这里我写了一个mysql程序,它选择text
指定数据库'wp'的所有类型字段
我想通过CONCAT函数更新每个附加额外字符串的文本类型字段行。
在我调用 test2后,错误显示:
Query : call test2()
Error Code : 1146
Table 'wp._tbl' doesn't exist
Execution Time : 00:00:00:000
Transfer Time : 00:00:00:000
Total Time : 00:00:00:000
---------------------------------------------------
mysql 将_tbl视为字符串而不是变量。
那我可以纠正这个吗?
代码:
DELIMITER $$
USE `wp`$$
DROP PROCEDURE IF EXISTS `test2`$$
CREATE
PROCEDURE `test2`()
BEGIN
DECLARE _tbl VARCHAR(100);
DECLARE _cl VARCHAR(100);
DECLARE notFound INT DEFAULT 0;
DECLARE cur CURSOR FOR SELECT table_name,column_name FROM information_schema.columns WHERE table_schema = 'wp' AND data_type ='text';
DECLARE CONTINUE HANDLER FOR NOT FOUND SET notFound =1;
OPEN cur;
WHILE notFound = 0 DO
FETCH cur INTO _tbl,_cl;
UPDATE _tbl SET _cl = CONCAT(_cl,'extra string goes here.....');
IF NOT noFound THEN SET notFound = 0;
END IF;
END WHILE;
CLOSE cur;
END$$
DELIMITER ;