How to recover data through binlog

What is binlog

binlog is mainly used for master-slave replication and data recovery

binlog brain map

How to check whether binlog is turned on? How to open

Explain that it is closed at this time, then how to open binlog?

server_id=2
log_bin = mysql-bin
binlog_format = statement
expire_logs_days = 30
restart mysql

There are several formats of binlog

1. The statement currently uses this
2. If row is not configured, the default is row mysql 5.7 or higher
3. Mixed

How to recover data through binlog in mysql

Let’s first create a table, the
current state

, the actual location of the current log record

– Create a table
crete table eee (id.int,c1 varchar(100),c2 varchar(100))
insert into eee(id, c1,c2) ​​values ​​(1,'test 1c1','test c2');
insert into eee(id, c1,c2) ​​values ​​(1,'test 2c1','test c2');
insert into eee(id, c1,c2) ​​values ​​(1,'test 3c1','test c2');
– update /Delete
update ccc set c2='modify' where id=2;

At this time, if I mistakenly deleted the table
drop table ccc;


mysqlbinlog --no-defaults /usr/local/mysql/data/mysql-bin.000005

执行mysqlbinlog --no-defaults /usr/local/mysql/data/mysql-bin.000005 --start-position=154 --stop-position=1607 | mysql -uroot -proot wly_test1

Restored at this time

How to use row format to recover data?

mysqlbinlog --base64-output=decode-rows -v mysql-bin.000001