Re: symbol mismatches on minor version upgrades

On tis, 2011-08-30 at 15:31 -0400, Tom Lane wrote:
> While not wishing to deny that this can be a problem, I think you're
> overstating this aspect:
> 
> > Now if this had been, say, plpython, which is also developed closely
> > together with the backend, but is probably shipped in a separate binary
> > package and has extra dependencies, so it might reasonably not be
> > upgraded at the same time, there would be additional problems.  We
> > should figure out a way to advise packagers about putting in tight
> > enough version dependencies when this happens.
> 
> This is not possible at least in the Red Hat world, because all the
> subpackages have exact-version-and-release dependencies tying them
> together.  That's distro policy not just my whim, and I'd expect other
> server-grade distros to have similar policies. 

Well, the Debian packages don't do this.  Obviously, they could, but no
one has ever clarified this.

Exactly which distribution policy is this?  I would rather think that
this is something that upstream needs to determine.