Mysql数据迁移——按分号split一列字段插入另一张表

环境描述：

Mysql5.0.22

navicat10

问题描述：

shopgoods里面的字段image保存着多张相关商品的图片URL地址，如：

/resources/../upload-photo/commodity/20130428/75331367132321640.jpg;/resources/../upload-photo/commodity/20130428/92551367132322015.jpg;/resources/../upload-photo/commodity/20130428/17351367132322046.jpg;/resources/../upload-photo/commodity/20130428/5651367132322203.jpg;/resources/../upload-photo/commodity/20130428/92591367132322234.jpg;

现要将这一字段外键关联到另一张表，将字段分隔（split）为单个路径，并绑定shopgoods的主键id，用存储过程完成拆分及插入操作。

代码实现

# 函数：func_split_TotalLength 
DELIMITER $$ 
DROP function IF EXISTS `func_split_TotalLength` $$ 
CREATE  FUNCTION `func_split_TotalLength` 
(f_string varchar(1000),f_delimiter varchar(5)) RETURNS int(11) 
BEGIN 
    # 计算传入字符串的总length 
    return 1+(length(f_string) - length(replace(f_string,f_delimiter,''))); 
END$$ 
DELIMITER; 

# 函数：func_split 
DELIMITER $$ 
DROP function IF EXISTS `func_split` $$ 
CREATE FUNCTION `func_split` 
(f_string varchar(1000),f_delimiter varchar(5),f_order int) RETURNS varchar(255) CHARSET utf8 
BEGIN 
    # 拆分传入的字符串，返回拆分后的新字符串 
        declare result varchar(255) default ''; 
        set result = reverse(substring_index(reverse(substring_index(f_string,f_delimiter,f_order)),f_delimiter,1)); 
        return result; 
END$$ 
DELIMITER; 

# 存储过程：splitString 
DELIMITER $$ 
DROP PROCEDURE IF EXISTS `splitString` $$ 
CREATE PROCEDURE `splitString` 
(IN f_string varchar(1000),IN idstr int, IN f_delimiter varchar(5)) 
BEGIN 
# 拆分结果 
declare cnt int default 0; 
declare i int default 0; 
set cnt = func_split_TotalLength(f_string,f_delimiter); 
DROP TABLE IF EXISTS `tmp_split`; 
create temporary table `tmp_split` (`status` varchar(128) not null,`ids` int ) DEFAULT CHARSET=utf8; 
while i < cnt 
do 
    set i = i + 1; 
    insert into tmp_split(`status`,`ids`) values (func_split(f_string,f_delimiter,i),idstr); 
end while; 
END$$ 
DELIMITER; 

# 插入分隔数据
DELIMITER $$ 
DROP PROCEDURE IF EXISTS `valinsert` $$ 
CREATE PROCEDURE `valinsert` () 
BEGIN
    declare imageid int default 0; 
  declare tmpName varchar(100) default '' ;
    declare tmpImage varchar(500) default '' ;
-- 定义游标
    declare cur1  CURSOR FOR SELECT image FROM shop_goods ;
    DECLARE cur2     CURSOR FOR SELECT goodsid FROM shop_goods;
    declare CONTINUE HANDLER FOR SQLSTATE '02000' SET tmpName = null;
-- 开游标 
    OPEN cur1 ;
    OPEN cur2;
    FETCH cur1 INTO tmpImage;
    FETCH cur2 INTO imageid;
    -- 清空带插入的表
    TRUNCATE  shop_goods_image;
    WHILE ( tmpName is not null) DO
        -- 调取分隔字段的存储过程splitString
        call splitString(tmpImage,imageid,";");
        INSERT INTO shop_goods_image (location,shop_goods_id) SELECT status,ids from tmp_split; 
        FETCH cur1 INTO tmpImage;
        FETCH cur2 INTO imageid;
    END WHILE;
    CLOSE cur1;
    CLOSE cur2;
select * from shop_goods_image; 
END$$ 
DELIMITER; 

call valinsert();

图示效果：

执行代码后的结果如图：