Re: pg_group_name_index corrupt?

>> Would a pg_upgrade fix this, or do I have to do a whole dump/reload?  

> pg_upgrade *should* work, but if I were you I'd make a backup dump
> first, just in case.  I don't trust pg_upgrade very much...

Oh, btw: pg_upgrade will *not* work to save and reload your group
definitions, because neither it nor pg_dumpall do anything at all with
pg_group!  For that matter, a full dumpall/reload won't preserve
groups either!

I griped about that a week or so ago, but no one seems to have picked up
on it.  Do you want to consider that a "must fix" problem as well?
I think it's a pretty minor fix, but considering how late we are in the
cycle...
        regards, tom lane