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This is useless because these fields are not set anywhere before, so
we can assign them unconditionally. This also makes this more
consistent with ATExecAddColumn().
Reviewed-by: Alvaro Herrera <alvherre@alvh.no-ip.org>
Discussion: https://www.postgresql.org/message-id/flat/52a125e4-ff9a-95f5-9f61-b87cf447e4da@eisentraut.org
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Since we already have it, we might as well make full use of it,
instead of assembling ColumnDef by hand in several places.
Reviewed-by: Alvaro Herrera <alvherre@alvh.no-ip.org>
Discussion: https://www.postgresql.org/message-id/flat/52a125e4-ff9a-95f5-9f61-b87cf447e4da@eisentraut.org
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Discussion: https://www.postgresql.org/message-id/flat/52a125e4-ff9a-95f5-9f61-b87cf447e4da@eisentraut.org
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After commit b0bea38705, syslogger prints 63 warnings about failing to
close a listen socket at postmaster startup. That's because the
syslogger process forks before the ListenSockets array is initialized,
so ClosePostmasterPorts() calls "close(0)" 64 times. The first call
succeeds, because fd 0 is stdin.
This has been like this since commit 9a86f03b4e in version 13, which
moved the SysLogger_Start() call to before initializing ListenSockets.
We just didn't notice until commit b0bea38705 added the LOG message.
Reported by Michael Paquier and Jeff Janes.
Author: Michael Paquier
Discussion: https://www.postgresql.org/message-id/ZOvvuQe0rdj2slA9%40paquier.xyz
Discussion: https://www.postgresql.org/message-id/ZO0fgDwVw2SUJiZx@paquier.xyz#482670177eb4eaf4c9f03c1eed963e5f
Backpatch-through: 13
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Since its introduction in 10074651e335, pg_promote() has been returning
a false status in three cases:
- SIGUSR1 not sent to the postmaster process.
- Postmaster death during standby promotion.
- Standby not promoted within the specified wait time.
An application calling this function will have a hard time understanding
what a false state returned actually means.
Per discussion, this switches the two first states to fail rather than
return a "false" status, making the second case more consistent with the
existing CHECK_FOR_INTERRUPTS in the wait loop. False is only returned
when the promotion is not completed within the specified time (60s by
default).
Author: Ashutosh Sharma
Reviewed-by: Fujii Masao, Laurenz Albe, Michael Paquier
Discussion: https://postgr.es/m/CAE9k0P=QTrwptL0t4J0fuBRDDjgsT-0PVKd-ikd96i1hyL7Bcg@mail.gmail.com
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Make the primary messages more compact and make the detail messages
uniform. In initdb.c and pg_resetwal.c, use the newish
option_parse_int() to simplify some of the option parsing. For the
backend GUC wal_segment_size, add a GUC check hook to do the
verification instead of coding it in bootstrap.c. This might be
overkill, but that way the check is in the right place and it becomes
more self-documenting.
In passing, make pg_controldata use the logging API for warning
messages.
Reviewed-by: Aleksander Alekseev <aleksander@timescale.com>
Discussion: https://www.postgresql.org/message-id/flat/9939aa8a-d7be-da2c-7715-0a0b5535a1f7@eisentraut.org
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Noticed in passing, while hacking on a different patch touching this
area.
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OpenSSL in FIPS mode rejects several encrypted private keys used in
the test suites ssl and ssl_passphrase_callback. This is because they
are in a "traditional" OpenSSL format that uses MD5 for key
generation. The fix is to convert them to the more standard PKCS#8
format that uses SHA1 for key derivation.
This commit contains the converted keys, with the conversion done like
this:
openssl pkcs8 -topk8 -in src/test/modules/ssl_passphrase_callback/server.key -passin pass:FooBaR1 -out src/test/modules/ssl_passphrase_callback/server.key.new -passout pass:FooBaR1
mv src/test/modules/ssl_passphrase_callback/server.key.new src/test/modules/ssl_passphrase_callback/server.key
etc., as well as updated build rules to generate the keys in the new
format if they need to be regenerated.
Reviewed-by: Jacob Champion <jchampion@timescale.com>
Discussion: https://www.postgresql.org/message-id/flat/64de784b-8833-e055-3bd4-7420e6675351%40eisentraut.org
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Interval values now generate an error when the user has multiple
consecutive units or a unit without a value. Previously, it was
possible to specify multiple units consecutively which is contrary to
what the documentation allows, so it was possible to finish with
confusing interval values.
This is a follow-up of the work done in 165d581f146b.
Author: Joseph Koshakow
Reviewed-by: Jacob Champion, Gurjeet Singh, Reid Thompson
Discussion: https://postgr.es/m/CAAvxfHd-yNO+XYnUxL=GaNZ1n+eE0V-oE0+-cC1jdjdU0KS3iw@mail.gmail.com
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This commit Restrict the unit "ago" to only appear at the end of the
interval. According to the documentation, a direction can only be
defined at the end of an interval, but it was possible to define it in
the middle of the string or define it multiple times.
In spirit, this is similar to the error handling improvements done in
5b3c5953553b or bcc704b524904.
Author: Joseph Koshakow
Reviewed-by: Jacob Champion, Gurjeet Singh, Reid Thompson
Discussion: https://postgr.es/m/CAAvxfHd-yNO+XYnUxL=GaNZ1n+eE0V-oE0+-cC1jdjdU0KS3iw@mail.gmail.com
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This makes it easier to compare the lists visually with the
corresponding meson lists.
In passing, copy over some relevant comments from the makefiles to
meson.build.
Reviewed-by: Andres Freund <andres@anarazel.de>
Reviewed-by: Alvaro Herrera <alvherre@alvh.no-ip.org>
Discussion: https://www.postgresql.org/message-id/flat/a306be82-ee71-4554-d499-49a45a654396%40eisentraut.org
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This commit removes some dead code related to the unit type RESERV,
whose last use has been removed from the unit lookup table used for
intervals ("deltatktbl" in datetime.c) in 666cbae16da4. Before that,
RESERV was used as an equivalent of "invalid", but that's now
unreachable.
Author: Joseph Koshakow
Reviewed-by: Jacob Champion, Gurjeet Singh, Reid Thompson
Discussion: https://postgr.es/m/CAAvxfHd-yNO+XYnUxL=GaNZ1n+eE0V-oE0+-cC1jdjdU0KS3iw@mail.gmail.com
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This commit switches query jumbling so as prepared statement names are
treated as constants in DeallocateStmt. A boolean field is added to
DeallocateStmt to make a distinction between ALL and named prepared
statements, as "name" was used to make this difference before, NULL
meaning DEALLOCATE ALL.
Prior to this commit, DEALLOCATE was not tracked in pg_stat_statements,
for the reason that it was not possible to treat its name parameter as a
constant. Now that query jumbling applies to all the utility nodes,
this reason does not apply anymore.
Like 638d42a3c520, this can be a huge advantage for monitoring where
prepared statement names are randomly generated, preventing bloat in
pg_stat_statements. A couple of tests are added to track the new
behavior.
Author: Dagfinn Ilmari Mannsåker, Michael Paquier
Reviewed-by: Julien Rouhaud
Discussion: https://postgr.es/m/ZMhT9kNtJJsHw6jK@paquier.xyz
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Adding an extra LOG for connections that have not set an authn ID, like
when the "trust" authentication method is used, is useful for audit
purposes.
A couple of TAP tests for SSL and authentication need to be tweaked to
adapt to this new LOG generated, as some scenarios expected no logs but
they now get a hit.
Reported-by: Shaun Thomas
Author: Jacob Champion
Reviewed-by: Robert Haas, Michael Paquier
Discussion: https://postgr.es/m/CAFdbL1N7-GF-ZXKaB3XuGA+CkSmnjFvqb8hgjMnDfd+uhL2u-A@mail.gmail.com
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Commit 252dcb32 used cp -a, but apparently Solaris doesn't like that. Use cp
-RPp instead.
Author: Thomas Munro <thomas.munro@gmail.com>
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Discussion: https://postgr.es/m/CA+hUKGL10AoQVMMqgOJ8CTjoz9MLidD8ik2e8PibzLNMz0+aRg@mail.gmail.com
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Per buildfarm member Hippopotamus
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We now create contype='n' pg_constraint rows for not-null constraints.
We propagate these constraints to other tables during operations such as
adding inheritance relationships, creating and attaching partitions and
creating tables LIKE other tables. We also spawn not-null constraints
for inheritance child tables when their parents have primary keys.
These related constraints mostly follow the well-known rules of
conislocal and coninhcount that we have for CHECK constraints, with some
adaptations: for example, as opposed to CHECK constraints, we don't
match not-null ones by name when descending a hierarchy to alter it,
instead matching by column name that they apply to. This means we don't
require the constraint names to be identical across a hierarchy.
For now, we omit them for system catalogs. Maybe this is worth
reconsidering. We don't support NOT VALID nor DEFERRABLE clauses
either; these can be added as separate features later (this patch is
already large and complicated enough.)
psql shows these constraints in \d+.
pg_dump requires some ad-hoc hacks, particularly when dumping a primary
key. We now create one "throwaway" not-null constraint for each column
in the PK together with the CREATE TABLE command, and once the PK is
created, all those throwaway constraints are removed. This avoids
having to check each tuple for nullness when the dump restores the
primary key creation.
pg_upgrading from an older release requires a somewhat brittle procedure
to create a constraint state that matches what would be created if the
database were being created fresh in Postgres 17. I have tested all the
scenarios I could think of, and it works correctly as far as I can tell,
but I could have neglected weird cases.
This patch has been very long in the making. The first patch was
written by Bernd Helmle in 2010 to add a new pg_constraint.contype value
('n'), which I (Álvaro) then hijacked in 2011 and 2012, until that one
was killed by the realization that we ought to use contype='c' instead:
manufactured CHECK constraints. However, later SQL standard
development, as well as nonobvious emergent properties of that design
(mostly, failure to distinguish them from "normal" CHECK constraints as
well as the performance implication of having to test the CHECK
expression) led us to reconsider this choice, so now the current
implementation uses contype='n' again. During Postgres 16 this had
already been introduced by commit e056c557aef4, but there were some
problems mainly with the pg_upgrade procedure that couldn't be fixed in
reasonable time, so it was reverted.
In 2016 Vitaly Burovoy also worked on this feature[1] but found no
consensus for his proposed approach, which was claimed to be closer to
the letter of the standard, requiring an additional pg_attribute column
to track the OID of the not-null constraint for that column.
[1] https://postgr.es/m/CAKOSWNkN6HSyatuys8xZxzRCR-KL1OkHS5-b9qd9bf1Rad3PLA@mail.gmail.com
Author: Álvaro Herrera <alvherre@alvh.no-ip.org>
Author: Bernd Helmle <mailings@oopsware.de>
Reviewed-by: Justin Pryzby <pryzby@telsasoft.com>
Reviewed-by: Peter Eisentraut <peter.eisentraut@enterprisedb.com>
Reviewed-by: Dean Rasheed <dean.a.rasheed@gmail.com>
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Commit 2a8b40e36 introduces the worker type field for logical replication
workers, but forgot to reset the type when the worker exits. This can lead
to recognizing a stopped worker as a valid logical replication worker.
Fix it by resetting the worker type and additionally adding the safeguard
to not use LogicalRepWorker until ->in_use is verified.
Reported-by: Thomas Munro based on cfbot reports.
Author: Hou Zhijie, Alvaro Herrera
Reviewed-by: Amit Kapila
Discussion: http://postgr.es/m/CA+hUKGK2RQh4LifVgBmkHsCYChP-65UwGXOmnCzYVa5aAt4GWg@mail.gmail.com
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When running all (or just many) of our tests, a significant portion of both
CPU time and IO is spent running initdb. Most of those initdb runs don't
specify any options influencing properties of the created data directory.
Avoid most of that overhead by creating a "template" data directory, alongside
the temporary installation. Instead of running initdb, pg_regress and tap
tests can copy that data directory. When a tap test specifies options to
initdb, the template data directory is not used. That could be relaxed for
some options, but it's not clear it's worth the effort.
There unfortunately is some duplication between pg_regress.c and Cluster.pm,
but there are no easy ways of sharing that code without introducing additional
complexity.
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Discussion: https://postgr.es/m/20220120021859.3zpsfqn4z7ob7afz@alap3.anarazel.de
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Commit 7b378237aa added a status message to pg_upgrade that is 60
characters wide. Since the MESSAGE_WIDTH macro is currently set to
60, there is no space between this new status message and the "ok"
or "failed" indicator appended when the step completes. To fix
this problem, this commit increases the value of MESSAGE_WIDTH to
62.
Suggested-by: Bharath Rupireddy
Reviewed-by: Peter Eisentraut
Discussion: https://postgr.es/m/CALj2ACVVvk1cYLtWVxHv%3DZ1Ubq%3DUES9fhKbUU4c9k4W%2BfEDnbw%40mail.gmail.com
Backpatch-through: 16
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Revalidation of a plancache entry (after a cache invalidation event)
requires acquiring a snapshot. Normally that is harmless, but not
if the cached statement is one that needs to run without acquiring a
snapshot. We were already aware of that for TransactionStmts,
but for some reason hadn't extrapolated to the other statements that
PlannedStmtRequiresSnapshot() knows mustn't set a snapshot. This can
lead to unexpected failures of commands such as SET TRANSACTION
ISOLATION LEVEL. We can fix it in the same way, by excluding those
command types from revalidation.
However, we can do even better than that: there is no need to
revalidate for any statement type for which parse analysis, rewrite,
and plan steps do nothing interesting, which is nearly all utility
commands. To mechanize this, invent a parser function
stmt_requires_parse_analysis() that tells whether parse analysis does
anything beyond wrapping a CMD_UTILITY Query around the raw parse
tree. If that's what it does, then rewrite and plan will just
skip the Query, so that it is not possible for the same raw parse
tree to produce a different plan tree after cache invalidation.
stmt_requires_parse_analysis() is basically equivalent to the
existing function analyze_requires_snapshot(), except that for
obscure reasons that function omits ReturnStmt and CallStmt.
It is unclear whether those were oversights or intentional.
I have not been able to demonstrate a bug from not acquiring a
snapshot while analyzing these commands, but at best it seems mighty
fragile. It seems safer to acquire a snapshot for parse analysis of
these commands too, which allows making stmt_requires_parse_analysis
and analyze_requires_snapshot equivalent.
In passing this fixes a second bug, which is that ResetPlanCache
would exclude ReturnStmts and CallStmts from revalidation.
That's surely *not* safe, since they contain parsable expressions.
Per bug #18059 from Pavel Kulakov. Back-patch to all supported
branches.
Discussion: https://postgr.es/m/18059-79c692f036b25346@postgresql.org
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This code is insufficiently covered by tests, so add a few small test
cases to immortalize its behavior before it gets rewritten completely by
the project to catalog NOT NULL constraints.
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It's good hygiene if e.g. an extension launches a subprogram when
being loaded. We went through some effort to close them in the child
process in EXEC_BACKEND mode, but it's better to not hand them down to
the child process in the first place. We still need to close them
after fork when !EXEC_BACKEND, but it's a little simpler.
In the passing, LOG a message if closing the client connection or
listen socket fails. Shouldn't happen, but if it does, would be nice
to know.
Reviewed-by: Tristan Partin, Andres Freund, Thomas Munro
Discussion: https://www.postgresql.org/message-id/7a59b073-5b5b-151e-7ed3-8b01ff7ce9ef@iki.fi
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Update source code comment changes belonging to the changes in
6a6389a08b.
Discussion: https://www.postgresql.org/message-id/flat/75ae5875-3abc-dafc-8aec-73247ed41cde@eisentraut.org
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Commit 319bae9a renamed the GUC. Rename the check and assign functions
to match, and alphabetize.
Back-patch to 16.
Author: Peter Eisentraut <peter@eisentraut.org>
Discussion: https://postgr.es/m/2769341e-fa28-c2ee-3e4b-53fdcaaf2271%40eisentraut.org
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Having argument names makes it easier to understand how to use the
aggregate functions when inspecting them with \dfa or similar.
Author: Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>
Reviewed-by: Vik Fearing <vik@postgresfriends.org>
Reviewed-by: Jim Jones <jim.jones@uni-muenster.de>
Discussion: https://postgr.es/m/877cw3jl8y.fsf@wibble.ilmari.org
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The SnapBuildRestoreContents() used a const value in the error message to
indicate the size in bytes it was expecting to read from the serialized
snapshot file. Fix it by reporting the size that was actually passed.
Author: Hou Zhijie
Reviewed-by: Amit Kapila
Backpatch-through: 16
Discussion: http://postgr.es/m/OS0PR01MB5716D408364F7DF32221C08D941FA@OS0PR01MB5716.jpnprd01.prod.outlook.com
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Conditionals cannot be inside gettext trigger functions, they must be
applied outside.
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The parenthesized plural is unnecessary here and inconsistent with
nearby similar messages.
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The meson build scripts attempt to find files left over from configure
and fail, mentioning that "make maintainer-clean" should be run to remove
these. This seems to have been done for files generated from configure.
pg_config_paths.h is generated during the actual make build, so seems to
have been missed. This would result in compilation using the wrong
pg_config_paths.h file.
Here we just add this file to generated_sources_ac so that meson errors
out if pg_config_paths.h exists.
Likely this wasn't noticed before because make maintainer-clean will
remove pg_config_paths.h, however, people using the MSVC build scripts
are more likely to run into issues and they have to manually remove
these files and pg_config_paths.h wasn't listed as a conflicting file to
remove in the meson log.
Backpatch-through: 16, where meson support was added
Discussion: https://postgr.es/m/CAApHDvqjYOxZfmLKAOWKFEE7LOr9_E6UA6YNmx9r8nxStcS3gg@mail.gmail.com
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See prior commit for an explanation for the goal of the change and why it had
to be split into two commits.
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Reviewed-by: Nazir Bilal Yavuz <byavuz81@gmail.com>
Discussion: https://postgr.es/m/20230808021541.7lbzdefvma7qmn3w@awork3.anarazel.de
Backpatch: 15-, where CI support was added
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Missed in 260a1f18da.
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getprotobyname returns undefined on some CI machines. It's not clear
why. The code overall still works, but it raises a warning.
In PostgreSQL C code, we always call socket() with 0 for the protocol
argument, so we should be able to do the same in Perl (since the Perl
documentation says that the arguments of the socket function are the
same as in C). So do that, to avoid the issue.
Reviewed-by: Andrew Dunstan <andrew@dunslane.net>
Discussion: https://www.postgresql.org/message-id/flat/06f899fd-1826-05ab-42d6-adeb1fd5e200%40eisentraut.org
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_bt_allequalimage() does complicated things, so it's not OK to call it
in a critical section. Per buildfarm failure on 'prion', which uses
-DRELCACHE_FORCE_RELEASE -DCATCACHE_FORCE_RELEASE options.
Discussion: https://www.postgresql.org/message-id/6e5bbc08-cdfc-b2b3-9e23-1a914b9850a9@iki.fi
Backpatch-through: 16, like commit ccadf73163 that introduced this
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This commit introduces functions for converting numbers to their
equivalent binary and octal representations. Also, the base
conversion code for these functions and to_hex() has been moved to
a common helper function.
Co-authored-by: Eric Radman
Reviewed-by: Ian Barwick, Dag Lem, Vignesh C, Tom Lane, Peter Eisentraut, Kirk Wolak, Vik Fearing, John Naylor, Dean Rasheed
Discussion: https://postgr.es/m/Y6IyTQQ/TsD5wnsH%40vm3.eradman.com
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Some of the ambuildempty functions used smgrwrite() directly, followed
by smgrimmedsync(). A few small problems with that:
Firstly, one is supposed to use smgrextend() when extending a
relation, not smgrwrite(). It doesn't make much difference in
production builds. smgrextend() updates the relation size cache, so
you miss that, but that's harmless because we never use the cached
relation size of an init fork. But if you compile with
CHECK_WRITE_VS_EXTEND, you get an assertion failure.
Secondly, the smgrwrite() calls were performed before WAL-logging, so
the page image written to disk had 0/0 as the LSN, not the LSN of the
WAL record. That's also harmless in practice, but seems sloppy.
Thirdly, it's better to use the buffer cache, because then you don't
need to smgrimmedsync() the relation to disk, which adds latency.
Bypassing the cache makes sense for bulk operations like index
creation, but not when you're just initializing an empty index.
Creation of unlogged tables is hardly performance bottleneck in any
real world applications, but nevertheless.
Backpatch to v16, but no further. These issues should be harmless in
practice, so better to not rock the boat in older branches.
Reviewed-by: Robert Haas
Discussion: https://www.postgresql.org/message-id/6e5bbc08-cdfc-b2b3-9e23-1a914b9850a9@iki.fi
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The comment for the DSM_OP_CREATE paramater read "the a new handle"
which is confusing. Fix by rewording to indicate what the parameter
means for DSM_OP_CREATE.
Reported-by: Junwang Zhao <zhjwpku@gmail.com>
Discussion: https://postgr.es/m/CAEG8a3J2bc197ym-M_ykOXb9ox2eNn-QNKNeoSAoHYSw2NCOnw@mail.gmail.com
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The new_cluster parameter in check_for_new_tablespace_dir was
shadowing the globally defined new_cluster variable, causing
compiler warnings when running with -Wshadow. The function is
only applicable to the new cluster, so remove the parameter
rather than rename to match check_new_cluster_is_empty which
also only applies to the new cluster.
Author: Peter Smith <peter.b.smith@fujitsu.com>
Discussion: https://postgr.es/m/CAHut+PvS_PHLntWy1yTgXv0O1tWm4iVcKBQFzpoQRDsm2Ce_Fg@mail.gmail.com
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Remove some line breaks that have become unnecessary after some
variable renaming.
Discussion: https://www.postgresql.org/message-id/flat/5ed89c69-f4e6-5dab-4003-63bde7460e5e%40eisentraut.org
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Especially make sure that array arguments have plural names.
Discussion: https://www.postgresql.org/message-id/flat/5ed89c69-f4e6-5dab-4003-63bde7460e5e%40eisentraut.org
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in index.c and indexcmds.c and some adjacent places. This especially
makes it easier to understand for some complicated function signatures
which are the input and the output arguments.
Discussion: https://www.postgresql.org/message-id/flat/5ed89c69-f4e6-5dab-4003-63bde7460e5e%40eisentraut.org
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This commit introduces descriptively-named macros for the
identifiers used in wire protocol messages. These new macros are
placed in a new header file so that they can be easily used by
third-party code.
Author: Dave Cramer
Reviewed-by: Alvaro Herrera, Tatsuo Ishii, Peter Smith, Robert Haas, Tom Lane, Peter Eisentraut, Michael Paquier
Discussion: https://postgr.es/m/CADK3HHKbBmK-PKf1bPNFoMC%2BoBt%2BpD9PH8h5nvmBQskEHm-Ehw%40mail.gmail.com
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Commit 31966b15 invented a way for functions dealing with relation
extension to accept a Relation in online code and an SMgrRelation in
recovery code. It seems highly likely that future bufmgr.c interfaces
will face the same problem, and need to do something similar.
Generalize the names so that each interface doesn't have to re-invent
the wheel.
Back-patch to 16. Since extension AM authors might start using the
constructor macros once 16 ships, we agreed to do the rename in 16
rather than waiting for 17.
Reviewed-by: Peter Geoghegan <pg@bowt.ie>
Reviewed-by: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/CA%2BhUKG%2B6tLD2BhpRWycEoti6LVLyQq457UL4ticP5xd8LqHySA%40mail.gmail.com
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Commit 396d348b04 did not account for the default collation.
Also, use pg_log_warning() instead of Assert().
Discussion: https://postgr.es/m/ce071503fee88334aa70f360e6e4ea14d48305ee.camel%40j-davis.com
Reviewed-by: Michael Paquier
Backpatch-through: 15
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Attribute missing values might be needed past the lifetime of the tuple
descriptors from which they are extracted. To avoid possibly using
pointers for by-reference values which might thus be left dangling, we
cache a datumCopy'd version of the datum in the TopMemoryContext. Since
we first search for the value this only needs to be done once per
session for any such value.
Original complaint from Tom Lane, idea for mitigation by Andrew Dunstan,
tweaked by Tom Lane.
Backpatch to version 11 where missing values were introduced.
Discussion: https://postgr.es/m/1306569.1687978174@sss.pgh.pa.us
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Noticed while studying nearby code
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The current code uses if/else statements at various places to take worker
specific actions. Change those to use the switch on worker type added by
commit 2a8b40e368. This makes code easier to read and understand.
Author: Peter Smith
Reviewed-by: Amit Kapila, Hou Zhijie
Discussion: http://postgr.es/m/CAHut+PttPSuP0yoZ=9zLDXKqTJ=d0bhxwKaEaNcaym1XqcvDEg@mail.gmail.com
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This commit fixes the function of $subject for shared relations. This
feature has been added by e042678. Unfortunately, this new behavior got
removed by 5891c7a when moving statistics to shared memory.
Reported-by: Mitsuru Hinata
Author: Masahiro Ikeda
Reviewed-by: Kyotaro Horiguchi, Masahiko Sawada
Discussion: https://postgr.es/m/7cc69f863d9b1bc677544e3accd0e4b4@oss.nttdata.com
Backpatch-through: 15
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Missed in 1e68e43, because I cannot correctly merge a branch.
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