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 ;