Re: Collation versioning

On Tue, Nov 26, 2019 at 3:44 PM Thomas Munro <thomas.munro@gmail.com> wrote:
> I suppose another reason to use such a switch would be if there is a
> change in the versioning scheme; for example, as of today in master we
> are using the glibc version, but a future glibc release might offer an
> interface to query the CLDR version it's using, and then a future
> release of PostgreSQL might get support for that, so the strings would
> change between major version of PostgreSQL but you might want to be
> able to tell pg_upgrade that your indexes are good.

Yeah, I like #3 too. If we're going to the trouble to build all of
this mechanism, it seems worth it to build the additional machinery to
be precise about the difference between "looks like a problem" and "we
don't know".

-- 
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company