Today when reload database ,it showed errors like :

ERROR 1418 (HY000) at line 33441: 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)

原因：

这是我们开启了bin-log, 我们就必须指定我们的函数是否是
1 DETERMINISTIC 不确定的
2 NO SQL 没有SQl语句，当然也不会修改数据
3 READS SQL DATA 只是读取数据，当然也不会修改数据
4 MODIFIES SQL DATA 要修改数据
5 CONTAINS SQL 包含了SQL语句

其中在function/procedure 里面，只有 DETERMINISTIC, NO SQL 和 READS SQL DATA 被支持。如果我们开启了 bin-log, 我们就必须为我们的function/procedure 指定一个参数。


在MySQL中创建函数时出现这种错误的解决方法：
make param global log_bin_trust_function_creators TRUE;

method 1:

to set global param log_bin_trust_function_creators  

mysql>  show variables like 'log_bin_trust_function_creators';

+---------------------------------+-------+

| Variable_name                   | Value |

+---------------------------------+-------+

| log_bin_trust_function_creators | OFF   |

+---------------------------------+-------+

1 row in set (0.01 sec)

mysql>

mysql>  set global log_bin_trust_function_creators=1;

Query OK, 0 rows affected (0.00 sec)


mysql> show variables like 'log_bin_trust_function_creators';

+---------------------------------+-------+

| Variable_name                   | Value |

+---------------------------------+-------+

| log_bin_trust_function_creators | ON    |

+---------------------------------+-------+

1 row in set (0.00 sec)

mysql>

but after restart mysql serive ,this setting will be unuseful .so can use method 2

method 2:

modify /etc/my.cnf file to add

log_bin_trust_function_creators=1

then restart mysql service