mysql日志文件的使用、数据恢复(三)
t 778
#090427 15:29:35 server id 1 end_log_pos 805 Xid = 14
COMMIT/*!*/;
# at 805
#090427 15:30:21 server id 1 end_log_pos 875 Query thread_id=1 exec_time=0 error_code=0
SET TIMESTAMP=1240817421/*!*/;
BEGIN
/*!*/;
# at 875
#090427 15:30:21 server id 1 end_log_pos 981 Query thread_id=1 exec_time=0 error_code=0
SET TIMESTAMP=1240817421/*!*/;
delete from test where id between 4 and 5
/*!*/;
# at 981
#090427 15:30:21 server id 1 end_log_pos 1008 Xid = 15
COMMIT/*!*/;
# at 1008
#090427 15:30:34 server id 1 end_log_pos 1078 Query thread_id=1 exec_time=0 error_code=0
SET TIMESTAMP=1240817434/*!*/;
BEGIN
/*!*/;
# at 1078
#090427 15:30:34 server id 1 end_log_pos 1106 Intvar
SET INSERT_ID=7/*!*/;
# at 1106
#090427 15:30:34 server id 1 end_log_pos 1214 Query thread_id=1 exec_time=0 error_code=0
SET TIMESTAMP=1240817434/*!*/;
insert into test(val,data) values(70,'ddd')
/*!*/;
# at 1214
#090427 15:30:34 server id 1 end_log_pos 1241 Xid = 16
COMMIT/*!*/;
# at 1241
#090427 15:30:41 server id 1 end_log_pos 1282 Rotate to mysql-bin.000003 pos: 4
DELIMITER ;
# End of log file
ROLLBACK /* added by mysqlbinlog */;
/*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/;
*/
在这个文件中，我们可以看到DELETE的操作的起始位置是875，终止位置是1008,那么我们只要重做第二个日志文件的开头到的操作，然后再从到末尾的操作，我们就可以把数据给恢复回来，而不会DELETE数据。所以执行两个命令：
Sql代码
mysql>mysqlbinlog /var/log/mysql/mysql-bin.000002 --stop-pos=875 | mysql -uroot –p
mysql>mysqlbinlog /var/log/mysql/mysql-bin.000002 --start-pos=1008 | mysql -uroot -p
OK,现在第二个日志文件的数据了。
第三个日志文件也是同理，只要找到DROP TABLE的位置，就可以了。
Sql代码
mysql>mysqlbinlog /var/log/mysql/mysql-bin.000003 --stop-pos=574 | mysql -uroot –p
现在我们再查一下数据看看:
mysql> select * from test;
+----+------+-------+
| id | val | data |
+----+------+-------+
| 1 | 10 | liang |
| 2 | 20 | jia |
| 3 | 30 | hui |
| 4 | 40 | aaa |
| 5 | 50 | bbb |
| 6 | 60 | ccc |
| 7 | 70 | ddd |
| 8 | 80 | dddd |
| 9 | 90 | eeee |
+----+------+-------+
9 rows in set (0.00 sec)
可以看到，全部数据都回来了。