Mysql Function - not sure where to start - mysql

Question

I would like to write a function in Mysql that from a given product code return a formatted string
Here is an example of the calls I need to manually make now to get the result I want.
SELECT p.productcategoryid from products p where (isnull(p.endeffdt) or (p.endeffdt = '0000-00-00') or (p.endeffdt > now())) and p.code='T29R66N1';
T29R66NQ is the product code I need the full path for - the above call returns '38' as the category ID.
I then perform the following select based on the result from above
SELECT name,parentid,productcategorypath FROM productcategory WHERE recid = '38';
This returns
name->Built-In Hobs
parentid->7
productcategorypath=222,7,38
Using that result I then
SELECT name,parentid,productcategorypath FROM productcategory WHERE recid = '7';
giving me
name->Built-In
parentid->222
productcategorypath=222,7
and again, I then do
SELECT name,parentid,productcategorypath FROM productcategory WHERE recid = '222';
which in turn gives me
name->Kitchen & Home Appliances
parentid->0
productcategorypath=222
I stop there because parentid = 0 (it may go on for more iterations but will always end with parent id of 0) but i need the results from the last 3 selects to give me the following string
Kitchen & Home Appliances > Built-In > Built-In Hobs
I would like a mysql function whereby I can use it like
select getpath(code) from products where code='T29R66N1'
Any help would be appreciated.
EDIT:
I managed to figure it myself - here is my function
DROP FUNCTION IF EXISTS mydb.getpath;
CREATE FUNCTION mydb.getpath (itemid VARCHAR(20))
RETURNS varchar(255)
BEGIN
DECLARE path_name varchar(255);
DECLARE tmp_name varchar(255);
DECLARE tmp_parentid INT;
DECLARE tmp_parentid1 INT;
SELECT p.productcategoryid INTO tmp_parentid from products p where (isnull(p.endeffdt) or (p.endeffdt = '0000-00-00') or (p.endeffdt > now())) and p.code=itemid;
myloop:LOOP
SELECT name,parentid INTO tmp_name,tmp_parentid1 FROM productcategory WHERE recid = tmp_parentid;
SET path_name = concat_ws(' > ', tmp_name,path_name);
IF tmp_parentid1!=0 THEN
SET tmp_parentid = tmp_parentid1;
ITERATE myloop;
ELSE
LEAVE myloop;
END IF;
END LOOP;
RETURN path_name;
END;

Answer 1

DROP FUNCTION IF EXISTS mydb.getpath;
CREATE FUNCTION mydb.getpath (itemid VARCHAR(20))
RETURNS varchar(255)
BEGIN
DECLARE path_name varchar(255);
DECLARE tmp_name varchar(255);
DECLARE tmp_parentid INT;
DECLARE tmp_parentid1 INT;
SELECT p.productcategoryid INTO tmp_parentid from products p where (isnull(p.endeffdt) or (p.endeffdt = '0000-00-00') or (p.endeffdt > now())) and p.code=itemid;
myloop:LOOP
SELECT name,parentid INTO tmp_name,tmp_parentid1 FROM productcategory WHERE recid = tmp_parentid;
SET path_name = concat_ws(' > ', tmp_name,path_name);
IF tmp_parentid1!=0 THEN
SET tmp_parentid = tmp_parentid1;
ITERATE myloop;
ELSE
LEAVE myloop;
END IF;
END LOOP;
RETURN path_name;
END;