安裝：
環境要求：
1、binlog格式必須爲row，且binlog_row_image=full
2、僅支持5.6與5.7
3、只能回滾DML（增、刪、改）
安裝：
unzip MyFlash-master.zip
mv MyFlash-master /usr/local/MyFlash/
gcc -w pkg-config --cflags --libs glib-2.0 source/binlogParseGlib.c -o binary/flashback
閃回：
update，情景描述，程序1誤將xtr庫下面的t2表 12,11 更改後0了,這是一個錯誤的操作;而後面的程序2將13、14更改0了，這是一個正確的操作，需要閃回程序1的誤操作。
模似上述場景：
原表：
mysql> select * from xtr.t2;
+------+
| id |
+------+
| 12 |
| 11 |
| 4 |
| 3 |
| 13 |
| 14 |
+------+
6 rows in set (0.00 sec)
update操作：
update xtr.t2 set id = 0 where id = 12;
update xtr.t2 set id = 0 where id = 11;
update xtr.t2 set id = 0 where id = 13;
update xtr.t2 set id = 0 where id = 14;
DBA接到開發的報警後：
1、flush logs;
需要閃回的動作所在的二進制文件，這個文件必須是穩定的，需要flush logs;
2、記錄當前的binlog文件
3、解析binlog
mysqlbinlog -vv bin.000038|less
at 838
#180326 21:41:59 server id 11 end_log_pos 882 CRC32 0x304d887b Table_map: xtr.t2 mapped to number 268 #這個position開始進入xtr.t2庫
at 882
#180326 21:41:59 server id 11 end_log_pos 928 CRC32 0x8fac8e57 Update_rows: table id 268 flags: STMT_END_F
BINLOG '
twa5WhMLAAAALAAAAHIDAAAAAAwBAAAAAAEAA3h0cgACdDIAAQMAAXuITTA=
twa5Wh8LAAAALgAAAKADAAAAAAwBAAAAAAEAAgAB///+CwAAAP4AAAAAV46sjw==
'/!/;
UPDATE xtr.t2 #更改的第一條語句
WHERE
@1=11 / INT meta=0 nullable=1 is_null=0 /
SET
@1=0 / INT meta=0 nullable=1 is_null=0 /
at 928
#180326 21:41:59 server id 11 end_log_pos 959 CRC32 0xca19e065 Xid = 230
COMMIT/!/;
at 959
#180326 21:42:04 server id 11 end_log_pos 1024 CRC32 0xe7e195c8 GTID last_committed=3 sequence_number=4
SET @@SESSION.GTID_NEXT= '148e1f5e-befd-11e7-ac58-08002738f0ad:207'/!/;
at 1024
#180326 21:42:04 server id 11 end_log_pos 1095 CRC32 0x0c3e3fdc Query thread_id=3 exec_time=0 error_code=0
SET TIMESTAMP=1522075324/!/;
BEGIN
/!/;
at 1095
#180326 21:42:04 server id 11 end_log_pos 1139 CRC32 0xd6cdd96b Table_map: xtr.t2 mapped to number 268
at 1139
#180326 21:42:04 server id 11 end_log_pos 1185 CRC32 0xbd63762d Update_rows: table id 268 flags: STMT_END_F
BINLOG '
vAa5WhMLAAAALAAAAHMEAAAAAAwBAAAAAAEAA3h0cgACdDIAAQMAAWvZzdY=
vAa5Wh8LAAAALgAAAKEEAAAAAAwBAAAAAAEAAgAB///+DAAAAP4AAAAALXZjvQ==
'/!/;
UPDATE xtr.t2 #更改的第二條語句
WHERE
@1=12 / INT meta=0 nullable=1 is_null=0 /
SET
@1=0 / INT meta=0 nullable=1 is_null=0 /
at 1185
#180326 21:42:04 server id 11 end_log_pos 1216 CRC32 0xb62d1a59 Xid = 231
COMMIT/!/;
at 1216 #兩個事務結束的position點位置
4、./flashback --sqlTypes='UPDATE' --binlogFileNames=/data/mysql/bin.000038 --start-position=838 --stop-position=1216 --outBinlogFileNameBase=update
反解析UPDATE操作，生成以update開頭的文件
生成的文件名：binlog_output_base.flashback
5、 mysqlbinlog binlog_output_base.flashback --skip-gtids |mysql -uroot -p'123' -S /tmp/mysql_3306.sock
導入數據庫
6、查詢數據庫
mysql> select * from xtr.t2;
+------+
| id |
+------+
| 12 |
| 11 |
| 4 |
| 3 |
| 0 |
| 0 |
+------+
6 rows in set (0.00 sec)
閃回完成
insert 場景閃回
原表：
mysql> select * from xtr.t2;
+------+
| id |
+------+
| 12 |
| 11 |
| 4 |
| 3 |
| 0 |
| 0 |
+------+
6 rows in set (0.00 sec)
插入數據
mysql> insert into xtr.t2 values(99);
Query OK, 1 row affected (0.00 sec)
mysql> insert into xtr.t2 values(88);
Query OK, 1 row affected (0.00 sec)
mysql> insert into xtr.t2 values(77);
Query OK, 1 row affected (0.00 sec)
mysql> select * from xtr.t2;
+------+
| id |
+------+
| 12 |
| 11 |
| 4 |
| 3 |
| 0 |
| 0 |
| 99 |
| 88 |
| 77 |
+------+
9 rows in set (0.00 sec)
mysql> delete from xtr.t2 where id = 0;
Query OK, 2 rows affected (0.03 sec)
mysql> select * from xtr.t2;
+------+
| id |
+------+
| 12 |
| 11 |
| 4 |
| 3 |
| 99 |
| 88 |
| 77 |
+------+
7 rows in set (0.00 sec)
現在需要閃回insert的操作，id=99,id=99,id=77的全部的閃回
mysql> show master logs;
+------------+-----------+
| Log_name | File_size |
+------------+-----------+ |
| bin.000036 | 1759 |
| bin.000037 | 749 |
| bin.000038 | 1771 |
| bin.000039 | 217 |
| bin.000040 | 2979 |
+------------+-----------+
17 rows in set (0.00 sec)
mysql> flush logs;
Query OK, 0 rows affected (0.08 sec)
./flashback --binlogFileNames=/data/mysql/bin.000040 --sqlTypes='INSERT' --start-position=1851 --stop-position=2462 --outBinlogFileNameBase=insert
mysqlbinlog insert.flashback --skip-gtids |mysql -uroot -p'123' -S /tmp/mysql_3306.sock
mysql> select * from xtr.t2;
+------+
| id |
+------+
| 12 |
| 11 |
| 4 |
| 3 |
+------+
4 rows in set (0.00 sec)
insert 閃回完成
可以用mysqlbinlog查看insert.flashback文件：
DELETE FROM xtr.t2
WHERE
@1=77 / INT meta=0 nullable=1 is_null=0 /
at 207
#180327 21:20:37 server id 11 end_log_pos 251 CRC32 0xb6c9ac45 Table_map: xtr.t2 mapped to number 268
at 251
#180327 21:20:37 server id 11 end_log_pos 291 CRC32 0x3efac7b3 Delete_rows: table id 268 flags: STMT_END_F
BINLOG '
NVO6WhMLAAAALAAAAPsAAAAAAAwBAAAAAAEAA3h0cgACdDIAAQMAAUWsybY=
NVO6WiALAAAAKAAAACMBAAAAAAwBAAAAAAEAAgAB//5YAAAAs8f6Pg==
'/!/;
DELETE FROM xtr.t2
WHERE
@1=88 / INT meta=0 nullable=1 is_null=0 /
at 291
#180327 21:20:34 server id 11 end_log_pos 335 CRC32 0xe10122fd Table_map: xtr.t2 mapped to number 268
at 335
#180327 21:20:34 server id 11 end_log_pos 375 CRC32 0x9943c01c Delete_rows: table id 268 flags: STMT_END_F
BINLOG '
MlO6WhMLAAAALAAAAE8BAAAAAAwBAAAAAAEAA3h0cgACdDIAAQMAAf0iAeE=
MlO6WiALAAAAKAAAAHcBAAAAAAwBAAAAAAEAAgAB//5jAAAAHMBDmQ==
'/!/;
DELETE FROM xtr.t2
WHERE
@1=99 / INT meta=0 nullable=1 is_null=0 /
SET @@SESSION.GTID_NEXT= 'AUTOMATIC' / added by mysqlbinlog / /!/;
DELIMITER ;
End of log file
/!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE/;
/!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=0/;
生成還是binlog文件，把二進制文件一行一行的讀出來，反向解析了
安裝報錯：
[root@mysql MyFlash]# gcc -w pkg-config --cflags --libs glib-2.0 source/binlogParseGlib.c -o binary/flashback
Package glib-2.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `glib-2.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'glib-2.0' found
解決：
yum -y install glib2-devel
導入報錯
[root@mysql binary]# mysqlbinlog binlog_output_base.flashback |mysql -uroot -p'123' -S /tmp/mysql_3306.sock
mysql: [Warning] Using a password on the command line interface can be insecure.
ERROR 1782 (HY000) at line 17: @@SESSION.GTID_NEXT cannot be set to ANONYMOUS when @@GLOBAL.GTID_MODE = ON.
根據官方建議加入--skip-gtids
[root@mysql binary]# mysqlbinlog binlog_output_base.flashback --skip-gtids |mysql -uroot -p'123' -S /tmp/mysql_3306.sock
mysql: [Warning] Using a password on the command line interface can be insecure.
ERROR 1032 (HY000) at line 36: Can't find record in 't2' t2是我需要回滾的表
但加上這個參數還是會報錯，但在數據庫裏查詢此時數據已經回滾進去了,第二天在測試就沒有這個問題了？
問題：
這是因爲找錯了position點的位置