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Some lines were indented by an inconsistent number of spaces. While
we're here, also fix some code that used the newline after left
parenthesis style, which is obsolete.
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Some of the behaviors of the different referential actions, such as
the difference between NO ACTION and RESTRICT are best illustrated
using a case-insensitive collation. So add some tests for that.
(What is actually being tested here is the behavior with values that
are "distinct" (binary different) but compare as equal. Another way
to do that would be with positive and negative zeroes with float
types. But this way seems nicer and more flexible.)
Discussion: https://www.postgresql.org/message-id/ea5b2777-266a-46fa-852f-6fca6ec480ad@eisentraut.org
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There is no point in transforming OR-clauses into SAOP's if the target index
doesn't support SAOP scans anyway. This commit adds corresponding checks
to match_orclause_to_indexcol() and group_similar_or_args(). The first check
fixes the actual bug, while the second just saves some cycles.
Reported-by: Alexander Lakhin
Discussion: https://postgr.es/m/8174de69-9e1a-0827-0e81-ef97f56a5939%40gmail.com
Author: Alena Rybakina
Reviewed-by: Ranier Vilela, Alexander Korotkov, Andrei Lepikhov
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Reported-by: Richard Guo
Discussion: https://postgr.es/m/CAMbWs492vMy3XNjDZRtqtHfFTK6HVeDwhrEQH7eXGgF_h5Jnzw@mail.gmail.com
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Like 91f5a4a000ea for pg_amcheck, this makes the code more
self-documented as there is less need to look in the headers what a
hardcoded value means. This touches queries related to procedures, AMs,
functions, databases, relations, constraints, collations, types and
extended stats, pulling into psql their *_d.h headers. The queries are
written the same way as originally.
There are still a couple of hardcoded values. These cannot be included
yet as they are not exposed in headers that are safe to use in frontend
code.
Note that describe.c was including pg_am.h that should be used only in
backend code. This is updated to use pg_am_d.h.
Reviewed-by: Daniel Gustafsson, Corey Huinker
Discussion: https://postgr.es/m/Zxb2hpca-pZc6zKe@paquier.xyz
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If we are pulling up a subquery that's under an outer join, and
the subquery's target list contains a strict expression that uses
both a subquery variable and a lateral-reference variable, it's okay
to pull up the expression without wrapping it in a PlaceHolderVar.
That's safe because if the subquery variable is forced to NULL
by the outer join, the expression result will come out as NULL too,
so we don't have to force that outcome by evaluating the expression
below the outer join. It'd be correct to wrap in a PHV, but that can
lead to very significantly worse plans, since we'd then have to use
a nestloop plan to pass down the lateral reference to where the
expression will be evaluated.
However, when we do that, we should not mark the lateral reference
variable as being nulled by the outer join, because it isn't after
we pull up the expression in this way. So the marking logic added
by cb8e50a4a was incorrect in this detail, leading to "wrong
varnullingrels" errors from the consistency-checking logic in
setrefs.c. It seems to be sufficient to just not mark lateral
references at all in this case. (I have a nagging feeling that more
complexity may be needed in cases where there are several levels of
outer join, but some attempts to break it with that didn't succeed.)
Per report from Bertrand Mamasam. Back-patch to v16, as the previous
patch was.
Discussion: https://postgr.es/m/CACZ67_UA_EVrqiFXJu9XK50baEpH=ofEPJswa2kFxg6xuSw-ww@mail.gmail.com
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Author: Peter Smith <smithpb2250@gmail.com>
Reviewed-by: vignesh C <vignesh21@gmail.com>
Discussion: https://postgr.es/m/CAHut+PvE+2T2etdTaHi3n+xbCG_UYrshQuCbaAdJCFPpQGLwgQ@mail.gmail.com
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The underlying feature for this was added in PostgreSQL 17.
Author: Jian He <jian.universality@gmail.com>
Discussion: https://www.postgresql.org/message-id/CACJufxEmNjxvf1deR1zBrJbjAMeCooooLRzZ+yaaBuqDKh_6-Q@mail.gmail.com
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Many of them just seem to have been copied around for no real reason.
Their presence causes (small) risks of hiding actual type mismatches
or silently discarding qualifiers
Discussion: https://www.postgresql.org/message-id/flat/461ea37c-8b58-43b4-9736-52884e862820@eisentraut.org
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The C standard says that sizeof(bool) is implementation-defined, but we
know of no current systems where it is not 1. The last known systems
seem to have been Apple macOS/PowerPC 10.5 and Microsoft Visual C++ 4,
both long defunct.
PostgreSQL has always required sizeof(bool) == 1 for the definition of
bool that it used, but previously it would define its own type if the
system-provided bool had a different size. That was liable to cause
memory layout problems when interacting with system and third-party
libraries on (by now hypothetical) computers with wider _Bool, and now
C23 has introduced a new problem by making bool a built-in datatype
(like C++), so the fallback code doesn't even compile. We could
probably work around that, but then we'd be writing new untested code
for a computer that doesn't exist.
Instead, delete the unreachable and C23-uncompilable fallback code, and
let existing static assertions fail if the system-provided bool is too
wide. If we ever get a problem report from a real system, then it will
be time to figure out what to do about it in a way that also works on
modern compilers.
Note on C++: Previously we avoided including <stdbool.h> or trying to
define a new bool type in headers that might be included by C++ code.
These days we might as well just include <stdbool.h> unconditionally:
it should be visible to C++11 but do nothing, just as in C23. We
already include <stdint.h> without C++ guards in c.h, and that falls
under the same C99-compatibility section of the C++11 standard as
<stdbool.h>, so let's remove the guards here too.
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/3198438.1731895163%40sss.pgh.pa.us
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Presently, we check for compiler support for the required
intrinsics both with and without the -msse4.2 compiler flag, and
then depending on the results of those checks, we pick which files
to compile with which flags. This is tedious and complicated, and
it results in unsustainable coding patterns such as separate files
for each portion of code that may need to be built with different
compiler flags.
This commit makes use of the newly-added support for
__attribute__((target(...))) in the SSE4.2 CRC-32C code. This
simplifies both the configure-time checks and the build scripts,
and it allows us to place the functions that use the intrinsics in
files that we otherwise do not want to build with special CPU
instructions (although this commit refrains from doing so). This
is also preparatory work for a proposed follow-up commit that will
further optimize the CRC-32C code with AVX-512 instructions.
While at it, this commit modifies meson's checks for SSE4.2 CRC
support to be the same as autoconf's. meson was choosing whether
to use a runtime check based purely on whether -msse4.2 is
required, while autoconf has long checked for the __SSE4_2__
preprocessor symbol to decide. meson's previous approach seems to
work just fine, but this change avoids needing to build multiple
test programs and to keep track of whether to actually use
pg_attribute_target().
Ideally we'd use __attribute__((target(...))) for ARMv8 CRC
support, too, but there's little point in doing so because until
clang 16, using the ARM intrinsics still requires special compiler
flags. Perhaps we can re-evaluate this decision after some time
has passed.
Author: Raghuveer Devulapalli
Discussion: https://postgr.es/m/PH8PR11MB8286BE735A463468415D46B5FB5C2%40PH8PR11MB8286.namprd11.prod.outlook.com
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They were all missing punctuation, one was missing initial capital.
Per our message style guidelines.
No backpatch, to avoid breaking existing translations.
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This struct member is initialized again a few lines below in the same
function. This is cosmetic, so no backpatch.
Reported-by: Jingtang Zhang <mrdrivingduck@gmail.com>
Discussion: https://postgr.es/m/AFF74506-B925-46BB-B875-CF5A946170EB@gmail.com
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Avoid leaking the prior value when updating the "connection"
state variable.
Ditto for ECPGstruct_sizeof. (It seems like this one ought to
be statement-local, but testing says it isn't, and I didn't
feel like diving deeper.)
The actual_type[] entries are statement-local, though, so
no need to mm_strdup() strings stored in them.
Likewise, sqlda variables are statement-local, so we can
loc_alloc them.
Also clean up sloppiness around management of the argsinsert and
argsresult lists.
progname changes are strictly to prevent valgrind from complaining
about leaked allocations.
With this, valgrind reports zero leakage in the ecpg preprocessor
for all of our ecpg regression test cases.
Discussion: https://postgr.es/m/2011420.1713493114@sss.pgh.pa.us
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This didn't work earlier in the patch series (I think some of
the strings were ending up in data-type-related structures),
but apparently we're now clean enough for it. This considerably
reduces process-lifespan memory leakage.
Discussion: https://postgr.es/m/2011420.1713493114@sss.pgh.pa.us
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ECPGfree_type() and related functions were quite incomplete
about removing subsidiary data structures. Possibly this is
because ecpg wasn't careful to make sure said data structures
always had their own storage. Previous patches in this series
cleaned up a lot of that, and I had to add a couple more
mm_strdup's here.
Also, ecpg.trailer tended to overwrite struct_member_list[struct_level]
without bothering to free up its previous contents, thus potentially
leaking a lot of struct-member-related storage. Add
ECPGfree_struct_member() calls at appropriate points.
Discussion: https://postgr.es/m/2011420.1713493114@sss.pgh.pa.us
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Commit 0785d1b8b adds support for libpq as a JSON client, but
allocations for string tokens can still be leaked during parsing
failures. This is tricky to fix for the object_field semantic callbacks:
the field name must remain valid until the end of the object, but if a
parsing error is encountered partway through, object_field_end() won't
be invoked and the client won't get a chance to free the field name.
This patch adds a flag to switch the ownership of parsed tokens to the
lexer. When this is enabled, the client must make a copy of any tokens
it wants to persist past the callback lifetime, but the lexer will
handle necessary cleanup on failure.
Backend uses of the JSON parser don't need to use this flag, since the
parser's allocations will occur in a short lived memory context.
A -o option has been added to test_json_parser_incremental to exercise
the new setJsonLexContextOwnsTokens() API, and the test_json_parser TAP
tests make use of it. (The test program now cleans up allocated memory,
so that tests can be usefully run under leak sanitizers.)
Author: Jacob Champion
Discussion: https://postgr.es/m/CAOYmi+kb38EciwyBQOf9peApKGwraHqA7pgzBkvoUnw5BRfS1g@mail.gmail.com
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1. The error reporting of "port setrequested list-of-packages..."
changed, hiding errors we were relying on to know if all packages in our
list were already installed. Use a loop instead.
2. The cached MacPorts installation was shared between PostgreSQL
major branches, though each branch wanted different packages. Add the
list of packages to cache key, so that different branches, when tested
in one github account/repo such as postgres/postgres, stop fighting with
each other, adding and removing packages.
Back-patch to 15 where CI began.
Author: Thomas Munro <thomas.munro@gmail.com>
Author: Nazir Bilal Yavuz <byavuz81@gmail.com>
Suggested-by: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/au2uqfuy2nf43nwy2txmc5t2emhwij7kzupygto3d2ffgtrdgr%40ckvrlwyflnh2
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Commit ccd38024bc, which introduced the pg_signal_autovacuum_worker
role, added a call to pgstat_get_beentry_by_proc_number() for the
purpose of determining whether the process is an autovacuum worker.
This function calls pgstat_read_current_status(), which can be
fairly expensive and may return cached, out-of-date information.
Since we just need to look up the target backend's BackendType, and
we already know its ProcNumber, we can instead inspect the
BackendStatusArray directly, which is much less expensive and
possibly more up-to-date. There are some caveats with this
approach (which are documented in the code), but it's still
substantially better than before.
Reported-by: Andres Freund
Reviewed-by: Andres Freund
Discussion: https://postgr.es/m/ujenaa2uabzfkwxwmfifawzdozh3ljr7geozlhftsuosgm7n7q%40g3utqqyyosb6
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Emitting each variable separately is unnecessarily verbose / hard to skim
over. Emit the whole thing in one ereport() to address that.
Also remove program name and function reference from the message. The former
doesn't seem particularly helpful and the latter is provided by the elog.c
infrastructure these days.
Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi>
Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Discussion: https://postgr.es/m/leouteo5ozcrux3fepuhtbp6c56tbfd4naxeokidbx7m75cabz@hhw6g4urlowt
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During pgbench's table initialization, progress updates could display
leftover characters from the previous message if the new message
was shorter. This commit resolves the issue by appending spaces to
the current message to fully overwrite any remaining characters from
the previous line.
Back-patch to all the supported versions.
Author: Yushi Ogiwara, Tatsuo Ishii, Fujii Masao
Reviewed-by: Tatsuo Ishii, Fujii Masao
Discussion: https://postgr.es/m/9a9b8b95b6a709877ae48ad5b0c59bb9@oss.nttdata.com
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We added pg_constraint rows for all not-null constraints, first for
tables and later for domains; but while the ones for tables were
reverted, the ones for domains were not. However, we did accidentally
revert ruleutils.c support for the ones on domains in 6f8bb7c1e961,
which breaks running pg_get_constraintdef() on them. Put that back.
This is only needed in branch 17, because we've reinstated this code in
branch master with commit 14e87ffa5c54. Add some new tests in both
branches.
I couldn't find anything else that needs de-reverting.
Reported-by: Erki Eessaar <erki.eessaar@taltech.ee>
Reviewed-by: Magnus Hagander <magnus@hagander.net>
Discussion: https://postgr.es/m/AS8PR01MB75110350415AAB8BBABBA1ECFE222@AS8PR01MB7511.eurprd01.prod.exchangelabs.com
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from commit 9044fc1d45a
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This reverts commit 2cf91ccb73ce888c44e3751548fb7c77e87335f2.
When using the old msvcrt.dll, MinGW would supply its own dummy version
of _configthreadlocale() that just returns -1 if you try to use it. For
a time we tolerated that to shut the build farm up. We would fall back
to code that was enough for the tests to pass, but it would surely have
risked crashing a real multithreaded program.
We don't need that kludge anymore, because we can count on ucrt. We
expect the real _configthreadlocale() to be present, and the ECPG tests
will now fail if it isn't. The workaround was dead code and it's time
to revert it.
(A later patch still under review proposes to remove this use of
_configthreadlocale() completely but we're unwinding this code in
steps.)
Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Discussion: https://postgr.es/m/d9e7731c-ca1b-477c-9298-fa51e135574a%40eisentraut.org
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Historically we tolerated the absence of various C runtime library
features for the benefit of the MinGW tool chain, because it used
ancient msvcrt.dll for a long period of time. It now uses ucrt by
default (like Windows 10+, Visual Studio 2015+), and that's the only
configuration we're testing.
In practice, we effectively required ucrt already in PostgreSQL 17, when
commit 8d9a9f03 required _create_locale etc, first available in
msvcr120.dll (Visual Studio 2013, the last of the pre-ucrt series of
runtimes), and for MinGW users that practically meant ucrt because it
was difficult or impossible to use msvcr120.dll. That may even not have
been the first such case, but old MinGW configurations had already
dropped off our testing radar so we weren't paying much attention.
This commit formalizes the requirement. It also removes a couple of
obsolete comments that discussed msvcrt.dll limitations, and some tests
of !defined(_MSC_VER) to imply msvcrt.dll. There are many more
anachronisms, but it'll take some time to figure out how to remove them
all. APIs affected relate to locales, UTF-8, threads, large files and
more.
Thanks to Peter Eisentraut for the documentation change. It's not
really necessary to talk about ucrt explicitly in such a short section,
since it's the default for MinGW-w64 and MSYS2. It's enough to prune
references and broken links to much older tools.
Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Discussion: https://postgr.es/m/d9e7731c-ca1b-477c-9298-fa51e135574a%40eisentraut.org
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All modern Windows systems have _configthreadlocale(). It was first
introduced in msvcr80.dll from Visual Studio 2005. Historically, MinGW
was stuck on even older msvcrt.dll, but added its own dummy
implementation of the function when using msvcrt.dll years ago anyway,
effectively rendering the configure test useless. In practice we don't
encounter the dummy anymore because modern MinGW uses ucrt.
Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Discussion: https://postgr.es/m/CWZBBRR6YA8D.8EHMDRGLCKCD%40neon.tech
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The error message was talking about RowCompareType but was actually
checking strategy numbers. While those are closely related, it is
better to be accurate.
Discussion: https://www.postgresql.org/message-id/flat/E72EAA49-354D-4C2E-8EB9-255197F55330@enterprisedb.com
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The test case was incorrectly matching the error code.
Author: Vignesh C
Discussion: https://postgr.es/m/CALDaNm0C5LPiTxkdqsxiyeaL=nuUP8t6ne81sp9jE0=MFz=-ew@mail.gmail.com
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This allows for example using LIKE with case-insensitive collations.
There was previously no internal implementation of this, so it was met
with a not-supported error. This adds the internal implementation and
removes the error. The implementation follows the specification of
the SQL standard for this.
Unlike with deterministic collations, the LIKE matching cannot go
character by character but has to go substring by substring. For
example, if we are matching against LIKE 'foo%bar', we can't start by
looking for an 'f', then an 'o', but instead with have to find
something that matches 'foo'. This is because the collation could
consider substrings of different lengths to be equal. This is all
internal to MatchText() in like_match.c.
The changes in GenericMatchText() in like.c just pass through the
locale information to MatchText(), which was previously not needed.
This matches exactly Generic_Text_IC_like() below.
ILIKE is not affected. (It's unclear whether ILIKE makes sense under
nondeterministic collations.)
This also updates match_pattern_prefix() in like_support.c to support
optimizing the case of an exact pattern with nondeterministic
collations. This was already alluded to in the previous code.
(includes documentation examples from Daniel Vérité and test cases
from Paul A Jungwirth)
Reviewed-by: Jian He <jian.universality@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/700d2e86-bf75-4607-9cf2-f5b7802f6e88@eisentraut.org
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Currently, logical replication produces a generic error message when
targeting a subscriber-side table column that is either missing or
generated. The error message can be misleading for generated columns.
This patch introduces a specific error message to clarify the issue when
generated columns are involved.
Author: Shubham Khanna
Reviewed-by: Peter Smith, Vignesh C, Amit Kapila
Discussion: https://postgr.es/m/CAHv8RjJBvYtqU7OAofBizOmQOK2Q8h+w9v2_cQWxT_gO7er3Aw@mail.gmail.com
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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
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The error messages in CreateWaitEventSet() made it hard to know whether the
syscall or AcquireExternalFD() failed. This is particularly relevant because
AcquireExternalFD() imposes a lower limit than what would cause syscalls fail
with EMFILE.
I did not change the message in libpqsrv_connect_prepare(), which is the one
other use of AcquireExternalFD() in our codebase, as the error message already
is less ambiguous.
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/xjjx7r4xa7beixuu4qtkdhnwdbchrrpo3gaeb3jsbinvvdiat5@cwjw55mna5of
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This matches the behavior of the makefiles and the old MSVC build
system. The main effect is that the build result gets installed into
pkglibdir rather than bindir. The documentation says to locate the
library in pkglibdir, so this makes the code match the documentation
again.
Reviewed-by: Ryohei Takahashi (Fujitsu) <r.takahashi_2@fujitsu.com>
Discussion: https://www.postgresql.org/message-id/flat/TY3PR01MB118912125614599641CA881B782522%40TY3PR01MB11891.jpnprd01.prod.outlook.com
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Most came in during the 17 cycle, so backpatch there. Some
(particularly reorderbuffer.h) are very old, but backpatching doesn't
seem useful.
Like commits c9d297751959, c4f113e8fef9.
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The code comment said, 'the argument should be declared "PGShmemHeader
*seghdr", but we use void to avoid having to include ipc.h in
shmem.h.' We can achieve the original goal with a struct forward
declaration. (ipc.h was also not the correct header file.)
Discussion: https://www.postgresql.org/message-id/flat/cnthxg2eekacrejyeonuhiaezc7vd7o2uowlsbenxqfkjwgvwj@qgzu6eoqrglb
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Commit a8ccf4e93 uses the same table name "distinct_tbl" in both
select_distinct.sql and select_distinct_on.sql, which could cause
conflicts when these two test scripts are run in parallel.
Fix by renaming the table in select_distinct_on.sql to
"distinct_on_tbl".
Per buildfarm (via Tom Lane)
Discussion: https://postgr.es/m/1572004.1732583549@sss.pgh.pa.us
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This utility has been using hardcoded values for relkind and
relpersistence in its queries generated. These queries are switched to
use CppAsString2() instead, with the values fetched directly from the
header of pg_class. This has the advantage of making the code more
self-documented, as it becomes unnecessary to look at a header for the
meaning of a value.
There should be no functional changes; the queries are generated the
same way as before this commit.
Reviewed-by: Nathan Bossart, Daniel Gustafsson, Álvaro Herrera, Karina
Litskevich
Discussion: https://postgr.es/m/ZxIvemDk0Ob1RGwh@paquier.xyz
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The function get_param_path_clause_serials() is used to get the set of
pushed-down clauses enforced within a parameterized Path. Since we
don't currently support parameterized MergeAppend paths, and it
doesn't look like that is going to change anytime soon (as explained
in the comments for generate_orderedappend_paths), we don't need to
consider MergeAppendPath in this function.
This change won't make any measurable difference in performance; it's
just for clarity's sake.
Author: Richard Guo
Reviewed-by: Andrei Lepikhov
Discussion: https://postgr.es/m/CAMbWs4_Puie4DQ2ODvjQB_3CxYkUODnrJm8jn_ObMAcrjYNW7Q@mail.gmail.com
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The ordering of DISTINCT items is semantically insignificant, so we
can reorder them as needed. In fact, in the parser, we absorb the
sorting semantics of the sortClause as much as possible into the
distinctClause, ensuring that one clause is a prefix of the other.
This can help avoid a possible need to re-sort.
In this commit, we attempt to adjust the DISTINCT keys to match the
input path's pathkeys. This can likewise help avoid re-sorting, or
allow us to use incremental-sort to save efforts.
For DISTINCT ON expressions, the parser already ensures that they
match the initial ORDER BY expressions. When reordering the DISTINCT
keys, we must ensure that the resulting pathkey list matches the
initial distinctClause pathkeys.
This introduces a new GUC, enable_distinct_reordering, which allows
the optimization to be disabled if needed.
Author: Richard Guo
Reviewed-by: Andrei Lepikhov
Discussion: https://postgr.es/m/CAMbWs48dR26cCcX0f=8bja2JKQPcU64136kHk=xekHT9xschiQ@mail.gmail.com
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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
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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
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Various parts of pg_dump consult the --schema-only and --data-only
options to determine whether to run a section of code. While this
is simple enough for two mutually-exclusive options, it will become
progressively more complicated as more options are added. In
anticipation of that, this commit introduces new internal flags
called dumpSchema and dumpData, which are derivatives of
--schema-only and --data-only. This commit also removes the
schemaOnly and dataOnly members from the dump/restore options
structs to prevent their use elsewhere.
Note that this change neither adds new user-facing command-line
options nor changes the existing --schema-only and --data-only
options.
Author: Corey Huinker
Reviewed-by: Jeff Davis
Discussion: https://postgr.es/m/CADkLM%3DcQgghMJOS8EcAVBwRO4s1dUVtxGZv5gLPfZkQ1nL1gzA%40mail.gmail.com
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Commit aac831caf left this as a to-do; here's code to do it.
Like the previous patch, this is HEAD-only for now.
Discussion: https://postgr.es/m/4496616.iHFcN1HehY@portable-bastien
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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 <tristan@partin.io>
Discussion: https://www.postgresql.org/message-id/flat/bce0fe54-75b4-438e-b42b-8e84bc7c0e9c%40eisentraut.org
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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 <sam@gentoo.org>
Reviewed-by: Peter Eisentraut <peter@eisentraut.org> (master version)
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us> (approach)
Discussion: https://www.postgresql.org/message-id/flat/87o72eo9iu.fsf%40gentoo.org
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Obviously, the constant could be zero. Also, add the relevant check to
regression tests.
Reported-by: Richard Guo
Discussion: https://postgr.es/m/CAMbWs4-siKJdtWhcbqk4Y-xG12do2Ckm1qw672GNsSnDqL9FQg%40mail.gmail.com
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Updated to specify that it represents the exact time a slot became
inactive, rather than the period of inactivity.
Reported-by: Peter Smith
Author: Bruce Momjian, Nisha Moond
Reviewed-by: Amit Kapila, Peter Smith
Backpatch-through: 17
Discussion: https://postgr.es/m/CAHut+PuvsyA5v8y7rYoY9mkDQzUhwaESM05yCByTMaDoRh30tA@mail.gmail.com
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These tests relied on both next() and __next__(), but only the former is
needed since Python 2 support has been removed, so let's simplify a bit
the tests.
Author: Erik Wienhold
Discussion: https://postgr.es/m/173209043143.2092749.13692266486972491694@wrigleys.postgresql.org
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Commit 7b88529f4363994450bd4cd3c172006a8a77e222 fixed a regression
spanning these features, but it didn't test them. It did test code
paths sufficient for their present implementations, so no back-patch.
Reported by Matthew Woodcraft.
Discussion: https://postgr.es/m/87iksnsbhx.fsf@golux.woodcraft.me.uk
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When optimizer generates bitmap paths, it considers breaking OR-clause
arguments one-by-one. But now, a group of similar OR-clauses can be
transformed into SAOP during index matching. So, bitmap paths should
keep up.
This commit teaches bitmap paths generation machinery to group similar
OR-clauses into dedicated RestrictInfos. Those RestrictInfos are considered
both to match index as a whole (as SAOP), or to match as a set of individual
OR-clause argument one-by-one (the old way).
Therefore, bitmap path generation will takes advantage of OR-clauses to SAOP's
transformation. The old way of handling them is also considered. So, there
shouldn't be planning regression.
Discussion: https://postgr.es/m/CAPpHfdu5iQOjF93vGbjidsQkhHvY2NSm29duENYH_cbhC6x%2BMg%40mail.gmail.com
Author: Alexander Korotkov, Andrey Lepikhov
Reviewed-by: Alena Rybakina, Andrei Lepikhov, Jian he, Robert Haas
Reviewed-by: Peter Geoghegan
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