Tom Lane a1168855e0 Fix NULLIF()'s handling of read-write expanded objects. ... If passed a read-write expanded object pointer, the EEOP_NULLIF code would hand that same pointer to the equality function and then (unless equality was reported) also return the same pointer as its value. This is no good, because a function that receives a read-write expanded object pointer is fully entitled to scribble on or even delete the object, thus corrupting the NULLIF output. (This problem is likely unobservable with the equality functions provided in core Postgres, but it's easy to demonstrate with one coded in plpgsql.) To fix, make sure the pointer passed to the equality function is read-only. We can still return the original read-write pointer as the NULLIF result, allowing optimization of later operations. Per bug #18722 from Alexander Lakhin. This has been wrong since we invented expanded objects, so back-patch to all supported branches. Discussion: https://postgr.es/m/18722-fd9e645448cc78b4@postgresql.org		2024-11-25 18:09:10 -05:00
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access	Unpin buffer before inplace update waits for an XID to end.	2024-10-29 09:39:59 -07:00
bootstrap	Update copyright for 2021	2021-01-02 13:06:25 -05:00
catalog	Cope with inplace update making catcache stale during TOAST fetch.	2024-06-27 19:21:12 -07:00
commands	doc: Add better description for rewrite functions in event triggers	2024-10-29 15:35:21 +09:00
common	Fix corner-case 64-bit integer subtraction bug on some platforms.	2023-11-09 09:55:39 +00:00
datatype	Update copyright for 2021	2021-01-02 13:06:25 -05:00
executor	Fix NULLIF()'s handling of read-write expanded objects.	2024-11-25 18:09:10 -05:00
fe_utils	Allow db.schema.table patterns, but complain about random garbage.	2022-04-20 11:39:44 -04:00
foreign	Initial pgindent and pgperltidy run for v14.	2021-05-12 13:14:10 -04:00
jit	Monkey-patch LLVM code to fix ARM relocation bug.	2024-11-06 23:09:50 +13:00
lib	simplehash: Free collisions array in SH_STAT	2024-04-07 19:09:05 -07:00
libpq	Fix handling of SCRAM-SHA-256's channel binding with RSA-PSS certificates	2023-02-15 10:12:33 +09:00
mb	Fix incautious handling of possibly-miscoded strings in client code.	2021-06-07 14:15:25 -04:00
nodes	Undo unintentional ABI break in struct ResultRelInfo.	2024-11-16 12:58:26 -05:00
optimizer	Account for optimized MinMax aggregates during SS_finalize_plan.	2024-05-18 14:31:35 -04:00
parser	Avoid unnecessary plancache revalidation of utility statements.	2023-08-24 12:02:40 -04:00
partitioning	Fix relcache inconsistency hazard in partition detach	2021-04-22 15:13:25 -04:00
port	Replace pgwin32_is_junction() with lstat().	2024-11-08 09:36:53 +10:30
portability	Fix another portability bug in recent pgbench commit.	2021-03-10 23:20:41 +13:00
postmaster	Remove temporary files after backend crash	2021-03-18 17:38:28 +01:00
regex	Avoid assertion due to disconnected NFA sub-graphs in regex parsing.	2024-11-15 18:23:38 -05:00
replication	Fix possibility of logical decoding partial transaction changes.	2024-07-11 22:48:13 +09:00
rewrite	Fix calculation of which GENERATED columns need to be updated.	2023-01-05 14:12:17 -05:00
snowball	Update snowball	2021-02-19 08:10:15 +01:00
statistics	Extended statistics on expressions	2021-03-27 00:01:11 +01:00
storage	At end of recovery, reset all sinval-managed caches.	2024-10-25 06:51:07 -07:00
tcop	Restrict accesses to non-system views and foreign tables during pg_dump.	2024-08-05 06:05:23 -07:00
tsearch	Add comments and a missing CHECK_FOR_INTERRUPTS in ts_headline.	2022-11-21 17:07:07 -05:00
utils	Revert "For inplace update, send nontransactional invalidations."	2024-11-02 09:05:05 -07:00
.gitignore	Refactor dlopen() support	2018-09-06 11:33:04 +02:00
c.h	Assume that <stdbool.h> conforms to the C standard.	2024-11-25 20:53:41 +13:00
fmgr.h	Update copyright for 2021	2021-01-02 13:06:25 -05:00
funcapi.h	Reconsider the handling of procedure OUT parameters.	2021-06-10 17:11:36 -04:00
getaddrinfo.h	Update copyright for 2021	2021-01-02 13:06:25 -05:00
getopt_long.h	Update copyright for 2021	2021-01-02 13:06:25 -05:00
Makefile	Build in some knowledge about foreign-key relationships in the catalogs.	2021-02-02 17:11:55 -05:00
miscadmin.h	Fix improper interactions between session_authorization and role.	2024-11-11 10:29:54 -05:00
pg_config.h.in	Assume that <stdbool.h> conforms to the C standard.	2024-11-25 20:53:41 +13:00
pg_config_ext.h.in	Autoconfiscate selection of 64-bit int type for 64-bit large object API.	2012-10-07 21:52:43 -04:00
pg_config_manual.h	Rename debug_invalidate_system_caches_always to debug_discard_caches.	2021-07-13 15:01:01 -04:00
pg_getopt.h	Update copyright for 2021	2021-01-02 13:06:25 -05:00
pg_trace.h	Update copyright for 2021	2021-01-02 13:06:25 -05:00
pgstat.h	Fix performance regression from session statistics.	2021-09-16 02:10:57 -07:00
pgtar.h	Update copyright for 2021	2021-01-02 13:06:25 -05:00
pgtime.h	Update copyright for 2021	2021-01-02 13:06:25 -05:00
port.h	Replace pgwin32_is_junction() with lstat().	2024-11-08 09:36:53 +10:30
postgres.h	Fix misleading comments about TOAST access macros.	2021-09-08 14:11:35 -04:00
postgres_ext.h	Phase 2 of pgindent updates.	2017-06-21 15:19:25 -04:00
postgres_fe.h	Update copyright for 2021	2021-01-02 13:06:25 -05:00
rusagestub.h	Update copyright for 2021	2021-01-02 13:06:25 -05:00
windowapi.h	Update copyright for 2021	2021-01-02 13:06:25 -05:00