Thomas Munro [Wed, 27 Nov 2024 02:43:18 +0000 (15:43 +1300)]
If a C23 compiler is detected, try asking for C17.
Branches before 16 can't be compiled with a C23 compiler (see
deprecation warnings silenced by commit
f9a56e72, and non-back-patchable
changes made in 16 by commit
1c27d16e). Test __STDC_VERSION__, and if
it's above C17 then try appending -std=gnu17. The test is done with the
user's CFLAGS, so an acceptable language version can also be configured
manually that way.
This is done in branches 15 and older, back to 9.2, per policy of
keeping them buildable with modern tools.
Discussion: https://postgr.es/m/87o72eo9iu.fsf%40gentoo.org
Michael Paquier [Wed, 27 Nov 2024 00:31:42 +0000 (09:31 +0900)]
Handle better implicit transaction state of pipeline mode
When using a pipeline, a transaction starts from the first command and
is committed with a Sync message or when the pipeline ends.
Functions like IsInTransactionBlock() or PreventInTransactionBlock()
were already able to understand a pipeline as being in a transaction
block, but it was not the case of CheckTransactionBlock(). This
function is called for example to generate a WARNING for SET LOCAL,
complaining that it is used outside of a transaction block.
The current state of the code caused multiple problems, like:
- SET LOCAL executed at any stage of a pipeline issued a WARNING, even
if the command was at least second in line where the pipeline is in a
transaction state.
- LOCK TABLE failed when invoked at any step of a pipeline, even if it
should be able to work within a transaction block.
The pipeline protocol assumes that the first command of a pipeline is
not part of a transaction block, and that any follow-up commands is
considered as within a transaction block.
This commit changes the backend so as an implicit transaction block is
started each time the first Execute message of a pipeline has finished
processing, with this implicit transaction block ended once a sync is
processed. The checks based on XACT_FLAGS_PIPELINING in the routines
checking if we are in a transaction block are not necessary: it is
enough to rely on the existing ones.
Some tests are added to pgbench, that can be backpatched down to v17
when \syncpipeline is involved and down to v14 where \startpipeline and
\endpipeline are available. This is unfortunately limited regarding the
error patterns that can be checked, but it provides coverage for various
pipeline combinations to check if these succeed or fail. These tests
are able to capture the case of SET LOCAL's WARNING. The author has
proposed a different feature to improve the coverage by adding similar
meta-commands to psql where error messages could be checked, something
more useful for the cases where commands cannot be used in transaction
blocks, like REINDEX CONCURRENTLY or VACUUM. This is considered as
future work for v18~.
Author: Anthonin Bonnefoy
Reviewed-by: Jelte Fennema-Nio, Michael Paquier
Discussion: https://postgr.es/m/CAO6_XqrWO8uNBQrSu5r6jh+vTGi5Oiyk4y8yXDORdE2jbzw8xw@mail.gmail.com
Backpatch-through: 13
Tom Lane [Mon, 25 Nov 2024 23:08:58 +0000 (18:08 -0500)]
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
Noah Misch [Mon, 25 Nov 2024 22:42:35 +0000 (14:42 -0800)]
Avoid "you don't own a lock of type ExclusiveLock" in GRANT TABLESPACE.
This WARNING appeared because SearchSysCacheLocked1() read
cc_relisshared before catcache initialization, when the field is false
unconditionally. On the basis of reading false there, it constructed a
locktag as though pg_tablespace weren't relisshared. Only shared
catalogs could be affected, and only GRANT TABLESPACE was affected in
practice. SearchSysCacheLocked1() callers use one other shared-relation
syscache, DATABASEOID. DATABASEOID is initialized by the end of
CheckMyDatabase(), making the problem unreachable for pg_database.
Back-patch to v13 (all supported versions). This has no known impact
before v16, where ExecGrant_common() first appeared. Earlier branches
avoid trouble by having a separate ExecGrant_Tablespace() that doesn't
use LOCKTAG_TUPLE. However, leaving this unfixed in v15 could ensnare a
future back-patch of a SearchSysCacheLocked1() call.
Reported by Aya Iwata.
Discussion: https://postgr.es/m/OS7PR01MB11964507B5548245A7EE54E70EA212@OS7PR01MB11964.jpnprd01.prod.outlook.com
Tom Lane [Mon, 25 Nov 2024 17:50:17 +0000 (12:50 -0500)]
Update configure probes for CFLAGS needed for ARM CRC instructions.
On ARM platforms where the baseline CPU target lacks CRC instructions,
we need to supply a -march flag to persuade the compiler to compile
such instructions. It turns out that our existing choice of
"-march=armv8-a+crc" has not worked for some time, because recent gcc
will interpret that as selecting software floating point, and then
will spit up if the platform requires hard-float ABI, as most do
nowadays. The end result was to silently fall back to software CRC,
which isn't very desirable since in practice almost all currently
produced ARM chips do have hardware CRC.
We can fix this by using "-march=armv8-a+crc+simd" to enable the
correct ABI choice. (This has no impact on the code actually
generated, since neither of the files we compile with this flag
does any floating-point stuff, let alone SIMD.) Keep the test for
"-march=armv8-a+crc" since that's required for soft-float ABI,
but try that second since most platforms we're likely to build on
use hard-float.
Since this isn't working as-intended on the last several years'
worth of gcc releases, back-patch to all supported branches.
Discussion: https://postgr.es/m/
4496616.iHFcN1HehY@portable-bastien
Peter Eisentraut [Mon, 25 Nov 2024 07:03:16 +0000 (08:03 +0100)]
Add support for Tcl 9
Tcl 9 changed several API functions to take Tcl_Size, which is
ptrdiff_t, instead of int, for 64-bit enablement. We have to change a
few local variables to be compatible with that. We also provide a
fallback typedef of Tcl_Size for older Tcl versions.
The affected variables are used for quantities that will not approach
values beyond the range of int, so this doesn't change any
functionality.
Reviewed-by: Tristan Partin <[email protected]>
Discussion: https://www.postgresql.org/message-id/flat/
bce0fe54-75b4-438e-b42b-
8e84bc7c0e9c%40eisentraut.org
Thomas Munro [Mon, 25 Nov 2024 00:11:28 +0000 (13:11 +1300)]
Assume that <stdbool.h> conforms to the C standard.
Previously we checked "for <stdbool.h> that conforms to C99" using
autoconf's AC_HEADER_STDBOOL macro. We've required C99 since PostgreSQL
12, so the test was redundant, and under C23 it was broken: autoconf
2.69's implementation doesn't understand C23's new empty header (the
macros it's looking for went away, replaced by language keywords).
Later autoconf versions fixed that, but let's just remove the
anachronistic test.
HAVE_STDBOOL_H and HAVE__BOOL will no longer be defined, but they
weren't directly tested in core or likely extensions (except in 11, see
below). PG_USE_STDBOOL (or USE_STDBOOL in 11 and 12) is still defined
when sizeof(bool) is 1, which should be true on all modern systems.
Otherwise we define our own bool type and values of size 1, which would
fail to compile under C23 as revealed by the broken test. (We'll
probably clean that dead code up in master, but here we want a minimal
back-patchable change.)
This came to our attention when GCC 15 recently started using using C23
by default and failed to compile the replacement code, as reported by
Sam James and build farm animal alligator.
Back-patch to all supported releases, and then two older versions that
also know about <stdbool.h>, per the recently-out-of-support policy[1].
12 requires C99 so it's much like the supported releases, but 11 only
assumes C89 so it now uses AC_CHECK_HEADERS instead of the overly picky
AC_HEADER_STDBOOL. (I could find no discussion of which historical
systems had <stdbool.h> but failed the conformance test; if they ever
existed, they surely aren't relevant to that policy's goals.)
[1] https://wiki.postgresql.org/wiki/Committing_checklist#Policies
Reported-by: Sam James <[email protected]>
Reviewed-by: Peter Eisentraut <[email protected]> (master version)
Reviewed-by: Tom Lane <[email protected]> (approach)
Discussion: https://www.postgresql.org/message-id/flat/87o72eo9iu.fsf%40gentoo.org
Thomas Munro [Fri, 22 Nov 2024 01:53:21 +0000 (14:53 +1300)]
jit: Use -mno-outline-atomics for bitcode on ARM.
If the executable's .o files were produced by a compiler (probably gcc)
not using -moutline-atomics, and the corresponding .bc files were
produced by clang using -moutline-atomics (probably by default), then
the generated bitcode functions would have the target attribute
"+outline-atomics", and could fail at runtime when inlined. If the
target ISA at bitcode generation time was armv8-a (the most conservative
aarch64 target, no LSE), then LLVM IR atomic instructions would generate
calls to functions in libgcc.a or libclang_rt.*.a that switch between
LL/SC and faster LSE instructions depending on a runtime AT_HWCAP check.
Since the corresponding .o files didn't need those functions, they
wouldn't have been included in the executable, and resolution would
fail.
At least Debian and Ubuntu are known to ship gcc and clang compilers
that target armv8-a but differ on the use of outline atomics by default.
Fix, by suppressing the outline atomics attribute in bitcode explicitly.
Inline LL/SC instructions will be generated for atomic operations in
bitcode built for armv8-a. Only configure scripts are adjusted for now,
because the meson build system doesn't generate bitcode yet.
This doesn't seem to be a new phenomenon, so real cases of functions
using atomics that are inlined by JIT must be rare in the wild given how
long it took for a bug report to arrive. The reported case could be
reduced to:
postgres=# set jit_inline_above_cost = 0;
SET
postgres=# set jit_above_cost = 0;
SET
postgres=# select pg_last_wal_receive_lsn();
WARNING: failed to resolve name __aarch64_swp4_acq_rel
FATAL: fatal llvm error: Program used external function
'__aarch64_swp4_acq_rel' which could not be resolved!
The change doesn't affect non-ARM systems or later target ISAs.
Back-patch to all supported releases.
Reported-by: Alexander Kozhemyakin <[email protected]>
Discussion: https://postgr.es/m/18610-
37bf303f904fede3%40postgresql.org
Álvaro Herrera [Thu, 21 Nov 2024 16:04:26 +0000 (17:04 +0100)]
Fix newly introduced 010_keep_recycled_wals.pl
It failed to set the archive_command as it desired because of a syntax
problem. Oversight in commit
90bcc7c2db1d.
This bug doesn't cause the test to fail, because the test only checks
pg_rewind's output messages, not the actual outcome (and the outcome in
both cases is that the file is kept, not deleted). But in either case
the message about the file being kept is there, so it's hard to get
excited about doing much more.
Reported-by: Antonin Houska <[email protected]>
Author: Alexander Kukushkin <
[email protected]>
Discussion: https://postgr.es/m/7822.
1732167825@antos
Álvaro Herrera [Thu, 21 Nov 2024 15:54:36 +0000 (16:54 +0100)]
Fix outdated bit in README.tuplock
Apparently this information has been outdated since first committed,
because we adopted a different implementation during development per
reviews and this detail was not updated in the README.
This has been wrong since commit
0ac5ad5134f2 introduced the file in
2013. Backpatch to all live branches.
Reported-by: Will Mortensen <[email protected]>
Discussion: https://postgr.es/m/CAMpnoC6yEQ=c0Rdq-J7uRedrP7Zo9UMp6VZyP23QMT68n06cvA@mail.gmail.com
Tom Lane [Wed, 20 Nov 2024 17:03:47 +0000 (12:03 -0500)]
Avoid assertion failure if a setop leaf query contains setops.
Ordinarily transformSetOperationTree will collect all UNION/
INTERSECT/EXCEPT steps into the setOperations tree of the topmost
Query, so that leaf queries do not contain any setOperations.
However, it cannot thus flatten a subquery that also contains
WITH, ORDER BY, FOR UPDATE, or LIMIT. I (tgl) forgot that in
commit
07b4c48b6 and wrote an assertion in rule deparsing that
a leaf's setOperations would always be empty.
If it were nonempty then we would want to parenthesize the subquery
to ensure that the output represents the setop nesting correctly
(e.g. UNION below INTERSECT had better get parenthesized). So
rather than just removing the faulty Assert, let's change it into
an additional case to check to decide whether to add parens. We
don't expect that the additional case will ever fire, but it's
cheap insurance.
Man Zeng and Tom Lane
Discussion: https://postgr.es/m/
[email protected]
Tom Lane [Tue, 19 Nov 2024 23:26:19 +0000 (18:26 -0500)]
Compare collations before merging UNION operations.
In the dim past we figured it was okay to ignore collations
when combining UNION set-operation nodes into a single N-way
UNION operation. I believe that was fine at the time, but
it stopped being fine when we added nondeterministic collations:
the semantics of distinct-ness are affected by those. v17 made
it even less fine by allowing per-child sorting operations to
be merged via MergeAppend, although I think we accidentally
avoided any live bug from that.
Add a check that collations match before deciding that two
UNION nodes are equivalent. I also failed to resist the
temptation to comment plan_union_children() a little better.
Back-patch to all supported branches (v13 now), since they
all have nondeterministic collations.
Discussion: https://postgr.es/m/
3605568.
1731970579@sss.pgh.pa.us
Tom Lane [Mon, 18 Nov 2024 20:37:40 +0000 (15:37 -0500)]
Stamp 14.15.
Tom Lane [Sun, 17 Nov 2024 19:14:06 +0000 (14:14 -0500)]
Fix recently-exposed portability issue in regex optimization.
fixempties() counts the number of in-arcs in the regex NFA and then
allocates an array of that many arc pointers. If the NFA contains no
arcs, this amounts to malloc(0) for which some platforms return NULL.
The code mistakenly treats that as indicating out-of-memory. Thus,
we can get a bogus "out of memory" failure for some unsatisfiable
regexes.
This happens only in v15 and earlier, since
bea3d7e38 switched to
using palloc() rather than bare malloc(). And at least of the
platforms in the buildfarm, only AIX seems to return NULL. So the
impact is pretty narrow. But I don't especially want to ship code
that is failing its own regression tests, so let's fix this for
this week's releases.
A quick code survey says that there is only the one place in
src/backend/regex/ that is at risk of doing malloc(0), so we'll just
band-aid that place. A more future-proof fix could be to install a
malloc() wrapper similar to pg_malloc(). But this code seems unlikely
to change much more in the affected branches, so that's probably
overkill.
The only known test case for this involves a complemented character
class in a bracket expression, for example [^\s\S], and we didn't
support that in v13. So it may be that the problem is unreachable
in v13. But I'm not 100% sure of that, so patch v13 too.
Discussion: https://postgr.es/m/
661fd81b-f069-8f30-1a41-
e195c57449b4@gmail.com
Tom Lane [Sat, 16 Nov 2024 22:09:53 +0000 (17:09 -0500)]
Release notes for 17.2, 16.6, 15.10, 14.15, 13.18, 12.22.
Tom Lane [Sat, 16 Nov 2024 17:58:26 +0000 (12:58 -0500)]
Undo unintentional ABI break in struct ResultRelInfo.
Commits
aac2c9b4f et al. added a bool field to struct ResultRelInfo.
That's no problem in the master branch, but in released branches
care must be taken when modifying publicly-visible structs to avoid
an ABI break for extensions. Frequently we solve that by adding the
new field at the end of the struct, and that's what was done here.
But ResultRelInfo has stricter constraints than just about any other
node type in Postgres. Some executor APIs require extensions to index
into arrays of ResultRelInfo, which means that any change whatever in
sizeof(ResultRelInfo) causes a fatal ABI break.
Fortunately, this is easy to fix, because the new field can be
squeezed into available padding space instead --- indeed, that's where
it was put in master, so this fix also removes a cross-branch coding
variation.
Per report from Pavan Deolasee. Patch v14-v17 only; earlier versions
did not gain the extra field, nor is there any problem in master.
Discussion: https://postgr.es/m/CABOikdNmVBC1LL6pY26dyxAS2f+gLZvTsNt=2XbcyG7WxXVBBQ@mail.gmail.com
Noah Misch [Sat, 16 Nov 2024 04:39:56 +0000 (20:39 -0800)]
Fix per-session activation of ALTER {ROLE|DATABASE} SET role.
After commit
5a2fed911a85ed6d8a015a6bafe3a0d9a69334ae, the catalog state
resulting from these commands ceased to affect sessions. Restore the
longstanding behavior, which is like beginning the session with a SET
ROLE command. If cherry-picking the CVE-2024-10978 fixes, default to
including this, too. (This fixes an unintended side effect of fixing
CVE-2024-10978.) Back-patch to v12, like that commit. The release team
decided to include v12, despite the original intent to halt v12 commits
earlier this week.
Tom Lane and Noah Misch. Reported by Etienne LAFARGE.
Discussion: https://postgr.es/m/CADOZwSb0UsEr4_UTFXC5k7=fyyK8uKXekucd+-uuGjJsGBfxgw@mail.gmail.com
Masahiko Sawada [Sat, 16 Nov 2024 01:06:00 +0000 (17:06 -0800)]
Fix a possibility of logical replication slot's restart_lsn going backwards.
Previously LogicalIncreaseRestartDecodingForSlot() accidentally
accepted any LSN as the candidate_lsn and candidate_valid after the
restart_lsn of the replication slot was updated, so it potentially
caused the restart_lsn to move backwards.
A scenario where this could happen in logical replication is: after a
logical replication restart, based on previous candidate_lsn and
candidate_valid values in memory, the restart_lsn advances upon
receiving a subscriber acknowledgment. Then, logical decoding restarts
from an older point, setting candidate_lsn and candidate_valid based
on an old RUNNING_XACTS record. Subsequent subscriber acknowledgments
then update the restart_lsn to an LSN older than the current value.
In the reported case, after WAL files were removed by a checkpoint,
the retreated restart_lsn prevented logical replication from
restarting due to missing WAL segments.
This change essentially modifies the 'if' condition to 'else if'
condition within the function. The previous code had an asymmetry in
this regard compared to LogicalIncreaseXminForSlot(), which does
almost the same thing for different fields.
The WAL removal issue was reported by Hubert Depesz Lubaczewski.
Backpatch to all supported versions, since the bug exists since 9.4
where logical decoding was introduced.
Reviewed-by: Tomas Vondra, Ashutosh Bapat, Amit Kapila
Discussion: https://postgr.es/m/Yz2hivgyjS1RfMKs%40depesz.com
Discussion: https://postgr.es/m/
85fff40e-148b-4e86-b921-
b4b846289132%40vondra.me
Backpatch-through: 13
Tom Lane [Fri, 15 Nov 2024 23:23:38 +0000 (18:23 -0500)]
Avoid assertion due to disconnected NFA sub-graphs in regex parsing.
In commit
08c0d6ad6 which introduced "rainbow" arcs in regex NFAs,
I didn't think terribly hard about what to do when creating the color
complement of a rainbow arc. Clearly, the complement cannot match any
characters, and I took the easy way out by just not building any arcs
at all in the complement arc set. That mostly works, but Nikolay
Shaplov found a case where it doesn't: if we decide to delete that
sub-NFA later because it's inside a "{0}" quantifier, delsub()
suffered an assertion failure. That's because delsub() relies on
the target sub-NFA being fully connected. That was always true
before, and the best fix seems to be to restore that property.
Hence, invent a new arc type CANTMATCH that can be generated in
place of an empty color complement, and drop it again later when we
start NFA optimization. (At that point we don't need to do delsub()
any more, and besides there are other cases where NFA optimization can
lead to disconnected subgraphs.)
It appears that this bug has no consequences in a non-assert-enabled
build: there will be some transiently leaked NFA states/arcs, but
they'll get cleaned up eventually. Still, we don't like assertion
failures, so back-patch to v14 where rainbow arcs were introduced.
Per bug #18708 from Nikolay Shaplov.
Discussion: https://postgr.es/m/18708-
f94f2599c9d2c005@postgresql.org
Álvaro Herrera [Fri, 15 Nov 2024 11:53:12 +0000 (12:53 +0100)]
Avoid deleting critical WAL segments during pg_rewind
Previously, in unlucky cases, it was possible for pg_rewind to remove
certain WAL segments from the rewound demoted primary. In particular
this happens if those files have been marked for archival (i.e., their
.ready files were created) but not yet archived; the newly promoted node
no longer has such files because of them having been recycled, but they
are likely critical for recovery in the demoted node. If pg_rewind
removes them, recovery is not possible anymore.
Fix this by maintaining a hash table of files in this situation in the
scan that looks for a checkpoint, which the decide_file_actions phase
can consult so that it knows to preserve them.
Backpatch to 14. The problem also exists in 13, but that branch was not
blessed with commit
eb00f1d4bf96, so this patch is difficult to apply
there. Users of older releases will just have to continue to be extra
careful when rewinding.
Co-authored-by: Полина Бунгина (Polina Bungina) <[email protected]>
Co-authored-by: Alexander Kukushkin <[email protected]>
Reviewed-by: Kyotaro Horiguchi <[email protected]>
Reviewed-by: Atsushi Torikoshi <[email protected]>
Discussion: https://postgr.es/m/CAAtGL4AhzmBRsEsaDdz7065T+k+BscNadfTqP1NcPmsqwA5HBw@mail.gmail.com
Peter Geoghegan [Wed, 13 Nov 2024 01:57:37 +0000 (20:57 -0500)]
Count contrib/bloom index scans in pgstat view.
Maintain the pg_stat_user_indexes.idx_scan pgstat counter during
contrib/Bloom index scans.
Oversight in commit
9ee014fc, which added the Bloom index contrib
module.
Author: Masahiro Ikeda <
[email protected]>
Reviewed-By: Peter Geoghegan <[email protected]>
Discussion: https://postgr.es/m/
c48839d881388ee401a01807c686004d@oss.nttdata.com
Backpatch: 13- (all supported branches).
Alexander Korotkov [Mon, 11 Nov 2024 23:44:20 +0000 (01:44 +0200)]
Fix arrays comparison in CompareOpclassOptions()
The current code calls array_eq() and does not provide FmgrInfo. This commit
provides initialization of FmgrInfo and uses C collation as the safe option
for text comparison because we don't know anything about the semantics of
opclass options.
Backpatch to 13, where opclass options were introduced.
Reported-by: Nicolas Maus
Discussion: https://postgr.es/m/18692-
72ea398df3ec6712%40postgresql.org
Backpatch-through: 13
Tom Lane [Mon, 11 Nov 2024 22:47:15 +0000 (17:47 -0500)]
Stamp 14.14.
Tom Lane [Mon, 11 Nov 2024 22:40:13 +0000 (17:40 -0500)]
Last-minute updates for release notes.
Security: CVE-2024-10976, CVE-2024-10977, CVE-2024-10978, CVE-2024-10979
Tom Lane [Mon, 11 Nov 2024 22:05:53 +0000 (17:05 -0500)]
Parallel workers use AuthenticatedUserId for connection privilege checks.
Commit
5a2fed911 had an unexpected side-effect: the parallel worker
launched for the new test case would fail if it couldn't use a
superuser-reserved connection slot. The reason that test failed
while all our pre-existing ones worked is that the connection
privilege tests in InitPostgres had been based on the superuserness
of the leader's AuthenticatedUserId, but after the rearrangements
of
5a2fed911 we were testing the superuserness of CurrentUserId,
which the new test case deliberately made to be a non-superuser.
This all seems very accidental and probably not the behavior we really
want, but a security patch is no time to be redesigning things.
Pending some discussion about desirable semantics, hack it so that
InitPostgres continues to pay attention to the superuserness of
AuthenticatedUserId when starting a parallel worker.
Nathan Bossart and Tom Lane, per buildfarm member sawshark.
Security: CVE-2024-10978
Tom Lane [Mon, 11 Nov 2024 18:57:21 +0000 (13:57 -0500)]
Fix cross-version upgrade tests.
TestUpgradeXversion knows how to make the main regression database's
references to pg_regress.so be version-independent. But it doesn't
do that for plperl's database, so that the C function added by
commit
b7e3a52a8 is causing cross-version upgrade test failures.
Path of least resistance is to just drop the function at the end
of the new test.
In <= v14, also take the opportunity to clean up the generated
test files.
Security: CVE-2024-10979
Noah Misch [Mon, 11 Nov 2024 18:55:18 +0000 (10:55 -0800)]
src/tools/msvc: Respect REGRESS_OPTS in plcheck.
v16 commit
8fe3e697a1a83a722b107c7cb9c31084e1f4d077 used REGRESS_OPTS in
a way needing this. That broke "vcregress plcheck". Back-patch
v16..v12; newer versions don't have this build system.
Tom Lane [Mon, 11 Nov 2024 15:42:32 +0000 (10:42 -0500)]
Add needed .gitignore files in back branches.
v14 and earlier use generated test files, which require being
.gitignore'd to avoid git complaints when testing in-tree.
Security: CVE-2024-10979
Tom Lane [Mon, 11 Nov 2024 15:29:54 +0000 (10:29 -0500)]
Fix improper interactions between session_authorization and role.
The SQL spec mandates that SET SESSION AUTHORIZATION implies
SET ROLE NONE. We tried to implement that within the lowest-level
functions that manipulate these settings, but that was a bad idea.
In particular, guc.c assumes that it doesn't matter in what order
it applies GUC variable updates, but that was not the case for these
two variables. This problem, compounded by some hackish attempts to
work around it, led to some security-grade issues:
* Rolling back a transaction that had done SET SESSION AUTHORIZATION
would revert to SET ROLE NONE, even if that had not been the previous
state, so that the effective user ID might now be different from what
it had been.
* The same for SET SESSION AUTHORIZATION in a function SET clause.
* If a parallel worker inspected current_setting('role'), it saw
"none" even when it should see something else.
Also, although the parallel worker startup code intended to cope
with the current role's pg_authid row having disappeared, its
implementation of that was incomplete so it would still fail.
Fix by fully separating the miscinit.c functions that assign
session_authorization from those that assign role. To implement the
spec's requirement, teach set_config_option itself to perform "SET
ROLE NONE" when it sets session_authorization. (This is undoubtedly
ugly, but the alternatives seem worse. In particular, there's no way
to do it within assign_session_authorization without incompatible
changes in the API for GUC assign hooks.) Also, improve
ParallelWorkerMain to directly set all the relevant user-ID variables
instead of relying on some of them to get set indirectly. That
allows us to survive not finding the pg_authid row during worker
startup.
In v16 and earlier, this includes back-patching
9987a7bf3 which
fixed a violation of GUC coding rules: SetSessionAuthorization
is not an appropriate place to be throwing errors from.
Security: CVE-2024-10978
Nathan Bossart [Mon, 11 Nov 2024 15:00:00 +0000 (09:00 -0600)]
Ensure cached plans are correctly marked as dependent on role.
If a CTE, subquery, sublink, security invoker view, or coercion
projection references a table with row-level security policies, we
neglected to mark the plan as potentially dependent on which role
is executing it. This could lead to later executions in the same
session returning or hiding rows that should have been hidden or
returned instead.
Reported-by: Wolfgang Walther
Reviewed-by: Noah Misch
Security: CVE-2024-10976
Backpatch-through: 12
Noah Misch [Mon, 11 Nov 2024 14:23:43 +0000 (06:23 -0800)]
Block environment variable mutations from trusted PL/Perl.
Many process environment variables (e.g. PATH), bypass the containment
expected of a trusted PL. Hence, trusted PLs must not offer features
that achieve setenv(). Otherwise, an attacker having USAGE privilege on
the language often can achieve arbitrary code execution, even if the
attacker lacks a database server operating system user.
To fix PL/Perl, replace trusted PL/Perl %ENV with a tied hash that just
replaces each modification attempt with a warning. Sites that reach
these warnings should evaluate the application-specific implications of
proceeding without the environment modification:
Can the application reasonably proceed without the modification?
If no, switch to plperlu or another approach.
If yes, the application should change the code to stop attempting
environment modifications. If that's too difficult, add "untie
%main::ENV" in any code executed before the warning. For example,
one might add it to the start of the affected function or even to
the plperl.on_plperl_init setting.
In passing, link to Perl's guidance about the Perl features behind the
security posture of PL/Perl.
Back-patch to v12 (all supported versions).
Andrew Dunstan and Noah Misch
Security: CVE-2024-10979
Peter Eisentraut [Mon, 11 Nov 2024 12:57:37 +0000 (13:57 +0100)]
Translation updates
Source-Git-URL: https://git.postgresql.org/git/pgtranslation/messages.git
Source-Git-Hash:
aa68946b3e7aa4447636af97ee7b0f249144085d
Michael Paquier [Mon, 11 Nov 2024 01:20:01 +0000 (10:20 +0900)]
libpq: Bail out during SSL/GSS negotiation errors
This commit changes libpq so that errors reported by the backend during
the protocol negotiation for SSL and GSS are discarded by the client, as
these may include bytes that could be consumed by the client and write
arbitrary bytes to a client's terminal.
A failure with the SSL negotiation now leads to an error immediately
reported, without a retry on any other methods allowed, like a fallback
to a plaintext connection.
A failure with GSS discards the error message received, and we allow a
fallback as it may be possible that the error is caused by a connection
attempt with a pre-11 server, GSS encryption having been introduced in
v12. This was a problem only with v17 and newer versions; older
versions discard the error message already in this case, assuming a
failure caused by a lack of support for GSS encryption.
Author: Jacob Champion
Reviewed-by: Peter Eisentraut, Heikki Linnakangas, Michael Paquier
Security: CVE-2024-10977
Backpatch-through: 12
Tom Lane [Sun, 10 Nov 2024 18:40:41 +0000 (13:40 -0500)]
Release notes for 17.1, 16.5, 15.9, 14.14, 13.17, 12.21.
Tom Lane [Fri, 8 Nov 2024 18:42:01 +0000 (13:42 -0500)]
Improve fix for not entering parallel mode when holding interrupts.
Commit
ac04aa84a put the shutoff for this into the planner, which is
not ideal because it doesn't prevent us from re-using a previously
made parallel plan. Revert the planner change and instead put the
shutoff into InitializeParallelDSM, modeling it on the existing code
there for recovering from failure to allocate a DSM segment.
However, that code path is mostly untested, and testing a bit harder
showed there's at least one bug: ExecHashJoinReInitializeDSM is not
prepared for us to have skipped doing parallel DSM setup. I also
thought the Assert in ReinitializeParallelWorkers is pretty
ill-advised, and replaced it with a silent Min() operation.
The existing test case added by
ac04aa84a serves fine to test this
version of the fix, so no change needed there.
Patch by me, but thanks to Noah Misch for the core idea that we
could shut off worker creation when !INTERRUPTS_CAN_BE_PROCESSED.
Back-patch to v12, as
ac04aa84a was.
Discussion: https://postgr.es/m/CAC-SaSzHUKT=vZJ8MPxYdC_URPfax+yoA1hKTcF4ROz_Q6z0_Q@mail.gmail.com
Amit Langote [Fri, 8 Nov 2024 07:30:33 +0000 (16:30 +0900)]
Disallow partitionwise join when collations don't match
If the collation of any join key column doesn’t match the collation of
the corresponding partition key, partitionwise joins can yield incorrect
results. For example, rows that would match under the join key collation
might be located in different partitions due to the partitioning
collation. In such cases, a partitionwise join would yield different
results from a non-partitionwise join, so disallow it in such cases.
Reported-by: Tender Wang <[email protected]>
Author: Jian He <
[email protected]>
Reviewed-by: Tender Wang <[email protected]>
Reviewed-by: Junwang Zhao <[email protected]>
Discussion: https://postgr.es/m/CAHewXNno_HKiQ6PqyLYfuqDtwp7KKHZiH1J7Pqyz0nr+PS2Dwg@mail.gmail.com
Backpatch-through: 12
Amit Langote [Fri, 8 Nov 2024 07:06:46 +0000 (16:06 +0900)]
Disallow partitionwise grouping when collations don't match
If the collation of any grouping column doesn’t match the collation of
the corresponding partition key, partitionwise grouping can yield
incorrect results. For example, rows that would be grouped under the
grouping collation may end up in different partitions under the
partitioning collation. In such cases, full partitionwise grouping
would produce results that differ from those without partitionwise
grouping, so disallowed that.
Partial partitionwise aggregation is still allowed, as the Finalize
step reconciles partition-level aggregates with grouping requirements
across all partitions, ensuring that the final output remains
consistent.
This commit also fixes group_by_has_partkey() by ensuring the
RelabelType node is stripped from grouping expressions when matching
them to partition key expressions to avoid false mismatches.
Bug: #18568
Reported-by: Webbo Han <[email protected]>
Author: Webbo Han <
1105066510@qq.com>
Reviewed-by: Tender Wang <[email protected]>
Reviewed-by: Aleksander Alekseev <[email protected]>
Reviewed-by: Jian He <[email protected]>
Discussion: https://postgr.es/m/18568-
2a9afb6b9f7e6ed3@postgresql.org
Discussion: https://postgr.es/m/
[email protected]
Discussion: https://postgr.es/m/CAHewXNno_HKiQ6PqyLYfuqDtwp7KKHZiH1J7Pqyz0nr+PS2Dwg@mail.gmail.com
Backpatch-through: 12
Peter Eisentraut [Fri, 8 Nov 2024 06:17:55 +0000 (07:17 +0100)]
Message style improvement
Backpatch the part of
edee0c621de that applies to
a90bdd7a44d, which
was also backpatched. That way, the message is consistent in all
branches.
Thomas Munro [Sat, 6 Aug 2022 00:02:43 +0000 (12:02 +1200)]
Replace pgwin32_is_junction() with lstat().
Now that lstat() reports junction points with S_IFLNK/S_ISLINK(), and
unlink() can unlink them, there is no need for conditional code for
Windows in a few places. That was expressed by testing for WIN32 or
S_ISLNK, which we can now constant-fold.
The coding around pgwin32_is_junction() was a bit suspect anyway, as we
never checked for errors, and we also know that errors can be spuriously
reported because of transient sharing violations on this OS. The
lstat()-based code has handling for that.
This also reverts
4fc6b6ee on master only. That was done because
lstat() didn't previously work for symlinks (junction points), but now
it does.
Tested-by: Andrew Dunstan <[email protected]>
Discussion: https://postgr.es/m/CA%2BhUKGLfOOeyZpm5ByVcAt7x5Pn-%3DxGRNCvgiUPVVzjFLtnY0w%40mail.gmail.com
(cherry picked from commit
5fc88c5d53e43fa7dcea93499d230a0bf70f4f77)
Author: Thomas Munro <
[email protected]>
Author: Alexandra Wang <
[email protected]>
Thomas Munro [Tue, 25 Oct 2022 02:20:00 +0000 (15:20 +1300)]
Fix lstat() for broken junction points on Windows.
When using junction points to emulate symlinks on Windows, one edge case
was not handled correctly by commit
c5cb8f3b: if a junction point is
broken (pointing to a non-existent path), we'd report ENOENT. This
doesn't break any known use case, but was noticed while developing a
test suite for these functions and is fixed here for completeness.
Also add translation ERROR_CANT_RESOLVE_FILENAME -> ENOENT, as that is
one of the errors Windows can report for some kinds of broken paths.
Discussion: https://postgr.es/m/CA%2BhUKG%2BajSQ_8eu2AogTncOnZ5me2D-Cn66iN_-wZnRjLN%2Bicg%40mail.gmail.com
(cherry picked from commit
387803d81d6256fcb60b9192bb5b00042442b4e3)
Author: Thomas Munro <
[email protected]>
Author: Alexandra Wang <
[email protected]>
Thomas Munro [Sat, 6 Aug 2022 00:00:57 +0000 (12:00 +1200)]
Provide lstat() for Windows.
Junction points will be reported with S_ISLNK(x.st_mode), simulating
POSIX lstat(). stat() will follow pseudo-symlinks, like in POSIX (but
only one level before giving up, unlike in POSIX).
This completes a TODO left by commit
bed90759fcb.
Tested-by: Andrew Dunstan <[email protected]> (earlier version)
Discussion: https://postgr.es/m/CA%2BhUKGLfOOeyZpm5ByVcAt7x5Pn-%3DxGRNCvgiUPVVzjFLtnY0w%40mail.gmail.com
(cherry picked from commit
c5cb8f3b770c043509b61528664bcd805e1777e6)
Author: Thomas Munro <
[email protected]>
Author: Alexandra Wang <
[email protected]>
Thomas Munro [Sat, 6 Aug 2022 00:01:42 +0000 (12:01 +1200)]
Make unlink() work for junction points on Windows.
To support harmonization of Windows and Unix code, teach our unlink()
wrapper that junction points need to be unlinked with rmdir() on
Windows.
Tested-by: Andrew Dunstan <[email protected]>
Discussion: https://postgr.es/m/CA%2BhUKGLfOOeyZpm5ByVcAt7x5Pn-%3DxGRNCvgiUPVVzjFLtnY0w%40mail.gmail.com
(cherry picked from commit
f357233c9db8be2a015163da8e1ab0630f444340)
Author: Thomas Munro <
[email protected]>
Author: Alexandra Wang <
[email protected]>
Thomas Munro [Tue, 11 Jan 2022 21:11:50 +0000 (10:11 +1300)]
Add missing include guard to win32ntdll.h.
Oversight in commit
e2f0f8ed. Also add this file to the exclusion lists
in headerscheck and cpluscpluscheck, because Unix systems don't have a
header it includes.
Reported-by: Tom Lane <[email protected]>
Discussion: https://postgr.es/m/
2760528.
1641929756%40sss.pgh.pa.us
(cherry picked from commit
af9e6331aeba149c93052c3549140082a85a3cf9)
Author: Thomas Munro <
[email protected]>
Author: Alexandra Wang <
[email protected]>
Thomas Munro [Fri, 10 Dec 2021 03:13:14 +0000 (16:13 +1300)]
Check for STATUS_DELETE_PENDING on Windows.
1. Update our open() wrapper to check for NT's STATUS_DELETE_PENDING
and translate it to Unix-like errors. This is done with
RtlGetLastNtStatus(), which is dynamically loaded from ntdll. A new
file win32ntdll.c centralizes lookup of NT functions, in case we decide
to add more in the future.
2. Remove non-working code that was trying to do something similar for
stat(), and just reuse the open() wrapper code. As a side effect,
stat() also gains resilience against "sharing violation" errors.
3. Since stat() is used very early in process startup, remove the
requirement that the Win32 signal event has been created before
pgwin32_open_handle() is reached. Instead, teach pg_usleep() to fall
back to a non-interruptible sleep if reached before the signal event is
available.
This could be back-patched, but for now it's in master only. The
problem has apparently been with us for a long time and generated only a
few complaints. Proposed patches trigger it more often, which led to
this investigation and fix.
Reviewed-by: Andres Freund <[email protected]>
Reviewed-by: Alexander Lakhin <[email protected]>
Reviewed-by: Juan José Santamaría Flecha <[email protected]>
Discussion: https://postgr.es/m/CA%2BhUKGJz_pZTF9mckn6XgSv69%2BjGwdgLkxZ6b3NWGLBCVjqUZA%40mail.gmail.com
(cherry picked from commit
e2f0f8ed251d02c1eda79e1ca3cb3db2681e7a86)
Author: Thomas Munro <
[email protected]>
Author: Alexandra Wang <
[email protected]>
Álvaro Herrera [Thu, 7 Nov 2024 13:06:24 +0000 (14:06 +0100)]
doc: Reword ALTER TABLE ATTACH restriction on NO INHERIT constraints
The previous wording is easy to read incorrectly; this change makes it
simpler, less ambiguous, and less prominent.
Backpatch to all live branches.
Reviewed-by: Amit Langote <[email protected]>
Discussion: https://postgr.es/m/
202411051201[email protected]
Thomas Munro [Wed, 6 Nov 2024 09:04:44 +0000 (22:04 +1300)]
Monkey-patch LLVM code to fix ARM relocation bug.
Supply a new memory manager for RuntimeDyld, to avoid crashes in
generated code caused by memory placement that can overflow a 32 bit
data type. This is a drop-in replacement for the
llvm::SectionMemoryManager class in the LLVM library, with Michael
Smith's proposed fix from
https://www.github.com/llvm/llvm-project/pull/71968.
We hereby slurp it into our own source tree, after moving into a new
namespace llvm::backport and making some minor adjustments so that it
can be compiled with older LLVM versions as far back as 12. It's harder
to make it work on even older LLVM versions, but it doesn't seem likely
that people are really using them so that is not investigated for now.
The problem could also be addressed by switching to JITLink instead of
RuntimeDyld, and that is the LLVM project's recommended solution as
the latter is about to be deprecated. We'll have to do that soon enough
anyway, and then when the LLVM version support window advances far
enough in a few years we'll be able to delete this code. Unfortunately
that wouldn't be enough for PostgreSQL today: in most relevant versions
of LLVM, JITLink is missing or incomplete.
Several other projects have already back-ported this fix into their fork
of LLVM, which is a vote of confidence despite the lack of commit into
LLVM as of today. We don't have our own copy of LLVM so we can't do
exactly what they've done; instead we have a copy of the whole patched
class so we can pass an instance of it to RuntimeDyld.
The LLVM project hasn't chosen to commit the fix yet, and even if it
did, it wouldn't be back-ported into the releases of LLVM that most of
our users care about, so there is not much point in waiting any longer
for that. If they make further changes and commit it to LLVM 19 or 20,
we'll still need this for older versions, but we may want to
resynchronize our copy and update some comments.
The changes that we've had to make to our copy can be seen by diffing
our SectionMemoryManager.{h,cpp} files against the ones in the tree of
the pull request. Per the LLVM project's license requirements, a copy
is in SectionMemoryManager.LICENSE.
This should fix the spate of crash reports we've been receiving lately
from users on large memory ARM systems.
Back-patch to all supported releases.
Co-authored-by: Thomas Munro <[email protected]>
Co-authored-by: Anthonin Bonnefoy <[email protected]>
Reviewed-by: Anthonin Bonnefoy <[email protected]>
Reviewed-by: Daniel Gustafsson <[email protected]> (license aspects)
Reported-by: Anthonin Bonnefoy <[email protected]>
Discussion: https://postgr.es/m/CAO6_Xqr63qj%3DSx7HY6ZiiQ6R_JbX%2B-p6sTPwDYwTWZjUmjsYBg%40mail.gmail.com
Noah Misch [Sun, 3 Nov 2024 02:42:52 +0000 (19:42 -0700)]
Suppress new "may be used uninitialized" warning.
Buildfarm member mamba fails to deduce that the function never uses this
variable without initializing it. Back-patch to v12, like commit
b412f402d1e020c5dac94f3bf4a005db69519b99.
Noah Misch [Sat, 2 Nov 2024 16:04:55 +0000 (09:04 -0700)]
Move I/O before the index_update_stats() buffer lock region.
Commit
a07e03fd8fa7daf4d1356f7cb501ffe784ea6257 enlarged the work done
here under the pg_class heap buffer lock. Two preexisting actions are
best done before holding that lock. Both RelationGetNumberOfBlocks()
and visibilitymap_count() do I/O, and the latter might exclusive-lock a
visibility map buffer. Moving these reduces contention and risk of
undetected LWLock deadlock. Back-patch to v12, like that commit.
Discussion: https://postgr.es/m/
20241031200139[email protected]
Noah Misch [Sat, 2 Nov 2024 16:05:00 +0000 (09:05 -0700)]
Revert "For inplace update, send nontransactional invalidations."
This reverts commit
95c5acb3fc261067ab65ddc0b2dca8e162f09442 (v17) and
counterparts in each other non-master branch. If released, that commit
would have caused a worst-in-years minor release regression, via
undetected LWLock self-deadlock. This commit and its self-deadlock fix
warrant more bake time in the master branch.
Reported by Alexander Lakhin.
Discussion: https://postgr.es/m/
10ec0bc3-5933-1189-6bb8-
5dec4114558e@gmail.com
Noah Misch [Sat, 2 Nov 2024 16:04:59 +0000 (09:04 -0700)]
Revert "WAL-log inplace update before revealing it to other sessions."
This reverts commit
bfd5c6e279c8e1702eea882439dc7ebdf4d4b3a5 (v17) and
counterparts in each other non-master branch. This unblocks reverting a
commit on which it depends.
Discussion: https://postgr.es/m/
10ec0bc3-5933-1189-6bb8-
5dec4114558e@gmail.com
Bruce Momjian [Fri, 1 Nov 2024 17:54:27 +0000 (13:54 -0400)]
doc: fix ALTER DOMAIN domain_constraint to spell out options
It used to refer to CREATE DOMAIN, but CREATE DOMAIN allows NULL, while
ALTER DOMAIN does not.
Reported-by: [email protected]
Discussion: https://postgr.es/m/
172225092461.915373.
6103973717483380183@wrigleys.postgresql.org
Backpatch-through: 12
Bruce Momjian [Fri, 1 Nov 2024 15:30:53 +0000 (11:30 -0400)]
doc: remove mention of ActiveState for Perl and Tcl on Windows
Replace with Strawberry Perl and Magicsplat Tcl.
Reported-by: Yasir Hussain
Discussion: https://postgr.es/m/CAA9OW9fAAM_WDYYpAquqF6j1hmfRMzHPsFkRfP5E6oSfkF=dMA@mail.gmail.com
Backpatch-through: 12
Noah Misch [Tue, 29 Oct 2024 16:39:55 +0000 (09:39 -0700)]
Unpin buffer before inplace update waits for an XID to end.
Commit
a07e03fd8fa7daf4d1356f7cb501ffe784ea6257 changed inplace updates
to wait for heap_update() commands like GRANT TABLE and GRANT DATABASE.
By keeping the pin during that wait, a sequence of autovacuum workers
and an uncommitted GRANT starved one foreground LockBufferForCleanup()
for six minutes, on buildfarm member sarus. Prevent, at the cost of a
bit of complexity. Back-patch to v12, like the earlier commit. That
commit and heap_inplace_lock() have not yet appeared in any release.
Discussion: https://postgr.es/m/
20241026184936[email protected]
Tom Lane [Tue, 29 Oct 2024 15:49:38 +0000 (11:49 -0400)]
Update time zone data files to tzdata release 2024b.
Historical corrections for Mexico, Mongolia, and Portugal.
Notably, Asia/Choibalsan is now an alias for Asia/Ulaanbaatar
rather than being a separate zone, mainly because the differences
between those zones were found to be based on untrustworthy data.
Michael Paquier [Tue, 29 Oct 2024 06:35:21 +0000 (15:35 +0900)]
doc: Add better description for rewrite functions in event triggers
There are two functions that can be used in event triggers to get more
details about a rewrite happening on a relation. Both had a limited
documentation:
- pg_event_trigger_table_rewrite_reason() and
pg_event_trigger_table_rewrite_oid() were not mentioned in the main
event trigger section in the paragraph dedicated to the event
table_rewrite.
- pg_event_trigger_table_rewrite_reason() returns an integer which is a
bitmap of the reasons why a rewrite happens. There was no explanation
about the meaning of these values, forcing the reader to look at the
code to find out that these are defined in event_trigger.h.
While on it, let's add a comment in event_trigger.h where the
AT_REWRITE_* are defined, telling to update the documentation when
these values are changed.
Backpatch down to 13 as a consequence of
1ad23335f36b, where this area
of the documentation has been heavily reworked.
Author: Greg Sabino Mullane
Discussion: https://postgr.es/m/CAKAnmmL+Z6j-C8dAx1tVrnBmZJu+BSoc68WSg3sR+CVNjBCqbw@mail.gmail.com
Backpatch-through: 13
David Rowley [Tue, 29 Oct 2024 03:25:51 +0000 (16:25 +1300)]
Doc: clarify enable_indexscan=off also disabled Index Only Scans
Disabling enable_indexscan has always also disabled Index Only Scans.
Here we make that more clear in the documentation in an attempt to
prevent future complaints complaining about this expected behavior.
Reported-by: Melanie Plageman
Author: David G. Johnston, David Rowley
Backpatch-through: 12, oldest supported version
Discussion: https://postgr.es/m/CAAKRu_atV=kovgpaLREyG68PB5+ncKvJ2UNoeRetEgyC3Yb5Sw@mail.gmail.com
Tom Lane [Mon, 28 Oct 2024 18:33:55 +0000 (14:33 -0400)]
Guard against enormously long input in pg_saslprep().
Coverity complained that pg_saslprep() could suffer integer overflow,
leading to under-allocation of the output buffer, if the input string
exceeds SIZE_MAX/4. This hazard seems largely hypothetical, but it's
easy enough to defend against, so let's do so.
This patch creates a third place in src/common/ where we are locally
defining MaxAllocSize so that we can test against that in the same way
in backend and frontend compiles. That seems like about two places
too many, so the next patch will move that into common/fe_memutils.h.
I'm hesitant to do that in back branches however.
Back-patch to v14. The code looks similar in older branches, but
before commit
67a472d71 there was a separate test on the input string
length that prevented this hazard.
Per Coverity report.
Heikki Linnakangas [Mon, 28 Oct 2024 12:07:38 +0000 (14:07 +0200)]
Fix overflow in bsearch_arg() with more than INT_MAX elements
This was introduced in commit
bfa2cee784, which replaced the old
bsearch_cmp() function we had in extended_stats.c with the current
implementation. The original discussion or commit message of
bfa2cee784 didn't mention where the new implementation came from, but
based on some googling, I'm guessing *BSD or libiberty, all of which
share this same code, with or without this fix.
Author: Ranier Vilela
Reviewed-by: Nathan Bossart
Backpatch-through: 14
Discussion: https://www.postgresql.org/message-id/CAEudQAp34o_8u6sGSVraLwuMv9F7T9hyHpePXHmRaxR2Aboi%2Bw%40mail.gmail.com
Noah Misch [Fri, 25 Oct 2024 13:51:03 +0000 (06:51 -0700)]
WAL-log inplace update before revealing it to other sessions.
A buffer lock won't stop a reader having already checked tuple
visibility. If a vac_update_datfrozenid() and then a crash happened
during inplace update of a relfrozenxid value, datfrozenxid could
overtake relfrozenxid. That could lead to "could not access status of
transaction" errors. Back-patch to v12 (all supported versions). In
v14 and earlier, this also back-patches the assertion removal from
commit
7fcf2faf9c7dd473208fd6d5565f88d7f733782b.
Discussion: https://postgr.es/m/
20240620012908[email protected]
Noah Misch [Fri, 25 Oct 2024 13:51:02 +0000 (06:51 -0700)]
For inplace update, send nontransactional invalidations.
The inplace update survives ROLLBACK. The inval didn't, so another
backend's DDL could then update the row without incorporating the
inplace update. In the test this fixes, a mix of CREATE INDEX and ALTER
TABLE resulted in a table with an index, yet relhasindex=f. That is a
source of index corruption. Back-patch to v12 (all supported versions).
The back branch versions don't change WAL, because those branches just
added end-of-recovery SIResetAll(). All branches change the ABI of
extern function PrepareToInvalidateCacheTuple(). No PGXN extension
calls that, and there's no apparent use case in extensions.
Reviewed by Nitin Motiani and (in earlier versions) Andres Freund.
Discussion: https://postgr.es/m/
20240523000548[email protected]
Noah Misch [Fri, 25 Oct 2024 13:51:06 +0000 (06:51 -0700)]
At end of recovery, reset all sinval-managed caches.
An inplace update's invalidation messages are part of its transaction's
commit record. However, the update survives even if its transaction
aborts or we stop recovery before replaying its transaction commit.
After recovery, a backend that started in recovery could update the row
without incorporating the inplace update. That could result in a table
with an index, yet relhasindex=f. That is a source of index corruption.
This bulk invalidation avoids the functional consequences. A future
change can fix the !RecoveryInProgress() scenario without changing the
WAL format. Back-patch to v17 - v12 (all supported versions). v18 will
instead add invalidations to WAL.
Discussion: https://postgr.es/m/
20240618152349[email protected]
Noah Misch [Thu, 24 Oct 2024 16:16:14 +0000 (09:16 -0700)]
Stop reading uninitialized memory in heap_inplace_lock().
Stop computing a never-used value. This removes the read; the read had
no functional implications. Back-patch to v12, like commit
a07e03fd8fa7daf4d1356f7cb501ffe784ea6257.
Reported by Alexander Lakhin.
Discussion: https://postgr.es/m/
6c92f59b-f5bc-e58c-9bdd-
d1f21c17c786@gmail.com
Amit Langote [Wed, 23 Oct 2024 08:54:48 +0000 (17:54 +0900)]
Remove unnecessary word in a comment
Relations opened by the executor are only closed once in
ExecCloseRangeTableRelations(), so the word "again" in the comment
for ExecGetRangeTableRelation() is misleading and unnecessary.
Discussion: https://postgr.es/m/CA+HiwqHnw-zR+u060i3jp4ky5UR0CjByRFQz50oZ05de7wUg=Q@mail.gmail.com
Backpatch-through: 12
Michael Paquier [Tue, 22 Oct 2024 23:35:05 +0000 (08:35 +0900)]
ecpg: Fix out-of-bound read in DecodeDateTime()
It was possible for the code to read out-of-bound data from the
"day_tab" table with some crafted input data. Let's treat these as
invalid input as the month number is incorrect.
A test is added to test this case with a check on the errno returned by
the decoding routine. A test close to the new one added in this commit
was testing for a failure, but did not look at the errno generated, so
let's use this commit to also change it, adding a check on the errno
returned by DecodeDateTime().
Like the other test scripts, dt_test should likely be expanded to
include more checks based on the errnos generated in these code paths.
This is left as future work.
This issue exists since
2e6f97560a83, so backpatch all the way down.
Reported-by: Pavel Nekrasov
Author: Bruce Momjian, Pavel Nekrasov
Discussion: https://postgr.es/m/18614-
6bbe00117352309e@postgresql.org
Backpatch-through: 12
Álvaro Herrera [Tue, 22 Oct 2024 14:01:18 +0000 (16:01 +0200)]
Restructure foreign key handling code for ATTACH/DETACH
... to fix bugs when the referenced table is partitioned.
The catalog representation we chose for foreign keys connecting
partitioned tables (in commit
f56f8f8da6af) is inconvenient, in the
sense that a standalone table has a different way to represent the
constraint when referencing a partitioned table, than when the same
table becomes a partition (and vice versa). Because of this, we need to
create additional catalog rows on detach (pg_constraint and pg_trigger),
and remove them on attach. We were doing some of those things, but not
all of them, leading to missing catalog rows in certain cases.
The worst problem seems to be that we are missing action triggers after
detaching a partition, which means that you could update/delete rows
from the referenced partitioned table that still had referencing rows on
that table, the server failing to throw the required errors.
!!!
Note that this means existing databases with FKs that reference
partitioned tables might have rows that break relational integrity, on
tables that were once partitions on the referencing side of the FK.
Another possible problem is that trying to reattach a table
that had been detached would fail indicating that internal triggers
cannot be found, which from the user's point of view is nonsensical.
In branches 15 and above, we fix this by creating a new helper function
addFkConstraint() which is in charge of creating a standalone
pg_constraint row, and repurposing addFkRecurseReferencing() and
addFkRecurseReferenced() so that they're only the recursive routine for
each side of the FK, and they call addFkConstraint() to create
pg_constraint at each partitioning level and add the necessary triggers.
These new routines can be used during partition creation, partition
attach and detach, and foreign key creation. This reduces redundant
code and simplifies the flow.
In branches 14 and 13, we have a much simpler fix that consists on
simply removing the constraint on detach. The reason is that those
branches are missing commit
f4566345cf40, which reworked the way this
works in a way that we didn't consider back-patchable at the time.
We opted to leave branch 12 alone, because it's different from branch 13
enough that the fix doesn't apply; and because it is going in EOL mode
very soon, patching it now might be worse since there's no way to undo
the damage if it goes wrong.
Existing databases might need to be repaired.
In the future we might want to rethink the catalog representation to
avoid this problem, but for now the code seems to do what's required to
make the constraints operate correctly.
Co-authored-by: Jehan-Guillaume de Rorthais <[email protected]>
Co-authored-by: Tender Wang <[email protected]>
Co-authored-by: Alvaro Herrera <[email protected]>
Reported-by: Guillaume Lelarge <[email protected]>
Reported-by: Jehan-Guillaume de Rorthais <[email protected]>
Reported-by: Thomas Baehler (SBB CFF FFS) <[email protected]>
Discussion: https://postgr.es/m/
20230420144344.
40744130@karst
Discussion: https://postgr.es/m/
20230705233028.
2f554f73@karst
Discussion: https://postgr.es/m/GVAP278MB02787E7134FD691861635A8BC9032@GVAP278MB0278.CHEP278.PROD.OUTLOOK.COM
Discussion: https://postgr.es/m/18541-
628a61bc267cd2d3@postgresql.org
Tom Lane [Mon, 21 Oct 2024 19:08:22 +0000 (15:08 -0400)]
Fix wrong assertion and poor error messages in "COPY (query) TO".
If the query is rewritten into a NOTIFY command by a DO INSTEAD
rule, we'd get an assertion failure, or in non-assert builds
issue a rather confusing error message. Improve that.
Also fix a longstanding grammar mistake in a nearby error message.
Per bug #18664 from Alexander Lakhin. Back-patch to all supported
branches.
Tender Wang and Tom Lane
Discussion: https://postgr.es/m/18664-
ffd0ebc2386598df@postgresql.org
Heikki Linnakangas [Mon, 21 Oct 2024 06:49:21 +0000 (09:49 +0300)]
Fix race condition in committing a serializable transaction
The finished transaction list can contain XIDs that are older than the
serializable global xmin. It's a short-lived state;
ClearOldPredicateLocks() removes any such transactions from the list,
and it's called whenever the global xmin advances. But if another
backend calls SummarizeOldestCommittedSxact() in that window, it will
call SerialAdd() on an XID that's older than the global xmin, or if
there are no more transactions running, when global xmin is
invalid. That trips the assertion in SerialAdd().
Fixes bug #18658 reported by Andrew Bille. Thanks to Alexander Lakhin
for analysis. Backpatch to all versions.
Discussion: https://www.postgresql.org/message-id/18658-
7dab125ec688c70b%40postgresql.org
Álvaro Herrera [Sun, 20 Oct 2024 13:36:20 +0000 (15:36 +0200)]
Note that index_name in ALTER INDEX ATTACH PARTITION can be schema-qualified
Missed in
8b08f7d4820f; backpatch to all supported branches.
Reported-by: [email protected]
Reviewed-by: Tom Lane <[email protected]>
Discussion: https://postgr.es/m/
172924785099.698.
15236991344616673753@wrigleys.postgresql.org
Thomas Munro [Thu, 17 Oct 2024 02:52:24 +0000 (15:52 +1300)]
Fix extreme skew detection in Parallel Hash Join.
After repartitioning the inner side of a hash join that would have
exceeded the allowed size, we check if all the tuples from a parent
partition moved to one child partition. That is evidence that it
contains duplicate keys and later attempts to repartition will also
fail, so we should give up trying to limit memory (for lack of a better
fallback strategy).
A thinko prevented the check from working correctly in partition 0 (the
one that is partially loaded into memory already). After
repartitioning, we should check for extreme skew if the *parent*
partition's space_exhausted flag was set, not the child partition's.
The consequence was repeated futile repartitioning until per-partition
data exceeded various limits including "ERROR: invalid DSA memory alloc
request size
1811939328", OS allocation failure, or temporary disk space
errors. (We could also do something about some of those symptoms, but
that's material for separate patches.)
This problem only became likely when PostgreSQL 16 introduced support
for Parallel Hash Right/Full Join, allowing NULL keys into the hash
table. Repartitioning always leaves NULL in partition 0, no matter how
many times you do it, because the hash value is all zero bits. That's
unlikely for other hashed values, but they might still have caused
wasted extra effort before giving up.
Back-patch to all supported releases.
Reported-by: Craig Milhiser <[email protected]>
Reviewed-by: Andrei Lepikhov <[email protected]>
Discussion: https://postgr.es/m/CA%2BwnhO1OfgXbmXgC4fv_uu%3DOxcDQuHvfoQ4k0DFeB0Qqd-X-rQ%40mail.gmail.com
Tom Lane [Wed, 16 Oct 2024 21:36:30 +0000 (17:36 -0400)]
Further refine _SPI_execute_plan's rule for atomic execution.
Commit
2dc1deaea turns out to have been still a brick shy of a load,
because CALL statements executing within a plpgsql exception block
could still pass the wrong snapshot to stable functions within the
CALL's argument list. That happened because standard_ProcessUtility
forces isAtomicContext to true if IsTransactionBlock is true, which
it always will be inside a subtransaction. Then ExecuteCallStmt
would think it does not need to push a new snapshot --- but
_SPI_execute_plan didn't do so either, since it thought it was in
nonatomic mode.
The best fix for this seems to be for _SPI_execute_plan to operate
in atomic execution mode if IsSubTransaction() is true, even when the
SPI context as a whole is non-atomic. This makes _SPI_execute_plan
have the same rules about when non-atomic execution is allowed as
_SPI_commit/_SPI_rollback have about when COMMIT/ROLLBACK are allowed,
which seems appropriately symmetric. (If anyone ever tries to allow
COMMIT/ROLLBACK inside a subtransaction, this would all need to be
rethought ... but I'm unconvinced that such a thing could be logically
consistent at all.)
For further consistency, also check IsSubTransaction() in
SPI_inside_nonatomic_context. That does not matter for its
one present-day caller StartTransaction, which can't be reached
inside a subtransaction. But if any other callers ever arise,
they'd presumably want this definition.
Per bug #18656 from Alexander Alehin. Back-patch to all
supported branches, like previous fixes in this area.
Discussion: https://postgr.es/m/18656-
cade1780866ef66c@postgresql.org
Masahiko Sawada [Wed, 16 Oct 2024 19:07:55 +0000 (12:07 -0700)]
Reduce memory block size for decoded tuple storage to 8kB.
Commit
a4ccc1cef introduced the Generation Context and modified the
logical decoding process to use a Generation Context with a fixed
block size of 8MB for storing tuple data decoded during logical
decoding (i.e., rb->tup_context). Several reports have indicated that
the logical decoding process can be terminated due to
out-of-memory (OOM) situations caused by excessive memory usage in
rb->tup_context.
This issue can occur when decoding a workload involving several
concurrent transactions, including a long-running transaction that
modifies tuples. By design, the Generation Context does not free a
memory block until all chunks within that block are
released. Consequently, if tuples modified by the long-running
transaction are stored across multiple memory blocks, these blocks
remain allocated until the long-running transaction completes, leading
to substantial memory fragmentation. The memory usage during logical
decoding, tracked by rb->size, does not account for memory
fragmentation, resulting in potentially much higher memory consumption
than the value of the logical_decoding_work_mem parameter.
Various improvement strategies were discussed in the relevant
thread. This change reduces the block size of the Generation Context
used in rb->tup_context from 8MB to 8kB. This modification
significantly decreases the likelihood of substantial memory
fragmentation occurring and is relatively straightforward to
backport. Performance testing across multiple platforms has confirmed
that this change will not introduce any performance degradation that
would impact actual operation.
Backport to all supported branches.
Reported-by: Alex Richman, Michael Guissine, Avi Weinberg
Reviewed-by: Amit Kapila, Fujii Masao, David Rowley
Tested-by: Hayato Kuroda, Shlok Kyal
Discussion: https://postgr.es/m/CAD21AoBTY1LATZUmvSXEssvq07qDZufV4AF-OHh9VD2pC0VY2A%40mail.gmail.com
Backpatch-through: 12
Tom Lane [Sat, 12 Oct 2024 18:56:08 +0000 (14:56 -0400)]
Correctly identify which EC members are computable at a plan node.
find_computable_ec_member() had the wrong mental model of what
its primary caller prepare_sort_from_pathkeys() would do with
the selected EquivalenceClass member expression. We will not
compute the EC expression in a plan node atop the one returning
the passed-in targetlist; rather, the EC expression will be
computed as an additional column of that targetlist. So any
Var or quasi-Var used in the given tlist is also available to the
EC expression. In simple cases this makes no difference because
the given tlist is just a list of Vars or quasi-Vars --- but if
we are considering an appendrel member produced by flattening
a UNION ALL, the tlist may contain expressions, resulting in
failure to match and a "could not find pathkey item to sort"
error.
To fix, we can flatten both the tlist and the EC members with
pull_var_clause(), and then just check for subset-ness, so
that the code is actually shorter than before.
While this bug is quite old, the present patch only works back to
v13. We could possibly make it work in v12 by back-patching parts
of
375398244. On the whole though I don't like the risk/reward
ratio of that idea. v12's final release is next month, meaning
there would be no chance to correct matters if the patch causes a
regression. Since this failure has escaped notice for 14 years,
it's likely nobody will hit it in the field with v12.
Per bug #18652 from Alexander Lakhin.
Andrei Lepikhov and Tom Lane
Discussion: https://postgr.es/m/18652-
deaa782ebcca85d1@postgresql.org
Daniel Gustafsson [Wed, 9 Oct 2024 07:34:34 +0000 (09:34 +0200)]
Remove incorrect function import from pgindent
Commit
149ac7d4559 which re-implemented pgindent in Perl explicitly
imported the devnull function from File::Spec, but the module does
not export anything. In recent versions of Perl calling a missing
import function cause a warning, which combined with warnings being
fatal cause pgindent to error out.
Backpatch to all supported versions.
Author: Erik Wienhold <
[email protected]>
Reviewed-by: Andrew Dunstan <[email protected]>
Reviewed-by: Daniel Gustafsson <[email protected]>
Discusson: https://postgr.es/m/
2372cd74-11b0-46f9-b28e-
8f9627215d19@ewie.name
Backpatch-through: v12
Amit Kapila [Tue, 8 Oct 2024 05:31:53 +0000 (11:01 +0530)]
Stabilize the test added by commit
022564f60c.
The test was unstable in branches 14 and 15 as we were relying on the
number of changes in the table having a toast column to start streaming.
On branches >= 16, we have a GUC debug_logical_replication_streaming which
can stream each change, so the test was stable in those branches.
Change the test to use PREPARE TRANSACTION as that should make the result
consistent and test the code changed in
022564f60c.
Reported-by: Daniel Gustafsson as per buildfarm
Author: Hou Zhijie, Amit Kapila
Backpatch-through: 14
Discussion: https://postgr.es/m/
8C2F86AA-981E-4803-B14D-
E264C0255330@yesql.se
Nathan Bossart [Mon, 7 Oct 2024 21:49:20 +0000 (16:49 -0500)]
vacuumdb: Schema-qualify operator in catalog query's WHERE clause.
Commit
1ab67c9dfa, which modified this catalog query so that it
doesn't return temporary relations, forgot to schema-qualify the
operator. A comment earlier in the function implores us to fully
qualify everything in the query:
* Since we execute the constructed query with the default search_path
* (which could be unsafe), everything in this query MUST be fully
* qualified.
This commit fixes that. While at it, add a newline for consistency
with surrounding code.
Reviewed-by: Noah Misch
Discussion: https://postgr.es/m/ZwQJYcuPPUsF0reU%40nathan
Backpatch-through: 12
Nathan Bossart [Mon, 7 Oct 2024 18:51:03 +0000 (13:51 -0500)]
Fix Y2038 issues with MyStartTime.
Several places treat MyStartTime as a "long", which is only 32 bits
wide on some platforms. In reality, MyStartTime is a pg_time_t,
i.e., a signed 64-bit integer. This will lead to interesting bugs
on the aforementioned systems in 2038 when signed 32-bit integers
are no longer sufficient to store Unix time (e.g., "pg_ctl start"
hanging). To fix, ensure that MyStartTime is handled as a 64-bit
value everywhere. (Of course, users will need to ensure that
time_t is 64 bits wide on their system, too.)
Co-authored-by: Max Johnson
Discussion: https://postgr.es/m/CO1PR07MB905262E8AC270FAAACED66008D682%40CO1PR07MB9052.namprd07.prod.outlook.com
Backpatch-through: 12
Amit Kapila [Mon, 7 Oct 2024 09:15:39 +0000 (14:45 +0530)]
Fix fetching default toast value during decoding of in-progress transactions.
During logical decoding of in-progress transactions, we perform the toast
table scan while fetching the default toast value for an attribute. We
forgot to initialize the flag during this scan to indicate that the system
table scan is in progress. We need this flag to ensure that during logical
decoding we never directly access the tableam or heap APIs because we check
for concurrent aborts only in systable_* APIs.
Reported-by: Alexander Lakhin
Author: Takeshi Ideriha, Hou Zhijie
Reviewed-by: Amit Kapila, Hou Zhijie
Backpatch-through: 14
Discussion: https://postgr.es/m/18641-
6687273b7f15269d@postgresql.org
Tom Lane [Sun, 6 Oct 2024 20:03:48 +0000 (16:03 -0400)]
Ignore not-yet-defined Portals in pg_cursors view.
pg_cursor() supposed that any Portal it finds in the hash table must
have sourceText set up, but there's an edge case where that is not so.
A newly-created Portal has sourceText = NULL, and that doesn't change
until PortalDefineQuery is called. In SPI_cursor_open_internal,
we perform GetCachedPlan between CreatePortal and PortalDefineQuery,
and it's possible for user-defined code to execute during that
planning and cause a fetch from the pg_cursors view, resulting in a
null-pointer-dereference crash. (It looks like the same could happen
in exec_bind_message, but I've not tried to provoke a failure there.)
I considered trying to fix this by setting sourceText sooner, but
there may be instances of this same calling pattern in extensions,
and we couldn't be sure they'd get the memo promptly. It seems
better to redefine pg_cursor as not showing Portals that have
not yet had PortalDefineQuery called on them, which we can do by
just skipping them if sourceText is still NULL.
(Before
a1c692358, pg_cursor would instead return a row with NULL
in the statement column. We could revert to that behavior but it
doesn't really seem like a better definition, especially since our
documentation doesn't suggest that the column could be NULL.)
Per report from PetSerAl. Back-patch to all supported branches.
Discussion: https://postgr.es/m/CAKygsHTBXLXjwV43kpZa+Cs+XTiaeeJiZdL4cPBm9f4MTdw7wg@mail.gmail.com
Tom Lane [Wed, 2 Oct 2024 21:30:36 +0000 (17:30 -0400)]
Parse libpq's "keepalives" option more like other integer options.
Use pqParseIntParam (nee parse_int_param) instead of using strtol
directly. This allows trailing whitespace, which the previous coding
didn't, and makes the spelling of the error message consistent with
other similar cases.
This seems to be an oversight in commit
e7a221797, which introduced
parse_int_param. That fixed places that were using atoi(), but missed
this place which was randomly using strtol() instead.
Ordinarily I'd consider this minor cleanup not worth back-patching.
However, it seems that ecpg assumes it can add trailing whitespace
to URL parameters, so that use of the keepalives option fails in
that context. Perhaps that's worth improving as a separate matter.
In the meantime, back-patch this to all supported branches.
Yuto Sasaki (some further cleanup by me)
Discussion: https://postgr.es/m/TY2PR01MB36286A7B97B9A15793335D18C1772@TY2PR01MB3628.jpnprd01.prod.outlook.com
Michael Paquier [Tue, 1 Oct 2024 06:44:12 +0000 (15:44 +0900)]
Fix race condition in COMMIT PREPARED causing orphaned 2PC files
COMMIT PREPARED removes on-disk 2PC files near its end, but the state
checked if a file is on-disk or not gets read from shared memory while
not holding the two-phase state lock.
Because of that, there was a small window where a second backend doing a
PREPARE TRANSACTION could reuse the GlobalTransaction put back into the
2PC free list by the COMMIT PREPARED, overwriting the "ondisk" flag read
afterwards by the COMMIT PREPARED to decide if its on-disk two-phase
state file should be removed, preventing the file deletion.
This commit fixes this issue so as the "ondisk" flag in the
GlobalTransaction is read while holding the two-phase state lock, not
from shared memory after its entry has been added to the free list.
Orphaned two-phase state files flushed to disk after a checkpoint are
discarded at the beginning of recovery. However, a truncation of
pg_xact/ would make the startup process issue a FATAL when it cannot
read the SLRU page holding the state of the transaction whose 2PC file
was orphaned, which is a necessary step to decide if the 2PC file should
be removed or not. Removing manually the file would be necessary in
this case.
Issue introduced by
effe7d9552dd, so backpatch all the way down.
Mea culpa.
Author: wuchengwen
Discussion: https://postgr.es/m/
[email protected]
Backpatch-through: 12
Tatsuo Ishii [Tue, 1 Oct 2024 02:38:17 +0000 (11:38 +0900)]
Doc: replace unnecessary non-breaking space with ordinal space.
There were unnecessary non-breaking spaces (nbsp, U+00A0, 0xc2a0 in
UTF-8) in the docs. This commit replaces them with ASCII spaces
(0x20).
config.sgml is backpatched through 17.
ref/drop_extension.sgml is backpatched through 13.
Discussion: https://postgr.es/m/
20240930.153404.
202479334310259810.ishii%40postgresql.org
Reviewed-by: Yugo Nagata, Daniel Gustafsson
Backpatch-through: 17, 13
Fujii Masao [Mon, 30 Sep 2024 02:13:55 +0000 (11:13 +0900)]
reindexdb: Skip reindexing temporary tables and indexes.
Reindexing temp tables or indexes of other sessions is not allowed.
However, reindexdb in parallel mode previously listed them as
the objects to process, leading to failures.
This commit ensures reindexdb in parallel mode skips temporary tables
and indexes by adding a condition based on the relpersistence column
in pg_class to the object listing queries, preventing these issues.
Note that this commit does not affect reindexdb when temporary tables
or indexes are explicitly specified using the -t or -j options;
reindexdb in that case still does not skip them and can cause an error.
Back-patch to v13 where parallel mode was introduced in reindexdb.
Author: Fujii Masao
Reviewed-by: Michael Paquier
Discussion: https://postgr.es/m/
5f37ee56-14fb-44fe-9150-
9eb97e10538b@oss.nttdata.com
Noah Misch [Sun, 29 Sep 2024 22:54:25 +0000 (15:54 -0700)]
Remove NULL dereference from RenameRelationInternal().
Defect in last week's commit
aac2c9b4fde889d13f859c233c2523345e72d32b,
per Coverity. Reaching this would need catalog corruption. Back-patch
to v12, like that commit.
Noah Misch [Fri, 27 Sep 2024 22:28:56 +0000 (15:28 -0700)]
Avoid 037_invalid_database.pl hang under debug_discard_caches.
Back-patch to v12 (all supported versions).
Michael Paquier [Fri, 27 Sep 2024 00:40:19 +0000 (09:40 +0900)]
Fix incorrect memory access in VACUUM FULL with invalid toast indexes
An invalid toast index is skipped in reindex_relation(). These would be
remnants of a failed REINDEX CONCURRENTLY and they should never been
rebuilt as there can only be one valid toast index at a time.
REINDEX_REL_SUPPRESS_INDEX_USE, used by CLUSTER and VACUUM FULL, needs
to maintain a list of the indexes being processed. The list of indexes
is retrieved from the relation cache, and includes invalid indexes. The
code has missed that invalid toast indexes are ignored in
reindex_relation() as this leads to a hard failure in reindex_index(),
and they were left in the reindex pending list, making the list
inconsistent when rechecked. The incorrect memory access was happening
when scanning pg_class for the refresh of pg_database.datfrozenxid, when
doing a scan of pg_class.
This issue exists since REINDEX CONCURRENTLY exists, where invalid toast
indexes can exist, so backpatch all the way down.
Reported-by: Alexander Lakhin
Author: Tender Wang
Discussion: https://postgr.es/m/18630-
9aed99c38830657d@postgresql.org
Backpatch-through: 12
Andres Freund [Wed, 5 Oct 2022 17:44:38 +0000 (10:44 -0700)]
tests: Restrict pg_locks queries in advisory_locks.sql to current database
Otherwise testing an existing installation can fail, if there are other locks,
e.g. from one of the isolation tests.
This was originally applied as
c3315a7da57b in 16~, but it is possible
to see this test fail depending on the concurrent activity for older
active branches.
Reviewed-by: Michael Paquier <[email protected]>
Discussion: https://postgr.es/m/
20221003234111[email protected]
Backpatch-through: 12
Michael Paquier [Wed, 25 Sep 2024 05:44:57 +0000 (14:44 +0900)]
vacuumdb: Skip temporary tables in query to build list of relations
Running vacuumdb with a non-superuser while another user has created a
temporary table would lead to a mid-flight permission failure,
interrupting the operation. vacuum_rel() skips temporary relations of
other backends, and it makes no sense for vacuumdb to know about these
relations, so let's switch it to ignore temporary relations entirely.
Adding a qual in the query based on relpersistence simplifies the
generation of its WHERE clause in vacuum_one_database(), per se the
removal of "has_where".
Author: VaibhaveS, Michael Paquier
Reviewed-by: Fujii Masao
Discussion: https://postgr.es/m/CAM_eQjwfAR=y3G1fGyS1U9FTmc+FyJm9amNfY2QCZBnDDbNPZg@mail.gmail.com
Backpatch-through: 12
Noah Misch [Tue, 24 Sep 2024 22:25:18 +0000 (15:25 -0700)]
For inplace update durability, make heap_update() callers wait.
The previous commit fixed some ways of losing an inplace update. It
remained possible to lose one when a backend working toward a
heap_update() copied a tuple into memory just before inplace update of
that tuple. In catalogs eligible for inplace update, use LOCKTAG_TUPLE
to govern admission to the steps of copying an old tuple, modifying it,
and issuing heap_update(). This includes MERGE commands. To avoid
changing most of the pg_class DDL, don't require LOCKTAG_TUPLE when
holding a relation lock sufficient to exclude inplace updaters.
Back-patch to v12 (all supported versions). In v13 and v12, "UPDATE
pg_class" or "UPDATE pg_database" can still lose an inplace update. The
v14+ UPDATE fix needs commit
86dc90056dfdbd9d1b891718d2e5614e3e432f35,
and it wasn't worth reimplementing that fix without such infrastructure.
Reviewed by Nitin Motiani and (in earlier versions) Heikki Linnakangas.
Discussion: https://postgr.es/m/
20231027214946[email protected]
Noah Misch [Tue, 24 Sep 2024 22:25:18 +0000 (15:25 -0700)]
Fix data loss at inplace update after heap_update().
As previously-added tests demonstrated, heap_inplace_update() could
instead update an unrelated tuple of the same catalog. It could lose
the update. Losing relhasindex=t was a source of index corruption.
Inplace-updating commands like VACUUM will now wait for heap_update()
commands like GRANT TABLE and GRANT DATABASE. That isn't ideal, but a
long-running GRANT already hurts VACUUM progress more just by keeping an
XID running. The VACUUM will behave like a DELETE or UPDATE waiting for
the uncommitted change.
For implementation details, start at the systable_inplace_update_begin()
header comment and README.tuplock. Back-patch to v12 (all supported
versions). In back branches, retain a deprecated heap_inplace_update(),
for extensions.
Reported by Smolkin Grigory. Reviewed by Nitin Motiani, (in earlier
versions) Heikki Linnakangas, and (in earlier versions) Alexander
Lakhin.
Discussion: https://postgr.es/m/CAMp+ueZQz3yDk7qg42hk6-9gxniYbp-=bG2mgqecErqR5gGGOA@mail.gmail.com
Noah Misch [Tue, 24 Sep 2024 22:25:18 +0000 (15:25 -0700)]
Warn if LOCKTAG_TUPLE is held at commit, under debug_assertions.
The current use always releases this locktag. A planned use will
continue that intent. It will involve more areas of code, making unlock
omissions easier. Warn under debug_assertions, like we do for various
resource leaks. Back-patch to v12 (all supported versions), the plan
for the commit of the new use.
Reviewed by Heikki Linnakangas.
Discussion: https://postgr.es/m/
20240512232923[email protected]
Daniel Gustafsson [Wed, 3 Apr 2024 11:33:25 +0000 (13:33 +0200)]
Drop global objects after completed test
Project policy is to not leave global objects behind after a regress
test run. This was found as a result of the development of a patch
to make pg_regress detect such leftovers automatically, which in the
end was withdrawn due to issues with parallel runs.
This was originally committed as
936e3fa3787a, but the issue also exists
in the 12~16 range.
Discussion: https://postgr.es/m/
[email protected]
Backpatch-through: 12
Tom Lane [Fri, 20 Sep 2024 19:56:34 +0000 (15:56 -0400)]
Doc: explain how to test ADMIN privilege with pg_has_role().
This has always been possible, but the syntax is a bit obscure,
and our user-facing docs were not very helpful. Spell it out
more clearly.
Per complaint from Dominique Devienne. Back-patch to
all supported branches.
Discussion: https://postgr.es/m/CAFCRh-8JNEy+dV4SXFOrWca50u+d=--TO4cq=+ac1oBtfJy4AA@mail.gmail.com
Bruce Momjian [Thu, 19 Sep 2024 22:05:21 +0000 (18:05 -0400)]
doc PG relnotes: remove warning about commit links in PDF build
Make paragraph empty instead of removing it.
Discussion: https://postgr.es/m/
2029579.
1726779139@sss.pgh.pa.us
Backpatch-through: 12
Bruce Momjian [Thu, 19 Sep 2024 16:01:59 +0000 (12:01 -0400)]
doc PG relnotes: document "Unresolved ID reference found" cause
Backpatch-through: 12
Bruce Momjian [Thu, 19 Sep 2024 13:47:22 +0000 (09:47 -0400)]
doc PG relnotes: rename commit link paragraph for clarity
FYI, during PDF builds, this link type generates a "Unresolved ID
reference found" warning because it is suppressed from the PDF output.
Backpatch-through: 12
Bruce Momjian [Thu, 19 Sep 2024 12:45:32 +0000 (08:45 -0400)]
Improve Perl script which adds commit links to release notes
Reported-by: Andrew Dunstan
Discussion: https://postgr.es/m/
b2465837-56df-4794-a0b5-
5e6ed44ed870@dunslane.net
Author: Andrew Dunstan
Backpatch-through: 12
Bruce Momjian [Wed, 18 Sep 2024 21:13:19 +0000 (17:13 -0400)]
doc PG relnotes: add paragraph explaining the section symbol
And suppress the symbol in print mode, where the section symbol does not
appear.
Discussion: https://postgr.es/m/
[email protected]
Backpatch-through: 12
Bruce Momjian [Wed, 18 Sep 2024 20:34:51 +0000 (16:34 -0400)]
doc PG relnotes: no relnote footnotes for commit links in PDF
In print output, there are too many commit links for footnotes in the
release notes to be useful.
Reported-by: Tom Lane
Discussion: https://postgr.es/m/
1709858.
1726618961@sss.pgh.pa.us
Backpatch-through: 12
Noah Misch [Wed, 18 Sep 2024 02:53:11 +0000 (19:53 -0700)]
Don't enter parallel mode when holding interrupts.
Doing so caused the leader to hang in wait_event=ParallelFinish, which
required an immediate shutdown to resolve. Back-patch to v12 (all
supported versions).
Francesco Degrassi
Discussion: https://postgr.es/m/CAC-SaSzHUKT=vZJ8MPxYdC_URPfax+yoA1hKTcF4ROz_Q6z0_Q@mail.gmail.com
Michael Paquier [Wed, 18 Sep 2024 00:59:26 +0000 (09:59 +0900)]
Add missing query ID reporting in extended query protocol
This commit adds query ID reports for two code paths when processing
extended query protocol messages:
- When receiving a bind message, setting it to the first Query retrieved
from a cached cache.
- When receiving an execute message, setting it to the first PlannedStmt
stored in a portal.
An advantage of this method is that this is able to cover all the types
of portals handled in the extended query protocol, particularly these
two when the report done in ExecutorStart() is not enough (neither is an
addition in ExecutorRun(), actually, for the second point):
- Multiple execute messages, with multiple ExecutorRun().
- Portal with execute/fetch messages, like a query with a RETURNING
clause and a fetch size that stores the tuples in a first execute
message going though ExecutorStart() and ExecuteRun(), followed by one
or more execute messages doing only fetches from the tuplestore created
in the first message. This corresponds to the case where
execute_is_fetch is set, for example.
Note that the query ID reporting done in ExecutorStart() is still
necessary, as an EXECUTE requires it. Query ID reporting is optimistic
and more calls to pgstat_report_query_id() don't matter as the first
report takes priority except if the report is forced. The comment in
ExecutorStart() is adjusted to reflect better the reality with the
extended query protocol.
The test added in pg_stat_statements is a courtesy of Robert Haas. This
uses psql's \bind metacommand, hence this part is backpatched down to
v16.
Reported-by: Kaido Vaikla, Erik Wienhold
Author: Sami Imseih
Reviewed-by: Jian He, Andrei Lepikhov, Michael Paquier
Discussion: https://postgr.es/m/CA+427g8DiW3aZ6pOpVgkPbqK97ouBdf18VLiHFesea2jUk3XoQ@mail.gmail.com
Discussion: https://postgr.es/m/CA+TgmoZxtnf_jZ=VqBSyaU8hfUkkwoJCJ6ufy4LGpXaunKrjrg@mail.gmail.com
Discussion: https://postgr.es/m/
1391613709.939460.
1684777418070@office.mailbox.org
Backpatch-through: 14