Home Database Mysql Tutorial phpmyadmin误删表后的恢复过程(心惊胆跳啊)

phpmyadmin误删表后的恢复过程(心惊胆跳啊)

Jun 07, 2016 pm 03:28 PM
phpmyadmin recover Mistakenly deleted process

话说今天不知道是抽风了还是失魂了,在用phpmyadmin删除测试数据时,竟然将整个表删除了: 等程序运行出错时,才出现整个表都没有了,而且之前也没有备份好!这下蛋疼了,这个可是production服务器,里面的数据可不能丢啊! 服务器是linux的,我不是很熟悉,

话说今天不知道是抽风了还是失魂了,在用phpmyadmin删除测试数据时,竟然将整个表删除了:

\

\ 等程序运行出错时,才出现整个表都没有了,而且之前也没有备份好!这下蛋疼了,这个可是production服务器,里面的数据可不能丢啊! 服务器是linux的,我不是很熟悉,也不知道mysql装在哪。无奈之下,google,发现有不少人也有像我一样犯傻的一回,但是几乎没有看到具体的解决方法(有说用硬盘软件找回,也有说用二进制文件找回),但是我本身对服务器不大懂,觉得好纠结,那边又在催说数据怎么没有了,还说一定得找回来。这下我更急了,晚饭都没心情吃。 这时,我找到了一些专门帮人恢复数据的技术人员。他问了我数据量,数据库引擎,当我说是‘myisam’时,他来了句:那无解了。。当时我一下子懵了。 情急之下,我想到了,之前在testing服务器里面有一个副本数据库,但是那里的数据已经有些时日了,根本没有最新一个月的数据。这根本无法解救我! 这里我在phpmyadmin中看到了这个: \ 脑里出来了google上说的用二进制恢复,就点开看一下。结果大喜!OMG,服务器开通了日志! \ 里面有数据库的操作日志,而且还是sql格式的!!!我之前没有接触过这个东西,但这时它就是我的救命稻草。我浏览了一下,里面有近一个月的更新记录,已经足够了。不过有一个问题,在phpmyadmin里面看,只能显示其中一小部份内容,面对10几w的数据行,想要一个个找出被删表的数据,太难了。 这时,我想到了可以从服务器中下载这些文件,然后得到其中的数据。说干就干,我登录服务器,搜索这些二进制文件: \ 上图中红圈的就是了 然后将这些文件一个个导出成可以阅读的sql: \ 这样将这些二进制文件一个个输出成了正常的sql文件。 这时,就是要从这些文件中找到被删表相关的数据了,于是我写了个java程序帮我做这个事情:
package com.nerve.sql.reload;
 
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.ArrayList;
import java.util.List;
 
import org.nerve.util.NumberUtil;
 
/**
 * @project: cloudOffice_swing
 * @file: ReloadWorker.java
 * @package: com.nerve.sql.reload
 * @description:
 *    将二进制日志导出的文件中相应表的操作记录提出出来
 * @author: 集成显卡    1053214511@qq.com
 * @date&time: Jan 23, 2014
 * @change log:
 */
public class ReloadWorker {
    
    public void read(List<String> orgF, String targetF, String table) throws Exception{
        BufferedWriter bw = new BufferedWriter(new FileWriter(targetF, true));
        
        for(String or:orgF){
            BufferedReader br = new BufferedReader(new FileReader(or));
            String t = null;
            String t2 = null;
            table = table.toUpperCase();
            while((t=br.readLine())!=null){
                t2 = t.toUpperCase();
                /*
                 * 如果是update操作,直接提出
                 */
                if(t2.startsWith("UPDATE "+table)){
                    bw.append(t+";\n");
                }
                /*
                 *  如果是insert语句,因为有一些旧服务器的数据
                 *  所以要先执行delete操作
                 */
                else if(t2.startsWith("INSERT INTO "+table)){
                    String ids = t2.substring(t2.lastIndexOf(","));
                    bw.append("delete from "+table+" where id="+NumberUtil.toDigital(ids)+";\n");
                    bw.append(t+";\n");
                }
                /*
                 * sql语句后面都要加 ; ,因为原来没有,不加的话,在导入到数据库时,出错
                 */
            }
            br.close();
        }
        
        bw.flush();
        bw.close();
    }
    
    public static void main(String[] args) throws Exception{
        long sd = System.currentTimeMillis();
        ReloadWorker w = new ReloadWorker();
        List<String> orgs = new ArrayList<String>();
        orgs.add("C:/Users/IBM_ADMIN/Desktop/000015.txt");
        orgs.add("C:/Users/IBM_ADMIN/Desktop/000016.txt");
        orgs.add("C:/Users/IBM_ADMIN/Desktop/000017.txt");
        orgs.add("C:/Users/IBM_ADMIN/Desktop/000018.txt");
        orgs.add("C:/Users/IBM_ADMIN/Desktop/000019.txt");
        
        String targetS = "C:/Users/IBM_ADMIN/Desktop/000017_sql.txt";
        w.read(orgs, targetS, "task");
        
        System.out.println("DONE, on " +(System.currentTimeMillis() - sd)/1000+" s");
    }
}
Copy after login
得到了汇总的sql文件后,就导入到数据库中。最后,出一个运行图: \ 终于松了一口气。(虽然这次导入花了5分钟。。) 最后提醒大家,一定要常备份,谨慎操作啊!
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