CREATE PROCEDURE `gk_test`()
COMMENT '测试数据' -- 函数注释
BEGIN
DECLARE done INT DEFAULT FALSE; -- 定义遍历数据结束标志。非游标变量，需要定义在游标变量前
DECLARE m_id CHAR(32); -- 定义接收游标数据中id变量
DECLARE m_or VARCHAR(255); -- 定义接收游标数据中orderno变量
DECLARE m_c INT(11); -- 定义接收游标数据中count变量
DECLARE m_soult CURSOR FOR SELECT `id`, `orderno`, count(*) t FROM hb_shipper_order GROUP BY orderno HAVING t >1; -- 定义游标变量，即接收查询结果集
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE; -- 将结束标志绑定到游标
OPEN m_soult; -- 打开游标
read_loop:LOOP -- 开始循环。这个是mysql 3种循环中的1种。
FETCH m_soult INTO m_id,m_or,m_c; -- 提取游标数据
IF done THEN -- 判断，当为true时
LEAVE read_loop; -- 跳出循环
END IF;
-- 处理事 自己想处理的事
UPDATE `hb_shipper_waybill` SET
ordernos = REPLACE (`ordernos`, m_or, CONCAT(m_or,'-2')),
goodsname = REPLACE (`goodsname`, m_or, CONCAT(m_or,'-2'))
WHERE `id` IN ( SELECT `waybillid` FROM `hb_shipper_order_waybill_relation` WHERE orderid = m_id);
UPDATE `hb_shipper_order` SET orderno = CONCAT(m_or,'-2') WHERE id = m_id;
END LOOP; -- 结束循环
-- 关闭游标
CLOSE m_soult;
END
上图：
DEMO: 2 // 通过 存储过程，处理 copy 数据并处理对应数据关系
delimiter $$
DROP PROCEDURE IF EXISTS gk;
CREATE DEFINER = PROCEDURE `gk`(IN pname varchar(255))
COMMENT '测试'
BEGIN
DECLARE new_id CHAR(32);
DECLARE m_id CHAR(32);
DECLARE new_noids VARCHAR(255);
DECLARE done INT DEFAULT 0;
DECLARE m_result CURSOR FOR select id from `xxx`;
DECLARE m_result2 CURSOR FOR select id from `xxx`;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;
DROP TABLE IF EXISTS `xxx`;
CREATE TABLE `xxx` (
`id` char(32) NOT NULL COMMENT 'ID',
`subsystem` char(32) NOT NULL COMMENT '',
`name` varchar(20) NOT NULL COMMENT '',
`type` varchar(15) NOT NULL COMMENT '',
`url` varchar(200) DEFAULT NULL COMMENT '',
`icon` varchar(20) DEFAULT NULL COMMENT '',
`target` varchar(10) NOT NULL DEFAULT '_self' COMMENT '',
`method` mediumtext COMMENT '',
`orderby` smallint(3) NOT NULL DEFAULT '0' COMMENT '',
`parentid` char(32) NOT NULL DEFAULT '0' COMMENT '',
`relateid` char(32) NOT NULL COMMENT '',
`isopen` tinyint(1) NOT NULL DEFAULT '1' COMMENT '',
`nodeids` varchar(255) DEFAULT NULL COMMENT '',
`nodenum` smallint(3) NOT NULL DEFAULT '0' COMMENT '',
`createtime` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '',
`createuser` char(32) NOT NULL DEFAULT '0' COMMENT '',
`updatetime` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00' COMMENT '',
`udateuser` char(32) NOT NULL DEFAULT '0' COMMENT '',
`deleted` tinyint(1) DEFAULT '0' COMMENT '',
`status` tinyint(1) NOT NULL DEFAULT '0' COMMENT '',
`isdefault` tinyint(1) unsigned NOT NULL DEFAULT '0' COMMENT '',
`isdisable` tinyint(1) unsigned NOT NULL DEFAULT '0' COMMENT '',
`projecttype` varchar(255) NOT NULL COMMENT '',
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 ROW_FORMAT=COMPACT;
INSERT INTO `xxxx` SELECT * FROM `aaa` WHERE `projecttype` = 'T';
UPDATE `xxx` SET `projecttype` = pname;
OPEN m_result;
REPEAT
FETCH m_result INTO m_id;
SET new_id = UPPER(REPLACE(UUID(),'-',''));
UPDATE `xxx` SET `id` = new_id WHERE `id` = m_id;
UPDATE `xxx` SET `parentid` = new_id WHERE `parentid` = m_id;
UNTIL done END REPEAT;
CLOSE m_result;
SET done = 0;
OPEN m_result2;
REPEAT
FETCH m_result2 INTO m_id;
SELECT CONCAT(',', GROUP_CONCAT(`id`)) INTO new_noids FROM `xxx` WHERE `parentid` = m_id;
UPDATE `xxx` SET `nodeids` = new_noids WHERE `id` = m_id;
UNTIL done END REPEAT;
CLOSE m_result2;
INSERT INTO `aaa` SELECT * FROM `xxx`;
DROP TABLE IF EXISTS xxx;
END $$
delimiter ;
