#新增資料

insert into testdb1.student(id,name,class,score) value(a,'a',1,45),(2,'b',1,46),(3,'c',2,89),(4,'d',2,90),(5,'e',3,67),(6,'f',3,87),(7,'g',4,77),(8,'h',4,91);

mysql> select * from testdb1.student;

+------+------+-------+-------+

+------+------+-------+-------+

| 1 | a | 1 | 45 |

| 2 | b | 1 | 46 |

| 3 | c | 2 | 89 |

| 4 | d | 2 | 90 |

| 5 | e | 3 | 67 |

| 6 | f | 3 | 87 |

| 7 | g | 4 | 77 |

| 8 | h | 4 | 91 |

+------+------+-------+-------+

8 rows in set (0.00 sec)

#修改資料

update student set score=100;

commit;

mysql> select * from testdb1.student;

+------+------+-------+-------+

+------+------+-------+-------+

| 1 | a | 1 | 100 |

| 2 | b | 1 | 100 |

| 3 | c | 2 | 100 |

| 4 | d | 2 | 100 |

| 5 | e | 3 | 100 |

| 6 | f | 3 | 100 |

| 7 | g | 4 | 100 |

| 8 | h | 4 | 100 |

+------+------+-------+-------+

8 rows in set (0.00 sec)

mysql> set global read_only=1

mysql> show master status\G

*************************** 1. row ***************************

File: ray-bin.000004

Position: 1992

Binlog_Do_DB:

Binlog_Ignore_DB:

Executed_Gtid_Set:

1 row in set (0.00 sec)

# at 2192是在binlog日誌中查到的

[root@localhost ~]# cat /tmp/1.txt

UPDATE testdb1.student

WHERE

@1=1

@2='a'

@3='1'

@4=45

SET

@1=1

@2='a'

@3='1'

@4=100

UPDATE testdb1.student

WHERE

@1=2

@2='b'

@3='1'

@4=46

SET

@1=2

@2='b'

@3='1'

@4=100

UPDATE testdb1.student

WHERE

@1=3

@2='c'

@3='2'

@4=89

SET

@1=3

@2='c'

@3='2'

@4=100

UPDATE testdb1.student

WHERE

@1=4

@2='d'

@3='2'

@4=90

SET

@1=4

@2='d'

@3='2'

@4=100

UPDATE testdb1.student

WHERE

@1=5

@2='e'

@3='3'

@4=67

SET

@1=5

@2='e'

@3='3'

@4=100

UPDATE testdb1.student

WHERE

@1=6

@2='f'

@3='3'

@4=87

SET

@1=6

@2='f'

@3='3'

@4=100

UPDATE testdb1.student

WHERE

@1=7

@2='g'

@3='4'

@4=77

SET

@1=7

@2='g'

@3='4'

@4=100

UPDATE testdb1.student

WHERE

@1=8

@2='h'

@3='4'

@4=91

SET

@1=8

@2='h'

@3='4'

@4=100

[root@localhost ~]# cat column.txt

id

name

class

score

[root@localhost ~]# cat getSQL.sh

#!/bin/bash

# by ray

iswhere=1 #判斷迴圈的行的位置，1表示在where後，0表示不再where後

colNum=0 #計算列數，一般在binlog日誌內第一列為@1,第二列為@2一次類推

whereNum=0 #判斷where後面欄位出現的次數，便於拼接字串，第一次出現不適用都會，第二次以後使用逗號拼接

setNum=0 #判斷set後面欄位出現的次數，便於拼接字串，第一次出現不適用都會，第二次以後使用逗號拼接

replaceColumn(){ #把@開頭的列替換為列配置檔案內的列，安配置檔案的順序執行

cat $1 | while read line

do

colNum=$[${colNum}+1]

sed -i "s/@${colNum}/${line}/g" ./execSQL.sql #替換列

done

}

getSQL(){ #獲取sql

sql1=''

sql_result=''

sql_condition=''

while read line #讀取處理過的binlog日誌

do

if [[ ${line} =~ 'UPDATE' ]];then #匹配是否update

if [ "${sql1}" != "" ];then

echo ${sql1}' '${sql_result}' '${sql_condition}';' >> ./execSQL.sql #列印sql

sql1=''

sql_result=''

sql_condition=''

whereNum=0

setNum=0

fi

sql1=${line} #拼接sql字串，獲取update

elif [[ ${line} =~ 'WHERE' ]];then

sql_condition=${line} #拼接字串，把binlog日誌內where後面內容

iswhere=1 #判斷是否為where，因為要把where和set後面的內容互換

elif [[ ${line} =~ 'SET' ]];then

sql_result=' SET '${sql_result} #拼接字串

iswhere=0

elif [[ ${iswhere} -eq 1 ]];then #1為where後面，把binlog日誌where後面的內容拼接到sql的set後

if [[ ${whereNum} -eq 0 ]];then #判斷where字串後的字串是否一次出現

sql_result=${sql_result}' '${line}

whereNum=1 #設定為1，表示不是第一次出現

elif [[ ${whereNum} -eq 1 ]];then

sql_result=${sql_result}', '${line}

fi

elif [[ ${iswhere} -eq 0 ]];then #判斷是否為set後面的字串

if [[ ${setNum} -eq 0 ]];then #判斷set字串後的字串是否一次出現

sql_condition=${sql_condition}' '${line}

setNum=1 #設定為1，表示不是第一次出現

elif [[ ${setNum} -eq 1 ]];then

sql_condition=${sql_condition}' and '${line}

fi

done < $1 #把檔案用while迴圈讀取每一行

echo ${sql1}' '${sql_result}' '${sql_condition}';' >> ./execSQL.sql #最後一行退出迴圈，所以要列印最後一行

echo "commit;" >> ./execSQL.sql

replaceColumn $2

}

#指令碼的入口，呼叫函式獲取內容

if [ -e $1 ];then #判斷第一個引數是否為檔案

getSQL $1 $2

else

echo $1' is not a file!!'

fi

[root@localhost ~]# bash getSQL.sh '/tmp/1.txt' "./column.txt"

mysql> select * from testdb1.student;

+------+------+-------+-------+

+------+------+-------+-------+

| 1 | a | 1 | 100 |

| 2 | b | 1 | 100 |

| 3 | c | 2 | 100 |

| 4 | d | 2 | 100 |

| 5 | e | 3 | 100 |

| 6 | f | 3 | 100 |

| 7 | g | 4 | 100 |

| 8 | h | 4 | 100 |

+------+------+-------+-------+

8 rows in set (0.00 sec)

[root@localhost ~]# mysql -uroot -p123456 -S /data/3306/soket/mysql.sock < /root/execSQL.sql

mysql: [Warning] Using a password on the command line interface can be insecure.

mysql> select * from testdb1.student;

+------+------+-------+-------+

+------+------+-------+-------+

| 1 | a | 1 | 45 |

| 2 | b | 1 | 46 |

| 3 | c | 2 | 89 |

| 4 | d | 2 | 90 |

| 5 | e | 3 | 67 |

| 6 | f | 3 | 87 |

| 7 | g | 4 | 77 |

| 8 | h | 4 | 91 |

+------+------+-------+-------+

8 rows in set (0.00 sec)

mysql誤修改全表記錄，使用binlog日誌找回資料

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