On Tue, Jan 10, 2012 at 1:44 PM, David Johnston <polobo@xxxxxxxxx> wrote: > Sorry for not answering the main question but you really need to avoid > phrases like "near future". That said, new features are only released > during major releases and so at best you would have to wait for 9.2 which is > probably 9+ months out since 9.1 was just recently released. The better > question is whether 9.2 is likely to have what you need or whether it has a > chance to be during 9.3 (1.5+ years out). More generically the question is > whether anyone is currently working on the feature. yeah -- I've seen a bit of interest in this feature, but AFAIK nobody's working on it, and no plausible design has been submitted (which is a giant red flag in terms of 9.2 acceptance). fair warning: this is one of those items that sounds neat but is a lot more complicated than it looks. in the meantime, just do the workaround I do: make an immutable function that takes your type as input, and manually apply the constraint in various places like (like as a table constraint). merlin -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general