| Commit message (Collapse) | Author | Age |
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"\pset format csv", or --csv, selects comma-separated values table format.
This is compliant with RFC 4180, except that we aren't too picky about
whether the record separator is LF or CRLF; also, the user may choose a
field separator other than comma.
This output format is directly compatible with the server's COPY CSV
format, and will also be useful as input to other programs. It's
considerably safer for that purpose than the old recommendation to
use "unaligned" format, since the latter couldn't handle data
containing the field separator character.
Daniel Vérité, reviewed by Fabien Coelho and David Fetter, some
tweaking by me
Discussion: https://postgr.es/m/a8de371e-006f-4f92-ab72-2bbe3ee78f03@manitou-mail.org
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Maybe we'll implement them later, or maybe not, but let's make the statu
quo clear for now.
Author: Lætitia Avrot, Patrick Francelle
Reviewers: too many to list
Discussion: https://postgr.es/m/CAB_COdhUuzNFOJfc7SNNso5rOuVA3ui93KMVunEM8Yih+K5A6A@mail.gmail.com
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This reverts commit 058ef3a, per complains from Magnus Hagander and Vik
Fearing.
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Author: Nawaz Ahmed
Discussion: https://postgr.es/m/154319327168.1315.1846953598601966513@wrigleys.postgresql.org
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A set of failures in buildfarm machines are proving that this is not
quite ready yet because of another set of issues:
- MSVC scripts assume that REGRESS_OPTS can only use top_builddir. Some
test suites actually finish by using top_srcdir, like pg_stat_statements
which cause the regression tests to never run.
- Trying to enforce top_builddir does not work either when using VPATH
as this is not recognized properly.
- TAP tests of bloom are unstable on various platforms, causing various
failures.
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The following options are added for extensions:
- TAP_TESTS, to allow an extention to run TAP tests which are the ones
present in t/*.pl. A subset of tests can always be run with the
existing PROVE_TESTS for developers.
- ISOLATION, to define a list of isolation tests.
- ISOLATION_OPTS, to pass custom options to isolation_tester.
A couple of custom Makefile targets have been accumulated across the
tree to cover the lack of facility in PGXS for a couple of releases when
using those test suites, which are all now replaced with the new flags,
without reducing the test coverage. This also fixes an issue with
contrib/bloom/, which had a custom target to trigger its TAP tests of
its own not part of the main check runs.
Author: Michael Paquier
Reviewed-by: Adam Berlin, Álvaro Herrera, Tom Lane, Nikolay Shaplov,
Arthur Zakirov
Discussion: https://postgr.es/m/20180906014849.GG2726@paquier.xyz
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recovery.conf settings are now set in postgresql.conf (or other GUC
sources). Currently, all the affected settings are PGC_POSTMASTER;
this could be refined in the future case by case.
Recovery is now initiated by a file recovery.signal. Standby mode is
initiated by a file standby.signal. The standby_mode setting is
gone. If a recovery.conf file is found, an error is issued.
The trigger_file setting has been renamed to promote_trigger_file as
part of the move.
The documentation chapter "Recovery Configuration" has been integrated
into "Server Configuration".
pg_basebackup -R now appends settings to postgresql.auto.conf and
creates a standby.signal file.
Author: Fujii Masao <masao.fujii@gmail.com>
Author: Simon Riggs <simon@2ndquadrant.com>
Author: Abhijit Menon-Sen <ams@2ndquadrant.com>
Author: Sergei Kornilov <sk@zsrv.org>
Discussion: https://www.postgresql.org/message-id/flat/607741529606767@web3g.yandex.ru/
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The documentation of CREATE/ALTER ROLE has been missing two things
related to PASSWORD:
- The password value provided needs to be quoted, some places of the
documentation marked the field with quotes, but not others, which led to
confusion.
- PASSWORD NULL was not provided consistently, with ENCRYPTED being not
compatible with it.
Reported-by: Steven Winfield
Author: Michael Paquier
Reviewed-by: David G. Johnston
Discussion: https://postgr.es/m/154282901979.1316.7418475422120496802@wrigleys.postgresql.org
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Documenting INCLUDE in the section about unique indexes is confusing,
as complained of by Emilio Platzer. Furthermore, it entirely failed
to explain why you might want to use the feature. The section about
index-only scans is really the right place; it already talked about
making such things the hard way. Rewrite that text to describe INCLUDE
as the normal way to make a covering index.
Also, move that section up a couple of places, as it now seems more
important than some of the stuff we had before it. It still has to
be after expression and partial indexes, since otherwise some of it
would involve forward references.
Discussion: https://postgr.es/m/154031939560.30897.14677735588262722042@wrigleys.postgresql.org
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Removed one too many words. Fix for
7906de847f229f391b9e6b5892b4b4a89f29edb4.
Reported-by: Thomas Munro
Backpatch-through: 9.4
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Reported-by: Kevin <kcolagio@gmail.com>
Discussion: https://postgr.es/m/154082462281.30897.14043119084654378035@wrigleys.postgresql.org
Backpatch-through: 9.4
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Previously tables declared WITH OIDS, including a significant fraction
of the catalog tables, stored the oid column not as a normal column,
but as part of the tuple header.
This special column was not shown by default, which was somewhat odd,
as it's often (consider e.g. pg_class.oid) one of the more important
parts of a row. Neither pg_dump nor COPY included the contents of the
oid column by default.
The fact that the oid column was not an ordinary column necessitated a
significant amount of special case code to support oid columns. That
already was painful for the existing, but upcoming work aiming to make
table storage pluggable, would have required expanding and duplicating
that "specialness" significantly.
WITH OIDS has been deprecated since 2005 (commit ff02d0a05280e0).
Remove it.
Removing includes:
- CREATE TABLE and ALTER TABLE syntax for declaring the table to be
WITH OIDS has been removed (WITH (oids[ = true]) will error out)
- pg_dump does not support dumping tables declared WITH OIDS and will
issue a warning when dumping one (and ignore the oid column).
- restoring an pg_dump archive with pg_restore will warn when
restoring a table with oid contents (and ignore the oid column)
- COPY will refuse to load binary dump that includes oids.
- pg_upgrade will error out when encountering tables declared WITH
OIDS, they have to be altered to remove the oid column first.
- Functionality to access the oid of the last inserted row (like
plpgsql's RESULT_OID, spi's SPI_lastoid, ...) has been removed.
The syntax for declaring a table WITHOUT OIDS (or WITH (oids = false)
for CREATE TABLE) is still supported. While that requires a bit of
support code, it seems unnecessary to break applications / dumps that
do not use oids, and are explicit about not using them.
The biggest user of WITH OID columns was postgres' catalog. This
commit changes all 'magic' oid columns to be columns that are normally
declared and stored. To reduce unnecessary query breakage all the
newly added columns are still named 'oid', even if a table's column
naming scheme would indicate 'reloid' or such. This obviously
requires adapting a lot code, mostly replacing oid access via
HeapTupleGetOid() with access to the underlying Form_pg_*->oid column.
The bootstrap process now assigns oids for all oid columns in
genbki.pl that do not have an explicit value (starting at the largest
oid previously used), only oids assigned later by oids will be above
FirstBootstrapObjectId. As the oid column now is a normal column the
special bootstrap syntax for oids has been removed.
Oids are not automatically assigned during insertion anymore, all
backend code explicitly assigns oids with GetNewOidWithIndex(). For
the rare case that insertions into the catalog via SQL are called for
the new pg_nextoid() function can be used (which only works on catalog
tables).
The fact that oid columns on system tables are now normal columns
means that they will be included in the set of columns expanded
by * (i.e. SELECT * FROM pg_class will now include the table's oid,
previously it did not). It'd not technically be hard to hide oid
column by default, but that'd mean confusing behavior would either
have to be carried forward forever, or it'd cause breakage down the
line.
While it's not unlikely that further adjustments are needed, the
scope/invasiveness of the patch makes it worthwhile to get merge this
now. It's painful to maintain externally, too complicated to commit
after the code code freeze, and a dependency of a number of other
patches.
Catversion bump, for obvious reasons.
Author: Andres Freund, with contributions by John Naylor
Discussion: https://postgr.es/m/20180930034810.ywp2c7awz7opzcfr@alap3.anarazel.de
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For example:
ssl_min_protocol_version = 'TLSv1.1'
ssl_max_protocol_version = 'TLSv1.2'
Reviewed-by: Steve Singer <steve@ssinger.info>
Discussion: https://www.postgresql.org/message-id/flat/1822da87-b862-041a-9fc2-d0310c3da173@2ndquadrant.com
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The documentation claimed that an enum type requires "one or more"
labels, but since 1fd9883ff49, zero labels are also allowed.
Reported-by: Lukas Eder <lukas.eder@gmail.com>
Bug: #15356
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When hostaddr is given, the actual IP address that psql is connected to
can be totally unexpected for the given host. The more verbose output
we now generate makes things clearer. Since the "host" and "hostaddr"
parts of the conninfo could come from different sources (say, one of
them is in the service specification or a URI-style conninfo and the
other is not), this is not as silly as it may first appear. This is
also definitely useful if the hostname resolves to multiple addresses.
Author: Fabien Coelho
Reviewed-by: Pavel Stehule, Arthur Zakirov
Discussion: https://postgr.es/m/alpine.DEB.2.21.1810261532380.27686@lancre
https://postgr.es/m/alpine.DEB.2.21.1808201323020.13832@lancre
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This didn't actually work: COPY would fail to flush the right files, and
instead would try to flush a non-existing file, causing the whole
transaction to fail.
Cope by raising an error as soon as the command is sent instead, to
avoid a nasty later surprise. Of course, it would be much better to
make it work, but we don't have a patch for that yet, and we don't know
if we'll want to backpatch one when we do.
Reported-by: Tomas Vondra
Author: David Rowley
Reviewed-by: Amit Langote, Steve Singer, Tomas Vondra
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On some operating systems, it doesn't make sense to retry fsync(),
because dirty data cached by the kernel may have been dropped on
write-back failure. In that case the only remaining copy of the
data is in the WAL. A subsequent fsync() could appear to succeed,
but not have flushed the data. That means that a future checkpoint
could apparently complete successfully but have lost data.
Therefore, violently prevent any future checkpoint attempts by
panicking on the first fsync() failure. Note that we already
did the same for WAL data; this change extends that behavior to
non-temporary data files.
Provide a GUC data_sync_retry to control this new behavior, for
users of operating systems that don't eject dirty data, and possibly
forensic/testing uses. If it is set to on and the write-back error
was transient, a later checkpoint might genuinely succeed (on a
system that does not throw away buffers on failure); if the error is
permanent, later checkpoints will continue to fail. The GUC defaults
to off, meaning that we panic.
Back-patch to all supported releases.
There is still a narrow window for error-loss on some operating
systems: if the file is closed and later reopened and a write-back
error occurs in the intervening time, but the inode has the bad
luck to be evicted due to memory pressure before we reopen, we could
miss the error. A later patch will address that with a scheme
for keeping files with dirty data open at all times, but we judge
that to be too complicated to back-patch.
Author: Craig Ringer, with some adjustments by Thomas Munro
Reported-by: Craig Ringer
Reviewed-by: Robert Haas, Thomas Munro, Andres Freund
Discussion: https://postgr.es/m/20180427222842.in2e4mibx45zdth5%40alap3.anarazel.de
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This clarifies the behavior of how the "wait" flag works, which is
something that the previous version of the documentation failed to do.
Author: Ian Barwick
Discussion: https://postgr.es/m/cbd38450-2295-10a1-1f73-591a692ae0b0@2ndquadrant.com
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Commit 5373bc2a08 has added type for background workers but forgot to
update at one place in the documentation.
Reported-by: John Naylor
Author: John Naylor
Reviewed-by: Amit Kapila
Backpatch-through: 11
Discussion: https://postgr.es/m/CAJVSVGVmvgJ8Lq4WBxC3zV5wf0txdCqRSgkWVP+jaBF=HgWscA@mail.gmail.com
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This hasn't been correct since 9.3 added "latex-longtable".
I left the phraseology "Unique abbreviations are allowed" alone.
It's correct as far as it goes, and we are studiously refraining
from specifying exactly what happens if you give a non-unique
abbreviation. (The answer in the back branches is "you get a
backwards-compatible choice", and the answer in HEAD will shortly
be "you get an error", but there seems no need to mention such
details here.)
Daniel Vérité
Discussion: https://postgr.es/m/cb7e1caf-3ea6-450d-af28-f524903a030c@manitou-mail.org
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date_trunc(field, timestamptz, zone_name) performs truncation using
the named time zone as reference, rather than working in the session
time zone as is the default behavior. It's equivalent to
date_trunc(field, timestamptz at time zone zone_name) at time zone zone_name
but it's faster, easier to type, and arguably easier to understand.
Vik Fearing and Tom Lane
Discussion: https://postgr.es/m/6249ffc4-2b22-4c1b-4e7d-7af84fedd7c6@2ndquadrant.com
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Change lock level for renaming index (either ALTER INDEX or implicitly
via some other commands) from AccessExclusiveLock to
ShareUpdateExclusiveLock.
One reason we need a strong lock for relation renaming is that the
name change causes a rebuild of the relcache entry. Concurrent
sessions that have the relation open might not be able to handle the
relcache entry changing underneath them. Therefore, we need to lock
the relation in a way that no one can have the relation open
concurrently. But for indexes, the relcache handles reloads specially
in RelationReloadIndexInfo() in a way that keeps changes in the
relcache entry to a minimum. As long as no one keeps pointers to
rd_amcache and rd_options around across possible relcache flushes,
which is the case, this ought to be safe.
We also want to use a self-exclusive lock for correctness, so that
concurrent DDL doesn't overwrite the rename if they start updating
while still seeing the old version. Therefore, we use
ShareUpdateExclusiveLock, which is already used by other DDL commands
that want to operate in a concurrent manner.
The reason this is interesting at all is that renaming an index is a
typical part of a concurrent reindexing workflow (CREATE INDEX
CONCURRENTLY new + DROP INDEX CONCURRENTLY old + rename back). And
indeed a future built-in REINDEX CONCURRENTLY might rely on the ability
to do concurrent renames as well.
Reviewed-by: Andrey Klychkov <aaklychkov@mail.ru>
Reviewed-by: Fabrízio de Royes Mello <fabriziomello@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/1531767486.432607658@f357.i.mail.ru
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Reported-by: David G. Johnston <david.g.johnston@gmail.com>
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Author: Alexander Lakhin
Discussion: https://postgr.es/m/2f55f6d2-3fb0-d4f6-5c47-18da3a1117e0@gmail.com
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A note in ddl.sgml used to mention that run-time pruning was only
implemented for Append. When we got MergeAppend support, this was
updated to mention that MergeAppend is supported too. This is
slightly weird as it's not all that obvious what exactly isn't
supported when we mention:
<para>
Both of these behaviors are likely to be changed in a future release
of <productname>PostgreSQL</productname>.
</para>
This patch updates this to mention that ModifyTable is unsupported,
which makes the above fragment make sense again.
Author: David Rowley <david.rowley@2ndquadrant.com>
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Before this change the docs weren't adapted to the fact that
wal_segment_size is now measured in bytes, rather than multiples of
wal_block_size.
Author: David Steele
Discussion: https://postgr.es/m/68ea97d6-2ed9-f339-e57d-ab3a33caf3b1@pgmasters.net
Backpatch: 11-, like fc49e24fa69 itself.
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This commit fixes a set of issues with ON COMMIT actions when used on
partitioned tables and tables with inheritance children:
- Applying ON COMMIT DROP on a partitioned table with partitions or on a
table with inheritance children caused a failure at commit time, with
complains about the children being already dropped as all relations are
dropped one at the same time.
- Applying ON COMMIT DELETE on a partition relying on a partitioned
table which uses ON COMMIT DROP would cause the partition truncation to
fail as the parent is removed first.
The solution to the first problem is to handle the removal of all the
dependencies in one go instead of dropping relations one-by-one, based
on a suggestion from Álvaro Herrera. So instead all the relation OIDs
to remove are gathered and then processed in one round of multiple
deletions.
The solution to the second problem is to reorder the actions, with
truncation happening first and relation drop done after. Even if it
means that a partition could be first truncated, then immediately
dropped if its partitioned table is dropped, this has the merit to keep
the code simple as there is no need to do existence checks on the
relations to drop.
Contrary to a manual TRUNCATE on a partitioned table, ON COMMIT DELETE
does not cascade to its partitions. The ON COMMIT action defined on
each partition gets the priority.
Author: Michael Paquier
Reviewed-by: Amit Langote, Álvaro Herrera, Robert Haas
Discussion: https://postgr.es/m/68f17907-ec98-1192-f99f-8011400517f5@lab.ntt.co.jp
Backpatch-through: 10
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Previously it was possible to set client_min_messages to FATAL or PANIC,
which had the effect of suppressing transmission of regular ERROR messages
to the client. Perhaps that seemed like a useful option in the past, but
the trouble with it is that it breaks guarantees that are explicitly made
in our FE/BE protocol spec about how a query cycle can end. While libpq
and psql manage to cope with the omission, that's mostly because they
are not very bright; client libraries that have more semantic knowledge
are likely to get confused. Notably, pgODBC doesn't behave very sanely.
Let's fix this by getting rid of the ability to set client_min_messages
above ERROR.
In HEAD, just remove the FATAL and PANIC options from the set of allowed
enum values for client_min_messages. (This change also affects
trace_recovery_messages, but that's OK since these aren't useful values
for that variable either.)
In the back branches, there was concern that rejecting these values might
break applications that are explicitly setting things that way. I'm
pretty skeptical of that argument, but accommodate it by accepting these
values and then internally setting the variable to ERROR anyway.
In all branches, this allows a couple of tiny simplifications in the
logic in elog.c, so do that.
Also respond to the point that was made that client_min_messages has
exactly nothing to do with the server's logging behavior, and therefore
does not belong in the "When To Log" subsection of the documentation.
The "Statement Behavior" subsection is a better match, so move it there.
Jonah Harris and Tom Lane
Discussion: https://postgr.es/m/7809.1541521180@sss.pgh.pa.us
Discussion: https://postgr.es/m/15479-ef0f4cc2fd995ca2@postgresql.org
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Add another transfer mode --clone to pg_upgrade (besides the existing
--link and the default copy), using special file cloning calls. This
makes the file transfer faster and more space efficient, achieving
speed similar to --link mode without the associated drawbacks.
On Linux, file cloning is supported on Btrfs and XFS (if formatted with
reflink support). On macOS, file cloning is supported on APFS.
Reviewed-by: Michael Paquier <michael@paquier.xyz>
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Add entries for v11 changes that went in post-stamping, but before
the final wrap.
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The code added by commit c203d6cf8 causes a crash in at least one case,
where a potentially-optimizable expression index has a storage type
different from the input data type. A cursory code review turned up
numerous other problems that seem impractical to fix on short notice.
Andres argued for revert of that patch some time ago, and if additional
senior committers had been paying attention, that's likely what would
have happened, but we were not :-(
At this point we can't just revert, at least not in v11, because that would
mean an ABI break for code touching relcache entries. And we should not
remove the (also buggy) support for the recheck_on_update index reloption,
since it might already be used in some databases in the field. So this
patch just does the as-little-invasive-as-possible measure of disabling
the feature as though recheck_on_update were forced off for all indexes.
I also removed the related regression tests (which would otherwise fail)
and the user-facing documentation of the reloption.
We should undertake a more thorough code cleanup if the patch can't be
fixed, but not under the extreme time pressure of being already overdue
for 11.1 release.
Per report from Ondřej Bouda and subsequent private discussion among
pgsql-release.
Discussion: https://postgr.es/m/20181106185255.776mstcyehnc63ty@alvherre.pgsql
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This makes the addition of new formats easier, and documentation lookups
easier.
Author: Daniel Vérité
Reviewed-by: Fabien Coelho
Discussion: https://postgr.es/m/alpine.DEB.2.20.1803081004241.2916@lancre
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I removed the item about the pg_stat_statements change from
release-11.sgml, as part of a sweep to delete items already committed
in 11.0; but actually we'd best keep it to ensure that people who've
pg_upgraded their databases will take the requisite action. Also make
said action more visible by making it into its own para. Noted by
Jonathan Katz.
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Security: CVE-2018-16850
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exec_stmt_call() tried to extract information out of a CALL statement's
argument list without using expand_function_arguments(), apparently in
the hope of saving a few nanoseconds by not processing defaulted
arguments. It got that quite wrong though, leading to crashes with
named arguments, as well as failure to enforce writability of the
argument for a defaulted INOUT parameter. Fix and simplify the logic
by using expand_function_arguments() before examining the list.
Also, move the argument-examination to just after producing the CALL
command's plan, before invoking the called procedure. This ensures
that we'll track possible changes in the procedure's argument list
correctly, and avoids a hazard of the plan cache being flushed while
the procedure executes.
Also fix assorted falsehoods and omissions in associated documentation.
Per bug #15477 from Alexey Stepanov.
Patch by me, with some help from Pavel Stehule. Back-patch to v11.
Discussion: https://postgr.es/m/15477-86075b1d1d319e0a@postgresql.org
Discussion: https://postgr.es/m/CAFj8pRA6UsujpTs9Sdwmk-R6yQykPx46wgjj+YZ7zxm4onrDyw@mail.gmail.com
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Improve the documentation in the CREATE SUBSCRIPTION command a bit by
removing an extraneous word and spelling out 'information'.
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As usual, the release notes for other branches will be made by cutting
these down, but put them up for community review first. Note that a
fair percentage of the entries apply only to prior branches because
their issue was already fixed in 11.0.
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The solution arrived at in commit e74dd00f5 presumes that the compiler
has a suitable default -isysroot setting ... but further experience
shows that in many combinations of macOS version, XCode version, Xcode
command line tools version, and phase of the moon, Apple's compiler
will *not* supply a default -isysroot value.
We could potentially go back to the approach used in commit 68fc227dd,
but I don't have a lot of faith in the reliability or life expectancy of
that either. Let's just revert to the approach already shipped in 11.0,
namely specifying an -isysroot switch globally. As a partial response to
the concerns raised by Jakob Egger, adjust the contents of Makefile.global
to look like
CPPFLAGS = -isysroot $(PG_SYSROOT) ...
PG_SYSROOT = /path/to/sysroot
This allows overriding the sysroot path at build time in a relatively
painless way.
Add documentation to installation.sgml about how to use the PG_SYSROOT
option. I also took the opportunity to document how to work around
macOS's "System Integrity Protection" feature.
As before, back-patch to all supported versions.
Discussion: https://postgr.es/m/20840.1537850987@sss.pgh.pa.us
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Adjustment to commit 8610c973ddf1cbf0befc1369d2cf0d56c0efcd0a.
Reported-by: Tom Lane
Discussion: https://postgr.es/m/17406.1541168421@sss.pgh.pa.us
Backpatch-through: 9.3
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Clarify that effective_cache_size is both kernel buffers and shared
buffers.
Reported-by: nat@makarevitch.org
Discussion: https://postgr.es/m/153685164808.22334.15432535018443165207@wrigleys.postgresql.org
Backpatch-through: 9.3
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Author: Daniel Gustafsson <daniel@yesql.se>
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Previously the combination of "does not return" and "any row" caused
ambiguity.
Reported-by: KES <kes-kes@yandex.ru>
Discussion: https://postgr.es/m/153701242703.22334.1476830122267077397@wrigleys.postgresql.org
Reviewed-by: David G. Johnston
Backpatch-through: 9.3
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This has been deprecated and effectively unused for a long time.
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
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This has been deprecated and effectively unused for a long time.
Reviewed-by: Alvaro Herrera <alvherre@2ndquadrant.com>
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
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spgendscan neglected to pfree all the memory allocated by spgbeginscan.
It's possible to get away with that in most normal queries, since the
memory is allocated in the executor's per-query context which is about
to get deleted anyway; but it causes severe memory leakage during
creation or filling of large exclusion-constraint indexes.
Also, document that amendscan is supposed to free what ambeginscan
allocates. The docs' lack of clarity on that point probably caused this
bug to begin with. (There is discussion of changing that API spec going
forward, but I don't think it'd be appropriate for the back branches.)
Per report from Bruno Wolff. It's been like this since the beginning,
so back-patch to all active branches.
In HEAD, also fix an independent leak caused by commit 2a6368343
(allocating memory during spgrescan instead of spgbeginscan, which
might be all right if it got cleaned up, but it didn't). And do a bit
of code beautification on that commit, too.
Discussion: https://postgr.es/m/20181024012314.GA27428@wolff.to
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This new function is useful to display a full tree of partitions with a
partitioned table given in output, and avoids the need of any complex
WITH RECURSIVE query when looking at partition trees which are
deep multiple levels.
It returns a set of records, one for each partition, containing the
partition's name, its immediate parent's name, a boolean value telling
if the relation is a leaf in the tree and an integer telling its level
in the partition tree with given table considered as root, beginning at
zero for the root, and incrementing by one each time the scan goes one
level down.
Author: Amit Langote
Reviewed-by: Jesper Pedersen, Michael Paquier, Robert Haas
Discussion: https://postgr.es/m/8d00e51a-9a51-ad02-d53e-ba6bf50b2e52@lab.ntt.co.jp
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Author: Daniel Gustafsson <daniel@yesql.se>
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