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This adds MITM and SNI as acronyms, as the documentation already had
them marked up with <acronym>.
While on it, make sure to spell man-in-the-middle with dashes
consistently, and add acronyms for those new terms where appropriate.
Author: Daniel Gustafsson
Reviewed-by: Michael Paquier
Discussion: https://postgr.es/m/CE12DD5C-4BB3-4166-BC9A-39779568734C@yesql.se
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fairywren is not happy with the pattern checks introduced by c13585f.
I am not sure if this outlines a bug in pgbench or if the regex patterns
used in the tests are too restrictive for this buildfarm member's
environment. This adds more debugging information to show the log
entries that do not match with the expected pattern, to help in finding
out what's happening. That seems like a good addition in the long-term
anyway as that may not be the only issue in this area.
Discussion: https://postgr.es/m/YNUad2HvgW+6eXyo@paquier.xyz
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The main goal of this option is to allow inspecting temporary files for
debugging purposes, so moving the parameter there is natural.
Oversight in cd91de0.
Reported-by: Justin Pryzby
Author: Euler Taveira
Discussion: https://postgr.es/m/20210612004347.GP16435@telsasoft.com
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LLVM 13 (due out in September) has changed the semantics of
LLVMOrcAbsoluteSymbols(), so we need to bump some reference counts to
avoid a double-free that causes crashes and bad query results.
A proactive change seems necessary to avoid having a window of time
where our respective latest releases would interact badly. It's
possible that the situation could change before then, though.
Thanks to Fabien Coelho for monitoring bleeding edge LLVM and Andres
Freund for tracking down the change.
Back-patch to 11, where the JIT code arrived.
Discussion: https://postgr.es/m/CA%2BhUKGLEy8mgtN7BNp0ooFAjUedDTJj5dME7NxLU-m91b85siA%40mail.gmail.com
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The logic checking for the format of per-thread logs used grep() with
directly "$re", which would cause the test to consider all the logs as
a match without caring about their format at all. Using "/$re/" makes
grep() perform a regex test, which is what we want here.
While on it, improve some of the tests to be more picky with the
patterns expected and add more comments to describe the tests.
Issue discovered while digging into a separate patch.
Author: Fabien Coelho, Michael Paquier
Discussion: https://postgr.es/m/YNPsPAUoVDCpPOGk@paquier.xyz
Backpatch-through: 11
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The queries involving ft1_nopw don't stably return the same row
anymore. I surmise that an autovacuum hitting "S 1"."T 1"
right after the updates introduced by f61db909d/5843659d0 freed
some space, changing where subsequent insertions get stored.
It's only by good luck that these results were stable before,
though, since a LIMIT without ORDER BY isn't well defined,
and it's not like we've ever treated that table as append-only
in this test script.
Since we only really care whether these commands succeed or not,
just replace "SELECT *" with "SELECT 1".
Report: https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=crake&dt=2021-06-23%2019%3A52%3A08
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In previous commit, I missed that relmap_redo() was also not acquiring the
RelationMappingLock. Thanks to Thomas Munro for pointing that out.
Backpatch-through: 9.6, like previous commit.
Discussion: https://www.postgresql.org/message-id/CA%2BhUKGLev%3DPpOSaL3WRZgOvgk217et%2BbxeJcRr4eR-NttP1F6Q%40mail.gmail.com
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Contrary to the comment here, POSIX does not guarantee atomicity of a
read(), if another process calls write() concurrently. Or at least Linux
does not. Add locking to load_relmap_file() to avoid the race condition.
Fixes bug #17064. Thanks to Alexander Lakhin for the report and test case.
Backpatch-through: 9.6, all supported versions.
Discussion: https://www.postgresql.org/message-id/17064-bb0d7904ef72add3@postgresql.org
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Commits 9de77b5453 and ac4645c015 missed to update the logical replication
message formats section in the docs.
Author: Brar Piening
Reviewed-by: Amit Kapila
Discussion: https://www.postgresql.org/message-id/cc70956c-e578-e54f-49e6-b5d68c89576f@gmx.de
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Reported-by: Simon Riggs
Author: Takamichi Osumi
Reviewed-by: Amit Kapila
Backpatch-through: 9.6
Discussion: https://www.postgresql.org/message-id/20210222222847.tpnb6eg3yiykzpky@alap3.anarazel.de
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For no obvious reason, isolationtester has always insisted that
session and step names be written with double quotes. This is
fairly tedious and does little for test readability, especially
since the names that people actually choose almost always look
like normal identifiers. Hence, let's tweak the lexer to allow
SQL-like identifiers not only double-quoted strings.
(They're SQL-like, not exactly SQL, because I didn't add any
case-folding logic. Also there's no provision for U&"..." names,
not that anyone's likely to care.)
There is one incompatibility introduced by this change: if you write
"foo""bar" with no space, that used to be taken as two identifiers,
but now it's just one identifier with an embedded quote mark.
I converted all the src/test/isolation/ specfiles to remove
unnecessary double quotes, but stopped there because my
eyes were glazing over already.
Like 741d7f104, back-patch to all supported branches, so that this
isn't a stumbling block for back-patching isolation test changes.
Discussion: https://postgr.es/m/759113.1623861959@sss.pgh.pa.us
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The syntax summaries for CREATE FUNCTION and allied commands
made it look like LEAKPROOF is an alternative to
IMMUTABLE/STABLE/VOLATILE, when of course it is an orthogonal
option. Improve that.
Per gripe from aazamrafeeque0. Thanks to David Johnston for
suggestions.
Discussion: https://postgr.es/m/162444349581.694.5818572718530259025@wrigleys.postgresql.org
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Our uses of gss_display_status() and gss_display_name() assumed
that the gss_buffer_desc strings returned by those functions are
null-terminated. It appears that they generally are, given the
lack of field complaints up to now. However, the available
documentation does not promise this, and some man pages
for gss_display_status() show examples that rely on the
gss_buffer_desc.length field instead of expecting null
termination. Also, we now have a report that on some
implementations, clang's address sanitizer is of the opinion
that the byte after the specified length is undefined.
Hence, change the code to rely on the length field instead.
This might well be cosmetic rather than fixing any real bug, but
it's hard to be sure, so back-patch to all supported branches.
While here, also back-patch the v12 changes that made pg_GSS_error
deal honestly with multiple messages available from
gss_display_status.
Per report from Sudheer H R.
Discussion: https://postgr.es/m/5372B6D4-8276-42C0-B8FB-BD0918826FC3@tekenlight.com
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Previously, isolationtester displayed SQL query results using some
ad-hoc code that clearly hadn't had much effort expended on it.
Field values longer than 14 characters weren't separated from
the next field, and usually caused misalignment of the columns
too. Also there was no visual separation of a query's result
from subsequent isolationtester output. This made test result
files confusing and hard to read.
To improve matters, let's use libpq's PQprint() function. Although
that's long since unused by psql, it's still plenty good enough
for the purpose here.
Like 741d7f104, back-patch to all supported branches, so that this
isn't a stumbling block for back-patching isolation test changes.
Discussion: https://postgr.es/m/582362.1623798221@sss.pgh.pa.us
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The code to signal a running walsender when its reserved WAL size grows
too large is completely uncovered before this commit; this adds coverage
for that case.
This test involves sending SIGSTOP to walsender and walreceiver, then
advancing enough WAL for a checkpoint to trigger, then sending SIGCONT.
There's no precedent for STOP signalling in Perl tests, and my reading
of relevant manpages says it's likely to fail on Windows. Because of
this, this test is always skipped on that platform.
This version fixes a couple of rarely hit race conditions in the
previous attempt 09126984a263; most notably, both LOG string searches
are loops, not just the second one; we acquire the start-of-log position
before STOP-signalling; and reference the correct process name in the
test description. All per Tom Lane.
Author: Álvaro Herrera <alvherre@alvh.no-ip.org>
Discussion: https://postgr.es/m/202106102202.mjw4huiix7lo@alvherre.pgsql
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We've long contended with isolation test results that aren't entirely
stable. Some test scripts insert long delays to try to force stable
results, which is not terribly desirable; but other erratic failure
modes remain, causing unrepeatable buildfarm failures. I've spent a
fair amount of time trying to solve this by improving the server-side
support code, without much success: that way is fundamentally unable
to cope with diffs that stem from chance ordering of arrival of
messages from different server processes.
We can improve matters on the client side, however, by annotating
the test scripts themselves to show the desired reporting order
of events that might occur in different orders. This patch adds
three types of annotations to deal with (a) test steps that might or
might not complete their waits before the isolationtester can see them
waiting; (b) test steps in different sessions that can legitimately
complete in either order; and (c) NOTIFY messages that might arrive
before or after the completion of a step in another session. We might
need more annotation types later, but this seems to be enough to deal
with the instabilities we've seen in the buildfarm. It also lets us
get rid of all the long delays that were previously used, cutting more
than a minute off the runtime of the isolation tests.
Back-patch to all supported branches, because the buildfarm
instabilities affect all the branches, and because it seems desirable
to keep isolationtester's capabilities the same across all branches
to simplify possible future back-patching of tests.
Discussion: https://postgr.es/m/327948.1623725828@sss.pgh.pa.us
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Commits 84f5c2908 et al missed the need to cover plpgsql's "simple
expression" code path. If the first thing we execute after a
COMMIT/ROLLBACK is one of those, rather than a full-fledged SPI command,
we must explicitly do EnsurePortalSnapshotExists() to make sure we have
an outer snapshot. Note that it wouldn't be good enough to just push a
snapshot for the duration of the expression execution: what comes back
might be toasted, so we'd better have a snapshot protecting it.
The test case demonstrating this fact cheats a bit by marking a SQL
function immutable even though it fetches from a table. That's
nothing that users haven't been seen to do, though.
Per report from Jim Nasby. Back-patch to v11, like the previous fix.
Discussion: https://postgr.es/m/378885e4-f85f-fc28-6c91-c4d1c080bf26@amazon.com
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Add a .git-blame-ignore-revs file with a list of pgindent, pgperlyidy,
and reformat-dat-files commit hashes. Postgres hackers that configure
git to use the ignore file will get git-blame output that avoids
attributing line changes to the ignored indent commits. This makes
git-blame output much easier to work with in practice.
Author: Peter Geoghegan <pg@bowt.ie>
Reviewed-By: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/CAH2-Wz=cVh3GHTP6SdLU-Gnmt2zRdF8vZkcrFdSzXQ=WhbWm9Q@mail.gmail.com
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In dc7420c2c92 I (Andres) accidentally used
RelationIsAccessibleInLogicalDecoding() as the sole condition to use the
non-shared catalog horizon in GetOldestNonRemovableTransactionId(). That is
incorrect, as RelationIsAccessibleInLogicalDecoding() checks whether wal_level
is logical.
The correct check, as done e.g. in GlobalVisTestFor(), is to check
IsCatalogRelation() and RelationIsAccessibleInLogicalDecoding().
The observed misbehavior of this bug was that there could be an endless loop
in lazy_scan_prune(), because the horizons used in heap_page_prune() and the
individual tuple liveliness checks did not match. Likely there are other
potential consequences as well.
A later commit will unify the determination which horizon has to be used, and
add additional assertions to make it easier to catch a bug like this.
Reported-By: Justin Pryzby <pryzby@telsasoft.com>
Diagnosed-By: Matthias van de Meent <boekewurm+postgres@gmail.com>
Author: Matthias van de Meent <boekewurm+postgres@gmail.com>
Discussion: https://postgr.es/m/CAEze2Wg32Y9+WJfw=aofkRx1ZRFt_Ev6bNPc4PSaz7PjSFtZgQ@mail.gmail.com
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linitial_node() fails in assert enabled builds if the given pointer is
not of the specified type. Here the type is IntList. The code thought
it should be expecting List, but it was wrong.
In the existing tests which run this code the initial list element is
always NIL. Since linitial_node() allows NULL, we didn't trigger any
assert failures in the existing regression tests.
There is still some discussion as to whether we need a few more tests in
this area, but for now, since beta2 is looming, fix the bug first.
Bug: #17067
Discussion: https://postgr.es/m/17067-665d50fa321f79e0@postgresql.org
Reported-by: Yaoguang Chen
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Source-Git-URL: git://git.postgresql.org/git/pgtranslation/messages.git
Source-Git-Hash: 70796ae860c444c764bb591c885f22cac1c168ec
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Jie Zhang
Discussion: https://postgr.es/m/TYWPR01MB767844835390EDD8DB276D75F90A9@TYWPR01MB7678.jpnprd01.prod.outlook.com
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Code comments were claiming that verify_heapam() was checking
privileges on the relation it was operating on, but it didn't actually
do that. Perhaps earlier versions of the patch did that, but now the
access is regulated by privileges on the function. Remove the wrong
comments.
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Reported-by: Masahiko Sawada
Discussion: https://postgr.es/m/CAD21AoCTHyouoGv-xt1qNjjvPbGMErLi0AJncByTvr66Nq7j8g@mail.gmail.com
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The failsafe can trigger when index processing is already disabled.
This can happen when VACUUM's INDEX_CLEANUP parameter is "off" and the
failsafe happens to trigger. Remove assertions that assume that index
processing is directly tied to the failsafe.
Oversight in commit c242baa4, which made it possible for the failsafe to
trigger in a two-pass strategy VACUUM that has yet to make its first
call to lazy_vacuum_all_indexes().
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This reverts commit 09126984a263; the test case added there failed once
in circumstances that remain mysterious. It seems better to remove the
test for now so that 14beta2 doesn't have random failures built in.
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Buildfarm members ayu and tern have sometimes shown a different
plan than expected for this query. I'd been unable to reproduce
that before today, but I finally realized what is happening.
If there is a concurrent open transaction (probably an autovacuum
run in the buildfarm, but this can also be arranged manually),
then the index entries for the rows removed by the DELETE a few
lines up are not killed promptly, causing a change in the planner's
estimate of the extremal value of ft2.c1, which moves the rowcount
estimate for "c1 > 1100" by enough to change the join plan from
nestloop to hash.
To fix, change the query condition to "c1 > 1000", causing the
hash plan to be preferred whether or not a concurrent open
transaction exists. Since this UPDATE is tailored to be a no-op,
nothing else changes.
Report: https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=ayu&dt=2021-06-09%2022%3A45%3A48
Report: https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=ayu&dt=2021-06-13%2022%3A38%3A18
Report: https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=tern&dt=2021-06-20%2004%3A55%3A36
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We had a request to provide a way to test at compile time for the
availability of the new pipeline features. More generally, it
seems like a good idea to provide a way to test via #ifdef for
all new libpq API features. People have been using the version
from pg_config.h for that; but that's more likely to represent the
server version than the libpq version, in the increasingly-common
scenario where they're different. It's safer if libpq-fe.h itself
is the source of truth about what features it offers.
Hence, establish a policy that starting in v14 we'll add a suitable
feature-is-present macro to libpq-fe.h when we add new API there.
(There doesn't seem to be much point in applying this policy
retroactively, but it's not too late for v14.)
Tom Lane and Alvaro Herrera, per suggestion from Boris Kolpackov.
Discussion: https://postgr.es/m/boris.20210617102439@codesynthesis.com
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Commit e7eea52b2d has introduced a new function
RelationGetIdentityKeyBitmap which omits to handle the case where there is
no replica identity index on a relation.
Author: Mark Dilger
Reviewed-by: Takamichi Osumi, Amit Kapila
Discussion: https://www.postgresql.org/message-id/4C99A862-69C8-431F-960A-81B1151F1B89@enterprisedb.com
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Generalize the INDEX_CLEANUP VACUUM parameter (and the corresponding
reloption): make it into a ternary style boolean parameter. It now
exposes a third option, "auto". The "auto" option (which is now the
default) enables the "bypass index vacuuming" optimization added by
commit 1e55e7d1.
"VACUUM (INDEX_CLEANUP TRUE)" is redefined to once again make VACUUM
simply do any required index vacuuming, regardless of how few dead
tuples are encountered during the first scan of the target heap relation
(unless there are exactly zero). This gives users a way of opting out
of the "bypass index vacuuming" optimization, if for whatever reason
that proves necessary. It is also expected to be used by PostgreSQL
developers as a testing option from time to time.
"VACUUM (INDEX_CLEANUP FALSE)" does the same thing as it always has: it
forcibly disables both index vacuuming and index cleanup. It's not
expected to be used much in PostgreSQL 14. The failsafe mechanism added
by commit 1e55e7d1 addresses the same problem in a simpler way.
INDEX_CLEANUP can now be thought of as a testing and compatibility
option.
Author: Peter Geoghegan <pg@bowt.ie>
Reviewed-By: Masahiko Sawada <sawada.mshk@gmail.com>
Reviewed-By: Justin Pryzby <pryzby@telsasoft.com>
Discussion: https://postgr.es/m/CAH2-WznrBoCST4_Gxh_G9hA8NzGUbeBGnOUC8FcXcrhqsv6OHQ@mail.gmail.com
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The code to signal a running walsender when its reserved WAL size grows
too large is completely uncovered before this commit; this adds coverage
for that case.
This test involves sending SIGSTOP to walsender and walreceiver and
running a checkpoint while advancing WAL, then sending SIGCONT. There's
no precedent for this coding in Perl tests, and my reading of relevant
manpages says it's likely to fail on Windows. Because of this, this
test is always skipped on that platform.
Author: Álvaro Herrera <alvherre@alvh.no-ip.org>
Discussion: https://postgr.es/m/202106102202.mjw4huiix7lo@alvherre.pgsql
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Ordinarily, a pg_policy.polroles array wouldn't list the same role
more than once; but CREATE POLICY does not prevent that. If we
perform DROP OWNED BY on a role that is listed more than once,
RemoveRoleFromObjectPolicy either suffered an assertion failure
or encountered a tuple-updated-by-self error. Rewrite it to cope
correctly with duplicate entries, and add a CommandCounterIncrement
call to prevent the other problem.
Per discussion, there's other cleanup that ought to happen here,
but this seems like the minimum essential fix.
Per bug #17062 from Alexander Lakhin. It's been broken all along,
so back-patch to all supported branches.
Discussion: https://postgr.es/m/17062-11f471ae3199ca23@postgresql.org
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Commit 547f04e73 caused pgbench to start printing its version number,
which seems like a fine idea, but it needs a bit more work:
* Print the server version number too, when different.
* Print the PG_VERSION string, not some reconstructed approximation.
This patch copies psql's well-tested code for the same purpose.
Discussion: https://postgr.es/m/1226654.1624036821@sss.pgh.pa.us
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In the "simple Query" code path, it's fine for parse analysis or
execution of a utility statement to scribble on the statement's node
tree, since that'll just be thrown away afterwards. However it's
not fine if the node tree is in the plan cache, as then it'd be
corrupted for subsequent executions. Up to now we've dealt with
that by having individual utility-statement functions apply
copyObject() if they were going to modify the tree. But that's
prone to errors of omission. Bug #17053 from Charles Samborski
shows that CREATE/ALTER DOMAIN didn't get this memo, and can
crash if executed repeatedly from plan cache.
In the back branches, we'll just apply a narrow band-aid for that,
but in HEAD it seems prudent to have a more principled fix that
will close off the possibility of other similar bugs in future.
Hence, let's hoist the responsibility for doing copyObject up into
ProcessUtility from its children, thus ensuring that it happens for
all utility statement types.
Also, modify ProcessUtility's API so that its callers can tell it
whether a copy step is necessary. It turns out that in all cases,
the immediate caller knows whether the node tree is transient, so
this doesn't involve a huge amount of code thrashing. In this way,
while we lose a little bit in the execute-from-cache code path due
to sometimes copying node trees that wouldn't be mutated anyway,
we gain something in the simple-Query code path by not copying
throwaway node trees. Statements that are complex enough to be
expensive to copy are almost certainly ones that would have to be
copied anyway, so the loss in the cache code path shouldn't be much.
(Note that this whole problem applies only to utility statements.
Optimizable statements don't have the issue because we long ago made
the executor treat Plan trees as read-only. Perhaps someday we will
make utility statement execution act likewise, but I'm not holding
my breath.)
Discussion: https://postgr.es/m/931771.1623893989@sss.pgh.pa.us
Discussion: https://postgr.es/m/17053-3ca3f501bbc212b4@postgresql.org
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The fast default code added in Release 11 omitted to check that the
table a fast default was being added to was a plain table. Thus one
could be added to a foreign table, which predicably blows up. Here we
perform that check.
In addition, on the back branches, since some of these might have
escaped into the wild, if we encounter a missing value for
an attribute of something other than a plain table we ignore it.
Fixes bug #17056
Backpatch to release 11,
Reviewed by: Andres Freund, Álvaro Herrera and Tom Lane
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Commit d75288fb27 made WAL archiver process an auxiliary process.
An auxiliary process needs to handle barrier events but the commit
forgot to make archiver process do that.
Reported-by: Thomas Munro
Author: Fujii Masao
Reviewed-by: Thomas Munro
Discussion: https://postgr.es/m/CA+hUKGLah2w1pWKHonZP_+EQw69=q56AHYwCgEN8GDzsRG_Hgw@mail.gmail.com
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Author: Daniel Gustafsson
Discussion: https://postgr.es/m/CE12DD5C-4BB3-4166-BC9A-39779568734C@yesql.se
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One of the error paths left *members uninitialized. That's not a live
bug, because most callers don't look at *members when the function
returns -1, but let's be tidy. One caller, in heap_lock_tuple(), does
"if (members != NULL) pfree(members)", but AFAICS it never passes an
invalid 'multi' value so it should not reach that error case.
The callers are also a bit inconsistent in their expectations.
heap_lock_tuple() pfrees the 'members' array if it's not-NULL, others
pfree() it if "nmembers >= 0", and others if "nmembers > 0". That's
not a live bug either, because the function should never return 0, but
add an Assert for that to make it more clear. I left the callers alone
for now.
I also moved the line where we set *nmembers. It wasn't wrong before,
but I like to do that right next to the 'return' statement, to make it
clear that it's always set on return.
Also remove one unreachable return statement after ereport(ERROR), for
brevity and for consistency with the similar if-block right after it.
Author: Greg Nancarrow with the additional changes by me
Backpatch-through: 9.6, all supported versions
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In a synchronous logical setup, locking [user] catalog tables can cause
deadlock. This is because logical decoding of transactions can lock
catalog tables to access them so exclusively locking those in transactions
can lead to deadlock. To avoid this users must refrain from having
exclusive locks on catalog tables.
Author: Takamichi Osumi
Reviewed-by: Vignesh C, Amit Kapila
Backpatch-through: 9.6
Discussion: https://www.postgresql.org/message-id/20210222222847.tpnb6eg3yiykzpky%40alap3.anarazel.de
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When stuffing a plan from the plancache into a Portal, one is
not supposed to risk throwing an error between GetCachedPlan and
PortalDefineQuery; if that happens, the plan refcount incremented
by GetCachedPlan will be leaked. I managed to break this rule
while refactoring code in 9dbf2b7d7. There is no visible
consequence other than some memory leakage, and since nobody is
very likely to trigger the relevant error conditions many times
in a row, it's not surprising we haven't noticed. Nonetheless,
it's a bug, so rearrange the order of operations to remove the
hazard.
Noted on the way to looking for a better fix for bug #17053.
This mistake is pretty old, so back-patch to all supported
branches.
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Commit b676ac443b optimized handling of tuple slots with bulk inserts
into foreign tables, so that the slots are initialized only once and
reused for all batches. The data was however copied into the slots only
after the initialization, inserting duplicate values when the slot gets
reused. Fixed by moving the ExecCopySlot outside the init branch.
The existing postgres_fdw tests failed to catch this due to inserting
data into foreign tables without unique indexes, and then checking only
the number of inserted rows. This adds a new test with both a unique
index and a check of inserted values.
Reported-by: Alexander Pyhalov
Discussion: https://postgr.es/m/7a8cf8d56b3d18e5c0bccd6cd42d04ac%40postgrespro.ru
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I started out with the goal of reporting ERRCODE_CONNECTION_FAILURE
when walrcv_connect() fails, but as I looked around I realized that
whoever wrote this code was of the opinion that errcodes are purely
optional. That's not my understanding of our project policy. Hence,
make sure that an errcode is provided in each ereport that (a) is
ERROR or higher level and (b) isn't arguably an internal logic error.
Also fix some very dubious existing errcode assignments.
While this is not per policy, it's also largely cosmetic, since few
of these cases could get reported to applications. So I don't
feel a need to back-patch.
Discussion: https://postgr.es/m/2189704.1623512522@sss.pgh.pa.us
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Since commit c24dcd0cfd, we have been using pg_pread() to read the WAL
file, which doesn't change the seek position (unless we fall back to
the implementation in src/port/pread.c). Update comment accordingly.
Backpatch-through: 12, where we started to use pg_pread()
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This should have been updated in 533e9c6b0, but it was overlooked.
Given the lack of complaints, I won't bother back-patching.
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aborted-keyrevoke_2.out was apparently needed when it was added (in
commit 0ac5ad513) to handle the case of serializable transaction mode.
However, the output in serializable mode actually matches the regular
aborted-keyrevoke.out file, and AFAICT has done so for a long time.
There's no need to keep dragging this variant along.
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TestLib::perl2host can take a file argument as well as a directory
argument, so that code becomes substantially simpler. Also add comments
on why we're using forward slashes, and why we're setting
PERL_BADLANG=0.
Discussion: https://postgr.es/m/e9947bcd-20ee-027c-f0fe-01f736b7e345@dunslane.net
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Reported-by: Tom Lane
Discussion: https://postgr.es/m/CAPpHfdvcnw3x7jdV3r52p4%3D5S4WUxBCzcQKB3JukQHoicv1LSQ%40mail.gmail.com
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Bugfix commit 5fc89376 effectively made the lock_waiter_detected field
from vacuumlazy.c's global state struct into private state owned by
lazy_truncate_heap(). Finish this off by replacing the struct field
with a local variable.
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