MySQL Split Comma Separated String Into Temp Table

I found good solution for this

https://forums.mysql.com/read.php?10,635524,635529

Thanks to Peter Brawley

Trick: massage a Group_Concat() result on the csv string into an Insert...Values... string:

drop table if exists t;
create table t( txt text );
insert into t values('1,2,3,4,5,6,7,8,9');

drop temporary table if exists temp;
create temporary table temp( val char(255) );
set @sql = concat("insert into temp (val) values ('", replace(( select group_concat(distinct txt) as data from t), ",", "'),('"),"');");
prepare stmt1 from @sql;
execute stmt1;
select distinct(val) from temp;
+------+
| val  |
+------+
| 1    |
| 2    |
| 3    |
| 4    |
| 5    |
| 6    |
| 7    |
| 8    |
| 9    |
+------+

Also if you just want to join some table to list of id you can use LIKE operator. There is my solution where I get list of id from blog post urls, convert them to comma separated list started and finished with commas and then join related products by id list with LIKE operator.

SELECT b2.id blog_id, b2.id_list, p.id
FROM (
    SELECT b.id,b.text,
    CONCAT(
        ",",
            REPLACE(
                EXTRACTVALUE(b.text,'//a/@id')
                , " ", ","
            )
        ,","
    ) AS id_list
    FROM blog b
) b2
LEFT JOIN production p ON b2.id_list LIKE CONCAT('%,',p.id,',%')
HAVING b2.id_list != ''

Just because I really love resurrecting old questions:

CREATE PROCEDURE `SPLIT_LIST_STR`(IN `INISTR` TEXT CHARSET utf8mb4, IN `ENDSTR` TEXT CHARSET utf8mb4, IN `INPUTSTR` TEXT CHARSET utf8mb4, IN `SEPARATR` TEXT CHARSET utf8mb4)
BEGIN
    SET @I = 1;
    SET @SEP = SEPARATR;
    SET @INI = INISTR;
    SET @END = ENDSTR;
    SET @VARSTR = REPLACE(REPLACE(INPUTSTR, @INI, ''), @END, '');
    SET @N = FORMAT((LENGTH(@VARSTR)-LENGTH(REPLACE(@VARSTR, @SEP, '')))/LENGTH(@SEP), 0)+1;

    CREATE TEMPORARY TABLE IF NOT EXISTS temp_table(P1 TEXT NULL);

    label1: LOOP
        SET @TEMP = SUBSTRING_INDEX(@VARSTR, @SEP, 1);
        insert into temp_table (`P1`) SELECT @TEMP;
        SET @I = @I + 1;
        SET @VARSTR = REPLACE(@VARSTR, CONCAT(@TEMP, @SEP), '');
        IF @N >= @I THEN
          ITERATE label1;
        END IF;
        LEAVE label1;
      END LOOP label1;
    SELECT * FROM temp_table;
    END

Which Produces:

P1
1
2
3
4

When Using CALL SPLIT_LIST_STR('("', '")', '("1", "2", "3", "4")', '", "');

I might pop up later to tide up the code a bit more! Cheers!