MySQL rollback when auto_commit is on

Question

by mistake I fired an update query and all the records in the table in dat field got updated and also cannot rollback as auto_commit is on.

Is there any other way to retrieve the records?

Answer 1

I don't think you can rollback a query/transaction once it's been commited (and, here, it has) : the old data has been replaced by the new one, and has disappeared.

As possible solutions :

• If possible, depending on the update you did, there might be a way to revert that update ?
• Else, I hope you have frequent backups, and know how to restore them (to a temporary database, if necessary, to extract the informations you need, and re-import it into your production database "by had") ...

Answer 2

You can get the records but they are in the state of the last update. Rollback does not work, cause the transaction is closed already. (auto_commit on).

Answer 3

如果启用了二进制日志记录 ，则可以从备份还原数据库，然后从二进制日志中提取备份时间和错误查询之间的所有更改，然后将其重新应用于数据库。