Edmund Dengler <edmundd@eSentire.com> writes:
> What I want is an '=' that compares nulls as equal (rather than as
> not-equal, which is the normal case).
IS DISTINCT FROM may help you here. It's a not-equals operator rather
than an equals operator, but it does what you want.
(Unless what you wanted included being able to use an index...)
regards, tom lane