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Hashing function is useful for simulating real-world workload in test like
WEB workload, as an example - YCSB benchmarks.
Author: Ildar Musin with minor editorization by me
Reviewed by: Fabien Coelho, me
Discussion: https://www.postgresql.org/message-id/flat/0e8bd39e-dfcd-2879-f88f-272799ad7ef2@postgrespro.ru
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Patch by me.
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Logical decoding should not publish anything about tables created as
part of a heap rewrite during DDL. Those tables don't exist externally,
so consumers of logical decoding cannot do anything sensible with that
information. In ab28feae2bd3d4629bd73ae3548e671c57d785f0, we worked
around this for built-in logical replication, but that was hack.
This is a more proper fix: We mark such transient heaps using the new
field pg_class.relwrite, linking to the original relation OID. By
default, we ignore them in logical decoding before they get to the
output plugin. Optionally, a plugin can register their interest in
getting such changes, if they handle DDL specially, in which case the
new field will help them get information about the actual table.
Reviewed-by: Craig Ringer <craig@2ndquadrant.com>
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strict_word_similarity is similar to existing word_similarity function but
it takes into account word boundaries to compute similarity.
Author: Alexander Korotkov
Review by: David Steele, Liudmila Mantrova, me
Discussion: https://www.postgresql.org/message-id/flat/CY4PR17MB13207ED8310F847CF117EED0D85A0@CY4PR17MB1320.namprd17.prod.outlook.com
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word_similarity before claimed as returning similarity of closest word in
string, but, actually it returns similarity of substring. Also fix mistyped
comments.
Author: Alexander Korotkov
Review by: David Steele, Liudmila Mantrova
Discussionis:
https://www.postgresql.org/message-id/flat/CY4PR17MB13207ED8310F847CF117EED0D85A0@CY4PR17MB1320.namprd17.prod.outlook.com
https://www.postgresql.org/message-id/flat/f43b242d-000c-f4c8-cb8b-d37e9752cd93%40postgrespro.ru
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This is an optional dependency. It'll be used for the upcoming LLVM
based just in time compilation support, which needs to wrap a few LLVM
C++ APIs so they're accessible from C..
For now test for C++ compilers unconditionally, without failing if not
present, to ensure wide buildfarm coverage. If we're bothered by the
additional test times (which are quite short) or verbosity, we can
later make the tests conditional on --with-llvm.
Author: Andres Freund
Discussion: https://postgr.es/m/20170901064131.tazjxwus3k2w3ybh@alap3.anarazel.de
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Too much PG on the brain in commit 769159fd3, evidently.
Noted by marcelhuberfoo@gmail.com.
Discussion: https://postgr.es/m/152154834496.11957.17112112802418832865@wrigleys.postgresql.org
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If a view lacks an INSTEAD OF trigger, DML on it can only work by rewriting
the command into a command on the underlying base table(s). Then we will
fire triggers attached to those table(s), not those for the view. This
seems appropriate from a consistency standpoint, but nowhere was the
behavior explicitly documented, so let's do that.
There was some discussion of throwing an error or warning if a statement
trigger is created on a view without creating a row INSTEAD OF trigger.
But a simple implementation of that would result in dump/restore ordering
hazards. Given that it's been like this all along, and we hadn't heard
a complaint till now, a documentation improvement seems sufficient.
Per bug #15106 from Pu Qun. Back-patch to all supported branches.
Discussion: https://postgr.es/m/152083391168.1215.16892140713507052796@wrigleys.postgresql.org
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Since SSL compression is no longer recommended, turn the default in
libpq from on to off.
OpenSSL 1.1.0 and many distribution packages already turn compression
off by default, so such a server won't accept compression anyway. So
this will mainly affect users of older OpenSSL installations.
Also update the documentation to make clear that this setting is no
longer recommended.
Discussion: https://www.postgresql.org/message-id/flat/595cf3b1-4ffe-7f05-6f72-f72b7afa7993%402ndquadrant.com
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This allows specifying an external command for prompting for or
otherwise obtaining passphrases for SSL key files. This is useful
because in many cases there is no TTY easily available during service
startup.
Also add a setting ssl_passphrase_command_supports_reload, which allows
supporting SSL configuration reload even if SSL files need passphrases.
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
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This was not stated in so many words anywhere. Document it to make
clear that it's a design limitation and not just an oversight or
documentation omission.
Discussion: https://postgr.es/m/152089733343.1222.6927268289645380498@wrigleys.postgresql.org
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It is not used for anything internally, and it cannot be relied on for
external uses, so it can just be removed. To correct recommended way to
check for a primary key is in pg_index.
Discussion: https://www.postgresql.org/message-id/flat/b1a24c6c-6913-f89c-674e-0704f0ed69db@2ndquadrant.com
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In a top-level CALL, the values of INOUT arguments will be returned as a
result row. In PL/pgSQL, the values are assigned back to the input
arguments. In other languages, the same convention as for return a
record from a function is used. That does not require any code changes
in the PL implementations.
Reviewed-by: Pavel Stehule <pavel.stehule@gmail.com>
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Autovacuum's 'workitem' request queue is of limited size, so requests
can fail if they arrive more quickly than autovacuum can process them.
Emit a log message when this happens, to provide better visibility of
this.
Backpatch to 10. While this represents an API change for
AutoVacuumRequestWork, that function is not yet prepared to deal with
external modules calling it, so there doesn't seem to be any risk (other
than log spam, that is.)
Author: Masahiko Sawada
Reviewed-by: Fabrízio Mello, Ildar Musin, Álvaro Herrera
Discussion: https://postgr.es/m/CAD21AoB1HrQhp6_4rTyHN5kWEJCEsG8YzsjZNt-ctoXSn5Uisw@mail.gmail.com
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New wording from David G. Johnston, who noticed the unreadable original
also. Include his suggested test case as well.
Fix a typo I noticed elsewhere while doing this.
Discussion: https://postgr.es/m/CAKFQuwY4Ld7ecxL_KAmaxwt0FUu5VcPPN2L4dh+3BeYbrdBa5g@mail.gmail.com
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David Rowley
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Amit Langote
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We were independently checking ReservedBackends < MaxConnections and
max_wal_senders < MaxConnections, but because walsenders aren't allowed
to use superuser-reserved connections, that's really the wrong thing.
Correct behavior is to insist on ReservedBackends + max_wal_senders being
less than MaxConnections. Fix the code and associated documentation.
This has been wrong for a long time, but since the situation probably
hardly ever arises in the field (especially pre-v10, when the default
for max_wal_senders was zero), no back-patch.
Discussion: https://postgr.es/m/28271.1520195491@sss.pgh.pa.us
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The SSL documentation text has gotten a bit long, so add some
subsections and reorder for better flow.
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The previous method worked off the full virtual address space, not just
the shared memory usage.
Author: Tsunakawa, Takayuki <tsunakawa.takay@jp.fujitsu.com>
Reviewed-by: Justin Pryzby <pryzby@telsasoft.com>
Reviewed-by: Vasundhar Boddapati <bvasundhar@gmail.com>
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Author: Michael Paquier <michael@paquier.xyz>
Reported-by: Şahap Aşçı <sahapasci@gmail.com>
Reviewed-by: Vik Fearing <vik.fearing@2ndquadrant.com>
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Like the LDAP and SSL tests, these are not run by default but can be
selected via PG_TEST_EXTRA.
Reviewed-by: Thomas Munro <thomas.munro@enterprisedb.com>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
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This is analogous to the syntax allowed for VACUUM. This allows us to
avoid making new options reserved keywords and makes it easier to
allow arbitrary argument order. Oh, and it's consistent with the other
commands, too.
Author: Nathan Bossart
Reviewed-By: Michael Paquier, Masahiko Sawada
Discussion: https://postgr.es/m/D3FC73E2-9B1A-4DB4-8180-55F57D116B4E@amazon.com
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The LIKE INCLUDING ALL clause to CREATE TABLE intuitively indicates
cloning of extended statistics on the source table, but it failed to do
so. Patch it up so that it does. Also include an INCLUDING STATISTICS
option to the LIKE clause, so that the behavior can be requested
individually, or excluded individually.
While at it, reorder the INCLUDING options, both in code and in docs, in
alphabetical order which makes more sense than feature-implementation
order that was previously used.
Backpatch this to Postgres 10, where extended statistics were
introduced, because this is seen as an oversight in a fresh feature
which is better to get consistent from the get-go instead of changing
only in pg11.
In pg11, comments on statistics objects are cloned too. In pg10 they
are not, because I (Álvaro) was too coward to change the parse node as
required to support it. Also, in pg10 I chose not to renumber the
parser symbols for the various INCLUDING options in LIKE, for the same
reason. Any corresponding user-visible changes (docs) are backpatched,
though.
Reported-by: Stephen Froehlich
Author: David Rowley
Reviewed-by: Álvaro Herrera, Tomas Vondra
Discussion: https://postgr.es/m/CY1PR0601MB1927315B45667A1B679D0FD5E5EF0@CY1PR0601MB1927.namprd06.prod.outlook.com
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Replace "checkpoint segment" with "WAL segment".
Reported-by: Maksim Milyutin <milyutinma@gmail.com>
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In PostgreSQL 9.5, the documentation for pg_stat_replication was moved,
so some of the links pointed to an appropriate location.
Author: Maksim Milyutin <milyutinma@gmail.com>
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The SSL and LDAP test suites are not run by default, as they are not
secure for multi-user environments. This commit adds an extra make
variable to optionally enable them, for example:
make check-world PG_TEST_EXTRA='ldap ssl'
Author: Michael Paquier <michael@paquier.xyz>
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The new column distinguishes normal functions, procedures, aggregates,
and window functions. This replaces the existing columns proisagg and
proiswindow, and replaces the convention that procedures are indicated
by prorettype == 0. Also change prorettype to be VOIDOID for procedures.
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
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Author: Michael Paquier
Discussion: https://postgr.es/m/20180217140305.GB31338@paquier.xyz
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Commit 924bcf4f16d added WaitForBackgroundWorkerShutdown, but didn't
add it to the documentation. Fix that and two small spelling errors in
the WaitForBackgroundWorkerStartup paragraph.
Author: Daniel Gustafsson
Discussion: https://postgr.es/m/C8738949-0350-4999-A1DA-26E209FF248D@yesql.se
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Author: Ildar Musin
Reviewed-By: Fabian Coelho
Discussion: https://postgr.es/m/6376ed81-3ce8-14f4-4758-099872f4ce7d@postgrespro.ru
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Commit ff963b393 added two identical copies of this row.
Dagfinn Ilmari Mannsåker
Discussion: https://postgr.es/m/d8j8tdevb7x.fsf@dalvik.ping.uio.no
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Thomas Munro
Discussion: http://postgr.es/m/CAEepm=3g1hhbFzYkR_QT9RmBvsGX4UaeCtX-4Js8OOEMmFeaSQ@mail.gmail.com
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Turn off man.endnotes.are.numbered parameter, which we don't need, but
which increases performance vastly if off. Also turn on
man.output.quietly, which also makes things a bit faster, but which is
also less useful now as a progress indicator because the build is so
fast now.
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The changes in the CREATE POLICY man page from commit
87c2a17fee784c7e1004ba3d3c5d8147da676783 triggered a stylesheet bug that
created some warning messages and incorrect output. This installs a
workaround.
Also improve the whitespace a bit so it looks better.
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Michael Paquier
Discussion: http://postgr.es/m/20180209135327.GC29003@paquier.xyz
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Security: CVE-2018-1058
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The ability to create like-named objects in different schemas opens up
the potential for users to change the behavior of other users' queries,
maliciously or accidentally. When you connect to a PostgreSQL server,
you should remove from your search_path any schema for which a user
other than yourself or superusers holds the CREATE privilege. If you do
not, other users holding CREATE privilege can redefine the behavior of
your commands, causing them to perform arbitrary SQL statements under
your identity. "SET search_path = ..." and "SELECT
pg_catalog.set_config(...)" are not vulnerable to such hijacking, so one
can use either as the first command of a session. As special
exceptions, the following client applications behave as documented
regardless of search_path settings and schema privileges: clusterdb
createdb createlang createuser dropdb droplang dropuser ecpg (not
programs it generates) initdb oid2name pg_archivecleanup pg_basebackup
pg_config pg_controldata pg_ctl pg_dump pg_dumpall pg_isready
pg_receivewal pg_recvlogical pg_resetwal pg_restore pg_rewind pg_standby
pg_test_fsync pg_test_timing pg_upgrade pg_waldump reindexdb vacuumdb
vacuumlo. Not included are core client programs that run user-specified
SQL commands, namely psql and pgbench. PostgreSQL encourages non-core
client applications to do likewise.
Document this in the context of libpq connections, psql connections,
dblink connections, ECPG connections, extension packaging, and schema
usage patterns. The principal defense for applications is "SELECT
pg_catalog.set_config('search_path', '', false)", and the principal
defense for databases is "REVOKE CREATE ON SCHEMA public FROM PUBLIC".
Either one is sufficient to prevent attack. After a REVOKE, consider
auditing the public schema for objects named like pg_catalog objects.
Authors of SECURITY DEFINER functions use some of the same defenses, and
the CREATE FUNCTION reference page already covered them thoroughly.
This is a good opportunity to audit SECURITY DEFINER functions for
robust security practice.
Back-patch to 9.3 (all supported versions).
Reviewed by Michael Paquier and Jonathan S. Katz. Reported by Arseniy
Sharoglazov.
Security: CVE-2018-1058
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This is mostly cosmetic, but it might fix build failures, on some
platform, when copying from the documentation.
Back-patch to 9.3 (all supported versions).
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It seems some people are bothered by the outdated MD5 appearing in
example code. So replace it with more modern alternatives or by
a different example function.
Reported-by: Jon Wolski <jonwolski@gmail.com>
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Add the user-callable functions sha224, sha256, sha384, sha512. We
already had these in the C code to support SCRAM, but there was no test
coverage outside of the SCRAM tests. Adding these as user-callable
functions allows writing some tests. Also, we have a user-callable md5
function but no more modern alternative, which led to wide use of md5 as
a general-purpose hash function, which leads to occasional complaints
about using md5.
Also mark the existing md5 functions as leak-proof.
Reviewed-by: Michael Paquier <michael@paquier.xyz>
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Move the "additional restrictions" comment to ALTER TABLE ADD
CONSTRAINT instead of ADD CONSTRAINT USING INDEX; and in the latter
instead indicate that partitioned tables are unsupported
Noted by David G. Johnston
Discussion: https://postgr.es/m/CAKFQuwY4Ld7ecxL_KAmaxwt0FUu5VcPPN2L4dh+3BeYbrdBa5g@mail.gmail.com
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If we restrict unique constraints on partitioned tables so that they
must always include the partition key, then our standard approach to
unique indexes already works --- each unique key is forced to exist
within a single partition, so enforcing the unique restriction in each
index individually is enough to have it enforced globally. Therefore we
can implement unique indexes on partitions by simply removing a few
restrictions (and adding others.)
Discussion: https://postgr.es/m/20171222212921.hi6hg6pem2w2t36z@alvherre.pgsql
Discussion: https://postgr.es/m/20171229230607.3iib6b62fn3uaf47@alvherre.pgsql
Reviewed-by: Simon Riggs, Jesper Pedersen, Peter Eisentraut, Jaime
Casanova, Amit Langote
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Discussion: https://www.postgresql.org/message-id/flat/ad24e4f4-6481-066e-e3fb-6ef4a3121882%402ndquadrant.com
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One example in create_table.sgml claimed to be showing table constraint
syntax, but it was really column constraint syntax due to the omission
of a comma. This is both wrong and confusing, so fix it in all
supported branches.
Per report from neil@postgrescompare.com.
Discussion: https://postgr.es/m/151871659877.1393.2431103178451978795@wrigleys.postgresql.org
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