Re: Non-unique values problem after 'add column'

dima.kagan@gmail.com writes:
> I've encountered a very strange problem with Postgresql 7.3.

7.3.what?

FWIW, I cannot replicate your problem using 7.3.20.  It doesn't sound
like any bug I can remember, but certainly there have been a lot of
bugs fixed over the past five years.

            regards, tom lane