Merlin Moncure <mmoncure@xxxxxxxxx> writes: > On Sat, Jun 6, 2009 at 2:07 PM, Tom Lane<tgl@xxxxxxxxxxxxx> wrote: >> If you're willing to use a trigger, just insert the one allowed row >> and then install a trigger that throws error for any insert or delete >> attempt ... > what if you need to delete then insert? :-) Hmm ... I supposed the requirement was "always exactly one row". If it's "always zero or one row", then you're right. regards, tom lane -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
