET @sql_stam = CONCAT('SELECT news INTO ', @news,' FROM ',newsInfoTable,' WHERE ',CURDATE(),'=?;');
PREPARE s1 FROM @sql_stam;
SET @where_param = DATE_FORMAT(date_time,'%Y-%m-%d');
EXECUTE s1 USING @where_param;
SELECT @news;
END$$
DELIMITER ;
调用参数:
USE db_test;
CALL test_proc('tbl_morning_news');
答案 0 :(得分:0)
将您的代码更改为:
DELIMITER $$
USE `db_test`$$
DROP PROCEDURE IF EXISTS `test_proc`$$
CREATE DEFINER=`root`@`localhost` PROCEDURE `test_proc`(IN newsInfoTable VARCHAR(100))
BEGIN
SET @sql_stam = CONCAT( 'SELECT news INTO @news FROM ',newsInfoTable
,' WHERE DATE(`date_time`) = CURDATE()' );
PREPARE s1 FROM @sql_stam;
SELECT @news;
END$$
DELIMITER ;