MySQL通过Binlog恢复删除的表

查看log-bin是否开启：

mysql> show variables like '%log%bin%';

+---------------------------------+-------+

| Variable_name    
     
     
  | Value |

+---------------------------------+-------+

| log_bin      
     
     
      | ON
   |

| log_bin_trust_function_creators | OFF  
|

| sql_log_bin    
     
     
    | ON  
 |

+---------------------------------+-------+

3 rows in set (0.00 sec)

用sakila数据库测试：

mysql> use sakila;

Database changed

查看表内容：

mysql> select * from yoon;

+----+------+

| id | name |

+----+------+

|  1 | yoon |

|  7 | aaa  |

+----+------+

2 rows in set (0.00 sec)

查看日志信息：

mysql> show master status;

+------------------+----------+--------------+------------------+

| File      
      | Position
| Binlog_Do_DB | Binlog_Ignore_DB |

+------------------+----------+--------------+------------------+

| mysql-bin.000025 |    
 932 |    
     
   |  
     
     
   |

+------------------+----------+--------------+------------------+

1 row in set (0.00 sec)

mysql> drop table yoon;

Query OK, 0 rows affected (0.00 sec)

刷新日志：

mysql> flush logs;

Query OK, 0 rows affected (0.01 sec)

mysql> select * from yoon;

ERROR 1146 (42S02): Table 'sakila.yoon' doesn't
exist

mysql> show master status;

+------------------+----------+--------------+------------------+

| File      
      | Position
| Binlog_Do_DB | Binlog_Ignore_DB |

+------------------+----------+--------------+------------------+

| mysql-bin.000026 |    
 107 |    
     
   |  
     
     
   |

+------------------+----------+--------------+------------------+

1 row in set (0.00 sec)

[root@yoon data]# ls

ibdata1  ib_logfile0  ib_logfile2
 mysql-bin.000025
 mysql-bin.index  
  rocover.sql
 test

ibdata2  ib_logfile1  mysql
     
 mysql-bin.000026
 performance_schema
 sakila

[root@yoon data]# mysqlbinlog mysql-bin.000025 | grep --ignore-case
DROP -A3 -B4

;

SET
@@session.character_set_client=33,@@session.collation_connection=33,@@session.collation_server=33;

SET @@session.lc_time_names=0;

SET @@session.collation_database=DEFAULT;

DROP TABLE `yoon`

;

# at 215

#150814  3:34:55 server id 360360
 end_log_pos 379  
   Query  
thread_id=1     exec_time=3215
 error_code=0

--

COMMIT;

# at 932

#150814  4:42:00 server id 360360
 end_log_pos 1040  
  Query   thread_id=1
    exec_time=0
    error_code=0

SET TIMESTAMP=1439541720;

DROP TABLE `yoon`

;

# at 1040

#150814  4:42:10 server id 360360
 end_log_pos 1083  
  Rotate to mysql-bin.000026
 pos: 4

mysql> select from_unixtime('1439541720');

+-----------------------------+

| from_unixtime('1439541720') |

+-----------------------------+

| 2015-08-14 04:42:00    
    |

+-----------------------------+

1 row in set (0.00 sec)

###如果从上次备份刷新binlog，到发现表被删掉的过程中产生了多个binlog，则要按照binlog产生的顺序，
那么恢复的次序应该是按照binglog的产生的序号，从小到大依次恢复###

[root@yoon data]# mysqlbinlog -d sakila --stop-datetime='2015-08-14
04:42:00' mysql-bin.000025 > recover_sakila.sql

[root@yoon data]# mysql -uroot -p <
recover_sakila.sql 

Enter password: 

mysql> select * from yoon;

+----+------+

| id | name |

+----+------+

|  1 | yoon |

|  7 | aaa  |

+----+------+

2 rows in set (0.00 sec)

过滤方法：（因为测试中只有一个表，而生产环境中就会有多张表）

[root@yoon data]# more recover_sakila.sql | grep --ignore-case -E
'insert|update|select|delete' -A2 -B2 | grep yoon

​如果表名包含yoon_log,yoon_order,只想导出yoon表的话，+个-w

​[root@yoon
data]# more recover_sakila.sql | grep --ignore-case -E 'insert' -A2
-B2 | grep -w yoon​
> yoon.sql

insert into yoon(name) values ('yoon')

insert into yoon(name) values ('aaa')

[root@yoon data]# more recover_sakila.sql | grep --ignore-case -E
'create' -A2 -B2 | grep yoon    
     
     
     
 
  

create table yoon (id int(11) unsigned NOT NULL AUTO_INCREMENT,name
varchar(20),PRIMARY KEY (`id`))