Hi all, I pushed my patch to http://bazaar.launchpad.net/~maria-captains/maria/10.0-flashback/revision/3510
Compare with the pre-patch, I modified the exchange_update_rows() function, it will revert the rows in one update event, too. On Wed, Mar 27, 2013 at 3:38 PM, Lixun Peng <pengli...@gmail.com> wrote: > Hi Monty, > > I patched my flashback feature to 10.0-base, and this is the diff > file, please help me to review it. > > How to use this feature? > I added several new arguments for mysqlbinlog: > --flashback (-B), it will let mysqlbinlog working on FLASHBACK mode. > --table (-T), it likes -d, but this argument is for table. > --review, it will le mysqlbinlog print the SQL for reviewing. > Reviewing feature will create a new "review" table to record the data > that will be changed by FLASHBACK feature. If you aren't special the > --review-dbname/tablename, "review" table will created on current DB, > and the table name will be "__"+original_table_name. And for getting > the original table struct, mysqlbinlog need to connect mysql, so > --user/--host/--password is needed if necessary. > --review-dbname, the DB that you want to store the review table. > --review-tablename the TABLE that you want to store the changed data. > Only if you set -T, this argument is useful. > > For example: > I have a table "t" in database "test", > CREATE TABLE `t` ( > `id` int(10) unsigned NOT NULL AUTO_INCREMENT, > `info` varchar(32) DEFAULT NULL, > PRIMARY KEY (`id`) > ) ENGINE=InnoDB AUTO_INCREMENT=9043880 DEFAULT CHARSET=utf8; > > And I done this operation, > root@localhost : (none) 14:52:50> reset master; > root@localhost : (none) 14:53:02> use test > root@localhost : test 14:53:08> delete from t limit 10; > root@localhost : test 14:53:25> insert into t (info) select "你好"; > root@localhost : test 14:54:01> update t set info ='hello你好' limit 5; > > We can compare the output with --flashback or not. > #client/mysqlbinlog /data/mysqldata_10.0/binlog/mysql-bin.000001 -vv > -d test -T t --start-datetime="2013-03-27 14:54:00" > /tmp/1.sql > #client/mysqlbinlog /data/mysqldata_10.0/binlog/mysql-bin.000001 -vv > -uroot -d test -T t --start-datetime="2013-03-27 14:54:00" -B --review > > /tmp/2.sql > > How to implement Flashback: > 1. mysqlbinlog tool can parse the binlog files and print them, so we > can use the most of code in mysqlbinlog. > 2. Changing the event type (INSERT -> DELETE, DELETE -> INSERT) > 3. Exchanging the SET/WHERE part in UPDATE (UPDATE table SET x=1 WHERE > y=2 -> UPDATE table SET y=2 WHERE x=1) > 4. Invert the event output, from end to beginning (binlog: e1,e2,e3... > -> flashback_log: en...e3,e2,e1) > > Then, importing the flashback output can flashback database/table to > the special time. > But binlog_format should be ROW. > > > Thanks, > Lixun > > -- > Senior MySQL Developer @ Taobao.com > > Mobile Phone: +86 18658156856 (Hangzhou) > Gtalk: penglixun(at)gmail.com > Twitter: http://www.twitter.com/plinux > Blog: http://www.penglixun.com > -- Senior MySQL Developer @ Taobao.com Mobile Phone: +86 18658156856 (Hangzhou) Gtalk: penglixun(at)gmail.com Twitter: http://www.twitter.com/plinux Blog: http://www.penglixun.com
_______________________________________________ Mailing list: https://launchpad.net/~maria-developers Post to : maria-developers@lists.launchpad.net Unsubscribe : https://launchpad.net/~maria-developers More help : https://help.launchpad.net/ListHelp
