you *might* want to use the less safe log_bin_trust_function_creators variable

在还原MySQL function时，发现导入不进去，提示you *might* want to use the less safe log_bin_trust_function_creators variable；

发现是MySQL的配置问题，需要配置binlog中信任创建方法；

即时生效的设置方法：

mysql> SET GLOBAL log_bin_trust_function_creators = 1;
mysql> SET GLOBAL log_bin_trust_function_creators = 1;

配置文件my.cnf设置方法:

mysqld中设置log_bin_trust_function_creators = 1

参考：https://dev.mysql.com/doc/refman/5.7/en/stored-programs-logging.html