| Commit message (Collapse) | Author | Age |
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An upcoming patch by Melanie Plageman does some refactoring work in this
area. Run pgindent on that file now before making any changes so that
it's easier to maintain/evolve each of the individual patches doing the
refactor work. Additionally, add a few new required typedefs to the list
to make it easier to do future pgindent runs on this file during the
refactor work.
Discussion: https://postgr.es/m/CAAKRu_YSOnhKsDyFcqJsKtBSrd32DP-jjXmv7hL0BPD-z0TGXQ@mail.gmail.com
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Commit c4649cce39 removed the "shared" and "ntapes" arguments, but the
comment still talked about "shared". It also talked about "a shared
file handle", which was technically correct because even before commit
c4649cce39, the "shared file handle" referred to the "fileset"
argument, not "shared". But it was very confusing. Improve the
comment.
Also add a comment on what the "preallocate" argument does.
Backpatch to v15, just to make backpatching other patches easier in
the future.
Discussion: https://www.postgresql.org/message-id/af989685-91d5-aad4-8f60-1d066b5ec309@enterprisedb.com
Reviewed-by: Peter Eisentraut
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Per buildfarm member mandrill, it seems that
max_parallel_workers_per_gather may not always be set to the default value
of 2 when the new test added in 16fd03e95 is executed. Here let's just
explicitly set that to 2 so that the planner never opts to use more than
that many parallel workers.
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This adds combine, serial and deserial functions for the array_agg() and
string_agg() aggregate functions, thus allowing these aggregates to
partake in partial aggregations. This allows both parallel aggregation to
take place when these aggregates are present and also allows additional
partition-wise aggregation plan shapes to include plans that require
additional aggregation once the partially aggregated results from the
partitions have been combined.
Author: David Rowley
Reviewed-by: Andres Freund, Tomas Vondra, Stephen Frost, Tom Lane
Discussion: https://postgr.es/m/CAKJS1f9sx_6GTcvd6TMuZnNtCh0VhBzhX6FZqw17TgVFH-ga_A@mail.gmail.com
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Enforce wal_retrieve_retry_interval on a per-subscription basis,
rather than globally, and arrange to skip that delay in case of
an intentional worker exit. This probably makes little difference
in the field, where apply workers wouldn't be restarted often;
but it has a significant impact on the runtime of our logical
replication regression tests (even though those tests use
artificially-small wal_retrieve_retry_interval settings already).
Nathan Bossart, with mostly-cosmetic editorialization by me
Discussion: https://postgr.es/m/20221122004119.GA132961@nathanxps13
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The motivation for this change is that when pg_dump dumps a
partitioned index that's marked REPLICA IDENTITY, it generates a
command sequence that applies REPLICA IDENTITY before the partitioned
index has been marked valid, causing restore to fail. We could
perhaps change pg_dump to not do it like that, but that would be
difficult and would not fix existing dump files with the problem.
There seems to be very little reason for the backend to disallow
this anyway --- the code ignores indisreplident when the index
isn't valid --- so instead let's fix it by allowing the case.
Commit 9511fb37a previously expressed a concern that allowing
indisreplident to be set on invalid indexes might allow us to
wind up in a situation where a table could have indisreplident
set on multiple indexes. I'm not sure I follow that concern
exactly, but in any case the only way that could happen is because
relation_mark_replica_identity is too trusting about the existing set
of markings being valid. Let's just rip out its early-exit code path
(which sure looks like premature optimization anyway; what are we
doing expending code to make redundant ALTER TABLE ... REPLICA
IDENTITY commands marginally faster and not-redundant ones marginally
slower?) and fix it to positively guarantee that no more than one
index is marked indisreplident.
The pg_dump failure can be demonstrated in all supported branches,
so back-patch all the way. I chose to back-patch 9511fb37a as well,
just to keep indisreplident handling the same in all branches.
Per bug #17756 from Sergey Belyashov.
Discussion: https://postgr.es/m/17756-dd50e8e0c8dd4a40@postgresql.org
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When the length was too short, the server read outside the allocation.
That yielded the same log noise as sending the correct length with
(backendPID,cancelAuthCode) matching nothing. Change to a message about
the unexpected length. Given the attacker's lack of control over the
memory layout and the general lack of diversity in memory layouts at the
code in question, we doubt a would-be attacker could cause a segfault.
Hence, while the report arrived via security@postgresql.org, this is not
a vulnerability. Back-patch to v11 (all supported versions).
Andrey Borodin, reviewed by Tom Lane. Reported by Andrey Borodin.
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Until now we used struct timespec for instr_time on all platforms but
windows. Using struct timespec causes a fair bit of memory (struct timeval is
16 bytes) and runtime overhead (much more complicated additions). Instead we
can convert the time to nanoseconds in INSTR_TIME_SET_CURRENT(), making the
remaining operations cheaper.
Representing time as int64 nanoseconds provides sufficient range, ~292 years
relative to a starting point (depending on clock source, relative to the unix
epoch or the system's boot time). That'd not be sufficient for calendar time
stored on disk, but is plenty for runtime interval time measurement.
On windows instr_time already is represented as cycles. It might make sense to
represent time as cycles on other platforms as well, as using cycle
acquisition instructions like rdtsc directly can reduce the overhead of time
acquisition substantially. This could be done in a fairly localized manner as
the code stands after this commit.
Because the windows and non-windows paths are now more similar, use a common
set of macros. To make that possible, most of the use of LARGE_INTEGER had to
be removed, which looks nicer anyway.
To avoid users of the API relying on the integer representation, we wrap the
64bit integer inside struct struct instr_time.
Author: Andres Freund <andres@anarazel.de>
Author: Lukas Fittl <lukas@fittl.com>
Author: David Geier <geidav.pg@gmail.com>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/20230113195547.k4nlrmawpijqwlsa@awork3.anarazel.de
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These are all not necessary from a correctness POV. However, in the near
future instr_time will be simplified to an int64, at which point gcc would
otherwise start to warn about the changed places.
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/20230116023639.rn36vf6ajqmfciua@awork3.anarazel.de
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This is similar to 835d476, except that this one is to add node
attributes related to query jumbling and avoid long lines in the headers
and in the node structures changed by this commit.
Reviewed-by: Peter Eisentraut
Discussion: https://postgr.es/m/Y5BHOUhX3zTH/ig6@paquier.xyz
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This will ease a follow-up move that will generate automatically this
code. The C file is renamed, for consistency with the node-related
files whose code are generated by gen_node_support.pl:
- queryjumble.c -> queryjumblefuncs.c
- utils/queryjumble.h -> nodes/queryjumble.h
Per a suggestion from Peter Eisentraut.
Reviewed-by: Peter Eisentraut
Discussion: https://postgr.es/m/Y5BHOUhX3zTH/ig6@paquier.xyz
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It creates a new predefined role.
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This provides a way to reserve connection slots for non-superusers.
The slots reserved via the new GUC are available only to users who
have the new predefined role pg_use_reserved_connections.
superuser_reserved_connections remains as a final reserve in case
reserved_connections has been exhausted.
Patch by Nathan Bossart. Reviewed by Tushar Ahuja and by me.
Discussion: http://postgr.es/m/20230119194601.GA4105788@nathanxps13
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This is in preparation for adding a new reserved_connections GUC,
but aligning the GUC name with the variable name is also a good
idea on general principle.
Patch by Nathan Bossart. Reviewed by Tushar Ahuja and by me.
Discussion: http://postgr.es/m/20230119194601.GA4105788@nathanxps13
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Commit ea92368cd1da1e290f9ab8efb7f60cb7598fc310 made max_wal_senders
a separate pool of backends from max_connections, but the documentation
and error message for superuser_reserved_connections weren't updated
at the time, and as a result are somewhat misleading. Update.
This is arguably a back-patchable bug fix, but because it seems quite
minor, no back-patch.
Patch by Nathan Bossart. Reviewed by Tushar Ahuja and by me.
Discussion: http://postgr.es/m/20230119194601.GA4105788@nathanxps13
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Prior patches got rid of all the uses of SHM_QUEUE. ilist.h style lists are
more widely used and have an easier to use interface. As there are no users
left, remove SHM_QUEUE.
Reviewed-by: Thomas Munro <thomas.munro@gmail.com> (in an older version)
Discussion: https://postgr.es/m/20221120055930.t6kl3tyivzhlrzu2@awork3.anarazel.de
Discussion: https://postgr.es/m/20200211042229.msv23badgqljrdg2@alap3.anarazel.de
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Part of a series to remove SHM_QUEUE. ilist.h style lists are more widely used
and have an easier to use interface.
Reviewed-by: Thomas Munro <thomas.munro@gmail.com> (in an older version)
Discussion: https://postgr.es/m/20221120055930.t6kl3tyivzhlrzu2@awork3.anarazel.de
Discussion: https://postgr.es/m/20200211042229.msv23badgqljrdg2@alap3.anarazel.de
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While pg_hba.conf has support for non-literal username matches, and
this commit extends the capabilities that are supported for the
PostgreSQL user listed in an ident entry part of pg_ident.conf, with
support for:
1. The "all" keyword, where all the requested users are allowed.
2. Membership checks using the + prefix.
3. Using a regex to match against multiple roles.
1. is a feature that has been requested by Jelte Fennema, 2. something
that has been mentioned independently by Andrew Dunstan, and 3. is
something I came up with while discussing how to extend the first one,
whose implementation is facilitated by 8fea868.
This allows matching certain system users against many different
postgres users with a single line in pg_ident.conf. Without this, one
would need one line for each of the postgres users that a system user
can log in as, which can be cumbersome to maintain.
Tests are added to the TAP test of peer authentication to provide
coverage for all that.
Note that this introduces a set of backward-incompatible changes to be
able to detect the new patterns, for the following cases:
- A role named "all".
- A role prefixed with '+' characters, which is something that would not
have worked in HBA entries anyway.
- A role prefixed by a slash character, similarly to 8fea868.
Any of these can be still be handled by using quotes in the Postgres
role defined in an ident entry.
A huge advantage of this change is that the code applies the same checks
for the Postgres roles in HBA and ident entries, via the common routine
check_role().
**This compatibility change should be mentioned in the release notes.**
Author: Jelte Fennema
Discussion: https://postgr.es/m/DBBPR83MB0507FEC2E8965012990A80D0F7FC9@DBBPR83MB0507.EURPRD83.prod.outlook.com
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If the public schema has a non-default owner (perhaps due to
dropping and recreating it) then use of pg_dump's "--if-exists"
option results in a warning message:
warning: could not find where to insert IF EXISTS in statement "-- *not* dropping schema, since initdb creates it"
This is harmless since the dump output is the same either way,
but nonetheless it's undesirable. It's the fault of commit
a7a7be1f2, which created situations where a TOC entry's "defn"
or "dropStmt" fields could be just comments. Although that
commit fixed up the kluges in pg_backup_archiver.c that munge defn
strings, it missed doing so for the one that munges dropStmts.
Per bug# 17753 from Justin Zhang.
Discussion: https://postgr.es/m/17753-9c8773631747ee1c@postgresql.org
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This adjusts a few places which were appending a string constant
containing spaces onto a StringInfo. We have appendStringInfoSpaces for
that job, so let's use that instead.
For the change to jsonb.c's add_indent() function, appendStringInfoString
was being called inside a loop to append 4 spaces on each loop. This
meant that enlargeStringInfo would get called once per loop. Here it
should be much more efficient to get rid of the loop and just calculate
the number of spaces with "level * 4" and just append all the spaces in
one go.
Here we additionally adjust the appendStringInfoSpaces function so it
makes use of memset rather than a while loop to apply the required spaces
to the StringInfo. One of the problems with the while loop was that it
was incrementing one variable and decrementing another variable once per
loop. That's more work than what's required to get the job done. We may
as well use memset for this rather than trying to optimize the existing
loop. Some testing has shown memset is faster even for very small sizes.
Discussion: https://postgr.es/m/CAApHDvp_rKkvwudBKgBHniNRg67bzXVjyvVKfX0G2zS967K43A@mail.gmail.com
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Sirisha Chamarthi and Kyotaro Horiguchi
Discussion: https://postgr.es/m/CAKrAKeXt-=bgm=d+EDmcC9kWoikp8kbVb3LH0K3K+AGGsykpHQ@mail.gmail.com
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This patch largely reverts what I did in commits c9b0c678d and
78e73e875. The maximum cover length limit that I added in 78e73e875
(to band-aid over c9b0c678d's performance issues) creates too many
user-visible behavior discrepancies, as complained of for example in
bug #17691. The real problem with hlCover() is not what I thought
at the time, but more that it seems to have been designed with only
AND tsquery semantics in mind. It doesn't work quite right for OR,
and even less so for NOT or phrase queries. However, we can improve
that situation by building a variant of TS_execute() that returns a
list of match locations. We already get an ExecPhraseData struct
representing match locations for the primitive case of a simple match,
as well as one for a phrase match; we just need to add some logic to
combine these for AND and OR operators. The result is a list of
ExecPhraseDatas, which hlCover can regard as having simple AND
semantics, so that its old algorithm works correctly.
There's still a lot not to like about ts_headline's behavior, but
I think the remaining issues have to do with the heuristics used
in mark_hl_words and mark_hl_fragments (which, likewise, were not
revisited when phrase search was added). Improving those is a task
for another day.
Patch by me; thanks to Alvaro Herrera for review.
Discussion: https://postgr.es/m/840.1669405935@sss.pgh.pa.us
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When ending recovery based on recovery_target_xid matching with
recovery_target_inclusive = off, we printed an incorrect timestamp
(always 2000-01-01) in the "recovery stopping before ... transaction"
log message. This is a consequence of sloppy refactoring in
c945af80c: the code to fetch recordXtime out of the commit/abort
record used to be executed unconditionally, but it was changed
to get called only in the RECOVERY_TARGET_TIME case. We need only
flip the order of operations to restore the intended behavior.
Per report from Torsten Förtsch. Back-patch to all supported
branches.
Discussion: https://postgr.es/m/CAKkG4_kUevPqbmyOfLajx7opAQk6Cvwkvx0HRcFjSPfRPTXanA@mail.gmail.com
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RelOptInfo.userid is the same for all relations in a given inheritance
tree, so the code in examine_variable() and example_simple_variable()
that repeats the ACL checks on the root parent rel instead of a given
leaf child relations need not recompute userid too.
Author: Amit Langote <amitlangote09@gmail.com>
Reported-by: Justin Pryzby <pryzby@telsasoft.com>
Discussion: https://postgr.es/m/20221210201753.GA27893@telsasoft.com
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This is a follow-up to c8ad4d81.
Author: Aleksander Alekseev
Discussion: https://www.postgresql.org/message-id/flat/CAJ7c6TM084Ai_8%3DfZaWtULJBLtT1bgzL%3Dk9vHMYom3eyZsekAA%40mail.gmail.com
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This is wrong since 88e9823, that has switched the WAL sizing
configuration from checkpoint_segments to min_wal_size and
max_wal_size. This missed the recalculation of the internal value of
the internal "CheckPointSegments", that works as a mapping of the old
GUC checkpoint_segments, on reload, for example, and it controls the
timing of checkpoints depending on the volume of WAL generated.
Most users tend to leave checkpoint_completion_target at 0.9 to smooth
the I/O workload, which is why I guess this has gone unnoticed for so
long, still it can be useful to tweak and reload the value dynamically
in some cases to control the timing of checkpoints.
Author: Bharath Rupireddy
Discussion: https://postgr.es/m/CALj2ACXgPPAm28mruojSBno+F_=9cTOOxHAywu_dfZPeBdybQw@mail.gmail.com
Backpatch-through: 11
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No buildfarm members have reported that yet, but a recently-refreshed
Debian host did.
Reviewed-by: Andrew Dunstan
Discussion: https://postgr.es/m/Y8ey5z4Nav62g4/K@paquier.xyz
Backpatch-through: 11
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Turns out the compression.sql test creates a view that needs
to be adjusted in the wake of 47bb9db75 --- except that without
--with-lz4, it fails to create the view at all, so I'd not
noticed this in testing.
Per buildfarm member crake.
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This delta in expected output wasn't spotted in any previous
testing of the patch. Reported by Andres Freund.
Discussion: https://postgr.es/m/20230118195855.7yjc4mminmv7iyy5@awork3.anarazel.de
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Part of a series to remove SHM_QUEUE. ilist.h style lists are more widely used
and have an easier to use interface.
Reviewed-by: Thomas Munro <thomas.munro@gmail.com> (in an older version)
Discussion: https://postgr.es/m/20221120055930.t6kl3tyivzhlrzu2@awork3.anarazel.de
Discussion: https://postgr.es/m/20200211042229.msv23badgqljrdg2@alap3.anarazel.de
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Part of a series to remove SHM_QUEUE. ilist.h style lists are more widely used
and have an easier to use interface.
As PROC_QUEUE is now unused, remove it.
Reviewed-by: Thomas Munro <thomas.munro@gmail.com> (in an older version)
Discussion: https://postgr.es/m/20221120055930.t6kl3tyivzhlrzu2@awork3.anarazel.de
Discussion: https://postgr.es/m/20200211042229.msv23badgqljrdg2@alap3.anarazel.de
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These allow to test whether an element is in a list by checking whether
prev/next are NULL. Needed to replace SHMQueueIsDetached() when converting
from SHM_QUEUE to ilist.h style lists.
Reviewed-by: Thomas Munro <thomas.munro@gmail.com>
Discussion: https://postgr.es/m/20221120055930.t6kl3tyivzhlrzu2@awork3.anarazel.de
Discussion: https://postgr.es/m/20200211042229.msv23badgqljrdg2@alap3.anarazel.de
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In c8ad4d8166a dlist_member_check()'s arguments were made const. Unfortunately
the implementation of dlist_member_check() used dlist_foreach(), which
currently doesn't work for const lists.
As a workaround, open-code the list iteration. The other check functions
already do so.
Discussion: https://postgr.es/m/20230118182214.co7dp4oahiunwg57@awork3.anarazel.de
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The rule system needs "old" and/or "new" pseudo-RTEs in rule actions
that are ON INSERT/UPDATE/DELETE. Historically it's put such entries
into the ON SELECT rules of views as well, but those are really quite
vestigial. The only thing we've used them for is to carry the
view's relid forward to AcquireExecutorLocks (so that we can
re-lock the view to verify it hasn't changed before re-using a plan)
and to carry its relid and permissions data forward to execution-time
permissions checks. What we can do instead of that is to retain
these fields of the RTE_RELATION RTE for the view even after we
convert it to an RTE_SUBQUERY RTE. This requires a tiny amount of
extra complication in the planner and AcquireExecutorLocks, but on
the other hand we can get rid of the logic that moves that data from
one place to another.
The principal immediate benefit of doing this, aside from a small
saving in the pg_rewrite data for views, is that these pseudo-RTEs
no longer trigger ruleutils.c's heuristic about qualifying variable
names when the rangetable's length is more than 1. That results
in quite a number of small simplifications in regression test outputs,
which are all to the good IMO.
Bump catversion because we need to dump a few more fields of
RTE_SUBQUERY RTEs. While those will always be zeroes anyway in
stored rules (because we'd never populate them until query rewrite)
they are useful for debugging, and it seems like we'd better make
sure to transmit such RTEs accurately in plans sent to parallel
workers. I don't think the executor actually examines these fields
after startup, but someday it might.
This is a second attempt at committing 1b4d280ea. The difference
from the first time is that now we can add some filtering rules to
AdjustUpgrade.pm to allow cross-version upgrade testing to pass
despite all the cosmetic changes in CREATE VIEW outputs.
Amit Langote (filtering rules by me)
Discussion: https://postgr.es/m/CA+HiwqEf7gPN4Hn+LoZ4tP2q_Qt7n3vw7-6fJKOf92tSEnX6Gg@mail.gmail.com
Discussion: https://postgr.es/m/891521.1673657296@sss.pgh.pa.us
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Avoid explicitly grouping by columns that we know are redundant
for sorting, for example we need group by only one of x and y in
SELECT ... WHERE x = y GROUP BY x, y
This comes up more often than you might think, as shown by the
changes in the regression tests. It's nearly free to detect too,
since we are just piggybacking on the existing logic that detects
redundant pathkeys. (In some of the existing plans that change,
it's visible that a sort step preceding the grouping step already
didn't bother to sort by the redundant column, making the old plan
a bit silly-looking.)
To do this, build processed_groupClause and processed_distinctClause
lists that omit any provably-redundant sort items, and consult those
not the originals where relevant. This means that within the
planner, one should usually consult root->processed_groupClause or
root->processed_distinctClause if one wants to know which columns
are to be grouped on; but to check whether grouping or distinct-ing
is happening at all, check non-NIL-ness of parse->groupClause or
parse->distinctClause. This is comparable to longstanding rules
about handling the HAVING clause, so I don't think it'll be a huge
maintenance problem.
nodeAgg.c also needs minor mods, because it's now possible to generate
AGG_PLAIN and AGG_SORTED Agg nodes with zero grouping columns.
Patch by me; thanks to Richard Guo and David Rowley for review.
Discussion: https://postgr.es/m/185315.1672179489@sss.pgh.pa.us
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Add leader_pid to pg_stat_subscription. leader_pid is the process ID of
the leader apply worker if this process is a parallel apply worker. If
this field is NULL, it indicates that the process is a leader apply
worker or a synchronization worker. The new column makes it easier to
distinguish parallel apply workers from other kinds of workers and helps
to identify the leader for the parallel workers corresponding to a
particular subscription.
Additionally, update the leader_pid column in pg_stat_activity as well to
display the PID of the leader apply worker for parallel apply workers.
Author: Hou Zhijie
Reviewed-by: Peter Smith, Sawada Masahiko, Amit Kapila, Shveta Mallik
Discussion: https://postgr.es/m/CAA4eK1+wyN6zpaHUkCLorEWNx75MG0xhMwcFhvjqm2KURZEAGw@mail.gmail.com
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Presently, restore_command uses a different code path than
archive_cleanup_command and recovery_end_command. These code paths
are similar and can be easily combined, as long as it is possible to
identify if a command should:
- Issue a FATAL on signal.
- Exit immediately on SIGTERM.
While on it, this removes src/common/archive.c and its associated
header. Since the introduction of c96de2c, BuildRestoreCommand() has
become a simple wrapper of replace_percent_placeholders() able to call
make_native_path(). This simplifies shell_restore.c as long as
RestoreArchivedFile() includes a call to make_native_path().
Author: Nathan Bossart
Reviewed-by: Andres Freund, Michael Paquier
Discussion: https://postgr.es/m/20221227192449.GA3672473@nathanxps13
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This makes sure that the internal logic of these functions does not
attempt to change the value of the arguments constified, and it removes
one unconstify() in basic_archive.c.
Author: Nathan Bossart
Reviewed-by: Andrew Dunstan, Peter Eisentraut
Discussion: https://postgr.es/m/20230114231126.GA2580330@nathanxps13
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It's likely worth adding some automated way of preventing further
omissions. We're discussing how to best do that.
Reported-by: Justin Pryzby <pryzby@telsasoft.com>
Discussion: https://postgr.es/m/20230117173509.GV9837@telsasoft.com
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test_extensions' test_ext_cine extension has the same upgrade hazard
as test_ext7: the regression test leaves it in an updated state
from which no downgrade path to default is provided. This causes
the update_extensions.sql script helpfully provided by pg_upgrade
to fail. So drop it in cross-version-upgrade testing.
Not entirely sure how come I didn't hit this in testing yesterday;
possibly I'd built the upgrade reference databases with
testmodules-install-check disabled.
Backpatch to v10 where this module was introduced.
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Instead of half a dozen of mostly-duplicate conditional branches,
write one common one that can handle most catalogs. We already have
all the information we need, such as which system catalog corresponds
to which catalog table and which column is the ACL column.
Reviewed-by: Nathan Bossart <nathandbossart@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/504bc485-6bd6-dd1b-fe10-e7351aeb310d@enterprisedb.com
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This was erroneous, because AggregateRelationId has no OID, so it
cannot be part of an extension directly. (Aggregates are registered
via pg_proc.) No harm in practice, but better to make it correct.
Reviewed-by: Nathan Bossart <nathandbossart@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/504bc485-6bd6-dd1b-fe10-e7351aeb310d@enterprisedb.com
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Ranier Vilela
Reviewed by Justin Pryzby
Discussion: https://www.postgresql.org/message-id/CAEudQAp2R2fbbi0OHHhv_n4%3DCh0t1VtjObR9YMqtGKHJ%2BfaUFQ%40mail.gmail.com
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Remove some code guarded by IS_MINUS() or IS_PLUS(), where the entire
stanza is inside an else-block where both of these are false. This
should slightly improve test coverage.
While at it, remove coding that apparently assumes that unsetting a
bit is so expensive that we have to first check if it's already set
in the first place.
Per Coverity report from Ranier Vilela
Analysis and review by Justin Pryzby
Discussion: https://www.postgresql.org/message-id/20221223010818.GP1153%40telsasoft.com
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The code that decides the apply action missed to handle non-transactional
messages and we didn't catch it in our testing as currently such messages
are simply ignored by the apply worker. This was introduced by changes in
commit 216a784829.
While testing this, I noticed that we forgot to reset stream_xid after
processing the stream stop message which could also result in the wrong
apply action after the fix for non-transactional messages.
In passing, change assert to elog for unexpected apply action in some of
the routines so as to catch the problems in the production environment, if
any.
Reported-by: Tomas Vondra
Author: Amit Kapila
Reviewed-by: Tomas Vondra, Sawada Masahiko, Hou Zhijie
Discussion: https://postgr.es/m/984ff689-adde-9977-affe-cd6029e850be@enterprisedb.com
Discussion: https://postgr.es/m/CAA4eK1+wyN6zpaHUkCLorEWNx75MG0xhMwcFhvjqm2KURZEAGw@mail.gmail.com
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Author: Osumi Takamichi
Discussion: https://postgr.es/m/TYCPR01MB83737EA140C79B7D099F65E8EDC69@TYCPR01MB8373.jpnprd01.prod.outlook.com
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Entries of pg-user in pg_ident.conf that are quoted and include '\1'
allow a replacement from a subexpression in a system user regexp. This
commit adds a test to track this behavior and a note in the
documentation, as it could be affected by the use of an AuthToken for
the pg-user in the IdentLines parsed.
This subject has come up in the discussion aimed at extending the
support of pg-user in ident entries for more patterns.
Author: Jelte Fennema
Discussion: https://postgr.es/m/CAGECzQRNow4MwkBjgPxywXdJU_K3a9+Pm78JB7De3yQwwkTDew@mail.gmail.com
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In 1349d2790, we gave the planner the ability to provide ORDER BY/DISTINCT
Aggrefs with presorted input so that nodeAgg would not have to perform
sorts during execution. That commit failed to properly consider the
implications of if the Aggref had a volatile function in its ORDER
BY/DISTINCT clause. As it happened, this resulted in an ERROR about the
volatile function being missing from the targetlist.
Here, instead of adding the volatile function to the targetlist, we just
never consider an Aggref with a volatile function in its ORDER BY/DISTINCT
clause when choosing which Aggrefs we should sort by. We do this as if we
were to choose a plan which provided these aggregates with presorted
input, then if there were many such aggregates which could all share the
same sort order, then it may be surprising if they all shared the same
sort sometimes and didn't at other times when some other set of aggregates
were given presorted results. We can avoid this inconsistency by just
never providing these volatile function aggregates with presorted input.
Reported-by: Dean Rasheed
Discussion: https://postgr.es/m/CAEZATCWETioXs5kY8vT6BVguY41_wD962VDk=u_Nvd7S1UXzuQ@mail.gmail.com
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To test pg_upgrade across major PG versions, we have to be able to
modify or drop any old objects with no-longer-supported properties,
and we have to be able to deal with cosmetic changes in pg_dump output.
Up to now, the buildfarm and pg_upgrade's own test infrastructure had
separate implementations of the former, and we had nothing but very
ad-hoc rules for the latter (including an arbitrary threshold on how
many lines of unchecked diff were okay!). This patch creates a Perl
module that can be shared by both those use-cases, and adds logic
that deals with pg_dump output diffs in a much more tightly defined
fashion.
This largely supersedes previous efforts in commits 0df9641d3,
9814ff550, and 62be9e4cd, which developed a SQL-script-based solution
for the task of dropping old objects. There was nothing fundamentally
wrong with that work in itself, but it had no basis for solving the
output-formatting problem. The most plausible way to deal with
formatting is to build a Perl module that can perform editing on the
dump files; and once we commit to that, it makes more sense for the
same module to also embed the knowledge of what has to be done for
dropping old objects.
Back-patch versions of the helper module as far as 9.2, to
support buildfarm animals that still test that far back.
It's also necessary to back-patch PostgreSQL/Version.pm,
because the new code depends on that. I fixed up pg_upgrade's
002_pg_upgrade.pl in v15, but did not look into back-patching
it further than that.
Tom Lane and Andrew Dunstan
Discussion: https://postgr.es/m/891521.1673657296@sss.pgh.pa.us
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Tighten up the way that visibilitymap_set() is called: request that both
the all-visible and all-frozen bits get set whenever the all-frozen bit
is set, regardless of what we think we know about the present state of
the all-visible bit. Also make sure that the page level PD_ALL_VISIBLE
flag is set in the same code path.
In practice there doesn't seem to be a concrete scenario in which the
previous approach could lead to inconsistencies. It was almost possible
in scenarios involving concurrent HOT updates from transactions that
abort, but (unlike pruning) freezing can never remove XIDs > VACUUM's
OldestXmin, even those from transactions that are known to have aborted.
That was protective here.
These issues have been around since commit a892234f83, which added the
all-frozen bit to the VM fork. There is no known live bug here, so no
backpatch.
In passing, add some defensive assertions to catch the issue, and stop
reading the existing state of the VM when setting the VM in VACUUM's
final heap pass. We already know that affected pages must have had at
least one LP_DEAD item before we set it LP_UNUSED, so there is no point
in reading the VM when it is set like this.
Author: Peter Geoghegan <pg@bowt.ie>
Reviewed-By: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/CAH2-WznuNGSzF8v6OsgjaC5aYsb3cZ6HW6MLm30X0d65cmSH6A@mail.gmail.com
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