Alter database backup controfile to trace...

Question

When you run controlfile to trace, it creates following command within trc file
STARTUP NOMOUNT
CREATE CONTROLFILE REUSE DATABASE "ABC" RESETLOGS NOARCHIVELOG
MAXLOGFILES 16
MAXLOGMEMBERS 3
MAXDATAFILES 100
MAXINSTANCES 8
MAXLOGHISTORY 292
LOGFILE
GROUP 1 '/u01/app/oracle/oradata/abc/redo01.log' SIZE 50M,
GROUP 2 '/u01/app/oracle/oradata/abc/redo02.log' SIZE 50M,
GROUP 3 '/u01/app/oracle/oradata/abc/redo03.log' SIZE 50M
-- STANDBY LOGFILE
DATAFILE
'/u01/app/oracle/oradata/abc/system01.dbf',
'/u01/app/oracle/oradata/abc/undotbs01.dbf',
'/u01/app/oracle/oradata/abc/sysaux01.dbf',
'/u01/app/oracle/oradata/abc/users01.dbf',
'/u01/app/oracle/oradata/abc/user_test.dbf'
CHARACTER SET WE8ISO8859P1 ;
My question is: when you want to use this create controlfile command, how does the database get tablespaces names (eg. system, undo, sysaux... user_test in this cas) automatically. However The Tablespaces names are not specified within the create controlfile comand

Answer 1

I don't have a 9i environment. What do you get when you query
SELECT * FROM V$CONTROLFILE_RECORD_SECTIONFor example, this is what I see in my 10.2.0.3 database :
SQL> select * from v$controlfile_record_section where type = 'TABLESPACE';
TYPE                         RECORD_SIZE RECORDS_TOTAL RECORDS_USED FIRST_INDEX
LAST_INDEX LAST_RECID
TABLESPACE                            68           100            8           0
         0        108
SQL>When you issue RECOVER DATABASE commands, the Rollfoward from Redo
is by datafiles, not by tablespaces.
It is only when you OPEN the database that Oracle matches the Tablespace names.
Surely, you do understand that Tablespace names ARE in the Data Dictionary
and so are DataFile names and that Tablespace IDs are the join between the two ?
Message was edited by:
Hemant K Chitale