We are very new users of the Postgresql databases!
We have noticed that there is a separate Postgres installation files for different version of the same O/S such as Redhat Linux (one Postgres install file for RHEL 6, one Postgres intall file for RHEL 7, one Postgres install file for RHEL 8, etc.)
Question: will Postgres databases (such as Postgres12 originally installed on a RHEL 6 server) continue to function properly after the server get O/S upgrade to RHEL 7??