通过 MySQL 二进制日志恢复删除的记录

删除 MySQL 表中的数据

mysql> use sbtest;
mysql> select count(*) from sbtest1;
+----------+
| count(*) |
+----------+
|     1000 |
+----------+
1 row in set (0.00 sec)

mysql> delete from sbtest1;
Query OK, 1000 rows affected (0.21 sec)

mysql> select count(*) from sbtest1;
+----------+
| count(*) |
+----------+
|        0 |
+----------+
1 row in set (0.00 sec)

确认时间点和当前二进制日志文件，从二进制日志中读取操作记录

mysqlbinlog --start-datetime="2018-09-27 15:55:00" --stop-datetime="2018-09-27 15:00:00" --base64-output=decode-rows --result-file=result.sql -v /var/lib/mysql/binlog.000022

其中的一条记录

去除不相关的内容

grep -A 5 "DELETE FROM \`sbtest\`.\`sbtest1\`" result.sql > 1.txt

提取数据

grep "=" 1.txt > 2.txt
sed -i ‘s/###   //g‘ 2.txt 

使用以下脚本生成 INSERT 语句

[[email protected] tmp]# cat r2.sh
#!/bin/bash
vs=""
while read line
do
    n=`echo $line | awk -NF "=" ‘{print $1}‘`
    v=`echo $line | awk -NF "=" ‘{print $2}‘`
    if [ "$n" = "@1" ]; then
        vs="INSERT INTO \`sbtest\`.\`sbtest1\` VALUES("$v
    elif [ "$n" = "@2" ]; then
        vs=$vs" , "$v
    elif [ "$n" = "@3" ]; then
        vs=$vs" , "$v
    elif [ "$n" = "@4" ]; then
        vs=$vs" , "$v");"
        echo $vs >> 3.txt
    fi
done < 2.txt
[[email protected] tmp]# sh r2.sh 

将数据导入到 MySQL 表中

[[email protected] tmp]# mysql < 3.txt
mysql> select count(*) from sbtest1;
+----------+
| count(*) |
+----------+
|     1000 |
+----------+
1 row in set (0.00 sec)

原文地址：http://blog.51cto.com/linux10000/2286654