Looping through multiple loops in - mysql

Question

DROP PROCEDURE fillBin;
DELIMITER $$
CREATE PROCEDURE fillBin(IN a INT(11), IN b INT(11), IN c INT(11), IN d INT(11), IN e INT(11))
wholeblock:BEGIN
DECLARE i INT UNSIGNED DEFAULT 1;
DECLARE j INT UNSIGNED DEFAULT 1;
DECLARE k INT UNSIGNED DEFAULT 1;
DECLARE l INT UNSIGNED DEFAULT 1;
DECLARE m INT UNSIGNED DEFAULT 1;
DECLARE strA VARCHAR(255) DEFAULT '';
DECLARE strB VARCHAR(255) DEFAULT '';
DECLARE strC VARCHAR(255) DEFAULT '';
DECLARE strD VARCHAR(255) DEFAULT '';
DECLARE strE VARCHAR(255) DEFAULT '';
DECLARE strF VARCHAR(255) DEFAULT '';
SET strA = 'A';
SET strB = 'G';
SET strC = 'R';
SET strD = 'S';
SET strE = 'B';
SET strF= '';
WHILE i < (a+1) DO
SET strA=CONCAT(strA,i) ;
WHILE j < (b+1) DO
SET strB = CONCAT(strB,j);
WHILE k < (c+1) DO
SET strC =CONCAT(strC,k);
WHILE l < (d+1) DO
SET strD = CONCAT(strD,l);
WHILE m < (e+1) DO
SET strE = CONCAT(strE,m);
SET strF = CONCAT(strA, strB, strC, strD, strE);
INSERT INTO BIN (`aisle`, `room`, `rack`, `shelf`, `bin`, `barcode`, `warehouse_id`)
VALUES(strA,strB, strC, strD, strE, strF, 1);
SET m=m+1;
SET strE = 'B';
END WHILE;
SET l=l+1;
SET strD = 'S';
END WHILE;
SET k=k+1;
SET strC = 'R';
END WHILE;
SET j=j+1;
SET strB = 'G';
END WHILE;
SET i=i+1;
SET strA = 'A';
END WHILE;
END $$
//calling the procedure
CALL fillBin(1, 1, 1, 2, 2);
My procedure inserts the values: A1G1R1S1B1 and A1G1R1S1B2. And the inner loop breaks.
but the correct insertion should be: A1G1R1S1B1 and A1G1R1S1B2 and A1G1R1S2B1 and A1G1R1S2B2.
The insert is obviously incomplete. How should I place my insert statement or change the looping as to cater the needs?
Please help. Thanks

Answer 1

Why don't use simple SQL to do this task ?
Look at the following example
We need a table with a seqence of numbers from 1 to X - where X is a maximum number whenever we need.
CREATE TABLE numbers(
x int primary key auto_increment
);
INSERT INTO numbers
SELECT null FROM information_schema.columns;
SELECT max( x ) FROM numbers;
| MAX( X ) |
|----------|
| 558 |
And now the below simple select will generate all required records for us
(see this demo: http://sqlfiddle.com/#!2/1e5c4b/7
- you will need to scroll to the bottom of the page to see a result of the query):
SET #strA = 'A';
SET #strB = 'G';
SET #strC = 'R';
SET #strD = 'S';
SET #strE = 'B';
SET #strF= '';
SET #a = 2;
SET #b = 2;
SET #c = 2;
SET #d = 2;
SET #e = 2;
SELECT *,
CONCAT(strA, strB, strC, strD, strE) strF,
1 As warehouse_id
FROM (
SELECT Concat(#strA,x) strA
FROM numbers
WHERE x <= #a
) A
CROSS JOIN
(
SELECT Concat(#strB,x) strB
FROM numbers
WHERE x <= #b
) B
CROSS JOIN
(
SELECT Concat(#strC,x) strC
FROM numbers
WHERE x <= #c
) C
CROSS JOIN
(
SELECT Concat(#strD,x) strD
FROM numbers
WHERE x <= #d
) D
CROSS JOIN
(
SELECT Concat(#strE,x) strE
FROM numbers
WHERE x <= #e
) E
And now just place an INSERT statement at the top of the above query:
INSERT INTO BIN (`aisle`, `room`, `rack`, `shelf`, `bin`, `barcode`, `warehouse_id`)
SELECT *,
CONCAT(strA, strB, strC, strD, strE) strF,
1 As warehouse_id
FROM (
SELECT Concat(#strA,x) strA
FROM numbers
WHERE x <= #a
) A
CROSS JOIN
(
SELECT Co .....
........
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