How to fix the Oracle error ORA-38879: Cannot flashback data file string; may not be able to undo all changes.?

In this post, you’ll learn more about the Oracle ErrorORA-38879: Cannot flashback data file string; may not be able to undo all changes. with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-38879: Cannot flashback data file string; may not be able to undo all changes.

Reason for the Error ORA-38879: Cannot flashback data file string; may not be able to undo all changes.

A data file was plugged in when there was a guaranteed restore point, but Flashback Database was not enabled. It is possible that some changes to the data file, after it was converted, were not logged to the Flashback Database logs.

How to fix the Error ORA-38879: Cannot flashback data file string; may not be able to undo all changes. ?

You can fix this error in Oracle by following the below steps

If the FLASHBACK DATABASE command was meant to rewind the database to a time before the file was plugged in, take the data file offline and retry the command. If the FLASHBACK DATABASE command was meant to rewind the database to a time after the file was plugged in, restore the original version of the plugged in file and retry the command.