Kris Jurka <jurka@ejurka.com> writes:
> When you restructured the unique index location and validation for
> foreign key constraints around 9/22 you added the restriction that the
> supporting unique index may not be functional. I believe that this
> restriction is not necessary.
Hmm ... I'm not convinced. What about functions that return NULL for
some inputs? A unique index will not reject multiple NULL entries.
regards, tom lane