MySQL管理之道-笔记-MySQL5.7 sql_mode的改变

MySQL 5.7 sql_mode的改变
1、默认启用STRICT_TRANS_TABLES严格模式，该模式为严格模式，对数据会作严格的校验，错误数据不能插入报错，并且事物回滚。
2、MySQL5.6默认SQL_MODE模式为空。

表age字段是int，插入字符类时会报错，但sql_mode为空，所以数据可以插入。

图1

root@localhost:mysql3306.sock [sbtest]>desc t1;+-------+-------------+------+-----+---------+-------+| Field | Type | Null | Key | Default | Extra |+-------+-------------+------+-----+---------+-------+| id | int(11) | NO | PRI | NULL | || name | varchar(2) | YES | | NULL | || age | smallint(6) | YES | | NULL | |+-------+-------------+------+-----+---------+-------+

图2 （sql_mode设置为空）

root@localhost:mysql3306.sock [sbtest]>set sql_mode='';Query OK, 0 rows affected, 1 warning (0.02 sec)root@localhost:mysql3306.sock [sbtest]>insert into t1 values(1,'aa','aaa');Query OK, 1 row affected, 1 warning (0.04 sec)root@localhost:mysql3306.sock [sbtest]>show warnings;+---------+------+----------------------------------------------------------+| Level | Code | Message |+---------+------+----------------------------------------------------------+| Warning | 1366 | Incorrect integer value: 'aaa' for column 'age' at row 1 |+---------+------+----------------------------------------------------------+row in set (0.00 sec)

图3 （插入成功）

root@localhost:mysql3306.sock [sbtest]>select * from t1;+----+------+------+| id | name | age |+----+------+------+| 1 | aa | 0 |+----+------+------+row in set (0.00 sec)

图4（改成STRICT_TRANS_TABLES，插入失败，事务回滚）

root@localhost:mysql3306.sock [sbtest]>set sql_mode='STRICT_TRANS_TABLES';Query OK, 0 rows affected, 1 warning (0.00 sec)root@localhost:mysql3306.sock [sbtest]>insert into t1 values(2,'bb','bbb');ERROR 1366 (HY000): Incorrect integer value: 'bbb' for column 'age' at row 1root@localhost:mysql3306.sock [sbtest]>select * from t1 where id=2;Empty set (0.04 sec)