Can feature FLASHBACK DATABASE undo the loss of control of file/ORL?

DB version: 11.2.0.4

Platform: Oracle Linux 6.4

I personally have not tested the FLASHBACK DATABASE feature. I came across examples of logical errors such as truncate Table being overturned on FLASHBACK DATABASE.

I guess that FLASHBACK DATABASE feature may undo the loss of the data files. But will be a loss of control or the Group of newspapers online file again defeated using FLASHBACK DATABASE?

Hello

"I guess that feature FLASHBACK DATABASE can cancel the data files loss." Do not assume, check it out

Flashback database cannot cancel the loss of data files, control files and redo log files.

Flashback Database limitations

Because Flashback Database works by undoing changes to data files that exist at the present time when you run the command, it has the following limitations:

  • Flashback Database can only undo changes in an Oracle database data file. It cannot be used to fix the failings of the media, or recover the accidental deletion of data files.
  • You cannot use Flashback Database to cancel a file of data reduction operation. However, you can disconnect the wizened file, flash back, the rest of the database, and then later restore and restore the shriveled data file.
  • You cannot use Flashback Database only to retrieve a data file. If you Flash back, a database at a time when a data file exist in the database, that the entry of data file is added to the control file. You can only recover the database using RMAN to fully restore and recover the data file.
  • If the database control file is restored from backup or re-created, all the accumulated flashback journal information is ignored. You cannot use FLASHBACK DATABASE to get back to a point in time before the restoration or re-creation of a control file.
  • When you use Flashback Database with a time of target during a NOLOGGING operation was underway, corruption block is likely in database objects and files of data that is affected by the NOLOGGING operation. For example, if you perform a direct path INSERT operation in NOLOGGING mode and it runs from 09:00 to 09:15 April 3, 2005, and then use you Flashback Database to return to the target time 09:07 on this date, the objects and data files updated by the direct path INSERT have finished block operation Flashback Database corruption. If possible, avoid using Flashback Database with a time or SCN coinciding with a NOLOGGING operation. Also, perform a full or incremental backup of the immediately affected data files backup after each NOLOGGING operation to ensure recovery of points in time after the operation. If you plan to use Flashback Database to return to a point in time in the course of an operation, for example a direct path INSERT , consider performing the operation in LOGGING mode.

See: https://docs.oracle.com/cd/E11882_01/backup.112/e10642/flashdb.htm#BRADV286

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