Upgrading the Recovery Catalog Database from 9i to 10g

The Rman Catalog Upgarde is same as normal Database upgrade and can be accomplished in two ways.

a) Updrade the Database from 9i to 10g
- Connect to rman catalog datase.
- Issue the rman command "upgrade catalog" as this upgrades the catalog database from 09.02.00 to 10.02.00.03

b) Fresh Install of 10g Database / Use the existing 10g Database.
- Create the rman user and grant create session, recovery_catalog_owner, create type to rman user.
- Export import of Rman Schema
- Issue the rman Command :upgrade catalog"


Note:- You will encounter the below warning or error message , if you have not upgraded the catalog after the database version upgrade.
connected to target database: DSSPROD (DBID=1021024992)
connected to recovery catalog database
PL/SQL package RMAN.DBMS_RCVCAT version 09.02.00 in RCVCAT database is too old

Solution
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1. Connect to recovery catalog database as rman user.
2. issue the rman command " upgrade catalog" twice