在my.cnf中设置了sql_mode='STRICT_TRANS_TABLES';

却发现还是有非法数据的写入，比如无符号整数字段本来值是0，还可以减，结果当然溢出了，经检查发现存储过程中默认的sql_mode并没有使用global的sql_mode，测试如下：

CREATE PROCEDURE p_test()
BEGIN
select @@session.sql_mode,@@global.sql_mode;
END;

call p_test();

+--------------------+---------------------+
| @@session.sql_mode | @@global.sql_mode|
+--------------------+---------------------+
|| STRICT_TRANS_TABLES |
+--------------------+---------------------+
1 row in set (0.00 sec)

CREATE PROCEDURE p_test1()
BEGIN
set sql_mode=@@global.sql_mode;

select @@session.sql_mode,@@global.sql_mode;
END;

call p_test1();

+---------------------+---------------------+
| @@session.sql_mode | @@global.sql_mode|
+---------------------+---------------------+
| STRICT_TRANS_TABLES | STRICT_TRANS_TABLES |
+---------------------+---------------------+
1 row in set (0.00 sec)