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Heikki Linnakangas 9d8ab2c461 Update TransactionXmin when MyProc->xmin is updated 
GetSnapshotData() set TransactionXmin = MyProc->xmin, but when
SnapshotResetXmin() advanced MyProc->xmin, it did not advance
TransactionXmin correspondingly. That meant that TransactionXmin could
be older than MyProc->xmin, and XIDs between than TransactionXmin and
the real MyProc->xmin could be vacuumed away. One known consequence is
in pg_subtrans lookups: we might try to look up the status of an XID
that was already truncated away.

Back-patch to all supported versions.

Reviewed-by: Andres Freund
Discussion: https://www.postgresql.org/message-id/d27a046d-a1e4-47d1-a95c-fbabe41debb4@iki.fi
2024-12-21 23:42:55 +02:00
..
backend Update TransactionXmin when MyProc->xmin is updated 2024-12-21 23:42:55 +02:00
bin Fix memory leak in pg_restore with zstd-compressed data. 2024-12-17 22:31:26 -05:00
common Fix outdated comment of scram_build_secret() 2024-12-10 12:54:16 +09:00
fe_utils Prevent mis-encoding of "trailing junk after numeric literal" errors. 2024-09-05 12:42:33 -04:00
include Fix corruption when relation truncation fails. 2024-12-20 23:57:26 +13:00
interfaces Fix broken list-munging in ecpg's remove_variables(). 2024-12-01 14:15:37 -05:00
makefiles Use --strip-unneeded when stripping static libraries with GNU strip. 2023-04-20 18:12:32 -04:00
pl Add support for Tcl 9 2024-11-25 12:27:19 +01:00
port Fix overflow in bsearch_arg() with more than INT_MAX elements 2024-10-28 14:07:59 +02:00
template Use unnamed POSIX semaphores on Cygwin. 2023-01-06 10:33:28 +13:00
test Fix Assert failure in WITH RECURSIVE UNION queries 2024-12-19 13:12:41 +13:00
timezone Update time zone data files to tzdata release 2024b. 2024-10-29 11:49:56 -04:00
tools Avoid mislabeling of lateral references, redux. 2024-11-30 12:42:20 -05:00
tutorial Pre-beta mechanical code beautification. 2023-05-19 17:24:48 -04:00
.gitignore
DEVELOPERS
Makefile Integrate pg_bsd_indent into our build/test infrastructure. 2023-02-12 12:22:21 -05:00
Makefile.global.in Suppress macOS warnings about duplicate libraries in link commands. 2023-09-29 14:07:30 -04:00
Makefile.shlib Stop using "-multiply_defined suppress" on macOS. 2023-09-26 21:06:21 -04:00
meson.build Integrate pg_bsd_indent into our build/test infrastructure. 2023-02-12 12:22:21 -05:00
nls-global.mk Fix for make unportability 2022-07-13 09:15:01 +02:00