Import schema from datafile

Question

Here is the situation: We are decommissioning an Oracle 9.2 database, but we need to move the contents of one of the schemas into a 10g database. Ordinarily, we'd use the legacy export and import tools to do this, but in this case we can't (due to the fact that the catexp.sql script hasn't been run, and nobody knows the SYS password to login as SYSDBA to run the script).
We can, however, migrate the datafiles to the new server. So this is my question: can we somehow add the new datafiles to the existing database and move the schema into the already existing tablespaces/datafiles? I have no idea how this would work, so any guidance would be appreciated.
Or, to simplify things, is it possible to run the catexp.sql script as SYSTEM? Perhaps any other way?

Answer 1

Though now that I read it again, it says "To use Export and Import, you must run the script catexp.sql or catalog.sql (which runs catexp.sql) after the database >has been created or migrated to Oracle Database 10g."If you have the current database is on oracle 9i and want to perform export(exp) and import(imp) into a 10g database,which already exists, You don't have to run catexp.sql. catexp.sql gets executed after the 10g database is created through catalog.sql. usually catexp is called by catalog.sql.
Execute
select * from role_role_privs; and if you see the below in both 9i and 10g, you're all set. Use exp to export from 9i database and use imp from 10g and import into 10g database.
ROLE                           GRANTED_ROLE                   ADM
IMP_FULL_DATABASE              SELECT_CATALOG_ROLE            NO
IMP_FULL_DATABASE              EXECUTE_CATALOG_ROLE           NO
EXP_FULL_DATABASE              EXECUTE_CATALOG_ROLE           NO
EXP_FULL_DATABASE              SELECT_CATALOG_ROLE            NO
So that means I only need to run catexp.sql after importing it into my 10g database? I think that line is causing me some confusion.Depends on the output of the above.
HTH
-Anantha