教你MySQL数据库误删回滚的解决方法
某次一不小心,用了delete from 删除了几条重要数据,在网上找了很多方法,但都比较零散,打算记录本次数据找回的过程。
大致分为以下几步
1、查看binlog是否开启
# log_bin是ON,就说明打开了 OFF就是关闭状态,以下操作,只有为 ON 时有效。
show variables like ‘log_bin’;
show variables like ‘log_bin’;
2、找到binlog文件名
show master logs;
运行以上代码,如下图 TS1-bin.000009 就是我们要找的文件名
3、查看binlog日志位置
show variables like ‘%datadir%’;
4、根据上面得到的位置,去找到 TS1-bin.000009 文件
5、进入到mysql安装目录的bin目录下,执行以下命令根据误删除的时间范围从TS1-bin.000009文件导出成sql文件
mysqlbinlog –base64-output=decode-rows -v –database=数据库名 –start-datetime=”2022-06-29 15:35:00″ –stop-datetime=”2022-06-29 15:45:00″ C:/Users/Administrator/Desktop/TS1-bin.000009 > C:/Users/Administrator/Desktop/mysqllog.sql
这里我把 TS1-bin.000009 文件拷贝到了桌面,因为该文件原始存放路径有空格,导致命令执行失败,无法找到路径。
得到 mysqllog.sql 文件后,可以用记事本打开,搜索 DELETE 关键字,找到删除数据的记录
6、将 DELETE 语句改造成 INSERT 语句,在windows下用vbs来实现,把下面代码复制保存为:deleteToinsert.vbs 文件(一定要是.vbs格式文件) 与mysqllog.sql在同一目录下,然后双击运行,会生成mysqllogOK.sql文件就是我们要的INSERT语句
‘==========================
‘用VBS实现 MYSQL binglog DELETE转INSERT
‘==========================
function replaceregex(patern,str,tagstr)
dim regex,matches
set regex=new regExp
regex.pattern=patern
regex.IgnoreCase=true
regex.global=true
matches=regex.replace(str,tagstr)
replaceregex=matches
end function
‘======Mysql binlog DELETE转INSERT================
‘VBS打开文本文件
Set oldStream = CreateObject(“ADODB.Stream”)
oldStream.CharSet = “utf-8”
oldStream.Open
oldStream.LoadFromFile(“mysqllog.sql”) ‘binLog生成的DELETE原日志文件
oldText = oldStream.ReadText()
newText=replace(oldText,”### DELETE FROM”, “;INSERT INTO”)
newText=replace(newText,”### WHERE”, “SELECT”)
newText=replace(newText,”###”, “”)
newText=replace(newText,”@1=”, “”)
newText=replaceregex(“\@[1-9]=”,newText, “,”)
newText=replaceregex(“\@[1-9][0-9]=”,newText, “,”)
oldStream.Close
‘VBS保存文件
Set newStream = CreateObject(“ADODB.Stream”)
newStream.Type = 2 ‘Specify stream type – we want To save text/string data.
newStream.Charset = “utf-8” ‘Specify charset For the source text data.
newStream.Open ‘Open the stream And write binary data To the object
newStream.WriteText newText
newStream.SaveToFile “mysqllogOK.sql”, 2 ‘DELETE转成INSERT以后的新的SQL文件名
newStream.Close
‘用VBS实现 MYSQL binglog DELETE转INSERT
‘==========================
function replaceregex(patern,str,tagstr)
dim regex,matches
set regex=new regExp
regex.pattern=patern
regex.IgnoreCase=true
regex.global=true
matches=regex.replace(str,tagstr)
replaceregex=matches
end function
‘======Mysql binlog DELETE转INSERT================
‘VBS打开文本文件
Set oldStream = CreateObject(“ADODB.Stream”)
oldStream.CharSet = “utf-8”
oldStream.Open
oldStream.LoadFromFile(“mysqllog.sql”) ‘binLog生成的DELETE原日志文件
oldText = oldStream.ReadText()
newText=replace(oldText,”### DELETE FROM”, “;INSERT INTO”)
newText=replace(newText,”### WHERE”, “SELECT”)
newText=replace(newText,”###”, “”)
newText=replace(newText,”@1=”, “”)
newText=replaceregex(“\@[1-9]=”,newText, “,”)
newText=replaceregex(“\@[1-9][0-9]=”,newText, “,”)
oldStream.Close
‘VBS保存文件
Set newStream = CreateObject(“ADODB.Stream”)
newStream.Type = 2 ‘Specify stream type – we want To save text/string data.
newStream.Charset = “utf-8” ‘Specify charset For the source text data.
newStream.Open ‘Open the stream And write binary data To the object
newStream.WriteText newText
newStream.SaveToFile “mysqllogOK.sql”, 2 ‘DELETE转成INSERT以后的新的SQL文件名
newStream.Close
7、拿到对应的 INSERT 语句后执行。
参考文章
https://blog.csdn.net/qq_36602951/article/details/120729047
https://juejin.cn/post/7028955574242902023
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