On Fri, Jul 29, 2022 at 11:35:36PM -0400, Tom Lane wrote:
> Hm. I considered reading PG_VERSION instead, or postmaster.pid.
> PG_VERSION would be a very boring test case, but it should certainly
> be present in $PGDATA.
PG_VERSION would be simpler. Looking at postmaster.pid would require
a lookup at external_pid_file, and as it is not set by default you
would need to add some extra logic in the tests where
external_pid_file = NULL <=> PGDATA/postmaster.pid.
--
Michael