Can you trigger an automatic WHERE-clause on any statement on a table?

Hi all

We are currently in the process of migrating a previous single-user application to a multi-user application running on the web using Forms Server 6i on Oracle8i 8.1.6 on Windows NT. The multi-user application is supposed to be based on user rights specified in a user table, which contains information about, which modules of the application, the user is allowed to use.

The existing database schema will be changed to include a "user_id" tuple in each table, which contains user data. This tuple will reference the user table's primary key "user_id". This means, that either we have to change a lot of SQL statement throughout the program to include "WHERE <user data-table>.user_id = users.user_id" (the "users.user_id" is at login compared with "SELECT USER FROM DUAL", and if no rows returned, the user is denied application login).

Does anyone know, if it is possible to create a trigger or some other database mechanism, which you could use on the user data tables, which automatically appends the mentioned WHERE-clause, or do we have to re-code all the SQL statements in the application?

Any advice on this subject would be greatly appreciated!

Thanks in advance
Jacob

jacmads_at_hotmail.com Received on Sun Oct 08 2000 - 14:40:57 CDT