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52585f8f07
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Tom Lane 52585f8f07 Create common infrastructure for cross-version upgrade testing. 
To test pg_upgrade across major PG versions, we have to be able to
modify or drop any old objects with no-longer-supported properties,
and we have to be able to deal with cosmetic changes in pg_dump output.
Up to now, the buildfarm and pg_upgrade's own test infrastructure had
separate implementations of the former, and we had nothing but very
ad-hoc rules for the latter (including an arbitrary threshold on how
many lines of unchecked diff were okay!).  This patch creates a Perl
module that can be shared by both those use-cases, and adds logic
that deals with pg_dump output diffs in a much more tightly defined
fashion.

This largely supersedes previous efforts in commits 0df9641d3,
9814ff550, and 62be9e4cd, which developed a SQL-script-based solution
for the task of dropping old objects.  There was nothing fundamentally
wrong with that work in itself, but it had no basis for solving the
output-formatting problem.  The most plausible way to deal with
formatting is to build a Perl module that can perform editing on the
dump files; and once we commit to that, it makes more sense for the
same module to also embed the knowledge of what has to be done for
dropping old objects.

Back-patch versions of the helper module as far as 9.2, to
support buildfarm animals that still test that far back.
It's also necessary to back-patch PostgreSQL/Version.pm,
because the new code depends on that.  I fixed up pg_upgrade's
002_pg_upgrade.pl in v15, but did not look into back-patching
it further than that.

Tom Lane and Andrew Dunstan

Discussion: https://postgr.es/m/891521.1673657296@sss.pgh.pa.us
2023-01-16 20:35:55 -05:00
..
backend Tighten up VACUUM's approach to setting VM bits. 2023-01-16 09:34:37 -08:00
bin Create common infrastructure for cross-version upgrade testing. 2023-01-16 20:35:55 -05:00
common Code cleanup 2023-01-12 07:37:39 +01:00
fe_utils Common function for percent placeholder replacement 2023-01-11 10:42:35 +01:00
include Add BufFileRead variants with short read and EOF detection 2023-01-16 11:01:31 +01:00
interfaces Update copyright for 2023 2023-01-02 15:00:37 -05:00
makefiles Update copyright for 2023 2023-01-02 15:00:37 -05:00
pl New header varatt.h split off from postgres.h 2023-01-10 05:54:36 +01:00
port Update copyright for 2023 2023-01-02 15:00:37 -05:00
template Use unnamed POSIX semaphores on Cygwin. 2023-01-06 10:33:28 +13:00
test Create common infrastructure for cross-version upgrade testing. 2023-01-16 20:35:55 -05:00
timezone Update copyright for 2023 2023-01-02 15:00:37 -05:00
tools Fix MSVC build 2023-01-11 14:41:52 +01:00
tutorial Update copyright for 2023 2023-01-02 15:00:37 -05:00
.gitignore
DEVELOPERS
Makefile
Makefile.global.in autoconf: Move export_dynamic determination to configure 2022-12-06 18:55:28 -08:00
Makefile.shlib autoconf: Rely on ar supporting index creation 2022-10-07 11:53:39 -07:00
meson.build Update copyright for 2023 2023-01-02 15:00:37 -05:00
nls-global.mk Fix for make unportability 2022-07-13 09:15:01 +02:00