Re: pg_upgrade

Tomasz Szypowski <tomasz.szypowski@gmail.com> writes:
> As far as I remember pg_upgrade is from 11.2 rest is from 9.5.

If you're not certain, run each program with the --version switch
to find out.  But pg_upgrade should be refusing to use pg_dump
et al that aren't from its own major version.

            regards, tom lane