In MySQL, how to create custom message for this error message:
Cannot delete or update a parent row: a foreign key constraint fails (
database.jenis_fasum, CONSTRAINTjenis_fasum_ibfk_1FOREIGN KEY (id_kategori) REFERENCESkategori_fasum(id_kategori))
Using trigger maybe? Can someone provide an example?
Thanks for your help
I don't think it can be done in a TRIGGER, but it can be done with a stored procedure in MySQL 5.5.
Here's the default error message:
mysql> INSERT INTO area SET location_id = 'invalid';
ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint fails (`rates`.`area`, CONSTRAINT `area_ibfk_1` FOREIGN KEY (`location_id`) REFERENCES `location` (`id`))
mysql> SHOW ERRORS;
+-------+------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Level | Code | Message |
+-------+------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Error | 1452 | Cannot add or update a child row: a foreign key constraint fails (`rates`.`area`, CONSTRAINT `area_ibfk_1` FOREIGN KEY (`location_id`) REFERENCES `location` (`id`)) |
+-------+------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)
And here's our stored procedure:
DROP PROCEDURE IF EXISTS test1;
DELIMITER //
CREATE PROCEDURE test1()
DETERMINISTIC
MODIFIES SQL DATA
SQL SECURITY INVOKER
BEGIN
DECLARE EXIT HANDLER FOR SQLSTATE '23000'
BEGIN
SIGNAL SQLSTATE '23000' SET
MYSQL_ERRNO = 1452,
MESSAGE_TEXT = 'Yo! Error 23000!';
END;
INSERT INTO area SET location_id = 'invalid';
END;
//
DELIMITER ;
And here's our custom error message:
mysql> CALL test1();
ERROR 1452 (23000): Yo! Error 23000!
mysql> SHOW ERRORS;
+-------+------+------------------+
| Level | Code | Message |
+-------+------+------------------+
| Error | 1452 | Yo! Error 23000! |
+-------+------+------------------+
1 row in set (0.00 sec)
By the way, why do you want this?
