Error 'This function has none of DETERMINISTIC, NO SQL, or READS SQL DATA in its declaration and bin

mysql 创建函数是报错！

    Last_IO_Error:
               Last_SQL_Errno: 1418
               Last_SQL_Error: Error '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)' on query. Default database: 'kf'. Query: '    Last_IO_Error: