How to use mysql event scheduler in codeigniter model - mysql

Question

SOLVED
I have this block of codes which will insert data to all unique email_address available on emp_leave_balance table. The problem is it doesn't work even though it didnt catch error. I tried this code in cmd and it works perfectly. I'm not sure if codeigniter accept this kind of query or not.
MODEL
public function insert_credit_points_data($email){
try{
$sql = "DELIMITER $$
CREATE EVENT ecp
ON SCHEDULE EVERY 1 MINUTE STARTS NOW() DO
BEGIN
INSERT INTO emp_leave_balance (balance, date_from, date_to, leave_type, earned, date_filed, action_taken,email_address)
SELECT (1.25+balance), NOW(), DATE_ADD(NOW(),INTERVAL 1 MINUTE), 'Vacation', 1.25, NOW(), 'CREDITED',".$email." FROM emp_leave_balance where email_address = ".$email." ORDER BY balance DESC LIMIT 1;
END$$
DELIMITER ;";
$this->db->query($sql);
}catch(Exception $e){
throw $e;
}
}
SQL ERROR
NEW PROBLEM
I'm trying to loop the insert query based on the number of distinct email address available in my table. The problem is my loop doesn't work.
$sql = "CREATE EVENT ecp ON SCHEDULE EVERY 1 MINUTE STARTS NOW() DO
BEGIN
DECLARE x INT DEFAULT 0;
DECLARE counter INT DEFAULT (SELECT COUNT(DISTINCT(email_address)) FROM emp_leave_balance);
simple_loop: LOOP
INSERT INTO emp_leave_balance (balance, date_from, date_to, leave_type, earned, date_filed, action_taken,email_address)
SELECT (1.25+balance), NOW(), DATE_ADD(NOW(),INTERVAL 1 MINUTE), 'Vacation', 1.25, NOW(), 'CREDITED','".$email."' FROM emp_leave_balance where email_address = '".$email."' ORDER BY balance DESC LIMIT 1;
SET x = x + 1;
IF x<counter THEN
LEAVE simple_loop;
END IF;
END LOOP simple_loop;
END";

Answer 1

Very few (if any) functions in CI throw exceptions, if they do it is usually due to a native php function. In your case query() will return boolean depending on whether or not it succeeded so the try catch block is superfluous.
With that being said, all the query() function does is execute a query so I don't see if having a problem handling anything phpmyadmin can't. I would suggest going into the database.php file and changing db_debug to true. This should help you find the exact cause of the error.