Need help with Stored Procedure coding after migration from SQL Server

[tcee sutton]

I am migrating my stored procedure from SQL SERVER to MYSQL and although my code doesn't cause any errors when I execute, I feel something is wrong with the code as it is not working as it should.

Can someone take a look at this code and see if there are any coding issues? Thank you in advance for your help.

MYSQL SERVER STORED PROCEDURE:
USE `a7itm`;

DELIMITER $$
SET SQL_MODE = ANSI_QUOTES$$
/****** Object: StoredProcedure [a7user].[toggleConstraintsState] Script Date: 02/07/2013 19:23:08 ******/
DROP PROCEDURE IF EXISTS a7user_toggleConstraintsState;
CREATE PROCEDURE `a7user_toggleConstraintsState`(
`toggleState` bit,
`sql`VARCHAR(1000),
`constraintName` varchar(100),
`tableName` varchar(100)
)
BEGIN
DECLARE referentialConstraints Cursor FOR SELECT tc.constraint_name,tc.table_name from INFORMATION_SCHEMA.TABLE_CONSTRAINTS tc;
SET `sql` = 'ALTER TABLE ' + `tableName` + ' NOCHECK CONSTRAINT ' + `constraintName`;
SET `sql` = 'ALTER TABLE ' + `tableName` + ' WITH CHECK CHECK CONSTRAINT ' + `constraintName`;
Open referentialConstraints;

constraint_loop:While (FETCH_STATUS =0) DO
Fetch referentialConstraints INTO `constraintName`, `tableName`;
IF (toggleState = 0) THEN
LEAVE constraint_loop;

END IF;
END WHILE;

CLOSE referentialConstraints;

END$$
DELIMITER ;