recursive views

I had some time during vacation to thing about postgresql. And here's the
feature I'd really like to see. This one would put us miles in front of all
others: recursive view definitions.

Just one short example:

There is that well-known parent relation: par (parent, child). The view anc
now should list all ancestors:

create view anc as
select parent as ancestor, child as person from par
union
select anc.ancestor as ancestor, par.child as person
from anc, par
where anc.person = par.parent;

What do you guys think of this idea? How much work would it be to implement
it?

Michael
--
Dr. Michael Meskes, Project-Manager | topsystem Systemhaus GmbH
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