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Don Burleson Blog 







dbnewid (nid) tips 

Oracle Database Tips by Donald BurlesonFebruary 13, 2015

Question:  I want to rename my instance and I want to know hot to use the dbnewid procedure.

Answer:  Here is a sample session of using the dbnewid (nid) command utility:

The dbname of the Oracle instance can be changed using the nid utility. After the rename, the database will need to be bounced (shutdown and mounted again):

nid target=sys/change_on_install dbname=lappsdb setname=yes

The following output will appear. The command will prompt for input on the following question:

"Change database name of database <old dbname> to <new dbname>? (Y/[N]) => "
Type Y and press enter.

----------------Output of nid command---------------
DBNEWID: Release - Production
Copyright (c) 1995, 2002, Oracle Corporation. All rights reserved.


For Oracle9i and beyond, Oracle author Dr. Tim Hall has this procedure to rename an Oracle database using the new dbnewid (also called nid, for new ID) utility:

  • STEP 1: Backup the database.
  • STEP 2: Mount the database after a clean shutdown:
  • STEP 3: Invoke the DBNEWID utility (nid) specifying the new DBNAME from the command line using a user with SYSDBA privilege:
    nid TARGET=sys/password@TSH1 DBNAME=TSH2
    Assuming the validation is successful the utility prompts for confirmation before performing the actions. Typical output may look something like:
    C:\oracle\920\bin>nid TARGET=sys/password@TSH1 DBNAME=TSH2
    DBNEWID: Release - Production
    Copyright (c) 1995, 2002, Oracle Corporation.  All rights reserved.
    Connected to database TSH1 (DBID=1024166118)
    Control Files in database:
    Change database ID and database name TSH1 to TSH2? (Y/[N]) => Y
    Proceeding with operation
    Changing database ID from 1024166118 to 1317278975
    Changing database name from TSH1 to TSH2
        Control File C:\ORACLE\ORADATA\TSH1\CONTROL01.CTL - modified
        Control File C:\ORACLE\ORADATA\TSH1\CONTROL02.CTL - modified
        Control File C:\ORACLE\ORADATA\TSH1\CONTROL03.CTL - modified
        Datafile C:\ORACLE\ORADATA\TSH1\SYSTEM01.DBF - dbid changed, wrote new name
        Datafile C:\ORACLE\ORADATA\TSH1\UNDOTBS01.DBF - dbid changed, wrote new name
        Datafile C:\ORACLE\ORADATA\TSH1\CWMLITE01.DBF - dbid changed, wrote new name
        Control File C:\ORACLE\ORADATA\TSH1\CONTROL01.CTL - dbid changed, wrote new name
        Control File C:\ORACLE\ORADATA\TSH1\CONTROL02.CTL - dbid changed, wrote new name
        Control File C:\ORACLE\ORADATA\TSH1\CONTROL03.CTL - dbid changed, wrote new name
    Database name changed to TSH2.
    Modify parameter file and generate a new password file before restarting.
    Database ID for database TSH2 changed to 1317278975.
    All previous backups and archived redo logs for this database are unusable.
    Shut down database and open with RESETLOGS option.
    Succesfully changed database name and ID.
    DBNEWID - Completed succesfully.
  • STEP 4: Shutdown the database:
  • STEP 5: Modify the DB_NAME parameter in the initialization parameter file. The startup will result in an error but proceed anyway.
  • STEP 6: Create a new password file:
    orapwd file=c:\oracle\920\database\pwdTSH2.ora password=password entries=10
  • STEP 7: Rename the SPFILE to match the new DBNAME.
  • STEP 8: If you are using Windows you must recreate the service so the correct name and parameter file are used:
    oradim -delete -sid TSH1
    oradim -new -sid TSH2 -intpwd password -startmode a -pfile c:\oracle\920\database\spfileTSH2.ora
    If you are using UNIX/Linux simply reset the ORACLE_SID environment variable:
  • STEP 9: Alter the listener.ora and tnsnames.ora setting to match the new database name and restart the listener:
    lsnrctl reload
  • STEP 10: Open the database with RESETLOGS:
  • STEP 11: Backup the database.

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Note: This Oracle documentation was created as a support and Oracle training reference for use by our DBA performance tuning consulting professionals.  Feel free to ask questions on our Oracle forum.

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