Case not working for my stored procedure - mysql

Question

I have created this procedure to insert upc_id and relevent values in the table product_universal_description.
CREATE PROCEDURE veealpha
(
IN s_po_id INT(11),
IN s_supplier_id INT(11),
IN s_location_id VARCHAR(32),
IN s_warehouse_id INT(11),
IN s_user_id INT(11),
OUT message VARCHAR(64),
OUT error_code INT(4)
)
BEGIN
DECLARE temp_upc VARCHAR(32);
DECLARE i INT;
DECLARE finished INTEGER DEFAULT 0;
DECLARE loop_count int(4);
DECLARE upc varchar(32);
DECLARE p_product_id int(11);
DECLARE p_model varchar(64);
DECLARE counter_cursor CURSOR FOR
SELECT product_id,model,quantity FROM product
WHERE model in('CFB0040','CFB0042','CFB0043','CFB0044')
AND quantity > 0;
DECLARE CONTINUE HANDLER FOR 1062
SET message = 'Duplicate Keys Found';
DECLARE CONTINUE HANDLER FOR NOT FOUND
SET finished = 1;
OPEN counter_cursor;
add_data : LOOP
FETCH counter_cursor INTO p_product_id, p_model, loop_count;
SET i = 1;
WHILE loop_count > 0 DO
CASE i
WHEN i < 10 THEN
SET temp_upc = CONCAT(s_po_id,'-','CFC','-','30','-','APR14','-',p_model,'-000',i);
WHEN (i >= 10 AND i < 100) THEN
SET temp_upc = CONCAT(s_po_id,'-','CFC','-','30','-','APR14','-',p_model,'-00',i);
WHEN (i >= 100 AND i < 1000) THEN
SET temp_upc = CONCAT(s_po_id,'-','CFC','-','30','-','APR14','-',p_model,'-0',i);
ELSE
SET temp_upc = CONCAT(s_po_id,'-','CFC','-','30','-','APR14','-',p_model,'-',i);
END CASE;
INSERT INTO product_universal_description
(
`upc_id`,
`po_id`,
`supplier_id`,
`location_id`,
`warehouse_id`,
`product_id`,
`model_no`,
`added_by`,
`updated_by`,
`date_added`,
`date_modified`
) VALUES (
temp_upc,
s_po_id,
s_supplier_id,
s_location_id,
s_warehouse_id,
p_product_id,
p_model,
s_user_id,
s_user_id,
NOW(),
NOW()
);
SET i=i+1;
SET loop_count = loop_count - 1;
END WHILE;
IF finished = 1 THEN
LEAVE add_data;
END IF;
END LOOP add_data;
CLOSE counter_cursor;
END
CALL veealpha(123,45,'UP',1,56,#msg,#err);
ON Execution I getting the result like this.
How ever I have given the conditions there for UPC_ID that it should be well mannered as per case. But leaving for i = 1 FOR all it takes the ELSE condition at CASE. Can anybody tell me .. what's wrong happened and how could i get the desired result.

Answer 1

Try:
...
-- CASE i
CASE
WHEN i < 10 THEN
SET temp_upc = CONCAT(s_po_id,'-','CFC','-','30','-','APR14','-',p_model,'-000',i);
WHEN (i >= 10 AND i < 100) THEN
SET temp_upc = CONCAT(s_po_id,'-','CFC','-','30','-','APR14','-',p_model,'-00',i);
WHEN (i >= 100 AND i < 1000) THEN
SET temp_upc = CONCAT(s_po_id,'-','CFC','-','30','-','APR14','-',p_model,'-0',i);
ELSE
SET temp_upc = CONCAT(s_po_id,'-','CFC','-','30','-','APR14','-',p_model,'-',i);
END CASE;
...