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Re: pg_upgrade automatic testing

From: Bruce Momjian <bruce(at)momjian(dot)us>
To: Peter Eisentraut <peter_e(at)gmx(dot)net>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: pg_upgrade automatic testing
Date: 2011-09-01 23:10:57
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Lists: pgsql-hackers
Peter Eisentraut wrote:
> On tis, 2011-08-30 at 16:25 -0400, Tom Lane wrote:
> > So I think that as given, this script is only useful for testing
> > pg_upgrade of $currentversion to $currentversion.  Which is surely
> > better than no test at all, but it would not for example have caught
> > the 8.3 incompatibility that was just reported.
> Well, the goal was always current to current version.  Cross-version
> testing is obviously important, but will be quite a bit harder.
> > How can we improve things here?  I've toyed with the idea of
> > installing so that we can refer to it relative to
> > $libdir, but that might be a bit invasive, especially if we were to
> > try to back-patch it as far as 8.3. 
> Aside from hesitations to backpatch those sorts of changes, it would
> effectively prevent us from ever removing anything from the C libraries
> used in the regression tests, because we need to keep the symbols around
> so that the schema dump can load successfully into the new instance.
> I think a solution would have to be one of:
> 1) pg_upgrade needs a mode to cope with these situations.  It can tell
> the user, I upgraded your installation, but some dynamic modules appear
> to be missing, you need to sort that out before you can put this back
> into use.
> 2) Design a different test schema to load into the database before
> running pg_upgrade.  This would then be a one-line change in the script.

Here are the scripts I use for testing:

  Bruce Momjian  <bruce(at)momjian(dot)us>

  + It's impossible for everything to be true. +

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