MySQLUpdate误操作回滚(转)

Posted moss_tan_jun

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前言:
      继上一篇mysql【Delete误操作】回滚之后,现在介绍下Update回滚,操作数据库时候难免会因为“大意”而误操作,需要快速恢复的话通过备份来恢复是不太可能的,因为需要还原和binlog差来恢复,等不了,很费时。这里说明因为Update 操作的恢复方法:主要还是通过binlog来进行恢复,前提是binlog_format必须是Row格式,否则只能通过备份来恢复数据了。和上一篇的条件一样。
方法:
     条件:开启Binlog,Format为Row。
     步骤:
1.通过MySQL自带工具mysqlbinlog 指定导出操作的记录:
表结构和记录数:

复制代码
root@localhost : test 10:06:16>select count(*) from me_info;
+----------+
| count(*) |
+----------+
|    84183 |
+----------+
1 row in set (0.00 sec)

root@localhost : test 10:12:14>select id,realName,contactAddress from me_info limit 3;
+---------+--------------------------+--------------------+
| id      | realName                 | contactAddress     |
+---------+--------------------------+--------------------+
| 2123269 | 数据库管理员             | 浙江杭州滨江       |
| 2123270 | 中级数据库管理员         | 浙江杭州西湖       |
| 2123271 | 高级数据库管理员         | 浙江杭州余杭       |
+---------+--------------------------+--------------------+

root@localhost : test 10:12:18>desc me_info;
+-----------------+--------------+------+-----+---------+-------+
| Field           | Type         | Null | Key | Default | Extra |
+-----------------+--------------+------+-----+---------+-------+
| id              | int(11)      | NO   | MUL | 0       |       |
| birthTime       | date         | YES  |     | NULL    |       |
| enName          | varchar(255) | YES  |     | NULL    |       |
| gender          | tinyint(2)   | YES  |     | 0       |       |
| identity        | varchar(255) | YES  |     |         |       |
| identitylType   | tinyint(2)   | YES  |     | 0       |       |
| interest        | varchar(255) | YES  |     |         |       |
| jobYear         | int(11)      | YES  |     | 0       |       |
| livePlace       | mediumint(6) | YES  |     | 0       |       |
| location        | mediumint(6) | YES  |     | 0       |       |
| married         | tinyint(2)   | YES  |     | 0       |       |
| mdCerti         | tinyint(2)   | YES  |     | 0       |       |
| mdCertiNum      | varchar(255) | YES  |     |         |       |
| photo           | varchar(255) | YES  |     |         |       |
| posit           | mediumint(6) | YES  |     | NULL    |       |
| graduateMajor   | int(11)      | YES  |     | 0       |       |
| realName        | varchar(255) | YES  |     | NULL    |       |
| userPublic      | tinyint(2)   | YES  |     | NULL    |       |
| email           | varchar(255) | YES  |     | NULL    |       |
| contactCell     | varchar(255) | YES  |     | NULL    |       |
| contactPhone    | varchar(255) | YES  |     | NULL    |       |
| contactZip      | varchar(6)   | YES  |     | NULL    |       |
| contactWebsite  | varchar(255) | YES  |     | NULL    |       |
| contactLocation | mediumint(6) | YES  |     | 0       |       |
| contactAddress  | varchar(255) | YES  |     | NULL    |       |
| userName        | varchar(50)  | YES  |     | NULL    |       |
| education       | int(11)      | YES  |     | 0       |       |
| workName        | varchar(255) | YES  |     | NULL    |       |
| workCategory    | varchar(255) | YES  |     | NULL    |       |
| nowSalary       | int(11)      | YES  |     | 0       |       |
| grade           | int(11)      | YES  |     | 0       |       |
| userId          | int(11)      | YES  |     | 0       |       |
| jobApplyStatus  | tinyint(4)   | YES  |     | NULL    |       |
| source          | tinyint(4)   | YES  |     | NULL    |       |
| englishLevel    | tinyint(4)   | YES  |     | 0       |       |
| modifyTime      | datetime     | YES  |     | NULL    |       |
+-----------------+--------------+------+-----+---------+-------+
复制代码

更新表:

复制代码
root@localhost : test 10:15:09>update me_info set realName=\'周吴郑王\',contactAddress=\'浙江vv杭州vv北京\';
Query OK, 84183 rows affected (1.56 sec)
Rows matched: 84183  Changed: 84183  Warnings: 0

root@localhost : test 11:11:08>select id,realName,contactAddress from me_info limit 3;
+---------+--------------+------------------------+
| id      | realName     | contactAddress         |
+---------+--------------+------------------------+
| 2123269 | 周吴郑王     | 浙江vv杭州vv北京       |
| 2123270 | 周吴郑王     | 浙江vv杭州vv北京       |
| 2123271 | 周吴郑王     | 浙江vv杭州vv北京       |
+---------+--------------+------------------------+
3 rows in set (0.00 sec)
复制代码

最后通过mysqlbinlog 取出:

root@zhoujy:/var/log/mysql# mysqlbinlog --no-defaults --start-datetime=\'2012-12-26 22:15:05\' --stop-datetime=\'2012-12-26 22:17:00\'  -vv mysql-bin.000001 > /home/zhoujy/restore/me_info.txt

原始数据:

复制代码
### UPDATE test.me_info
### WHERE
###   @1=2123269 /* INT meta=0 nullable=0 is_null=0 */
###   @2=\'1990:11:12\' /* DATE meta=0 nullable=1 is_null=0 */
###   @3=NULL /* DATE meta=765 nullable=1 is_null=1 */
###   @4=2 /* TINYINT meta=0 nullable=1 is_null=0 */
###   @5=\'\' /* VARSTRING(765) meta=765 nullable=1 is_null=0 */
###   @6=0 /* TINYINT meta=0 nullable=1 is_null=0 */
###   @7=\'\' /* VARSTRING(765) meta=765 nullable=1 is_null=0 */
###   @8=-1 (4294967295) /* INT meta=0 nullable=1 is_null=0 */
###   @9=0 /* MEDIUMINT meta=0 nullable=1 is_null=0 */
###   @10=340800 /* MEDIUMINT meta=0 nullable=1 is_null=0 */
###   @11=1 /* TINYINT meta=0 nullable=1 is_null=0 */
###   @12=0 /* TINYINT meta=0 nullable=1 is_null=0 */
###   @13=\'\' /* VARSTRING(765) meta=765 nullable=1 is_null=0 */
###   @14=\'\' /* VARSTRING(765) meta=765 nullable=1 is_null=0 */
###   @15=0 /* MEDIUMINT meta=0 nullable=1 is_null=0 */
###   @16=32071 /* INT meta=0 nullable=1 is_null=0 */
###   @17=\'数据库管理员\' /* VARSTRING(765) meta=765 nullable=1 is_null=0 */
###   @18=NULL /* VARSTRING(765) meta=0 nullable=1 is_null=1 */
###   @19=\'123456@qq.comx0a\' /* VARSTRING(765) meta=765 nullable=1 is_null=0 */
###   @20=\'123456\' /* VARSTRING(765) meta=765 nullable=1 is_null=0 */
###   @21=\'0571-123456\' /* VARSTRING(765) meta=765 nullable=1 is_null=0 */
###   @22=NULL /* VARSTRING(765) meta=18 nullable=1 is_null=1 */
###   @23=\'\' /* VARSTRING(765) meta=765 nullable=1 is_null=0 */
###   @24=340100 /* MEDIUMINT meta=0 nullable=1 is_null=0 */
###   @25=\'浙江杭州滨江\' /* VARSTRING(765) meta=765 nullable=1 is_null=0 */
###   @26=NULL /* VARSTRING(765) meta=150 nullable=1 is_null=1 */
###   @27=1 /* INT meta=0 nullable=1 is_null=0 */
###   @28=NULL /* INT meta=765 nullable=1 is_null=1 */
###   @29=NULL /* INT meta=765 nullable=1 is_null=1 */
###   @30=0 /* INT meta=0 nullable=1 is_null=0 */
###   @31=0 /* INT meta=0 nullable=1 is_null=0 */
###   @32=1700671 /* INT meta=0 nullable=1 is_null=0 */
###   @33=NULL /* INT meta=0 nullable=1 is_null=1 */
###   @34=3 /* TINYINT meta=0 nullable=1 is_null=0 */
###   @35=0 /* TINYINT meta=0 nullable=1 is_null=0 */
###   @36=NULL /* TINYINT meta=0 nullable=1 is_null=1 */
### SET
###   @1=2123269 /* INT meta=0 nullable=0 is_null=0 */
###   @2=\'1990:11:12\' /* DATE meta=0 nullable=1 is_null=0 */
###   @3=NULL /* DATE meta=765 nullable=1 is_null=1 */
###   @4=2 /* TINYINT meta=0 nullable=1 is_null=0 */
###   @5=\'\' /* VARSTRING(765) meta=765 nullable=1 is_null=0 */
###   @6=0 /* TINYINT meta=0 nullable=1 is_null=0 */
###   @7=\'\' /* VARSTRING(765) meta=765 nullable=1 is_null=0 */
###   @8=-1 (4294967295) /* INT meta=0 nullable=1 is_null=0 */
###   @9=0 /* MEDIUMINT meta=0 nullable=1 is_null=0 */
###   @10=340800 /* MEDIUMINT meta=0 nullable=1 is_null=0 */
###   @11=1 /* TINYINT meta=0 nullable=1 is_null=0 */
###   @12=0 /* TINYINT meta=0 nullable=1 is_null=0 */
###   @13=\'\' /* VARSTRING(765) meta=765 nullable=1 is_null=0 */
###   @14=\'\' /* VARSTRING(765) meta=765 nullable=1 is_null=0 */
###   @15=0 /* MEDIUMINT meta=0 nullable=1 is_null=0 */
###   @16=32071 /* INT meta=0 nullable=1 is_null=0 */
###   @17=\'周吴郑王\' /* VARSTRING(765) meta=765 nullable=1 is_null=0 */
###   @18=NULL /* VARSTRING(765) meta=0 nullable=1 is_null=1 */
###   @19=\'123456@qq.comx0a\' /* VARSTRING(765) meta=765 nullable=1 is_null=0 */
###   @20=\'123456\' /* VARSTRING(765) meta=765 nullable=1 is_null=0 */
###   @21=\'0571-123456\' /* VARSTRING(765) meta=765 nullable=1 is_null=0 */
###   @22=NULL /* VARSTRING(765) meta=18 nullable=1 is_null=1 */
###   @23=\'\' /* VARSTRING(765) meta=765 nullable=1 is_null=0 */
###   @24=340100 /* MEDIUMINT meta=0 nullable=1 is_null=0 */
###   @25=\'浙江vv杭州vv北京\' /* VARSTRING(765) meta=765 nullable=1 is_null=0 */
###   @26=NULL /* VARSTRING(765) meta=150 nullable=1 is_null=1 */
###   @27=1 /* INT meta=0 nullable=1 is_null=0 */
###   @28=NULL /* INT meta=765 nullable=1 is_null=1 */
###   @29=NULL /* INT meta=765 nullable=1 is_null=1 */
###   @30=0 /* INT meta=0 nullable=1 is_null=0 */
###   @31=0 /* INT meta=0 nullable=1 is_null=0 */
###   @32=1700671 /* INT meta=0 nullable=1 is_null=0 */
###   @33=NULL /* INT meta=0 nullable=1 is_null=1 */
###   @34=3 /* TINYINT meta=0 nullable=1 is_null=0 */
###   @35=0 /* TINYINT meta=0 nullable=1 is_null=0 */
###   @36=NULL /* TINYINT meta=0 nullable=1 is_null=1 */
复制代码

Row格式的binlog记录的格式如上面所示,需要做的工作就是把Update的操作的WHERE好SET对调,上面的都是有一定规律的,并且需要注意的是:
除了MySQL【Delete误操作】回滚事项外,还有
①:需要把@表示的“虚列”换成“实列”。
②:更新NULL值的时候,WHERE 后面的字段有NULL的,不能用“=”号,需要用“is”。
清楚里之后,可以用脚本来还原刚才update的值:

复制代码
#!/bin/env python
# -*- encoding: utf-8 -*-
#-------------------------------------------------------------------------------
# Name:        restore_update.py
# Purpose:     通过Binlog恢复Update误操作数据
# Author:      zhoujy
# Created:     2012-12-26
# update:      2012-12-26
# Copyright:   (c) Mablevi 2012
# Licence:     zjy
# Usage:       python restore_update.py binlog.txt tablename
#-------------------------------------------------------------------------------
import MySQLdb
import sys
reload(sys)
sys.setdefaultencoding("utf-8")

def get_column(conn,tbname):                                                                                  #从库中取字段"实名",代替@字段名。
    query = "select group_concat(COLUMN_NAME) from information_schema.COLUMNS where TABLE_NAME=\'%s\'" %tbname
    cursor = conn.cursor()
    cursor.execute(query)
    items = cursor.fetchone()
    return items
def read_binlog(file,tbname,column):
    f = open(file)
    columns = column.split(\',\')
    num = \'@\'+str(len(columns))                                                                               #取字段数
    while True:
        lines = f.readline()
        if lines.strip()[0:3] == \'###\':
            lines=lines.split(\' \',3)
            if lines[1].strip() == \'WHERE\':                                                                    #SET和WHERE对调。
                lines[1] = "SET"
                sep1 = \',\'
                sep2 = \'\'                                                                                      #如果是SET 后面的字段,则用这些定义的分隔符。
                sep3 = \' = \'
                lines[-1] = lines[-1].strip()
            elif lines[1].strip() == \'SET\':                                                                    #SET和WHERE对调。
                lines[1] = "WHERE"
                lines[-1] = lines[-1].strip()
                sep1 = \'\\nand\'
                sep2 = \';\\n\'                                                                                   #WHERE 后面的字段,则用这些定义的分隔符。
                sep3 = \' is \'
            else:
                lines[-1] = lines[-1].strip()
            if  \'\'.join(lines).find(\'@\') <> -1 and lines[3].split(\'=\',1)[0] <> num:
                c = int(lines[3].split(\'=\',1)[0].split(\'@\')[1])
                col = columns[c-1]                                                                             #取实名字段。
                lines[3] = lines[3].split(\'=\',1)[-1].strip()
                if lines[3].strip(\'\\\'\').strip().find(\'\\\'\') <> -1:
                    lines[3] = lines[3].split(\'/*\')[0].strip(\'\\\'\').strip().strip(\'\\\'\').replace(\'\\\\\',\'\').replace(\'\\\'\',\'\\\\\\\'\')
                    lines[3] = col + " = " + \'\\\'\' + lines[3] + \'\\\'\' + sep1
                elif lines[3].find(\'INT meta\') <> -1 and lines[3].find(\'NULL\') == -1:
                    lines[3] = lines[3].split(\'/*\')[0].strip()
                    lines[3] = col + " = " + lines[3].split()[0] + sep1
                elif lines[3].find(\'NULL\') <> -1:                                                              #和Delete脚本一样,不一样的是分隔符。
                    lines[3] = lines[3].split(\'/*\')[0].strip()
                    lines[3] = col + sep3 + lines[3] + sep1
                else:
                    lines[3] = lines[3].split(\'/*\')[0].strip(\'\\\'\').strip().strip(\'\\\'\').replace(\'\\\\\',\'\').replace(\'\\\'\',\'\\\\\\\'\')
                    lines[3] = col + " = " + \'\\\'\' + lines[3].strip(\'\\\'\'\' \') + \'\\\'\' + sep1
            if  \'\'.join(lines).find(\'@\') <> -1 and lines[3].split(\'=\',1)[0] == num:
                c = int(lines[3].split(\'=\',1)[0].split(\'@\')[1])
                col = columns[c-1]
                lines[3] = lines[3].split(\'=\',1)[-1].strip()
                if lines[3].strip(\'\\\'\').strip().find(\'\\\'\') <> -1:
                    lines[3] = lines[3].split(\'/*\')[0].strip(\'\\\'\').strip().strip(\'\\\'\').replace(\'\\\\\',\'\').replace(\'\\\'\',\'\\\\\\\'\')
                    lines[3] = col + " = " + \'\\\'\' + lines[3] + \'\\\'\' + sep2
                elif lines[3].find(\'INT meta\') <> -1 and lines[3].find(\'NULL\') == -1:
                    lines[3] = lines[3].split(\'/*\')[0].strip()
                    lines[3] = col + " = " + lines[3].split()[0] + sep2
                elif lines[3].find(\'NULL\') <> -1:                                                              #和Delete脚本一样,不一样的是分隔符。
                    lines[3] = lines[3].split(\'/*\')[0].strip()
                    lines[3] = col + sep3 + lines[3] + sep2
                else:
                    lines[3] = lines[3].split(\'/*\')[0].strip(\'\\\'\').strip().strip(\'\\\'\').replace(\'\\\\\',\'\').replace(\'\\\'\',\'\\\\\\\'\')
                    lines[3] = col + " = " + \'\\\'\' + lines[3].strip(\'\\\'\'\' \') + \'\\\'\' + sep2
            print \' \'.join(lines[1:])
        if lines == \'\':
            break
if __name__==\'__main__\':
    conn = MySQLdb.connect(host=\'localhost\',user=\'root\',passwd=\'123456\',charset=\'utf8\',db=\'test\')
    col = get_column(conn,sys.argv[2])
    for column in col:
        read_binlog(sys.argv[1],sys.argv[2],column)
复制代码

 执行脚本:格式:python 脚本名 binlog文本 表名

zhoujy@zhoujy:~/restore$ python restore_update.py me_info.txt me_info > me_info.sql

效果:

复制代码
PDATE test.me_info
SET
  id = 2123269,
  birthTime = \'1990:11:12\',
  enName = NULL,
  gender = 2,
  identity = \'\',
  identitylType = 0,
  interest = \'\',
  jobYear = -1,
  livePlace = 0,
  location = 340800,
  married = 1,
  mdCerti = 0,
  mdCertiNum = \'\',
  photo = \'\',
  posit = 0,
  graduateMajor = 32071,
  realName = \'数据库管理员\',
  userPublic = NULL,
  email = \'123456@qq.comx0a\',
  contactCell = \'123456\',
  contactPhone = \'0571-123456\',
  contactZip = NULL,
  contactWebsite = \'\',
  contactLocation = 340100,
  contactAddress = \'浙江杭州滨江\',
  userName = NULL,
  education = 1,
  workName = NULL,
  workCategory = NULL,
  nowSalary = 0,
  grade = 0,
  userId = 1700671,
  jobApplyStatus = NULL,
  source = 3,
  englishLevel = 0,
  modifyTime = NULL
WHERE
  id = 2123269
and
  birthTime = \'1990:11:12\'
and
  enName is NULL
and
  gender = 2
and
  identity = \'\'
and
  identitylType = 0
and
  interest = \'\'
and
  jobYear = -1
and
  livePlace = 0
and
  location = 340800
and
  married = 1
and
  mdCerti = 0
and
  mdCertiNum = \'\'
and
  photo = \'\'
and
  posit = 0
and
  graduateMajor = 32071
and
  realName = \'周吴郑王\'
and
  userPublic is NULL
and
  email = \'123456@qq.comx0a\'
and
and
  contactCell = \'123456\'
and
  contactPhone = \'0571-123456\'
and
  contactZip is NULL
and
  contactWebsite = \'\'
and
  contactLocation = 340100
and
  contactAddress = \'浙江vv杭州vv北京\'
and
  userName is NULL
and
  education = 1
and
  workName is NULL
and
  workCategory is NULL
and
  nowSalary = 0
and
  grade = 0
and
  userId = 1700671
and
  jobApplyStatus is NULL
and
  source = 3
and
  englishLevel = 0
and
  modifyTime is NULL;
复制代码

还原:

zhoujy@zhoujy:~/restore$ mysql test < me_info.sql

结果,表结果和记录数: