set global log_bin_trust_function_creators = 1; DROP FUNCTION IF EXISTS rand_string; DELIMITER $$ CREATE FUNCTION rand_string(n INT) RETURNS VARCHAR(255) BEGIN     DECLARE chars_str varchar(100) DEFAULT 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';     DECLARE return_str varchar(255) DEFAULT '';     DECLARE i INT DEFAULT 0;     WHILE i < n DO         SET return_str = concat(return_str,substring(chars_str , FLOOR(1 + RAND()*62 ),1));         SET i = i +1;     END WHILE;     RETURN return_str; END $$ DELIMITER ;

SHOW FUNCTION STATUS WHERE Db='database_name';