Re: BUG #15891: Cannot alter columns and add constraints in one alter statement since 11.4 update

PG Bug reporting form <noreply@postgresql.org> writes:
> Since the update of my PostgreSQL server to 11.4 some of my automated
> migrations of a web app (Phoenix on Elixir) started to fail. I’ve narrowed
> it down to not being able to do the following:

Yeah, this is an embarrassing bug in the fix for bug #15835.
A fix is already committed,
https://git.postgresql.org/gitweb/?p=postgresql.git&a=commitdiff&h=afaf48afb
and it will be in the next minor releases.

            regards, tom lane