Re: Postgres 15 upgrades and template1 public schema

On Wed, Oct 19, 2022 at 19:59:52 -0400,
  Tom Lane <tgl@sss.pgh.pa.us> wrote:
>
>The release notes could probably use some tweaking here.  It looks to
>me like pg_dumpall (and hence pg_upgrade) will adjust the ownership and
>permissions of template1's public schema to match what was in the old
>installation, but it doesn't touch template0.  Hence, whether a
>"newly-created database in an existing cluster" has the old or new
>properties of the public schema will depend on whether you clone it
>from template1 or template0.  That definitely needs explained, and
>maybe we should recommend that DBAs consider manually changing
>what's in template1.

This answers my question about what is actually happening.

I think expanding the release notes section on this a bit could be 
helpful for other people.