Q:

mysql error when adding function

The following error is returned when trying to use a MySQL function..
#1418 - This function has none of DETERMINISTIC, NO SQL, or READS SQL DATA in its
declaration and binary logging is enabled (you *might* want to use the less safe 
log_bin_trust_function_creators variable) 

I couple of days ago I started using replication..? Don't know if this could have an incluence on it?! But I know one thing - it has worked :)
If I try to override (add the function again) the same error occurs..
The function
DELIMITER $$

DROP FUNCTION IF EXISTS `stock_in_stock_ids` $$
CREATE DEFINER=`dynaccount`@`localhost` FUNCTION `stock_in_stock_ids`(_running_total_limit INT, _product_id INT, _group_id INT) RETURNS TEXT
BEGIN
    DECLARE done INT DEFAULT FALSE;
    DECLARE _running_count INT default 0;
    DECLARE _id INT;
    DECLARE _count INT;
    DECLARE _ids TEXT DEFAULT NULL;

    DECLARE _cur CURSOR FOR SELECT id, count FROM stock WHERE group_id=_group_id && type=2 && product_id=_product_id ORDER BY time DESC, id DESC;
    DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;

    OPEN _cur;

    read_loop: LOOP
        FETCH _cur INTO _id, _count;

        IF done THEN
            SET _ids = '0';
            LEAVE read_loop;
        END IF;

        SET _running_count = _running_count + _count;
        SET _ids = CONCAT_WS(',', _ids, _id);

        IF _running_count >= _running_total_limit THEN
            LEAVE read_loop;
        END IF;
    END LOOP read_loop;

    CLOSE _cur;

    RETURN _ids;
END $$

DELIMITER ;

A:

here you have a post that saves me in the past about this error:
http://forum.9kgames.com/default.aspx?g=posts&m=17
in my case I only had to specify the DETERMINISTIC in the create function:
CREATE DEFINER=`dynaccount`@`localhost` FUNCTION `stock_in_stock_ids`(_running_total_limit INT, _product_id INT, _group_id INT) 
RETURNS TEXT
DETERMINISTIC
READS SQL DATA

hope it helps
UPDATE: link is not working anymore so here is a copy from archive.org: https://web.archive.org/web/20120310020353/http://forum.9kgames.com/default.aspx?g=posts&m=17
This warning is rising when 
a). You want to create a stored function and 
b). As the default MySQL server supports replication, i.e, BINARY LOGGING is turned ON. 
To resolve this issue, there’re some tips here:
1). For stored function itself. When you create a stored function, you must declare either that it is deterministic or that it does not modify data. Otherwise, it may be unsafe for data recovery or replication. 
By default, for a CREATE FUNCTION statement to be accepted, at least one of DETERMINISTIC, NO SQL, or READS SQL DATA must be specified explicitly. Otherwise an error occurs: 
Code:
ERROR 1418 (HY000): This function has none of DETERMINISTIC, NO SQL,
or READS SQL DATA in its declaration and binary logging is enabled
(you *might* want to use the less safe log_bin_trust_function_creators
variable).

This function is deterministic (and does not modify data), so it is safe: 
Code:
CREATE FUNCTION f1(i INT)
RETURNS INT
DETERMINISTIC
READS SQL DATA
BEGIN
  RETURN i;
END;

This function uses UUID() which is not deterministic, so the function also is not deterministic and is not safe: 
Code:
CREATE FUNCTION f2()
RETURNS CHAR(36) CHARACTER SET utf8
BEGIN
  RETURN UUID();
END;

This function modifies data, so it may not be safe: 
Code:
CREATE FUNCTION f3(p_id INT)
RETURNS INT
BEGIN
  UPDATE t SET modtime = NOW() WHERE id = p_id;
  RETURN ROW_COUNT();
END;

MySQL does not check that a function declared DETERMINISTIC is free of statements that produce nondeterministic results. 
Although it is possible to create a deterministic stored function without specifying DETERMINISTIC, you cannot as of MySQL 5.1.15 execute this function using statement-based binary logging. To execute such a function, you must use row-based or mixed binary logging. Alternatively, if you explicitly specify DETERMINISTIC in the function definition, you can use any kind of logging, including statement-based logging. 
2) Although you’ve finished the step 1, in most cases, you may still need SUPER privilege to set the global variable log_bin_trust_function_creators as true and then run to create stored function.
To relax the preceding conditions on function creation (that you must have the SUPER privilege and that a function must be declared deterministic or to not modify data), set the global log_bin_trust_function_creators system variable to 1. By default, this variable has a value of 0, but you can change it like this: 
mysql> SET GLOBAL log_bin_trust_function_creators = 1;

You can also set this variable by using the log_bin_trust_function_creators option when starting the server. 
If binary logging is not enabled, log_bin_trust_function_creators does not apply. SUPER is not required for function creation unless, as described previously, the DEFINER value in the function definition requires it. 
Note: If your applications run on a multi-tenant hosting server and the hosting company wouldn’t like to do this, you may need to modify your stored procedures instead of using stored functions.

A:

You should write the following lines between the "RETURNS TEXT" and "BEGIN". It will work.. :)
LANGUAGE SQL
DETERMINISTIC
CONTAINS SQL
SQL SECURITY DEFINER

