> https://fedoraproject.org/wiki/Changes/PostgreSQL_13

On Tuesday, January 12, 2021 9:57:02 PM CET Ben Cotton wrote:
> As postgresql packages are built against the separated libpq package,
> an incompatibility between major versions can occur with new minor
> upstream releases. For example, when building postgresql version 12.4
> against libpq version 13.1.

Last time when I checked with upstream, this shouldn't actually happen.
We observed a few small problems from what I remember, but those were
immediately fixed by follow-up patch upstream (to fix compatibility).

Also, Debian used to _run_ ¹ all the PostgreSQL server variants against
one, the most up2date major version of libpq library (even though all
libpq variants are provided at the same time).

Pavel

¹ The approach in Fedora modules was better, because we also built the
  package against the system-wide library, so we actually unit-tested the
  server+lib pair.


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