partial index

the table of clients per intitutions looks like that

nu_institution
nu_client
client_name
....

I need a partial index of (upper(client_name)) per nu_institution

Reading the information about index declaration, I haven't found the way to
write the predicate to filter per nu_institution field name.

Thanks for help
Enediel
Linux user 300141

Happy who can penetrate the secret causes of the things
�Use Linux!