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In order to make the errorhandling code in backend libpq be thread-
safe the global variable used by the certificate verification call-
back need to be replaced with passing private data.
This moves the threadsafety needle a little but forwards, the call
to strerror_r also needs to be replaced with the error buffer made
thread local. This is left as future work for when add the thread
primitives required for this to the tree.
Author: Daniel Gustafsson <daniel@yesql.se>
Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Discussion: https://postgr.es/m/353226C7-97A1-4507-A380-36AA92983AE6@yesql.se
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Instead of having to write a semicolon inside the macro argument, we can
insert a semicolon with another macro layer. This no longer gives
pg_bsd_indent indigestion, so we can remove the digestive aids that had
to be installed in the pgindent Perl script.
Author: Álvaro Herrera <alvherre@kurilemu.de>
Reviewed-by: Andrew Dunstan <andrew@dunslane.net>
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/202511111134.njrwf5w5nbjm@alvherre.pgsql
Backpatch-through: 18
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Oversights in 7b504eb282ca (for pg_ndistinct) and 2686ee1b7ccf (for
pg_dependencies).
Reported-by: Man Zeng <zengman@halodbtech.com>
Discussion: https://postgr.es/m/176293711658.2081918.12019224686811870203.pgcf@coridan.postgresql.org
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pg_resetwal didn't accept multixid 0 or multixact offset UINT32_MAX,
but they are both valid values that can appear in the control file.
That caused pg_upgrade to fail if you tried to upgrade a cluster
exactly at multixid or offset wraparound, because pg_upgrade calls
pg_resetwal to restore multixid/offset on the new cluster to the
values from the old cluster. To fix, allow those values in
pg_resetwal.
Fixes bugs #18863 and #18865 reported by Dmitry Kovalenko.
Backpatch down to v15. Version 14 has the same bug, but the patch
doesn't apply cleanly there. It could be made to work but it doesn't
seem worth the effort given how rare it is to hit this problem with
pg_upgrade, and how few people are upgrading to v14 anymore.
Author: Maxim Orlov <orlovmg@gmail.com>
Discussion: https://www.postgresql.org/message-id/CACG%3DezaApSMTjd%3DM2Sfn5Ucuggd3FG8Z8Qte8Xq9k5-%2BRQis-g@mail.gmail.com
Discussion: https://www.postgresql.org/message-id/18863-72f08858855344a2@postgresql.org
Discussion: https://www.postgresql.org/message-id/18865-d4c66cf35c2a67af@postgresql.org
Backpatch-through: 15
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This new file is named pg_dependencies.c and includes all the code
directly related to the data type pg_dependencies, extracted from the
extended statistics code.
Some patches are under discussion to change its input and output
functions, and this separation makes the follow-up changes cleaner by
separating the logic related to the data type and the functional
dependencies statistics core logic in dependencies.c.
Author: Corey Huinker <corey.huinker@gmail.com>
Co-authored-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://postgr.es/m/aQ2k8--a0FfwSwX9@paquier.xyz
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This new file is named pg_ndistinct.c and includes all the code directly
related to the data type pg_ndistinct, extracted from the extended
statistics code.
Some patches are under discussion to change its input and output
functions, and this separation makes the follow-up changes cleaner by
separating the logic related to the data type and the multivariate
ndistinct coefficient core logic in mvdistinct.c.
Author: Corey Huinker <corey.huinker@gmail.com>
Co-authored-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://postgr.es/m/aQ2k8--a0FfwSwX9@paquier.xyz
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Commit 96b3784973 extended the grammar for CREATE PUBLICATION to support
the ALL SEQUENCES variant. However, it unnecessarily prepared publication
objects for this variant, which is not required. This was a copy-paste
oversight in that commit.
Additionally, rename pub_obj_type_list to pub_all_obj_type_list to better
reflect its purpose.
Author: Shlok Kyal <shlok.kyal.oss@gmail.com>
Reviewed-by: Vignesh C <vignesh21@gmail.com>
Reviewed-by: Amit Kapila <amit.kapila16@gmail.com>
Discussion: https://postgr.es/m/CANhcyEWbjkFvk3mSy5LFs9+0z4K1gDwQeFj7GUjOe+L4vxs4AA@mail.gmail.com
Discussion: https://postgr.es/m/CAA4eK1LC+KJiAkSrpE_NwvNdidw9F2os7GERUeSxSKv71gXysQ@mail.gmail.com
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Previously we had both in code and comments. Keep the more common and
accepted variant.
Author: Chao Li <lic@highgo.com>
Reviewed-by: Peter Smith <smithpb2250@gmail.com>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/5EBF1771-0566-4D08-9F9B-CDCDEF4BDC98@gmail.com
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The maximum limits for point name, library name, function name and
private area size were not kept track of in the tests. The new function
introduced in 16a2f706951e gives a way to trigger them. This is not
critical but cheap to cover.
While on it, this commit cleans up some of the tests introduced by
16a2f706951e for NULL inputs by using more consistent argument values.
The coverage does not change, but it makes the whole less confusing with
argument values that are correct based their position in the SQL
function called.
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Reviewed-by: Xuneng Zhou <xunengzhou@gmail.com>
Discussion: https://postgr.es/m/aRE7zhu6wOA29gFf@paquier.xyz
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Previously, error messages for oversized injection point names, libraries,
and functions showed buffer sizes (64, 128, 128) instead of the usable
character limits (63, 127, 127) as it did not count for the
zero-terminated byte, which was confusing. These messages are adjusted
to show better the reality.
The limit enforced for the private area was also too strict by one byte,
as specifying a zone worth exactly INJ_PRIVATE_MAXLEN should be able to
work because three is no zero-terminated byte in this case.
This is a stylistic change (well, mostly, a private_area size of exactly
1024 bytes can be defined with this change, something that nobody seem
to care about based on the lack of complaints). However, this is a
testing facility let's keep the logic consistent across all the branches
where this code exists, as there is an argument in favor of out-of-core
extensions that use injection points.
Author: Xuneng Zhou <xunengzhou@gmail.com>
Co-authored-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://postgr.es/m/CABPTF7VxYp4Hny1h+7ejURY-P4O5-K8WZg79Q3GUx13cQ6B2kg@mail.gmail.com
Backpatch-through: 17
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If you run pg_controldata on a cluster that has been initialized with
different PG_CONTROL_VERSION than what the pg_controldata program has
been compiled with, pg_controldata will still try to interpret the
control file, but the result is likely to be somewhat nonsensical. How
nonsensical it is depends on the differences between the versions. If
sizeof(ControlFileData) differs between the versions, the CRC will not
match and you get a warning of that, but otherwise you get no
warning.
Looking back at recent PG_CONTROL_VERSION updates, all changes that
would mess up the printed values have also changed
sizeof(ControlFileData), but there's no guarantee of that in future
versions.
Add an explicit check and warning for version number mismatch before
the CRC check. That way, you get a more clear warning if you use the
pg_controldata binary from wrong version, and if we change the control
file in the future in a way that doesn't change
sizeof(ControlFileData), this ensures that you get a warning in that
case too.
Discussion: https://www.postgresql.org/message-id/2afded89-f9f0-4191-84d8-8b8668e029a1@iki.fi
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I forgot these in commit 3e0ae46d90.
Discussion: https://www.postgresql.org/message-id/2afded89-f9f0-4191-84d8-8b8668e029a1@iki.fi
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guc_var_compare() is invoked from qsort() on an array of struct
config_generic, but the function accesses these directly as
strings (char *). This relies on the name being the first field, so
this works. But we can write this more clearly by using the struct
and then accessing the field through the struct. Before the
reorganization of the GUC structs (commit a13833c35f9), the old code
was probably more convenient, but now we can write this more clearly
and correctly.
After this change, it is no longer required that the name is the first
field in struct config_generic, so remove that comment.
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/2c961fa1-14f6-44a2-985c-e30b95654e8d%40eisentraut.org
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Commit 3e0ae46d90 added a field to ControlFileData and bumped
CATALOG_VERSION_NO, but CATALOG_VERSION_NO is not the right version
number for ControlFileData changes. Bumping either one will force an
initdb, but PG_CONTROL_VERSION is more accurate. Bump
PG_CONTROL_VERSION now.
Reported-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/1874404.1762787779@sss.pgh.pa.us
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This omission allowed table owners to create statistics in any
schema, potentially leading to unexpected naming conflicts. For
ALTER TABLE commands that require re-creating statistics objects,
skip this check in case the user has since lost CREATE on the
schema. The addition of a second parameter to CreateStatistics()
breaks ABI compatibility, but we are unaware of any impacted
third-party code.
Reported-by: Jelte Fennema-Nio <postgres@jeltef.nl>
Author: Jelte Fennema-Nio <postgres@jeltef.nl>
Co-authored-by: Nathan Bossart <nathandbossart@gmail.com>
Reviewed-by: Noah Misch <noah@leadboat.com>
Reviewed-by: Álvaro Herrera <alvherre@kurilemu.de>
Security: CVE-2025-12817
Backpatch-through: 13
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Several functions could overflow their size calculations, when presented
with very large inputs from remote and/or untrusted locations, and then
allocate buffers that were too small to hold the intended contents.
Switch from int to size_t where appropriate, and check for overflow
conditions when the inputs could have plausibly originated outside of
the libpq trust boundary. (Overflows from within the trust boundary are
still possible, but these will be fixed separately.) A version of
add_size() is ported from the backend to assist with code that performs
more complicated concatenation.
Reported-by: Aleksey Solovev (Positive Technologies)
Reviewed-by: Noah Misch <noah@leadboat.com>
Reviewed-by: Álvaro Herrera <alvherre@kurilemu.de>
Security: CVE-2025-12818
Backpatch-through: 13
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It seems plausible that someone might want to experiment with
different values. The pressing reason though is that I'm reviewing a
patch that requires pg_upgrade to manipulate SLRU files. That patch
needs to access SLRU_PAGES_PER_SEGMENT from pg_upgrade code, and
slru.h, where SLRU_PAGES_PER_SEGMENT is currently defined, cannot be
included from frontend code. Moving it to pg_config_manual.h makes it
accessible.
Now that it's a little more likely that someone might change
SLRU_PAGES_PER_SEGMENT, add a cluster compatibility check for it.
Bump catalog version because of the new field in the control file.
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Reviewed-by: Álvaro Herrera <alvherre@kurilemu.de>
Discussion: https://www.postgresql.org/message-id/c7a4ea90-9f7b-4953-81be-b3fcb47db057@iki.fi
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One of them submitted by the author, with another one other
spotted during review so this fixes both.
Author: Tender Wang <tndrwang@gmail.com>
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Discussion: https://postgr.es/m/CAHewXN=eNx2oJ_hzxJrkSvy-1A5Qf45SM8pxERWXE+6RoZyFrw@mail.gmail.com
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While there are many tests related to relation rewrites, nothing existed
to check how the cumulative statistics behave in such cases for
relations.
A different patch is under discussion to move the relation statistics to
be tracked on a per-relfilenode basis, so as these could be rebuilt
during crash recovery. This commit gives us a way to check (and perhaps
change) the existing behaviors for several rewrite scenarios, mixing
transactions, sub-transactions, two-phase commit and VACUUM.
Author: Bertrand Drouvot <bertranddrouvot.pg@gmail.com>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://postgr.es/m/aQ3X20hbqoThQXgp@ip-10-97-1-34.eu-west-3.compute.internal
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This new function is able to take in input more data than the existing
injection_point_attach():
- A library name.
- A function name.
- Some private data.
This gives more flexibility for tests so as these would not need to
reinvent a wrapper for InjectionPointAttach() when attaching a callback
from a library other than "injection_points". injection_point_detach()
can be used with both versions of injection_point_attach().
Author: Rahila Syed <rahilasyed.90@gmail.com>
Reviewed-by: Mihail Nikalayeu <mihailnikalayeu@gmail.com>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://postgr.es/m/CAH2L28sOG2b_TKkZU51dy+pWJtny1mqDmeFiFoUASGa0X0iiKQ@mail.gmail.com
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Author: Tatsuya Kawata <kawatatatsuya0913@gmail.com>
Discussion: https://postgr.es/m/CAHza6qeNbqgMfgDi15Dv6E6GWx+8maRAqe97OwzYz3qpEFouJQ@mail.gmail.com
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Was added in commit 5e89985928795f243dc287210c2aa016dfd00bfe.
Reported-by: Ashutosh Bapat
Author: Ashutosh Bapat
Discussion: https://postgr.es/m/CAExHW5tba_biyuMrd_iPVzq-+XvsMdPcEnjQ+d+__V=cjYj8Pg@mail.gmail.com
Backpatch-through: master
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generic-gcc.h maps our read and write barriers to C11 acquire and
release fences using compiler builtins, for platforms where we don't
have our own hand-rolled assembler. This is apparently enough for GCC,
but the C11 memory model is only defined in terms of atomic accesses,
and our barriers for non-atomic, non-volatile accesses were not always
respected under Clang's stricter interpretation of the standard.
This explains the occasional breakage observed on new RISC-V + Clang
animal greenfly in lock-free PgAioHandle manipulation code containing a
repeating pattern of loads and read barriers. The problem can also be
observed in code generated for MIPS and LoongAarch, though we aren't
currently testing those with Clang, and on x86, though we use our own
assembler there. The scariest aspect is that we use the generic version
on very common ARM systems, but it doesn't seem to reorder the relevant
code there (or we'd have debugged this long ago).
Fix by inserting an explicit compiler barrier. It expands to an empty
assembler block declared to have memory side-effects, so registers are
flushed and reordering is prevented. In those respects this is like the
architecture-specific assembler versions, but the compiler is still in
charge of generating the appropriate fence instruction. Done for write
barriers on principle, though concrete problems have only been observed
with read barriers.
Reported-by: Alexander Lakhin <exclusion@gmail.com>
Tested-by: Alexander Lakhin <exclusion@gmail.com>
Discussion: https://postgr.es/m/d79691be-22bd-457d-9d90-18033b78c40a%40gmail.com
Backpatch-through: 13
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We only need to do it for WAIT_LSN_TYPE_REPLAY. WAIT_LSN_TYPE_FLUSH can work
for both primary and follower.
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This commit adds the --continue-on-error option, allowing pgbench clients
to continue running even when SQL statements fail for reasons other than
serialization or deadlock errors. Without this option (by default),
the clients aborts in such cases, which was the only available behavior
previously.
This option is useful for benchmarks using custom scripts that may
raise errors, such as unique constraint violations, where users want
pgbench to complete the run despite individual statement failures.
Author: Rintaro Ikeda <ikedarintarof@oss.nttdata.com>
Co-authored-by: Yugo Nagata <nagata@sraoss.co.jp>
Co-authored-by: Fujii Masao <masao.fujii@gmail.com>
Reviewed-by: Stepan Neretin <slpmcf@gmail.com>
Reviewed-by: Matthias van de Meent <boekewurm+postgres@gmail.com>
Reviewed-by: Dilip Kumar <dilipbalaut@gmail.com>
Reviewed-by: Srinath Reddy Sadipiralla <srinath2133@gmail.com>
Reviewed-by: Hayato Kuroda <kuroda.hayato@fujitsu.com>
Reviewed-by: Anthonin Bonnefoy <anthonin.bonnefoy@datadoghq.com>
Reviewed-by: Chao Li <lic@highgo.com>
Discussion: https://postgr.es/m/44334231a4d214fac382a69cceb7d9fc@oss.nttdata.com
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This warning was disabled in meson.build (warning 4273). If you
enable it, it looks like this:
../src/backend/utils/misc/ps_status.c(27): warning C4273: '__p__environ': inconsistent dll linkage
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\stdlib.h(1158): note: see previous definition of '__p__environ'
The declaration in ps_status.c was:
#if !defined(WIN32) || defined(_MSC_VER)
extern char **environ;
#endif
The declaration in the OS header file is:
_DCRTIMP char*** __cdecl __p__environ (void);
#define _environ (*__p__environ())
So it is evident that this could be problematic.
The old declaration was required by the old MSVCRT library, but we
don't support that anymore with MSVC.
To fix, disable the re-declaration in ps_status.c, and also in some
other places that use the same code pattern but didn't trigger the
warning.
Then we can also re-enable the warning (delete the disablement in
meson.build).
Reviewed-by: Bryan Green <dbryan.green@gmail.com>
Reviewed-by: Andres Freund <andres@anarazel.de>
Discussion: https://www.postgresql.org/message-id/flat/bf060644-47ff-441b-97cf-c685d0827757@eisentraut.org
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This commit adds a new column, seq_sync_error_count, to the
pg_stat_subscription_stats view. This counter tracks the number of errors
encountered by the sequence synchronization worker during operation.
Since a single worker handles the synchronization of all sequences, this
value may reflect errors from multiple sequences. This addition improves
observability of sequence synchronization behavior and helps monitor
potential issues during replication.
Author: Vignesh C <vignesh21@gmail.com>
Reviewed-by: shveta malik <shveta.malik@gmail.com>
Reviewed-by: Peter Smith <smithpb2250@gmail.com>
Reviewed-by: Amit Kapila <amit.kapila16@gmail.com>
Discussion: https://postgr.es/m/CAA4eK1LC+KJiAkSrpE_NwvNdidw9F2os7GERUeSxSKv71gXysQ@mail.gmail.com
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The prior commit made it legal to modify BufferDesc.state while the buffer
header spinlock is held. This allows us to replace the CAS loop
inUnpinBufferNoOwner() with an atomic sub. This improves scalability
significantly. See the prior commits for more background.
Reviewed-by: Matthias van de Meent <boekewurm+postgres@gmail.com>
Discussion: https://postgr.es/m/fvfmkr5kk4nyex56ejgxj3uzi63isfxovp2biecb4bspbjrze7@az2pljabhnff
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Until now BufferDesc.state was not allowed to be modified while the buffer
header spinlock was held. This meant that operations like unpinning buffers
needed to use a CAS loop, waiting for the buffer header spinlock to be
released before updating.
The benefit of that restriction is that it allowed us to unlock the buffer
header spinlock with just a write barrier and an unlocked write (instead of a
full atomic operation). That was important to avoid regressions in
48354581a49c. However, since then the hottest buffer header spinlock uses have
been replaced with atomic operations (in particular, the most common use of
PinBuffer_Locked(), in GetVictimBuffer() (formerly in BufferAlloc()), has been
removed in 5e899859287).
This change will allow, in a subsequent commit, to release buffer pins with a
single atomic-sub operation. This previously was not possible while such
operations were not allowed while the buffer header spinlock was held, as an
atomic-sub would not have allowed a race-free check for the buffer header lock
being held.
Using atomic-sub to unpin buffers is a nice scalability win, however it is not
the primary motivation for this change (although it would be sufficient). The
primary motivation is that we would like to merge the buffer content lock into
BufferDesc.state, which will result in more frequent changes of the state
variable, which in some situations can cause a performance regression, due to
an increased CAS failure rate when unpinning buffers. The regression entirely
vanishes when using atomic-sub.
Naively implementing this would require putting CAS loops in every place
modifying the buffer state while holding the buffer header lock. To avoid
that, introduce UnlockBufHdrExt(), which can set/add flags as well as the
refcount, together with releasing the lock.
Reviewed-by: Robert Haas <robertmhaas@gmail.com>
Reviewed-by: Matthias van de Meent <boekewurm+postgres@gmail.com>
Discussion: https://postgr.es/m/fvfmkr5kk4nyex56ejgxj3uzi63isfxovp2biecb4bspbjrze7@az2pljabhnff
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A couple of ereports were making use of StringInfos as temporary storage
for the portions of the WARNING message. One was doing this to avoid
having 2 separate ereports. This was all fairly unnecessary and
resulted in more code rather than less code.
Refactor out the additional StringInfos and make
check_publications_origin_tables() use 2 ereports.
In passing, adjust pubnames to become a stack-allocated StringInfoData to
avoid having to palloc the temporary StringInfoData. This follows on
from the efforts made in 6d0eba662.
Author: Mats Kindahl <mats.kindahl@gmail.com>
Reviewed-by: David Rowley <dgrowleyml@gmail.com>
Reviewed-by: Amit Kapila <amit.kapila16@gmail.com>
Reviewed-by: Álvaro Herrera <alvherre@kurilemu.de>
Discussion: https://postgr.es/m/0b381b02-cab9-41f9-a900-ad6c8d26c1fc%40gmail.com
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Now that commit 06edbed47862 has introduced XLogRecPtrIsValid(), we can
use that instead of:
- XLogRecPtrIsInvalid()
- direct comparisons with InvalidXLogRecPtr
- direct comparisons with literal 0
This makes the code more consistent.
Author: Bertrand Drouvot <bertranddrouvot.pg@gmail.com>
Discussion: https://postgr.es/m/aQB7EvGqrbZXrMlg@ip-10-97-1-34.eu-west-3.compute.internal
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XLogRecPtrIsInvalid() is inconsistent with the affirmative form of
macros used for other datatypes, and leads to awkward double negatives
in a few places. This commit introduces XLogRecPtrIsValid(), which
allows code to be written more naturally.
This patch only adds the new macro. XLogRecPtrIsInvalid() is left in
place, and all existing callers remain untouched. This means all
supported branches can accept hypothetical bug fixes that use the new
macro, and at the same time any code that compiled with the original
formulation will continue to silently compile just fine.
Author: Bertrand Drouvot <bertranddrouvot.pg@gmail.com>
Backpatch-through: 13
Discussion: https://postgr.es/m/aQB7EvGqrbZXrMlg@ip-10-97-1-34.eu-west-3.compute.internal
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... and remove the list of \pset options from the general \? output.
That list was getting out of hand, both for developers to keep up to
date as well as for users to read.
Author: Álvaro Herrera <alvherre@kurilemu.de>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/202511041638.dm4qukcxfjto@alvherre.pgsql
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Stored generated columns are not yet computed when the filtering
happens, so we need to prohibit them to avoid incorrect behavior.
Virtual generated columns currently error out ("unexpected virtual
generated column reference"). They could probably work if we expand
them in the right place, but for now let's keep them consistent with
the stored variant. This doesn't change the behavior, it only gives a
nicer error message.
Co-authored-by: jian he <jian.universality@gmail.com>
Reviewed-by: Kirill Reshke <reshkekirill@gmail.com>
Reviewed-by: Masahiko Sawada <sawada.mshk@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/CACJufxHb8YPQ095R_pYDr77W9XKNaXg5Rzy-WP525mkq+hRM3g@mail.gmail.com
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Before commit e25626677f, spinlocks were implemented using semaphores
on some platforms (--disable-spinlocks). That made it necessary to
initialize semaphores early, before any spinlocks could be used. Now
that we don't support --disable-spinlocks anymore, we can allocate the
shared memory needed for semaphores the same way as other shared
memory structures. Since the semaphores are used only in the PGPROC
array, move the semaphore shmem size estimation and initialization
calls to ProcGlobalShmemSize() and InitProcGlobal().
Author: Ashutosh Bapat <ashutosh.bapat.oss@gmail.com>
Discussion: https://www.postgresql.org/message-id/CAExHW5seSZpPx-znjidVZNzdagGHOk06F+Ds88MpPUbxd1kTaA@mail.gmail.com
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Before commit e25626677f, PGReserveSemaphores() had to be called
before SpinlockSemaInit() because spinlocks were implemented using
semaphores on some platforms (--disable-spinlocks). Add a comment
explaining that.
Author: Ashutosh Bapat <ashutosh.bapat.oss@gmail.com>
Discussion: https://www.postgresql.org/message-id/CAExHW5seSZpPx-znjidVZNzdagGHOk06F+Ds88MpPUbxd1kTaA@mail.gmail.com
Backpatch-to: 18
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Discussion: https://www.postgresql.org/message-id/flat/E1vEsbx-004QDO-0o%40gemulon.postgresql.org
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Fix a typo, add some missing conjunctions, and make a sentence flow
more smoothly.
Author: Paul A. Jungwirth <pj@illuminatedcomputing.com>
Discussion: https://postgr.es/m/CA%2BrenyXZgwzegmO5t%3DUSU%3D9Wo5bc-YqNf-6E7Nv7e577DCmYXA%40mail.gmail.com
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Test failure on buildfarm member prion:
The test failed due to an unexpected LOCATION: line appearing between the
WARNING and ERROR messages. This occurred because the prion machine uses
log_error_verbosity = verbose, which includes additional context in error
messages. The test was originally checking for both WARNING and ERROR
messages in sequence sync, but the extra LOCATION: line disrupted this
pattern. To make the test robust across different verbosity settings, it
now only checks for the presence of the WARNING message after the test,
which is sufficient to validate the intended behavior.
Failure to sync sequences with quoted names:
The previous implementation did not correctly quote sequence names when
querying remote information, leading to failures when quoted sequence
names were used. This fix ensures that sequence names are properly quoted
during remote queries, allowing sequences with quoted identifiers to be
synced correctly.
Author: Vignesh C <vignesh21@gmail.com>
Author: Shinya Kato <shinya11.kato@gmail.com>
Reviewed-by: Amit Kapila <amit.kapila16@gmail.com>
Discussion: https://postgr.es/m/CALDaNm0WcdSCoNPiE-5ek4J2dMJ5o111GPTzKCYj9G5i=ONYtQ@mail.gmail.com
Discussion: https://postgr.es/m/CAOzEurQOSN=Zcp9uVnatNbAy=2WgMTJn_DYszYjv0KUeQX_e_A@mail.gmail.com
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Since OpenBSD core dumps do not embed executable paths, the script now
searches for the corresponding binary manually within the specified
directory before invoking LLDB. This is imperfect but should find the
right executable in practice, as needed for meaningful backtraces.
Author: Nazir Bilal Yavuz <byavuz81@gmail.com>
Discussion: https://postgr.es/m/CAN55FZ36R74TZ8RKsFueYwLxGKDAm3LU2FHM_ZUCSB6imd3vYA@mail.gmail.com
Backpatch-through: 18
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Like relation_stats.c, these structures are used to track the argument
number, names and types of pg_restore_attribute_stats() and
pg_clear_attribute_stats().
Extracted from a larger patch by the same author, reworded by me for
consistency with relation_stats.c.
Author: Corey Huinker <corey.huinker@gmail.com>
Discussion: https://postgr.es/m/CADkLM=dpz3KFnqP-dgJ-zvRvtjsa8UZv8wDAQdqho=qN3kX0Zg@mail.gmail.com
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Some of the changes in pg_config.h.in from commit 3853a6956c3 didn't
match the order that a fresh run would produce.
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Should have been part of commit a13833c35f9.
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03d40e4b5 added code to provide better row estimates for when a UNION
query ended up only with a single child due to other children being
found to be dummy rels. In that case, ordinarily it would be ok to call
estimate_num_groups() on the targetlist of the only child path, however
that's not safe to do if the UNION child is the result of some other set
operation as we generate targetlists containing Vars with varno==0 for
those, which estimate_num_groups() can't handle. This could lead to:
ERROR: XX000: no relation entry for relid 0
Fix this by avoiding doing this when the only child is the result of
another set operation. In that case we'll fall back on the
assume-all-rows-are-unique method.
Reported-by: Alexander Lakhin <exclusion@gmail.com>
Author: David Rowley <dgrowleyml@gmail.com>
Discussion: https://postgr.es/m/cfbc99e5-9d44-4806-ba3c-f36b57a85e21@gmail.com
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Commit 27cc7cd2b removed the epqScanDone flag from the EState struct,
and instead added an equivalent flag named relsubs_done to the EPQState
struct; but it failed to update this comment.
Author: Etsuro Fujita <etsuro.fujita@gmail.com>
Discussion: https://postgr.es/m/CAPmGK152zJ3fU5avDT5udfL0namrDeVfMTL3dxdOXw28SOrycg%40mail.gmail.com
Backpatch-through: 13
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Various places that were using StringInfo but didn't need that
StringInfo to exist beyond the scope of the function were using
makeStringInfo(), which allocates both a StringInfoData and the buffer it
uses as two separate allocations. It's more efficient for these cases to
use a StringInfoData on the stack and initialize it with initStringInfo(),
which only allocates the string buffer. This also simplifies the cleanup,
in a few cases.
Author: Mats Kindahl <mats.kindahl@gmail.com>
Reviewed-by: David Rowley <dgrowleyml@gmail.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Discussion: https://postgr.es/m/4379aac8-26f1-42f2-a356-ff0e886228d3@gmail.com
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We've successfully used libsanitizer for awhile with the undefined
and alignment sanitizers, but with some other sanitizers (at least
thread and hwaddress) it crashes due to internal recursion before
it's fully initialized itself. It turns out that that's due to the
"__ubsan_default_options" hack installed by commit f686ae82f, and we
can fix it by ensuring that __ubsan_default_options is built without
any sanitizer instrumentation hooks.
Reported-by: Emmanuel Sibi <emmanuelsibi.mec@gmail.com>
Reported-by: Alexander Lakhin <exclusion@gmail.com>
Diagnosed-by: Emmanuel Sibi <emmanuelsibi.mec@gmail.com>
Fix-suggested-by: Jacob Champion <jacob.champion@enterprisedb.com>
Author: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/F7543B04-E56C-4D68-A040-B14CCBAD38F1@gmail.com
Discussion: https://postgr.es/m/dbf77bf7-6e54-ed8a-c4ae-d196eeb664ce@gmail.com
Backpatch-through: 16
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WAIT FOR is to be used on standby and specifies waiting for
the specific WAL location to be replayed. This option is useful when
the user makes some data changes on primary and needs a guarantee to see
these changes are on standby.
WAIT FOR needs to wait without any snapshot held. Otherwise, the snapshot
could prevent the replay of WAL records, implying a kind of self-deadlock.
This is why separate utility command seems appears to be the most robust
way to implement this functionality. It's not possible to implement this as
a function. Previous experience shows that stored procedures also have
limitation in this aspect.
Discussion: https://www.postgresql.org/message-id/flat/CAPpHfdsjtZLVzxjGT8rJHCYbM0D5dwkO+BBjcirozJ6nYbOW8Q@mail.gmail.com
Discussion: https://www.postgresql.org/message-id/flat/CABPTF7UNft368x-RgOXkfj475OwEbp%2BVVO-wEXz7StgjD_%3D6sw%40mail.gmail.com
Author: Kartyshov Ivan <i.kartyshov@postgrespro.ru>
Author: Alexander Korotkov <aekorotkov@gmail.com>
Author: Xuneng Zhou <xunengzhou@gmail.com>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Reviewed-by: Peter Eisentraut <peter.eisentraut@enterprisedb.com>
Reviewed-by: Dilip Kumar <dilipbalaut@gmail.com>
Reviewed-by: Amit Kapila <amit.kapila16@gmail.com>
Reviewed-by: Alexander Lakhin <exclusion@gmail.com>
Reviewed-by: Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>
Reviewed-by: Euler Taveira <euler@eulerto.com>
Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi>
Reviewed-by: Kyotaro Horiguchi <horikyota.ntt@gmail.com>
Reviewed-by: jian he <jian.universality@gmail.com>
Reviewed-by: Álvaro Herrera <alvherre@kurilemu.de>
Reviewed-by: Xuneng Zhou <xunengzhou@gmail.com>
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Implement a new facility that allows processes to wait for WAL to reach
specific LSNs, both on primary (waiting for flush) and standby (waiting
for replay) servers.
The implementation uses shared memory with per-backend information
organized into pairing heaps, allowing O(1) access to the minimum
waited LSN. This enables fast-path checks: after replaying or flushing
WAL, the startup process or WAL writer can quickly determine if any
waiters need to be awakened.
Key components:
- New xlogwait.c/h module with WaitForLSNReplay() and WaitForLSNFlush()
- Separate pairing heaps for replay and flush waiters
- WaitLSN lightweight lock for coordinating shared state
- Wait events WAIT_FOR_WAL_REPLAY and WAIT_FOR_WAL_FLUSH for monitoring
This infrastructure can be used by features that need to wait for WAL
operations to complete.
Discussion: https://www.postgresql.org/message-id/flat/CAPpHfdsjtZLVzxjGT8rJHCYbM0D5dwkO+BBjcirozJ6nYbOW8Q@mail.gmail.com
Discussion: https://www.postgresql.org/message-id/flat/CABPTF7UNft368x-RgOXkfj475OwEbp%2BVVO-wEXz7StgjD_%3D6sw%40mail.gmail.com
Author: Kartyshov Ivan <i.kartyshov@postgrespro.ru>
Author: Alexander Korotkov <aekorotkov@gmail.com>
Author: Xuneng Zhou <xunengzhou@gmail.com>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Reviewed-by: Peter Eisentraut <peter.eisentraut@enterprisedb.com>
Reviewed-by: Dilip Kumar <dilipbalaut@gmail.com>
Reviewed-by: Amit Kapila <amit.kapila16@gmail.com>
Reviewed-by: Alexander Lakhin <exclusion@gmail.com>
Reviewed-by: Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>
Reviewed-by: Euler Taveira <euler@eulerto.com>
Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi>
Reviewed-by: Kyotaro Horiguchi <horikyota.ntt@gmail.com>
Reviewed-by: Xuneng Zhou <xunengzhou@gmail.com>
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The existing pairingheap_allocate() uses palloc(), which allocates
from process-local memory. For shared memory use cases, the pairingheap
structure must be allocated via ShmemAlloc() or embedded in a shared
memory struct. Add pairingheap_initialize() to initialize an already-
allocated pairingheap structure in-place, enabling shared memory usage.
Discussion: https://www.postgresql.org/message-id/flat/CAPpHfdsjtZLVzxjGT8rJHCYbM0D5dwkO+BBjcirozJ6nYbOW8Q@mail.gmail.com
Discussion: https://www.postgresql.org/message-id/flat/CABPTF7UNft368x-RgOXkfj475OwEbp%2BVVO-wEXz7StgjD_%3D6sw%40mail.gmail.com
Author: Kartyshov Ivan <i.kartyshov@postgrespro.ru>
Author: Alexander Korotkov <aekorotkov@gmail.com>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Reviewed-by: Peter Eisentraut <peter.eisentraut@enterprisedb.com>
Reviewed-by: Dilip Kumar <dilipbalaut@gmail.com>
Reviewed-by: Amit Kapila <amit.kapila16@gmail.com>
Reviewed-by: Alexander Lakhin <exclusion@gmail.com>
Reviewed-by: Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>
Reviewed-by: Euler Taveira <euler@eulerto.com>
Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi>
Reviewed-by: Kyotaro Horiguchi <horikyota.ntt@gmail.com>
Reviewed-by: Xuneng Zhou <xunengzhou@gmail.com>
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