MySQL中实现分割字符串的方法

SQL code

DELIMITER $$

CREATE DEFINER=`root`@`%` FUNCTION `func_get_split_string_total`(
f_string varchar(1000),f_delimiter varchar(5)
) RETURNS int(11)
BEGIN

-- Get the total number of given string.
return 1+(length(f_string) - length(replace(f_string,f_delimiter,'')));
END$$

DELIMITER ;

SQL code

DELIMITER $$

CREATE DEFINER=`root`@`%` FUNCTION `func_get_split_string`(
f_string varchar(1000),f_delimiter varchar(5),f_order int) RETURNS varchar(255) CHARSET utf8
BEGIN

-- Get the separated number of given string.
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 ;

测试的存储过程：
DELIMITER $$

CREATE PROCEDURE `sp_print_result`(
IN f_string varchar(1000),IN f_delimiter varchar(5)
)
BEGIN
-- Get the separated string.
declare cnt int default 0;
declare i int default 0;
set cnt = func_get_split_string_total(f_string,f_delimiter);
drop table if exists tmp_print;
create temporary table tmp_print (num int not null);
while i < cnt
do
set i = i + 1;
insert into tmp_print(num) values (func_get_split_string(f_string,f_delimiter,i));
end while;
select * from tmp_print;

END$$

DELIMITER ;

mysql> call sp_print_result('1,2,44,5,666,29232',',');
+-------+
| num   |
+-------+
|     1 |
|     2 |
|    44 |
|     5 |
|   666 |
| 29232 |
+-------+
6 rows in set (0.01 sec)

Query OK, 0 rows affected (0.01 sec)