No DIVIDE Operator

Hi!

Consider the following szenario:

Two Tables:

create table Person (
name text,
prename text,
street text,
town text
);

create table Officer (
name text,
prename text,
bureau text
);

So, every Officer is a Person. Now, I would like to get all persons
except for Officers.

If there would be a divide operator, I could write

select name, prename from Person divide select name, prename from
Officer;

without it, however, things get really complicated:

select name, prename from Person where prename not in ( select prename
from Officer where Officer.name = Person.name );

This is an easy example. However, I have to deal with about 10 tables in
a corresponding way.

Any better idea? Will there be a divide operator in PGSQL soon?

Thanks!

Regards

Joerg Fischer