ENGINE=MyISAM 不支持事务无法回滚

mysql> show create table t6;
+-------+----------------------------------------------------------------------------------------+
| Table | Create Table                                                                           |
+-------+----------------------------------------------------------------------------------------+
| t6    | CREATE TABLE `t6` (
`id` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1 |
+-------+----------------------------------------------------------------------------------------+
1 row in set (0.03 sec)

mysql> update t6 set id=2 where id=1;
Query OK, 1 row affected (0.00 sec)
Rows matched: 1  Changed: 1  Warnings: 0

mysql> select * from t6;
+------+
| id   |
+------+
|    2 |
+------+
1 row in set (0.00 sec)

mysql> rollback;
Query OK, 0 rows affected (0.00 sec)

mysql> select * from t6;
+------+
| id   |
+------+
|    1 |
+------+
1 row in set (0.00 sec)

---------------------------------------------------------------------------------------------------

mysql> create table t5(id int)  ENGINE=MyISAM ;
Query OK, 0 rows affected (0.13 sec)

mysql> desc t5
-> ;
+-------+---------+------+-----+---------+-------+
| Field | Type    | Null | Key | Default | Extra |
+-------+---------+------+-----+---------+-------+
| id    | int(11) | YES  |     | NULL    |       |
+-------+---------+------+-----+---------+-------+
1 row in set (0.03 sec)

mysql> show create table t5;
+-------+----------------------------------------------------------------------------------------+
| Table | Create Table                                                                           |
+-------+----------------------------------------------------------------------------------------+
| t5    | CREATE TABLE `t5` (
`id` int(11) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1 |
+-------+----------------------------------------------------------------------------------------+
1 row in set (0.00 sec)

mysql> insert into t5 values(1);
Query OK, 1 row affected (0.02 sec)

mysql> commit;
Query OK, 0 rows affected (0.00 sec)

mysql> select * from t5;
+------+
| id   |
+------+
|    1 |
+------+
1 row in set (0.02 sec)

mysql> update t5 set id=2 where id=1;
Query OK, 1 row affected (0.05 sec)
Rows matched: 1  Changed: 1  Warnings: 0

mysql> rollback;
Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> select * from t5;
+------+
| id   |
+------+
|    2 |
+------+
1 row in set (0.00 sec)

ENGINE=MyISAM  不支持事务无法回滚