Marko Tiikkaja <marko.tiikk...@cs.helsinki.fi> writes: > On 2010-05-30 06:55 +0300, Robert Haas wrote: >> I've often wished for the ability to constrain a tale to hold just one >> row, so I don't find that use case implausible at all.
> As I pointed out in > http://archives.postgresql.org/pgsql-hackers/2010-05/msg01177.php , you > can already do that. Yes. This is NOT about constraining a table to hold only one row. It's about requiring all its rows to hold the same value (in some column(s)), without predetermining exactly which value that will be. I think the use-case for that is really extremely narrow. regards, tom lane -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers