If the DBNEWID utility succeeds in its validation stage but detects an error while performing the requested change, then the utility stops and leaves the database in the middle of the change. In this case, you cannot open the database until the DBNEWID operation is either completed or reverted. DBNEWID displays messages indicating the status of the operation.
Before continuing or reverting, fix the underlying cause of the error. Sometimes the only solution is to restore the whole database from a recent backup and perform recovery to the point in time before DBNEWID was started. This underscores the importance of having a recent backup available before running DBNEWID.
If you choose to continue with the change, then re-execute your original command. The DBNEWID utility resumes and attempts to continue the change until all data files and control files have the new value or values. At this point, the database is shut down. You should mount it before opening it with the RESETLOGS option.
If you choose to revert a DBNEWID operation, and if the reversion succeeds, then DBNEWID reverts all performed changes and leaves the database in a mounted state.
If DBNEWID is run against a release 10.1 or later Oracle database, then a summary of the operation is written to the alert file. For example, for a change of database name and database ID, you might see something similar to the following:
*** DBNEWID utility started *** DBID will be changed from 86997811 to new DBID of 1250452230 for database PROD DBNAME will be changed from PROD to new DBNAME of TEST_DB Starting datafile conversion Setting recovery target incarnation to 1 Datafile conversion complete Database name changed to TEST_DB. Modify parameter file and generate a new password file before restarting. Database ID for database TEST_DB changed to 1250452230. All previous backups and archived redo logs for this database are unusable. Database has been shutdown, open with RESETLOGS option. Successfully changed database name and ID. *** DBNEWID utility finished successfully ***
For a change of just the database name, the alert file might show something similar to the following:
*** DBNEWID utility started *** DBNAME will be changed from PROD to new DBNAME of TEST_DB Starting datafile conversion Datafile conversion complete Database name changed to TEST_DB. Modify parameter file and generate a new password file before restarting. Successfully changed database name. *** DBNEWID utility finished successfully *** In case of failure during DBNEWID the alert will also log the failure: *** DBNEWID utility started *** DBID will be changed from 86997811 to new DBID of 86966847 for database AV3 Change of database ID failed. Must finish change or REVERT changes before attempting any database operation. *** DBNEWID utility finished with errors ***