Migrating from Oracle 8i to Oracle 10g is a big step. I do not have information about your environment, what the scripts do, etc., but I would expect that there will be some impact to your scripts with this migration. To mitigate this risk, I would hope that part of your migration plan is to test this process thoroughly in a non-production environment prior to migrating the database. Only by testing your scripts will you know with certainty what the impact of this migration will be and what needs to be done to ensure that the scripts function properly when the migration occurs in production.
The Oracle 10g Release 2 (10.2) Pro*C/C++ Programmer's Guide has a section titled "What's New in Pro*C/C++?" This might help identify scripts where you may encounter issues after the migration. As well, the Oracle Database 10g Release 2 (10.2) New Features Guide may also be helpful.
Finally, the Oracle Database 10g Release 2 (10.2) Upgrade Guide specifically addresses the different areas of testing that are crucial to a database upgrade.
Dig Deeper on Oracle database installation, upgrades and patches
Related Q&A from Maria Anderson
Can I use /var/opt/oracle/oratab to specify listener information? Continue Reading
We would like to migrate our database from Oracle 8.1.7 to Oracle 10g. We would like to know the impact for our application developed using Delphi ... Continue Reading
I have been trying to install Oracle 8.1.7 on SUSE Linux 9.0 and got the error: "Error in invoking target install of makefile /opt/oracle/...../*.mk." Continue Reading