Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> I believe, however, that applying this will invalidate the contents of
> any hash indexes on array types that anyone has built using 9.1beta1.
> Do we need to do something about that?
Like bumping catversion?
I would probably complain about that, except you already did it post-beta1:
http://git.postgresql.org/gitweb?p=postgresql.git;a=commitdiff;h=9bb6d9795253bb521f81c626fea49a704a369ca9
Possibly Bruce will feel like adding a check to pg_upgrade for the case.
I wouldn't bother myself though. It seems quite unlikely that anyone's
depending on the feature yet.
regards, tom lane