SQL-Functions in index ???????

Hi all,
please excuse my lack of knowledge in advance. I need to index my table using SQL-function (for example, NLS-upper). That's quite possible under SQL Base (example:

        create index on table_name (@upper(column_name));   Is it possible in Oracle 7.3?

Any help would great appreciated.
Best regards.

David.Gutman_at_hgc.de Received on Mon Dec 15 1997 - 00:00:00 CST