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Backup & Recovery

NID : change DB_NAME

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Change the database DB_NAME with NID

 

Whereras changing the DBID with nid has a non reversable impact on your backup and recovery possibilities, changing only the database DB_NAME has significantly less consequences since,

1. it does not invalidate previously taken backups

2. it does not invalidate previously generated archivelogs

3. it does not require opening the database with the resetlogs option.

 

Let us change the database db_name without changing the database dbid, nevertheless you shuld be aware of the impact as well.

 

SQL> shutdown immediate;
Database dismounted.
ORACLE instance shut down.
SQL> startup mount;
ORACLE instance started.

Total System Global Area 1073741824 bytes
Fixed Size                  2050856 bytes
Variable Size             247465176 bytes
Database Buffers          817889280 bytes
Redo Buffers                6336512 bytes
Database mounted.
SQL> exit

nid target=sys/secret_password dbname=COCONUT SETNAME=YES

DBNEWID: Release 10.2.0.3.0 - Production on Tue Mar 18 15:50:35 2008

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

Connected to database COCONUT (DBID=3976866604)

Connected to server version 10.2.0

Control Files in database:
    +DG1/COCONUT/controlfile/current.509.649687193
    +DG2/COCONUT/controlfile/current.645.649687201

Change database name of database COCONUT to COCONUT? (Y/N) => Y

Proceeding with operation
Changing database name from COCONUT to COCONUT
    Control File +DG1/COCONUT/controlfile/current.509.649687193 - modified
    Control File +DG2/COCONUT/controlfile/current.645.649687201 - modified
    Datafile +DG1/COCONUT/datafile/system.646.649688265 - wrote new name
    Datafile +DG1/COCONUT/datafile/undotbs1.647.649688265 - wrote new name
    Datafile +DG1/COCONUT/datafile/sysaux.648.649688267 - wrote new name
    Datafile +DG1/COCONUT/datafile/users.649.649688267 - wrote new name
    Datafile +DG1/COCONUT/datafile/ts_my_db_admin_code.658.649688267 - wrote new name
    Datafile +DG1/COCONUT/datafile/ts_my_db_logging_data_0208.674.649688267 - wrote new name
    Datafile +DG1/COCONUT/datafile/ts_my_db_logging_data_0308.656.649688267 - wrote new name
    Datafile +DG1/COCONUT/datafile/ts_my_db_logging_data_0408.675.649688269 - wrote new name
    Datafile +DG1/COCONUT/datafile/ts_my_db_logging_data_0508.518.649688277 - wrote new name
    Datafile +DG1/COCONUT/datafile/ts_my_db_logging_data_0608.511.649688297 - wrote new name
    Datafile +DG1/COCONUT/datafile/ts_my_db_logging_indx.512.649688299 - wrote new name
    Datafile +DG1/COCONUT/tempfile/temp.643.649688777 - wrote new name
    Datafile +DG1/COCONUT/tempfile/temp01.642.649688777 - wrote new name
    Datafile +DG1/COCONUT/tempfile/temp02.641.649688779 - wrote new name
    Control File +DG1/COCONUT/controlfile/current.509.649687193 - wrote new name
    Control File +DG1/COCONUT/controlfile/current.645.649687201 - wrote new name
    Instance shut down

Database name changed to COCONUT.
Modify parameter file and generate a new password file before restarting.

Succesfully changed database name.
DBNEWID - Completed succesfully.

cd $ORACLE_HOME/dbs
oracle@myhost:/opt/oracle/ORA_HOME/dbs $ cp spfileMYDB.ora spfileCOCONUT.ora
oracle@myhost:/opt/oracle/ORA_HOME/dbs $ cp orapwMYDB

orapwCOCONUT
oracle@myhost:/opt/oracle/ORA_HOME/dbs $ export ORACLE_SID=COCONUT
oracle@myhost:/opt/oracle/ORA_HOME/dbs $ sqlplus / as sysdba

SQL*Plus: Release 10.2.0.3.0 - Production on Tue Mar 18 15:53:39 2008

Copyright (c) 1982, 2006, Oracle.  All Rights Reserved.

Connected to an idle instance.

SQL> startup nomount;
ORACLE instance started.

Total System Global Area 1073741824 bytes
Fixed Size                  2050856 bytes
Variable Size             239076568 bytes
Database Buffers          826277888 bytes
Redo Buffers                6336512 bytes
SQL> alter system set db_name=coconut scope=spfile;

System altered.

SQL> alter system set db_unique_name=coconut scope=spfile;

System altered.

SQL> shutdown immediate;
ORA-01507: database not mounted


ORACLE instance shut down.
SQL> startup;
ORACLE instance started.

Total System Global Area 1073741824 bytes
Fixed Size                  2050856 bytes
Variable Size             239076568 bytes
Database Buffers          826277888 bytes
Redo Buffers                6336512 bytes
Database mounted.
Database opened.

SQL> select name from v$database;

NAME


COCONUT