闪回是一种允许将实例，数据库或表回滚到旧快照的功能。DML-only flashback was introduced in MariaDB 10.2.4
目前仅在DML语句（INSERT，DELETE，UPDATE）上支持闪回。即将推出的MariaDB版本将通过将当前表复制或移动到保留和隐藏数据库，
然后在使用闪回时复制或移回来添加对DDL语句（DROP，TRUNCATE，ALTER等）的闪回支持。
使用对完整镜像格式二进制日志（binlog_row_image=FULL）的现有支持，在MariaDB Server中实现闪回，因此它支持所有引擎。
闪回的实际工作是由做mysqlbinlog用--flashback。这会导致事件被转换：INSERT到DELETE，DELETE到INSERT，对于UPDATEs，交换前后镜像。
执行mysqlbinlog时--flashback，闪回事件将存储在内存中。您应该确保您的服务器有足够的内存用于此功能。
新参数：
mysqlbinlog新的选项--flashback or -B能够让它工作在闪回模式
mysqld有新的选项--flashback启用binary log并且设置binlog_format=ROW
示例：
mysqlbinlog /var/lib/mysql/mysql-bin.000001 -vv -d test -T mytable --start-datetime="2013-03-27 14:54:00" > review.sql
mysqlbinlog /var/lib/mysql/mysql-bin.000001 -vv -d test -T mytable --start-datetime="2013-03-27 14:54:00" --flashback > flashback.sql
其它选项还可以是--start-position
常见的一个用flashback场景是：
A common use case for Flashback is the following scenario:
You have one master and two slaves, one started with --flashback (i.e. with binary logging enabled, using binlog_format=ROW, and binlog_row_image=FULL).
Something goes wrong on the master (like a wrong update or delete) and you would like to revert to a state of the database (or just a table) at a certain point in time.
Remove the flashback-enabled slave from replication.
Invoke mysqlbinlog to find the exact log position of the first offending operation after the state you want to revert to.
Run mysqlbinlog --flashback --start-position=xyz | mysql to pipe the output of mysqlbinlog directly to the mysql client, or save the output to a file and then direct the file to the command-line client.
