Re: ALTER TABLE ADD COLUMN fast default

Andrew Gierth <andrew@tao11.riddles.org.uk> writes:
> This gitlab ticket refers to the same incident:
> https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/6047
> (which actually contains a new relevant fact that hadn't been mentioned
> in the IRC discussion, which is that the problem affected multiple
> tables, not just one.)

Hmm.  If you assume that the problem is either a corrupted index on
pg_attrdef, or some block(s) of pg_attrdef got zeroed out, then it
would be entirely unsurprising for multiple tables to be affected.

I've pushed the v2 patch to HEAD.  Not sure if we want to consider
back-patching.

            regards, tom lane