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怎么用mysqlbinlog做基于时间点的数据恢复

发表于：2024-11-19 作者：千家信息网编辑

千家信息网最后更新 2024年11月19日，这篇文章将为大家详细讲解有关怎么用mysqlbinlog做基于时间点的数据恢复，小编觉得挺实用的，因此分享给大家做个参考，希望大家阅读完这篇文章后可以有所收获。mysql> show database

千家信息网最后更新 2024年11月19日怎么用mysqlbinlog做基于时间点的数据恢复

这篇文章将为大家详细讲解有关怎么用mysqlbinlog做基于时间点的数据恢复，小编觉得挺实用的，因此分享给大家做个参考，希望大家阅读完这篇文章后可以有所收获。

mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| test |
+--------------------+
4 rows in set (0.00 sec)

mysql> use test
Database changed
mysql> show tables;
Empty set (0.00 sec)

mysql> show binary logs;
+------------------+-----------+
| Log_name | File_size |
+------------------+-----------+
| mysql-bin.000001 | 120 |
+------------------+-----------+
1 row in set (0.00 sec)

mysql>
mysql>
mysql> flush logs;
Query OK, 0 rows affected (0.16 sec)

mysql> show binary logs;
+------------------+-----------+
| Log_name | File_size |
+------------------+-----------+
| mysql-bin.000001 | 167 |
| mysql-bin.000002 | 120 |
+------------------+-----------+
2 rows in set (0.00 sec)

创建一个新表chenfeng并插入三条记录:
mysql> create table chenfeng(t1 int not null primary key,t2 varchar(50),t3 datetime);
Query OK, 0 rows affected (0.13 sec)

mysql> insert into chenfeng values (1,"beijing",now());
Query OK, 1 row affected (0.02 sec)

mysql> insert into chenfeng values (2,"shanghai",now());
Query OK, 1 row affected (0.02 sec)

mysql> insert into chenfeng values (3,"zhengzhou",now());
Query OK, 1 row affected (0.03 sec)

mysql> select * from chenfeng;
+----+-----------+---------------------+
| t1 | t2 | t3 |
+----+-----------+---------------------+
| 1 | beijing | 2017-01-25 15:33:54 |
| 2 | shanghai | 2017-01-25 15:34:08 |
| 3 | zhengzhou | 2017-01-25 15:34:23 |
+----+-----------+---------------------+
3 rows in set (0.00 sec)

现在我们执行delete误操作，删除所有的数据：
mysql> delete from chenfeng;
Query OK, 3 rows affected (0.04 sec)

先查看binlog,生成002.sql:
mysqlbinlog mysql-bin.000002 > 002.sql

查看002.sql,并只摘取delete部分内容:
BEGIN
/*!*/;
# at 1094
#170125 15:37:10 server id 1 end_log_pos 1188 CRC32 0x53d8348f Query thread_id=197 exec_time=0 error_code=0
SET TIMESTAMP=1485329830/*!*/;
delete from chenfeng
/*!*/;
# at 1188
#170125 15:37:10 server id 1 end_log_pos 1219 CRC32 0xfe067937 Xid = 25
COMMIT/*!*/;
DELIMITER ;
# End of log file
ROLLBACK /* added by mysqlbinlog */;
/*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/;
/*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=0*/;

可以看到在时间2017-01-25 15:37:10我们做了delete误操作。现在需要用mysqlbinlog恢复到这个时间点前的数据:
# mysqlbinlog mysql-bin.000002 --stop-date='2017-01-25 15:37:10' > resume.sql

执行resume.sql内容后发现数据已恢复:
mysql> select * from chenfeng;
+----+-----------+---------------------+
| t1 | t2 | t3 |
+----+-----------+---------------------+
| 1 | beijing | 2017-01-25 15:33:54 |
| 2 | shanghai | 2017-01-25 15:34:08 |
| 3 | zhengzhou | 2017-01-25 15:34:23 |
+----+-----------+---------------------+
3 rows in set (0.00 sec)