Create new oracle database with JAVA

Question

Hi!
I would appreciated it if you could help me to solve a problem that i have.
I am trying to create a new oracle database by a JAVA 1.4.2 application. I am using the scripts that Oracle 10.g supplies during the creation of a new database from the server (Generate Database Creation Scripts) with the appropriate changes, generated by a java application. Unfortunately, i am unable to connect with the database and the listener. Is there any other way to create a new database by java and how can i solve my current problem with the oracle scripts?
Thank you.

Answer 1

A) To create a new schema, you need to be connected as a user that has create schema privilege, or as tyhe user who is to own the schema (remembering that the user has appropriate create privs, as seen in the GRANT command in the SQL Reference manual). Not an issue at all, I think, if you coordinate this with your DBA. Discussed very well in the Administrator's manual.
B) Alternately, you could create a complete copy of the schema, including all desired objects (tables, views, etc.) in a separate database and simply export the user and schema. Then simply invoke the OS-based import command (imp) to load that entire thing into the target database.
C) To create a new database, there are 3 simple steps ...
1) create the appropriate initialization parameter file
the init{sid}.ora file should be placed in the $ORACLE_HOME/dbs or %ORACLE_HOME%\database directory. (I recommend you do not attempt to create the spfile.) Of critical interest will be setting the block size information, the control file parameters, and using the appropriate memory management parameters, based on the version of the software you will be using to create the database instance.
2) start an empty instance, pointing to the parameter file
This will be an OS specific call, and will require that you have the correct OS environment set up as well as access to the ORACLE_HOME which will provide the software that you will invoke. In *nix you will need to call the sqlplus command with sysdba provs and in Windows you will need to call oradim to initialize this as a service.
3) run the SQL create database command
You might want to use the dbca to create a template of the create database command, or look in the SQL Reference manual for the variations on the command. Of critical interest will be initializing the redo logs as well as the system, sysaux (if needed), temp and undo tablespaces after which you can set up the regular tablespaces, users and schemas. I highly recommend that you have redundant copies of the control files on separate drives.
You may want to review the online Concepts manual and the Adminstration Guide for some of the specifics to your needs, but I think I've covered the basics.
Remember that ideally you will only have one database instantiated on any given server as the memory and CPU overhead of each instance is significant.
Good luck.