Need of catalog and catproc

Question

Hi is it compulsory that we will run catalog.sql or catproc.sql scripts after installing database?or is there any procedure that we can run automatically?
please explain me for 10g version also (if there is any difference in 10g)
thanks in advance.

Answer 1

catalog.sql created all the DBA_, ALL_ and USER_ views that make up the data dictionary. Without them, you'd be stuffed. You wouldn't be able to manage a thing. So, whilst the database is mostly functional without running the script, it's completely unmanageable, which amounts to being totally non-functional, really.
Catproc.sql creates all the packages and procedures that the database needs to be fully functional. Schedule a job with DBMS_JOB or DBMS_SCHEDULER? Well, how do you think DBMS_JOB or DBMS_SCHEDULER got there in the first place? Catproc.sql is how, along with a bazillion other DBMS_this, that or the other. So no, without catproc, you wouldn't have a useful or usable database.
This hasn't changed one bit in 10g. It's been like this for versions going back to at least version 7, and quite possibly long before that.
You don't need to run them yourself, however, if you use the Database Configuration Assistant which has been Oracle's preferred way of creating databases since about version 8.0. The DBCA runs both scripts (and a few others) for you. The progress display reads something like 'Creating Data Dictionary Views' when it's doing it. You can check this for yourself by asking DBCA not to actually create a database but merely to create the scripts which it would normally use to create a database. Those scripts are merely text files, so you can open them up and have a look... and you'll see catalog and catproc both make an appearance there.