Re: pg_upgrade if 'postgres' database is dropped

Bruce Momjian <bruce@momjian.us> writes:
> Stephen Frost wrote:
>> Yes, they would have removed it because they didn't want it.  As I
>> recall, part of the agreement to create an extra database by default was
>> that it could be removed if users didn't want it.  Turning around and
>> then saying "but things won't work if it's not there" isn't exactly
>> supporting users who decide to remove it.

> Well, you would have to remove it _after_ you did the pg_upgrade.

As far as the *target* cluster is concerned, I have no sympathy for
someone who messes with its contents before running pg_upgrade.
That's an RTFM matter: you're supposed to upgrade into a virgin
just-initdb'd cluster.

However, it would be nice if pg_upgrade supported transferring from a
*source* cluster that didn't have the postgres DB.

What about creating a new, single-purpose database in the source
cluster and then removing it again after we're done?
        regards, tom lane