一.在创建存储函数时，出现错误：
ERROR 1418 (HY000): This function has none of DETERMINISTIC, NO SQL, or READS SQLDATA in its declaration binary logging is enabled (you *might* want to use the less safe log_bin_trust_function_creators variable)
解决方法： 1.mysql> SET GLOBAL log_bin_trust_function_creators = 1;
2.在登录MySQL服务器是，加上 “--log-bin-trust-function-creators=1 ”参数并设置为1。
3.一劳永逸的方法，在my.ini（my.cnf）中的[mysqld]区段中加上 log-bin-trust-function-creators=1。
mysql> show variables like '%func%';
+---------------------------------+-------+
| Variable_name | Value |
+---------------------------------+-------+
| log_bin_trust_function_creators | OFF? |
+---------------------------------+-------+
1 row in set (0.00 sec)
mysql> set global log_bin_trust_function_creators=1;
Query OK, 0 rows affected (0.00 sec)
mysql> show variables like '%func%';
+---------------------------------+-------+
| Variable_name | Value |
+---------------------------------+-------+
| log_bin_trust_function_creators | ON? |
+---------------------------------+-------+
1 row in set (0.00 sec)
二.在声明变量时：mysql> declare my_sql int default 10;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'declare my_sql int default 10' at line 1
解决方法：变量的声明（DECLARE）必须发生在BEGIN-END语句块里，而且必须发生在同一个BEGIN-END语句块里的其他命令之前。下面是变量声明（DECLARE）的语法：
DECLARE varname1, varname2, varname3,… Datatype [DEFAULT value];
注意：必须为所有的局部变量声明它们的数据类型。如果没有使用关键字 DEFAULT 进行设定（即初始化），局部变量的初始值都将是NULL。