populating table in stored procedure, mysql - mysql

Question

Can anyone shed light on why this will not loop through the function and populate the temp table? Ive tried a number of things and at best can only get the first value to populate. I'm trying to take a value and a ":" separated string (queried in this procedure) to populate a table so I can reference it in a larger query. The function SPLIT_STR works great on its own but I cant seem to increment value "a" so that it separates ALL values per field per value.
BEGIN
DECLARE platform_val VARCHAR(255);
DECLARE productName_val VARCHAR(255);
DECLARE no_more_rows BOOLEAN;
DECLARE num_rows INT DEFAULT 0;
DECLARE loop_cntr INT DEFAULT 0;
DECLARE str VARCHAR(255);
DECLARE a INT DEFAULT 1;
DECLARE cur1 CURSOR FOR SELECT
ProductName,
ProductPlatforms
FROM Feed
limit 10;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET no_more_rows = TRUE;
OPEN cur1;
select FOUND_ROWS() into num_rows;
the_loop: LOOP
FETCH cur1
INTO productName_val,
platform_val;
SET str = platform_val;
WHILE a< num_rows DO
SET str=SPLIT_STR(str,":",a);
insert into temp values (productName_val, str);
SET a=a+1;
END WHILE;
END LOOP the_loop;
END

Answer 1

This is the idea I came up with
CREATE PROCEDURE `col2lines`()
BEGIN
declare v_platform,v_productName,v_platformAll varchar(255) default null;
declare v_finished int default 0;
declare curs cursor for select ProductName,ProductPlatforms from Feed limit 10;
declare continue handler for not found set v_finished = 1;
drop temporary table if exists temp_table;
create temporary table temp_table (
productName varchar(255),
platform varchar(255)
);
open curs;
parent: LOOP
fetch curs into v_productName, v_platformAll;
if (v_finished = 1) then LEAVE parent; end if;
child: LOOP
set v_platform = substring_index(v_platformAll, '::', 1);
set #strlen = char_length(v_platform);
if (#strlen > 0) then
insert into temp_table values (v_productName, v_platform);
set v_platformAll = substr(v_platformAll, #strlen + 3);
iterate child;
end if;
LEAVE child;
END LOOP child;
iterate parent;
END LOOP parent;
close curs;
select * from temp_table;
END