Re: Collation versioning

Re: Thomas Munro 2019-10-11 <CA+hUKGKDe98DFWKJoS7e4Z+Oamzc-1sZfpL3V3PPgi1uNvQ1tw@mail.gmail.com>
> While testing pg_upgrade scenarios I noticed that initdb-created
> collations' versions are not preserved, potentially losing track of
> information about corrupted indexes.  That's a preexisting condition,
> and probably well understood, but it made me realise that if we switch
> to per-database object (for example: per index) version tracking as
> mentioned up-thread, then we should probably preserve that information
> across pg_upgrade.

That would make much sense, yes. The whole problem is already complex
enough, if we add another "but if you use pg_upgrade, you still need
to do the tracking manually" footnote, users will be very confused.

Christoph