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Tom Lane bfa3d27906 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 20:35:53 -05:00
..
backend Rename parser token REF to REF_P to avoid a symbol conflict. 2022-10-16 15:27:04 -04:00
bin Translation updates 2021-02-08 18:13:24 +01:00
common Replace use of sys_siglist[] with strsignal(). 2020-07-15 22:05:13 -04:00
include Rename parser token REF to REF_P to avoid a symbol conflict. 2022-10-16 15:27:04 -04:00
interfaces Stamp 9.5.25. 2021-02-08 17:03:12 -05:00
makefiles Select CFLAGS_SL at configure time, not in platform-specific Makefiles. 2019-10-21 12:32:36 -04:00
pl Fix pl/perl test case so it will still work under Perl 5.36. 2022-06-01 16:15:47 -04:00
port Stamp 9.5.25. 2021-02-08 17:03:12 -05:00
template Further tweaking of PG_SYSROOT heuristics for macOS. 2021-01-20 12:07:57 -05:00
test Create common infrastructure for cross-version upgrade testing. 2023-01-16 20:35:53 -05:00
timezone Update time zone data files to tzdata release 2021a. 2021-01-24 16:29:48 -05:00
tools Sync our copy of the timezone library with IANA release tzcode2020c. 2020-10-16 21:40:16 -04:00
tutorial Remove no-longer-required function declarations. 2015-05-24 12:20:23 -04:00
.gitignore
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Makefile Install TAP test infrastructure so it's available for extension testing. 2016-09-23 15:50:00 -04:00
Makefile.global.in Back-patch src/test/recovery and PostgresNode from 9.6 to 9.5. 2020-03-19 09:39:26 -07:00
Makefile.shlib Ensure static libraries have correct mod time even if ranlib messes it up. 2018-11-29 15:53:44 -05:00
bcc32.mak Autoconfiscate selection of 64-bit int type for 64-bit large object API. 2012-10-07 21:52:43 -04:00
nls-global.mk nls-global.mk: search build dir for source files, too 2016-06-07 18:55:18 -04:00
win32.mak Autoconfiscate selection of 64-bit int type for 64-bit large object API. 2012-10-07 21:52:43 -04:00