PostgreSQL 9.4.21 commit log

Stamp 9.4.21.

commit   : 4bf9119adf599dccccb7b1ad073606d0f28617d6    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 11 Feb 2019 16:24:38 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 11 Feb 2019 16:24:38 -0500    

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M configure
M configure.in
M doc/bug.template
M src/include/pg_config.h.win32
M src/interfaces/libpq/libpq.rc.in
M src/port/win32ver.rc

Translation updates

commit   : 968ffb09f24f02e3001a4a9e27c561eb8adb5e4b    
  
author   : Peter Eisentraut <peter@eisentraut.org>    
date     : Mon, 11 Feb 2019 14:10:14 +0100    
  
committer: Peter Eisentraut <peter@eisentraut.org>    
date     : Mon, 11 Feb 2019 14:10:14 +0100    

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Source-Git-URL: https://git.postgresql.org/git/pgtranslation/messages.git  
Source-Git-Hash: db7a038785d2919e23e222be1ffa1866087fa803  

M src/backend/po/de.po
M src/backend/po/fr.po
M src/backend/po/id.po
M src/backend/po/ru.po
M src/bin/initdb/po/de.po
M src/bin/initdb/po/fr.po
M src/bin/initdb/po/ru.po
M src/bin/pg_dump/po/ru.po
M src/bin/psql/po/ru.po
M src/interfaces/ecpg/ecpglib/po/ru.po

Release notes for 11.2, 10.7, 9.6.12, 9.5.16, 9.4.21.

commit   : 8898cf3040364f9591112fbdc99d363ac00d9c0a    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sun, 10 Feb 2019 15:44:05 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sun, 10 Feb 2019 15:44:05 -0500    

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M doc/src/sgml/release-9.4.sgml

Repair unsafe/unportable snprintf usage in pg_restore.

commit   : ed46d0d322b54b618557b88948c72bc2711d7c1b    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sat, 9 Feb 2019 19:45:38 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sat, 9 Feb 2019 19:45:38 -0500    

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warn_or_exit_horribly() was blithely passing a potentially-NULL  
string pointer to a %s format specifier.  That works (at least  
to the extent of not crashing) on some platforms, but not all,  
and since we switched to our own snprintf.c it doesn't work  
for us anywhere.  
  
Of the three string fields being handled this way here, I think  
that only "owner" is supposed to be nullable ... but considering  
that this is error-reporting code, it has very little business  
assuming anything, so put in defenses for all three.  
  
Per a crash observed on buildfarm member crake and then  
reproduced here.  Because of the portability aspect,  
back-patch to all supported versions.  

M src/bin/pg_dump/pg_backup_archiver.c

Defend against null error message reported by libxml2.

commit   : 37f3a7751efb2c2c3128dbc9f2571a99fe5f6396    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 8 Feb 2019 13:30:42 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 8 Feb 2019 13:30:42 -0500    

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While this isn't really supposed to happen, it can occur in OOM  
situations and perhaps others.  Instead of crashing, substitute  
"(no message provided)".  
  
I didn't worry about localizing this text, since we aren't  
localizing anything else here; besides, if we're on the edge of  
OOM, it's unlikely gettext() would work.  
  
Report and fix by Sergio Conde Gómez in bug #15624.  
  
Discussion: https://postgr.es/m/15624-4dea54091a2864e6@postgresql.org  

M src/backend/utils/adt/xml.c

Doc: fix thinko in description of how to escape a backslash in bytea.

commit   : ccae096ba8e16b161be11369da6ca20c17348c0a    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 8 Feb 2019 12:49:36 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 8 Feb 2019 12:49:36 -0500    

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Also clean up some discussion that had been left in a very confused  
state thanks to half-hearted adjustments for the change to  
standard_conforming_strings being the default.  
  
Discussion: https://postgr.es/m/154954987367.1297.4358910045409218@wrigleys.postgresql.org  

M doc/src/sgml/datatype.sgml

Ensure that foreign scans with lateral refs are planned correctly.

commit   : 876fd37fc8126c4725c2aca709a6be34c2001258    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 7 Feb 2019 13:10:46 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 7 Feb 2019 13:10:46 -0500    

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As reported in bug #15613 from Srinivasan S A, file_fdw and postgres_fdw  
neglected to mark plain baserel foreign paths as parameterized when the  
relation has lateral_relids.  Other FDWs have surely copied this mistake,  
so rather than just patching those two modules, install a band-aid fix  
in create_foreignscan_path to rectify the mistake centrally.  
  
Although the band-aid is enough to fix the visible symptom, correct  
the calls in file_fdw and postgres_fdw anyway, so that they are valid  
examples for external FDWs.  
  
Also, since the band-aid isn't enough to make this work for parameterized  
foreign joins, throw an elog(ERROR) if such a case is passed to  
create_foreignscan_path.  This shouldn't pose much of a problem for  
existing external FDWs, since it's likely they aren't trying to make such  
paths anyway (though some of them may need a defense against joins with  
lateral_relids, similar to the one this patch installs into postgres_fdw).  
  
Add some assertions in relnode.c to catch future occurrences of the same  
error --- in particular, as backstop against core-code mistakes like the  
one fixed by commit bdd9a99aa.  
  
Discussion: https://postgr.es/m/15613-092be1be9576c728@postgresql.org  

M contrib/file_fdw/file_fdw.c
M contrib/postgres_fdw/expected/postgres_fdw.out
M contrib/postgres_fdw/postgres_fdw.c
M contrib/postgres_fdw/sql/postgres_fdw.sql
M src/backend/optimizer/util/pathnode.c
M src/backend/optimizer/util/relnode.c

Propagate lateral-reference information to indirect descendant relations.

commit   : b33d5e076eecb5664dc9aaf9dd7e1d792a7cc774    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 6 Feb 2019 12:44:59 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 6 Feb 2019 12:44:59 -0500    

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create_lateral_join_info() computes a bunch of information about lateral  
references between base relations, and then attempts to propagate those  
markings to appendrel children of the original base relations.  But the  
original coding neglected the possibility of indirect descendants  
(grandchildren etc).  During v11 development we noticed that this was  
wrong for partitioned-table cases, but failed to realize that it was just  
as wrong for any appendrel.  While the case can't arise for appendrels  
derived from traditional table inheritance (because we make a flat  
appendrel for that), nested appendrels can arise from nested UNION ALL  
subqueries.  Failure to mark the lower-level relations as having lateral  
references leads to confusion in add_paths_to_append_rel about whether  
unparameterized paths can be built.  It's not very clear whether that  
leads to any user-visible misbehavior; the lack of field reports suggests  
that it may cause nothing worse than minor cost misestimation.  Still,  
it's a bug, and it leads to failures of Asserts that I intend to add  
later.  
  
To fix, we need to propagate information from all appendrel parents,  
not just those that are RELOPT_BASERELs.  We can still do it in one  
pass, if we rely on the append_rel_list to be ordered with ancestor  
relationships before descendant ones; add assertions checking that.  
While fixing this, we can make a small performance improvement by  
traversing the append_rel_list just once instead of separately for  
each appendrel parent relation.  
  
Noted while investigating bug #15613, though this patch does not fix  
that (which is why I'm not committing the related Asserts yet).  
  
Discussion: https://postgr.es/m/3951.1549403812@sss.pgh.pa.us  

M src/backend/optimizer/plan/initsplan.c

Unify searchpath and do file logic in MSVC build scripts.

commit   : 13e95662c0628a82d41582de181eccba6e0b7c9f    
  
author   : Andrew Dunstan <andrew@dunslane.net>    
date     : Wed, 6 Feb 2019 07:32:35 -0500    
  
committer: Andrew Dunstan <andrew@dunslane.net>    
date     : Wed, 6 Feb 2019 07:32:35 -0500    

Click here for diff

Commit f83419b739 failed to notice that mkvcbuild.pl and build.pl use  
different searchpath and do-file logic, breaking the latter, so it is  
adjusted to use the same logic as mkvcbuild.pl.  

M src/tools/msvc/build.pl

Fix included file path for modern perl

commit   : 2689e8e3345628a2fe42e5bfcb45fdbbaff04fbc    
  
author   : Andrew Dunstan <andrew@dunslane.net>    
date     : Tue, 5 Feb 2019 18:57:12 -0500    
  
committer: Andrew Dunstan <andrew@dunslane.net>    
date     : Tue, 5 Feb 2019 18:57:12 -0500    

Click here for diff

Contrary to the comment on 772d4b76, only paths starting with "./" or  
"../" are considered relative to the current working directory by perl's  
"do" function. So this patch converts all the relevant cases to use "./"  
paths. This only affects MSVC.  
  
Backpatch to all live branches.  

M src/tools/msvc/Install.pm
M src/tools/msvc/build.pl
M src/tools/msvc/install.pl
M src/tools/msvc/mkvcbuild.pl
M src/tools/msvc/pgbison.pl
M src/tools/msvc/pgflex.pl
M src/tools/msvc/vcregress.pl

More fixed for modern perl on back branches

commit   : 7a3763318e06e5add2464008dfb41216653d983d    
  
author   : Andrew Dunstan <andrew@dunslane.net>    
date     : Tue, 5 Feb 2019 18:31:10 -0500    
  
committer: Andrew Dunstan <andrew@dunslane.net>    
date     : Tue, 5 Feb 2019 18:31:10 -0500    

Click here for diff

Use "do" instead of "require" for included files, as it doesn't look for  
them in the search path but relative to the current working directory.  
These changes have already been made to REL_10_STABLE and later, to  
satisfy the demands of perlcritic, but need backporting now to earlier  
branches.  

M src/tools/msvc/Install.pm
M src/tools/msvc/build.pl
M src/tools/msvc/builddoc.pl
M src/tools/msvc/install.pl
M src/tools/msvc/mkvcbuild.pl
M src/tools/msvc/pgbison.pl
M src/tools/msvc/pgflex.pl
M src/tools/msvc/vcregress.pl

Keep perl style checker happy

commit   : ed2c2d063bd110f299211611b72a5dbe07a4d7be    
  
author   : Andrew Dunstan <andrew@dunslane.net>    
date     : Tue, 5 Feb 2019 15:16:55 -0500    
  
committer: Andrew Dunstan <andrew@dunslane.net>    
date     : Tue, 5 Feb 2019 15:16:55 -0500    

Click here for diff

It doesn't like code before "use strict;".  

M src/backend/catalog/genbki.pl

Update time zone data files to tzdata release 2018i.

commit   : a683df4037c22220e41ed8a6da1a94d49a346874    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 5 Feb 2019 10:58:53 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 5 Feb 2019 10:58:53 -0500    

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DST law changes in Kazakhstan, Metlakatla, and São Tomé and Príncipe.  
Kazakhstan's Qyzylorda zone is split in two, creating a new zone  
Asia/Qostanay, as some areas did not change UTC offset.  
Historical corrections for Hong Kong and numerous Pacific islands.  

M src/timezone/data/tzdata.zi

Fix searchpath for modern Perl for genbki.pl

commit   : 51884fa16a179852ec851172a72588d8e84ec05e    
  
author   : Andrew Dunstan <andrew@dunslane.net>    
date     : Tue, 5 Feb 2019 09:59:46 -0500    
  
committer: Andrew Dunstan <andrew@dunslane.net>    
date     : Tue, 5 Feb 2019 09:59:46 -0500    

Click here for diff

This was fixed for MSVC tools by commit 1df92eeafefac4, but per  
buildfarm member bowerbird genbki.pl needs the same treatment.  
  
Backpatch to all live branches.  

M src/backend/catalog/genbki.pl

Doc: in each release branch, keep only that branch’s own release notes.

commit   : bb428cb11722f799898af44c51fc649e47cb0cdd    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 4 Feb 2019 19:18:50 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 4 Feb 2019 19:18:50 -0500    

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Historically we've had each release branch include all prior branches'  
notes, including minor-release changes, back to the beginning of the  
project.  That's basically an O(N^2) proposition, and it was starting to  
catch up with us: as of HEAD the back-branch release notes alone accounted  
for nearly 30% of the documentation.  While there's certainly some value  
in easy access to back-branch notes, this is getting out of hand.  
  
Hence, switch over to the rule that each branch contains only its own  
release notes.  So as to not make older notes too hard to find, each  
branch will provide URLs for the immediately preceding branches'  
release notes on the project website.  
  
There might be value in providing aggregated notes across all branches  
somewhere on the website, but that's a task for another day.  
  
Discussion: https://postgr.es/m/cbd4aeb5-2d9c-8b84-e968-9e09393d4c83@postgresql.org  

M doc/src/sgml/filelist.sgml
D doc/src/sgml/release-7.4.sgml
D doc/src/sgml/release-8.0.sgml
D doc/src/sgml/release-8.1.sgml
D doc/src/sgml/release-8.2.sgml
D doc/src/sgml/release-8.3.sgml
D doc/src/sgml/release-8.4.sgml
D doc/src/sgml/release-9.0.sgml
D doc/src/sgml/release-9.1.sgml
D doc/src/sgml/release-9.2.sgml
D doc/src/sgml/release-9.3.sgml
D doc/src/sgml/release-old.sgml
M doc/src/sgml/release.sgml

Fix dumping of matviews with indirect dependencies on primary keys.

commit   : 2f93b74bf362e14c517820a5af30cfe64b2c4d1e    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 4 Feb 2019 17:20:02 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 4 Feb 2019 17:20:02 -0500    

Click here for diff

Commit 62215de29 turns out to have been not quite on-the-mark.  
When we are forced to postpone dumping of a materialized view into  
the dump's post-data section (because it depends on a unique index  
that isn't created till that section), we may also have to postpone  
dumping other matviews that depend on said matview.  The previous fix  
didn't reliably work for such cases: it'd break the dependency loops  
properly, producing a workable object ordering, but it didn't  
necessarily mark all the matviews as "postponed_def".  This led to  
harmless bleating about "archive items not in correct section order",  
as reported by Tom Cassidy in bug #15602.  Less harmlessly,  
selective-restore options such as --section might misbehave due to  
the matview dump objects not being properly labeled.  
  
The right way to fix it is to consider that each pre-data dependency  
we break amounts to moving the no-longer-dependent object into  
post-data, and hence we should mark that object if it's a matview.  
  
Back-patch to all supported versions, since the issue's been there  
since matviews were introduced.  
  
Discussion: https://postgr.es/m/15602-e895445f73dc450b@postgresql.org  

M src/bin/pg_dump/pg_dump_sort.c

Add PG_CFLAGS, PG_CXXFLAGS, and PG_LDFLAGS variables to PGXS

commit   : 42b204db298c201151fd5f8273a82d02dccb0335    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Sun, 3 Feb 2019 17:49:04 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Sun, 3 Feb 2019 17:49:04 +0900    

Click here for diff

Add PG_CFLAGS, PG_CXXFLAGS, and PG_LDFLAGS variables to pgxs.mk which  
will be appended or prepended to the corresponding make variables.  
Notably, there was previously no way to pass custom CXXFLAGS to third  
party extension module builds, COPT and PROFILE supporting only CFLAGS  
and LDFLAGS.  
  
Backpatch all the way down to ease integration with existing  
extensions.  
  
Author: Christoph Berg  
Reviewed-by: Andres Freund, Tom Lane, Michael Paquier  
Discussion: https://postgr.es/m/20181113104005.GA32154@msg.credativ.de  
Backpatch-through: 9.4  

M doc/src/sgml/extend.sgml
M src/makefiles/pgxs.mk

Avoid possible deadlock while locking multiple heap pages.

commit   : fba0a8292997c84f1642c8a8c601a24ffe1ed1f7    
  
author   : Amit Kapila <akapila@postgresql.org>    
date     : Sat, 2 Feb 2019 15:43:58 +0530    
  
committer: Amit Kapila <akapila@postgresql.org>    
date     : Sat, 2 Feb 2019 15:43:58 +0530    

Click here for diff

To avoid deadlock, backend acquires a lock on heap pages in block  
number order.  In certain cases, lock on heap pages is dropped and  
reacquired.  In this case, the locks are dropped for reading in  
corresponding VM page/s. The issue is we re-acquire locks in bufferId  
order whereas the intention was to acquire in blockid order.  
  
This commit ensures that we will always acquire locks on heap pages in  
blockid order.  
  
Reported-by: Nishant Fnu  
Author: Nishant Fnu  
Reviewed-by: Amit Kapila and Robert Haas  
Backpatch-through: 9.4  
Discussion: https://postgr.es/m/5883C831-2ED1-47C8-BFAC-2D5BAE5A8CAE@amazon.com  

M src/backend/access/heap/hio.c

Fix use of dangling pointer in heap_delete() when logging replica identity

commit   : 05d24cf7ca7aae4f6842dfbd0962a9d04511ba78    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Fri, 1 Feb 2019 10:36:02 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Fri, 1 Feb 2019 10:36:02 +0900    

Click here for diff

When logging the replica identity of a deleted tuple, XLOG_HEAP_DELETE  
records include references of the old tuple.  Its data is stored in an  
intermediate variable used to register this information for the WAL  
record, but this variable gets away from the stack when the record gets  
actually inserted.  
  
Spotted by clang's AddressSanitizer.  
  
Author: Stas Kelvish  
Discussion: https://postgr.es/m/085C8825-AD86-4E93-AF80-E26CDF03D1EA@postgrespro.ru  
Backpatch-through: 9.4  

M src/backend/access/heap/heapam.c

Fix a crash in logical replication

commit   : 452253eae95a3dd36b52606c91844af5f647d7fa    
  
author   : Peter Eisentraut <peter@eisentraut.org>    
date     : Mon, 28 Jan 2019 22:09:33 +0100    
  
committer: Peter Eisentraut <peter@eisentraut.org>    
date     : Mon, 28 Jan 2019 22:09:33 +0100    

Click here for diff

The bug was that determining which columns are part of the replica  
identity index using RelationGetIndexAttrBitmap() would run  
eval_const_expressions() on index expressions and predicates across  
all indexes of the table, which in turn might require a snapshot, but  
there wasn't one set, so it crashes.  There were actually two separate  
bugs, one on the publisher and one on the subscriber.  
  
To trigger the bug, a table that is part of a publication or  
subscription needs to have an index with a predicate or expression  
that lends itself to constant expressions simplification.  
  
The fix is to avoid the constant expressions simplification in  
RelationGetIndexAttrBitmap(), so that it becomes safe to call in these  
contexts.  The constant expressions simplification comes from the  
calls to RelationGetIndexExpressions()/RelationGetIndexPredicate() via  
BuildIndexInfo().  But RelationGetIndexAttrBitmap() calling  
BuildIndexInfo() is overkill.  The latter just takes pg_index catalog  
information, packs it into the IndexInfo structure, which former then  
just unpacks again and throws away.  We can just do this directly with  
less overhead and skip the troublesome calls to  
eval_const_expressions().  This also removes the awkward  
cross-dependency between relcache.c and index.c.  
  
Bug: #15114  
Reported-by: Петър Славов <pet.slavov@gmail.com>  
Reviewed-by: Noah Misch <noah@leadboat.com>  
Reviewed-by: Michael Paquier <michael@paquier.xyz>  
Discussion: https://www.postgresql.org/message-id/flat/152110589574.1223.17983600132321618383@wrigleys.postgresql.org/  

M src/backend/utils/cache/relcache.c

Allow UNLISTEN in hot-standby mode.

commit   : 549d2a238a7062c3f0647f96fc00d21c6c103ce1    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 25 Jan 2019 21:14:31 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 25 Jan 2019 21:14:31 -0500    

Click here for diff

Since LISTEN is (still) disallowed, UNLISTEN must be a no-op in a  
hot-standby session, and so there's no harm in allowing it.  This  
change allows client code to not worry about whether it's connected  
to a primary or standby server when performing session-state-reset  
type activities.  (Note that DISCARD ALL, which includes UNLISTEN,  
was already allowed, making it inconsistent to reject UNLISTEN.)  
  
Per discussion, back-patch to all supported versions.  
  
Shay Rojansky, reviewed by Mi Tar  
  
Discussion: https://postgr.es/m/CADT4RqCf2gA_TJtPAjnGzkC3ZiexfBZiLmA-mV66e4UyuVv8bA@mail.gmail.com  

M doc/src/sgml/high-availability.sgml
M src/backend/tcop/utility.c
M src/test/regress/expected/hs_standby_allowed.out
M src/test/regress/expected/hs_standby_disallowed.out
M src/test/regress/sql/hs_standby_allowed.sql
M src/test/regress/sql/hs_standby_disallowed.sql

Remove infinite-loop hazards in ecpg test suite.

commit   : 6d6333745b11530e46037fb5e2bbf357c0973dbd    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 24 Jan 2019 16:46:56 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 24 Jan 2019 16:46:56 -0500    

Click here for diff

A report from Andrew Dunstan showed that an ecpglib breakage that  
causes repeated query failures could lead to infinite loops in some  
ecpg test scripts, because they contain "while(1)" loops with no  
exit condition other than successful test completion.  That might  
be all right for manual testing, but it seems entirely unacceptable  
for automated test environments such as our buildfarm.  We don't  
want buildfarm owners to have to intervene manually when a test  
goes wrong.  
  
To fix, just change all those while(1) loops to exit after at most  
100 iterations (which is more than any of them expect to iterate).  
This seems sufficient since we'd see discrepancies in the test output  
if any loop executed the wrong number of times.  
  
I tested this by dint of intentionally breaking ecpg_do_prologue  
to always fail, and verifying that the tests still got to completion.  
  
Back-patch to all supported branches, since the whole point of this  
exercise is to protect the buildfarm against future mistakes.  
  
Discussion: https://postgr.es/m/18693.1548302004@sss.pgh.pa.us  

M src/interfaces/ecpg/test/compat_informix/test_informix.pgc
M src/interfaces/ecpg/test/expected/compat_informix-test_informix.c
M src/interfaces/ecpg/test/expected/pgtypeslib-nan_test.c
M src/interfaces/ecpg/test/expected/preproc-autoprep.c
M src/interfaces/ecpg/test/expected/preproc-outofscope.c
M src/interfaces/ecpg/test/expected/preproc-variable.c
M src/interfaces/ecpg/test/expected/sql-fetch.c
M src/interfaces/ecpg/test/expected/sql-quote.c
M src/interfaces/ecpg/test/pgtypeslib/nan_test.pgc
M src/interfaces/ecpg/test/preproc/autoprep.pgc
M src/interfaces/ecpg/test/preproc/outofscope.pgc
M src/interfaces/ecpg/test/preproc/variable.pgc
M src/interfaces/ecpg/test/sql/fetch.pgc
M src/interfaces/ecpg/test/sql/quote.pgc

Blind attempt to fix _configthreadlocale() failures on MinGW.

commit   : 773f594408b9abbddba558303678de6437f50c64    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 23 Jan 2019 22:46:45 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 23 Jan 2019 22:46:45 -0500    

Click here for diff

Apparently, some builds of MinGW contain a version of  
_configthreadlocale() that always returns -1, indicating failure.  
Rather than treating that as a curl-up-and-die condition, soldier on  
as though the function didn't exist.  This leaves us without thread  
safety on such MinGW versions, but we didn't have it anyway.  
  
Discussion: https://postgr.es/m/d06a16bc-52d6-9f0d-2379-21242d7dbe81@2ndQuadrant.com  

M src/interfaces/ecpg/ecpglib/descriptor.c
M src/interfaces/ecpg/ecpglib/execute.c

Fix misc typos in comments.

commit   : e46a475718680db3afa7fd343a2a75ae3e5d0d8e    
  
author   : Heikki Linnakangas <heikki.linnakangas@iki.fi>    
date     : Wed, 23 Jan 2019 13:39:00 +0200    
  
committer: Heikki Linnakangas <heikki.linnakangas@iki.fi>    
date     : Wed, 23 Jan 2019 13:39:00 +0200    

Click here for diff

Spotted mostly by Fabien Coelho.  
  
Discussion: https://www.postgresql.org/message-id/alpine.DEB.2.21.1901230947050.16643@lancre  

M contrib/pgcrypto/pgp-decrypt.c
M src/include/port.h
M src/pl/plpython/plpy_elog.c

Avoid thread-safety problem in ecpglib.

commit   : c9ff6cbfc472bb2a0db79c141d6da0a51825b066    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 21 Jan 2019 23:18:58 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 21 Jan 2019 23:18:58 -0500    

Click here for diff

ecpglib attempts to force the LC_NUMERIC locale to "C" while reading  
server output, to avoid problems with strtod() and related functions.  
Historically it's just issued setlocale() calls to do that, but that  
has major problems if we're in a threaded application.  setlocale()  
itself is not required by POSIX to be thread-safe (and indeed is not,  
on recent OpenBSD).  Moreover, its effects are process-wide, so that  
we could cause unexpected results in other threads, or another thread  
could change our setting.  
  
On platforms having uselocale(), which is required by POSIX:2008,  
we can avoid these problems by using uselocale() instead.  Windows  
goes its own way as usual, but we can make it safe by using  
_configthreadlocale().  Platforms having neither continue to use the  
old code, but that should be pretty much nobody among current systems.  
  
(Subsequent buildfarm results show that recent NetBSD versions still  
lack uselocale(), but it's not a big problem because they also do not  
support non-"C" settings for LC_NUMERIC.)  
  
Back-patch of commits 8eb4a9312 and ee27584c4.  
  
Michael Meskes and Tom Lane; thanks also to Takayuki Tsunakawa.  
  
Discussion: https://postgr.es/m/31420.1547783697@sss.pgh.pa.us  

M configure
M configure.in
M src/include/pg_config.h.in
M src/include/pg_config.h.win32
M src/interfaces/ecpg/ecpglib/descriptor.c
M src/interfaces/ecpg/ecpglib/execute.c
M src/interfaces/ecpg/ecpglib/extern.h

Revert “Add valgrind suppressions for wcsrtombs optimizations”

commit   : 6f090c1d8d226d214edd8958d0df561513b0547f    
  
author   : Tomas Vondra <tomas.vondra@postgresql.org>    
date     : Sat, 19 Jan 2019 20:36:07 +0100    
  
committer: Tomas Vondra <tomas.vondra@postgresql.org>    
date     : Sat, 19 Jan 2019 20:36:07 +0100    

Click here for diff

This reverts commit 41344896364c4bf2229ec590c95cf23a6bec928e.  
  
Per discussion, it's not desirable to add valgrind suppressions for  
outside our own code base (e.g. glibc in this case), especially when  
the suppressions may be platform-specific. There are better ways to  
deal with that, e.g. by providing local suppressions.  
  
Discussion: https://www.postgresql.org/message-id/flat/90ac0452-e907-e7a4-b3c8-15bd33780e62%402ndquadrant.com  

M src/tools/valgrind.supp

Use our own getopt() on OpenBSD.

commit   : b161ffe3175996d08d88d7e7d990959212dc81a1    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 18 Jan 2019 15:06:26 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 18 Jan 2019 15:06:26 -0500    

Click here for diff

Recent OpenBSD (at least 5.9 and up) has a version of getopt(3)  
that will not cope with the "-:" spec we use to accept double-dash  
options in postgres.c and postmaster.c.  Admittedly, that's a hack  
because POSIX only requires getopt() to allow alphanumeric option  
characters.  I have no desire to find another way, however, so  
let's just do what we were already doing on Solaris: force use  
of our own src/port/getopt.c implementation.  
  
In passing, improve some of the comments around said implementation.  
  
Per buildfarm and local testing.  Back-patch to all supported branches.  
  
Discussion: https://postgr.es/m/30197.1547835700@sss.pgh.pa.us  

M configure
M configure.in
M src/include/pg_getopt.h
M src/port/getopt.c

Replace references to mailinglists with @lists.postgresql.org

commit   : 1c57acc6558287a4ac75b9280d90ad1f13273289    
  
author   : Magnus Hagander <magnus@hagander.net>    
date     : Thu, 17 Jan 2019 13:52:51 +0100    
  
committer: Magnus Hagander <magnus@hagander.net>    
date     : Thu, 17 Jan 2019 13:52:51 +0100    

Click here for diff

The namespace for all lists have changed a while ago, so all references  
should use the correct address.  

M doc/src/sgml/installation.sgml
M doc/src/sgml/problems.sgml
M doc/src/sgml/stylesheet-hh.xsl
M doc/src/sgml/xml2.sgml

Remove references to Majordomo

commit   : a3f632aad92a089befe69be18d4ca35e32e9c55b    
  
author   : Magnus Hagander <magnus@hagander.net>    
date     : Thu, 17 Jan 2019 13:47:24 +0100    
  
committer: Magnus Hagander <magnus@hagander.net>    
date     : Thu, 17 Jan 2019 13:47:24 +0100    

Click here for diff

Lists are not handled by Majordomo anymore and haven't been for  
a while, so remove the reference and instead direct people to the  
list server.  

M doc/src/sgml/problems.sgml

Postpone aggregate checks until after collation is assigned.

commit   : 174fab993414dc80c594219aac7ba35669780b84    
  
author   : Andrew Gierth <rhodiumtoad@postgresql.org>    
date     : Thu, 17 Jan 2019 05:33:01 +0000    
  
committer: Andrew Gierth <rhodiumtoad@postgresql.org>    
date     : Thu, 17 Jan 2019 05:33:01 +0000    

Click here for diff

Previously, parseCheckAggregates was run before  
assign_query_collations, but this causes problems if any expression  
has already had a collation assigned by some transform function (e.g.  
transformCaseExpr) before parseCheckAggregates runs. The differing  
collations would cause expressions not to be recognized as equal to  
the ones in the GROUP BY clause, leading to spurious errors about  
unaggregated column references.  
  
The result was that CASE expr WHEN val ... would fail when "expr"  
contained a GROUPING() expression or matched one of the group by  
expressions, and where collatable types were involved; whereas the  
supposedly identical CASE WHEN expr = val ... would succeed.  
  
Backpatch all the way; this appears to have been wrong ever since  
collations were introduced.  
  
Per report from Guillaume Lelarge, analysis and patch by me.  
  
Discussion: https://postgr.es/m/CAECtzeVSO_US8C2Khgfv54ZMUOBR4sWq+6_bLrETnWExHT=rFg@mail.gmail.com  
Discussion: https://postgr.es/m/87muo0k0c7.fsf@news-spur.riddles.org.uk  

M src/backend/parser/analyze.c
M src/test/regress/expected/aggregates.out
M src/test/regress/sql/aggregates.sql

fix typo

commit   : feea3858f0a64646ec160475a890808c072970f5    
  
author   : Andrew Dunstan <andrew@dunslane.net>    
date     : Sun, 13 Jan 2019 16:43:14 -0500    
  
committer: Andrew Dunstan <andrew@dunslane.net>    
date     : Sun, 13 Jan 2019 16:43:14 -0500    

Click here for diff

M src/Makefile.global.in

Make DLSUFFIX easily discoverable by build scripts

commit   : 4ef6a2c78b5e14f124edd4a5e79ef7bd7798e490    
  
author   : Andrew Dunstan <andrew@dunslane.net>    
date     : Sun, 13 Jan 2019 15:59:35 -0500    
  
committer: Andrew Dunstan <andrew@dunslane.net>    
date     : Sun, 13 Jan 2019 15:59:35 -0500    

Click here for diff

This will enable things like the buildfarm client to discover more  
reliably if certain libraries have been installed.  
  
Discussion: https://postgr.es/m/859e7c91-7ef4-d4b4-2ca2-8046e0cbee09@2ndQuadrant.com  
  
Backpatch to all live branches.  

M src/Makefile.global.in

Doc: update our docs about kernel IPC parameters on *BSD.

commit   : 8fd909436a44f5a3dd20c0c0d5bc0b5cbadd186e    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 8 Jan 2019 12:03:54 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 8 Jan 2019 12:03:54 -0500    

Click here for diff

runtime.sgml said that you couldn't change SysV IPC parameters on OpenBSD  
except by rebuilding the kernel.  That's definitely wrong in OpenBSD 6.x,  
and excavation in their man pages says it changed in OpenBSD 3.3.  
  
Update NetBSD and OpenBSD sections to recommend adjustment of the SEMMNI  
and SEMMNS settings, which are painfully small by default on those  
platforms.  (The discussion thread contemplated recommending that  
people select POSIX semaphores instead, but the performance consequences  
of that aren't really clear, so I'll refrain.)  
  
Remove pointless discussion of SEMMNU and SEMMAP from the FreeBSD  
section.  Minor other wordsmithing.  
  
Discussion: https://postgr.es/m/27582.1546928073@sss.pgh.pa.us  

M doc/src/sgml/runtime.sgml

doc: document that INFO messages always go to client.

commit   : eef6476b2e21d0a127084240d25507d46e75b5eb    
  
author   : Andrew Gierth <rhodiumtoad@postgresql.org>    
date     : Mon, 7 Jan 2019 18:19:46 +0000    
  
committer: Andrew Gierth <rhodiumtoad@postgresql.org>    
date     : Mon, 7 Jan 2019 18:19:46 +0000    

Click here for diff

In passing add a couple of links to the message severity table.  
  
Backpatch because it's always been this way.  
  
Author: Karl O. Pinc <kop@meme.com>  

M doc/src/sgml/config.sgml

doc: Update RFC URLs

commit   : 1d9dfc77beb6b71789fedbf8c0a049c0ba6b4dae    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Sat, 5 Jan 2019 12:49:58 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Sat, 5 Jan 2019 12:49:58 +0900    

Click here for diff

Consistently use the IETF HTML links instead of a random mix of  
different sites and formats.  This also fixes one broken link for JSON  
documentation.  

M doc/src/sgml/json.sgml
M doc/src/sgml/libpq.sgml
M doc/src/sgml/pgcrypto.sgml

Improve ANALYZE’s handling of concurrent-update scenarios.

commit   : 3010de813f17abb493659436aafe8792a42272e3    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 3 Jan 2019 17:00:08 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 3 Jan 2019 17:00:08 -0500    

Click here for diff

This patch changes the rule for whether or not a tuple seen by ANALYZE  
should be included in its sample.  
  
When we last touched this logic, in commit 51e1445f1, we weren't  
thinking very hard about tuples being UPDATEd by a long-running  
concurrent transaction.  In such a case, we might see the pre-image as  
either LIVE or DELETE_IN_PROGRESS depending on timing; and we might see  
the post-image not at all, or as INSERT_IN_PROGRESS.  Since the existing  
code will not sample either DELETE_IN_PROGRESS or INSERT_IN_PROGRESS  
tuples, this leads to concurrently-updated rows being omitted from the  
sample entirely.  That's not very helpful, and it's especially the wrong  
thing if the concurrent transaction ends up rolling back.  
  
The right thing seems to be to sample DELETE_IN_PROGRESS rows just as if  
they were live.  This makes the "sample it" and "count it" decisions the  
same, which seems good for consistency.  It's clearly the right thing  
if the concurrent transaction ends up rolling back; in effect, we are  
sampling as though IN_PROGRESS transactions haven't happened yet.  
Also, this combination of choices ensures maximum robustness against  
the different combinations of whether and in which state we might see the  
pre- and post-images of an update.  
  
It's slightly annoying that we end up recording immediately-out-of-date  
stats in the case where the transaction does commit, but on the other  
hand the stats are fine for columns that didn't change in the update.  
And the alternative of sampling INSERT_IN_PROGRESS rows instead seems  
like a bad idea, because then the sampling would be inconsistent with  
the way rows are counted for the stats report.  
  
Per report from Mark Chambers; thanks to Jeff Janes for diagnosing  
what was happening.  Back-patch to all supported versions.  
  
Discussion: https://postgr.es/m/CAFh58O_Myr6G3tcH3gcGrF-=OExB08PJdWZcSBcEcovaiPsrHA@mail.gmail.com  

M src/backend/commands/analyze.c

Don’t believe MinMaxExpr is leakproof without checking.

commit   : d6b37cdb6ec903545df78994806a8d9526e74fb0    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 2 Jan 2019 16:33:48 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 2 Jan 2019 16:33:48 -0500    

Click here for diff

MinMaxExpr invokes the btree comparison function for its input datatype,  
so it's only leakproof if that function is.  Many such functions are  
indeed leakproof, but others are not, and we should not just assume that  
they are.  Hence, adjust contain_leaked_vars to verify the leakproofness  
of the referenced function explicitly.  
  
I didn't add a regression test because it would need to depend on  
some particular comparison function being leaky, and that's a moving  
target, per discussion.  
  
This has been wrong all along, so back-patch to supported branches.  
  
Discussion: https://postgr.es/m/31042.1546194242@sss.pgh.pa.us  

M src/backend/optimizer/util/clauses.c

commit   : dcb04c44af7cd8b5ed90a37ce7ccc71f71277cdd    
  
author   : Bruce Momjian <bruce@momjian.us>    
date     : Wed, 2 Jan 2019 12:44:25 -0500    
  
committer: Bruce Momjian <bruce@momjian.us>    
date     : Wed, 2 Jan 2019 12:44:25 -0500    

Click here for diff

Backpatch-through: certain files through 9.4  

M COPYRIGHT
M doc/src/sgml/legal.sgml

pg_regress: Promptly detect failed postmaster startup.

commit   : 309d16f073fdbc8b5da6a8a7ff4afad01c78e7f6    
  
author   : Noah Misch <noah@leadboat.com>    
date     : Mon, 31 Dec 2018 13:50:32 -0800    
  
committer: Noah Misch <noah@leadboat.com>    
date     : Mon, 31 Dec 2018 13:50:32 -0800    

Click here for diff

Detect it the way pg_ctl's wait_for_postmaster() does.  When pg_regress  
spawned a postmaster that failed startup, we were detecting that only  
with "pg_regress: postmaster did not respond within 60 seconds".  
Back-patch to 9.4 (all supported versions).  
  
Reviewed by Tom Lane.  
  
Discussion: https://postgr.es/m/20181231172922.GA199150@gust.leadboat.com  

M src/test/regress/pg_regress.c

Have DISCARD ALL/TEMP remove leftover temp tables

commit   : 2602838fa33824a0803f3b1f3814889ac7e93192    
  
author   : Alvaro Herrera <alvherre@alvh.no-ip.org>    
date     : Thu, 27 Dec 2018 16:17:40 -0300    
  
committer: Alvaro Herrera <alvherre@alvh.no-ip.org>    
date     : Thu, 27 Dec 2018 16:17:40 -0300    

Click here for diff

Previously, it would only remove temp tables created in the same  
session; but if the session uses the BackendId of a previously crashed  
backend that left temp tables around, those would not get removed.  
Since autovacuum would not drop them either (because it sees that the  
BackendId is in use by the current session) these can cause annoying  
xid-wraparound warnings.  
  
Apply to branches 9.4 to 10.  This is not a problem since version 11,  
because commit 943576bddcb5 added state tracking that makes autovacuum  
realize that those temp tables are not ours, so it removes them.  
  
This is useful to handle in DISCARD, because even though it does not  
handle all situations, it does handle the common one where a connection  
pooler keeps the same session open for an indefinitely long time.  
  
Discussion: https://postgr.es/m/20181226190834.wsk2wzott5yzrjiq@alvherre.pgsql  
Reviewed-by: Takayuki Tsunakawa, Michaël Paquier  

M src/backend/catalog/namespace.c

Make autovacuum more selective about temp tables to keep

commit   : 5199abaca318f0571aa3df09f5b700335d7d62d1    
  
author   : Alvaro Herrera <alvherre@alvh.no-ip.org>    
date     : Thu, 27 Dec 2018 16:00:39 -0300    
  
committer: Alvaro Herrera <alvherre@alvh.no-ip.org>    
date     : Thu, 27 Dec 2018 16:00:39 -0300    

Click here for diff

When temp tables are in danger of XID wraparound, autovacuum drops them;  
however, it preserves those that are owned by a working session.  This  
is desirable, except when the session is connected to a different  
database (because the temp tables cannot be from that session), so make  
it only keep the temp tables only if the backend is in the same database  
as the temp tables.  
  
This is not bulletproof: it fails to detect temp tables left by a  
session whose backend ID is reused in the same database but the new  
session does not use temp tables.  Commit 943576bddcb5 fixes that case  
too, for branches 11 and up (which is why we don't apply this fix to  
those branches), but back-patching that one is not universally agreed  
on.  
  
Discussion: https://postgr.es/m/20181214162843.37g6h3txto43akrb@alvherre.pgsql  
Reviewed-by: Takayuki Tsunakawa, Michaël Paquier  

M src/backend/postmaster/autovacuum.c

Ignore inherited temp relations from other sessions when truncating

commit   : 1d7007671051d04881365c075ed1fc4e36a578f5    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Thu, 27 Dec 2018 10:17:42 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Thu, 27 Dec 2018 10:17:42 +0900    

Click here for diff

Inheritance trees can include temporary tables if the parent is  
permanent, which makes possible the presence of multiple temporary  
children from different sessions.  Trying to issue a TRUNCATE on the  
parent in this scenario causes a failure, so similarly to any other  
queries just ignore such cases, which makes TRUNCATE work  
transparently.  
  
This makes truncation behave similarly to any other DML query working on  
the parent table with queries which need to be issues on children.  A  
set of isolation tests is added to cover basic cases.  
  
Reported-by: Zhou Digoal  
Author: Amit Langote, Michael Paquier  
Discussion: https://postgr.es/m/15565-ce67a48d0244436a@postgresql.org  
Backpatch-through: 9.4  

M src/backend/commands/tablecmds.c
A src/test/isolation/expected/inherit-temp.out
M src/test/isolation/isolation_schedule
A src/test/isolation/specs/inherit-temp.spec

Fix portability failure introduced in commits d2b0b60e7 et al.

commit   : 4f7ab73106a0782fde22f7f405ef36954cb40eb5    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 26 Dec 2018 15:30:10 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 26 Dec 2018 15:30:10 -0500    

Click here for diff

I made a frontend fprintf() format use %m, forgetting that that's only  
safe in HEAD not the back branches; prior to 96bf88d52 and d6c55de1f,  
it would work on glibc platforms but not elsewhere.  Revert to using  
%s ... strerror(errno) as the code did before.  
  
We could have left HEAD as-is, but for code consistency across branches,  
I chose to apply this patch there too.  
  
Per Coverity and a few buildfarm members.  

M src/common/psprintf.c

commit   : b7b0314b80e90130b27e9f5ee4e45778e4cccf09    
  
author   : Peter Eisentraut <peter_e@gmx.net>    
date     : Sat, 22 Dec 2018 07:21:40 +0100    
  
committer: Peter Eisentraut <peter_e@gmx.net>    
date     : Sat, 22 Dec 2018 07:21:40 +0100    

Click here for diff

This has never been correct since this code was introduced.  

M src/bin/initdb/initdb.c
M src/bin/pg_basebackup/pg_basebackup.c

Doc: fix ancient mistake in search_path documentation.

commit   : 773e2d29cd63e2946d200dc5960a3ffb31910fe7    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 20 Dec 2018 13:55:11 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 20 Dec 2018 13:55:11 -0500    

Click here for diff

"$user" in a search_path string is replaced by CURRENT_USER not  
SESSION_USER.  (It actually was SESSION_USER in the initial implementation,  
but we changed it shortly later, and evidently forgot to fix the docs to  
match.)  
  
Noted by antonov@stdpr.ru  
  
Discussion: https://postgr.es/m/159151fb45d490c8d31ea9707e9ba99d@stdpr.ru  

M doc/src/sgml/config.sgml

Fix ancient thinko in mergejoin cost estimation.

commit   : ef673a32d3d799ce7ed0585422dc3b4b67557d6a    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 18 Dec 2018 11:19:39 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 18 Dec 2018 11:19:39 -0500    

Click here for diff

"rescanratio" was computed as 1 + rescanned-tuples / total-inner-tuples,  
which is sensible if it's to be multiplied by total-inner-tuples or a cost  
value corresponding to scanning all the inner tuples.  But in reality it  
was (mostly) multiplied by inner_rows or a related cost, numbers that take  
into account the possibility of stopping short of scanning the whole inner  
relation thanks to a limited key range in the outer relation.  This'd  
still make sense if we could expect that stopping short would result in a  
proportional decrease in the number of tuples that have to be rescanned.  
It does not, however.  The argument that establishes the validity of our  
estimate for that number is independent of whether we scan all of the inner  
relation or stop short, and experimentation also shows that stopping short  
doesn't reduce the number of rescanned tuples.  So the correct calculation  
is 1 + rescanned-tuples / inner_rows, and we should be sure to multiply  
that by inner_rows or a corresponding cost value.  
  
Most of the time this doesn't make much difference, but if we have  
both a high rescan rate (due to lots of duplicate values) and an outer  
key range much smaller than the inner key range, then the error can  
be significant, leading to a large underestimate of the cost associated  
with rescanning.  
  
Per report from Vijaykumar Jain.  This thinko appears to go all the way  
back to the introduction of the rescan estimation logic in commit  
70fba7043, so back-patch to all supported branches.  
  
Discussion: https://postgr.es/m/CAE7uO5hMb_TZYJcZmLAgO6iD68AkEK6qCe7i=vZUkCpoKns+EQ@mail.gmail.com  

M src/backend/optimizer/path/costsize.c

commit   : a75c933a75a3808ec47a22905b13c99ecfb740f8    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Tue, 18 Dec 2018 10:03:19 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Tue, 18 Dec 2018 10:03:19 +0900    

Click here for diff

The project has moved to a new place.  
  
Reported-by: Peter Neave  
Discussion: https://postgr.es/m/154474118231.5066.16352227860913505754@wrigleys.postgresql.org  

M doc/src/sgml/maintenance.sgml

Fix use-after-free bug when renaming constraints

commit   : 696c68c2be44d478403be5c76e6e8160fabdb083    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Mon, 17 Dec 2018 12:44:09 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Mon, 17 Dec 2018 12:44:09 +0900    

Click here for diff

This is an oversight from recent commit b13fd344.  While on it, tweak  
the previous test with a better name for the renamed primary key.  
  
Detected by buildfarm member prion which forces relation cache release  
with -DRELCACHE_FORCE_RELEASE.  Back-patch down to 9.4 as the previous  
commit.  

M src/backend/commands/tablecmds.c
M src/test/regress/expected/alter_table.out
M src/test/regress/sql/alter_table.sql

Make constraint rename issue relcache invalidation on target relation

commit   : d5d86e2cd6b82da7bc57a6b2be8c808463e73d93    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Mon, 17 Dec 2018 10:37:24 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Mon, 17 Dec 2018 10:37:24 +0900    

Click here for diff

When a constraint gets renamed, it may have associated with it a target  
relation (for example domain constraints don't have one).  Not  
invalidating the target relation cache when issuing the renaming can  
result in issues with subsequent commands that refer to the old  
constraint name using the relation cache, causing various failures.  One  
pattern spotted was using CREATE TABLE LIKE after a constraint  
renaming.  
  
Reported-by: Stuart <sfbarbee@gmail.com>  
Author: Amit Langote  
Reviewed-by: Michael Paquier  
Discussion: https://postgr.es/m/2047094.V130LYfLq4@station53.ousa.org  

M src/backend/commands/tablecmds.c
M src/test/regress/expected/alter_table.out
M src/test/regress/sql/alter_table.sql

Make error handling in parallel pg_upgrade less bogus.

commit   : b10d2252b35326566d5520acbc65842927c4c3a1    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sun, 16 Dec 2018 14:51:48 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sun, 16 Dec 2018 14:51:48 -0500    

Click here for diff

reap_child() basically ignored the possibility of either an error in  
waitpid() itself or a child process failure on signal.  We don't really  
need to do more than report and crash hard, but proceeding as though  
nothing is wrong is definitely Not Acceptable.  The error report for  
nonzero child exit status was pretty off-point, as well.  
  
Noted while fooling around with child-process failure detection  
logic elsewhere.  It's been like this a long time, so back-patch to  
all supported branches.  

M contrib/pg_upgrade/parallel.c

Fix wrong backpatching of ginRedoDeletePage() deadlock fix

commit   : bf0e5a73be20b1f010b000c37c9980ac02809fb5    
  
author   : Alexander Korotkov <akorotkov@postgresql.org>    
date     : Thu, 13 Dec 2018 22:32:05 +0300    
  
committer: Alexander Korotkov <akorotkov@postgresql.org>    
date     : Thu, 13 Dec 2018 22:32:05 +0300    

Click here for diff

19cf52e6cc changes lock order in ginRedoDeletePage().  But did it in a wrong  
way due to oversight during backpatching.  This commit fixes that.  
  
Reported-by: Bruce Momjian  
Discussion: https://postgr.es/m/20181213153232.GA10664%40momjian.us  

M src/backend/access/gin/ginxlog.c

Prevent GIN deleted pages from being reclaimed too early

commit   : 1cf175c74f103e9f0905c41d761940282c3d21f1    
  
author   : Alexander Korotkov <akorotkov@postgresql.org>    
date     : Thu, 13 Dec 2018 06:12:31 +0300    
  
committer: Alexander Korotkov <akorotkov@postgresql.org>    
date     : Thu, 13 Dec 2018 06:12:31 +0300    

Click here for diff

When GIN vacuum deletes a posting tree page, it assumes that no concurrent  
searchers can access it, thanks to ginStepRight() locking two pages at once.  
However, since 9.4 searches can skip parts of posting trees descending from the  
root.  That leads to the risk that page is deleted and reclaimed before  
concurrent search can access it.  
  
This commit prevents the risk of above by waiting for every transaction, which  
might wait to reference this page, to finish.  Due to binary compatibility  
we can't change GinPageOpaqueData to store corresponding transaction id.  
Instead we reuse page header pd_prune_xid field, which is unused in index pages.  
  
Discussion: https://postgr.es/m/31a702a.14dd.166c1366ac1.Coremail.chjischj%40163.com  
Author: Andrey Borodin, Alexander Korotkov  
Reviewed-by: Alexander Korotkov  
Backpatch-through: 9.4  

M src/backend/access/gin/README
M src/backend/access/gin/ginutil.c
M src/backend/access/gin/ginvacuum.c
M src/include/access/gin_private.h

Prevent deadlock in ginRedoDeletePage()

commit   : 19cf52e6cc33b9e126775f28269ccccb6ddf7e30    
  
author   : Alexander Korotkov <akorotkov@postgresql.org>    
date     : Thu, 13 Dec 2018 06:12:25 +0300    
  
committer: Alexander Korotkov <akorotkov@postgresql.org>    
date     : Thu, 13 Dec 2018 06:12:25 +0300    

Click here for diff

On standby ginRedoDeletePage() can work concurrently with read-only queries.  
Those queries can traverse posting tree in two ways.  
1) Using rightlinks by ginStepRight(), which locks the next page before  
   unlocking its left sibling.  
2) Using downlinks by ginFindLeafPage(), which locks at most one page at time.  
  
Original lock order was: page, parent, left sibling.  That lock order can  
deadlock with ginStepRight().  In order to prevent deadlock this commit changes  
lock order to: left sibling, page, parent.  Note, that position of parent in  
locking order seems insignificant, because we only lock one page at time while  
traversing downlinks.  
  
Reported-by: Chen Huajun  
Diagnosed-by: Chen Huajun, Peter Geoghegan, Andrey Borodin  
Discussion: https://postgr.es/m/31a702a.14dd.166c1366ac1.Coremail.chjischj%40163.com  
Author: Alexander Korotkov  
Backpatch-through: 9.4  

M src/backend/access/gin/ginxlog.c

Doc: improve documentation about ALTER LARGE OBJECT requirements.

commit   : a96722938ed75401c608c7a2487f3591c7915657    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 11 Dec 2018 11:21:36 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 11 Dec 2018 11:21:36 -0500    

Click here for diff

Unlike other ALTER ref pages, this one neglected to mention that  
ALTER OWNER requires being a member of the new owning role.  
Per bug #15546 from Stefan Kadow.  
  
Discussion: https://postgr.es/m/15546-0558c75fd2025e7c@postgresql.org  

M doc/src/sgml/ref/alter_large_object.sgml

Add stack depth checks to key recursive functions in backend/nodes/*.c.

commit   : 3af726a1f3bfccd0db3ea15c72e2df4943a17180    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 10 Dec 2018 11:12:43 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 10 Dec 2018 11:12:43 -0500    

Click here for diff

Although copyfuncs.c has a check_stack_depth call in its recursion,  
equalfuncs.c, outfuncs.c, and readfuncs.c lacked one.  This seems  
unwise.  
  
Likewise fix planstate_tree_walker(), in branches where that exists.  
  
Discussion: https://postgr.es/m/30253.1544286631@sss.pgh.pa.us  

M src/backend/nodes/equalfuncs.c
M src/backend/nodes/outfuncs.c
M src/backend/nodes/readfuncs.c

Improve our response to invalid format strings, and detect more cases.

commit   : 3a691f8a25a8c71c00918ee1694186de2d928c96    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 6 Dec 2018 15:08:44 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 6 Dec 2018 15:08:44 -0500    

Click here for diff

Places that are testing for *printf failure ought to include the format  
string in their error reports, since bad-format-string is one of the  
more likely causes of such failure.  This both makes it easier to find  
and repair the mistake, and provides at least some useful info to the  
user who stumbles across such a problem.  
  
Also, tighten snprintf.c to report EINVAL for an invalid flag or  
final character in a format %-spec (including the case where the  
%-spec is missing a final character altogether).  This seems like  
better project policy, and it also allows removing an instruction  
or two from the hot code path.  
  
Back-patch the error reporting change in pvsnprintf, since it should be  
harmless and may be helpful; but not the snprintf.c change.  
  
Per discussion of bug #15511 from Ertuğrul Kahveci, which reported an  
invalid translated format string.  These changes don't fix that error,  
but they should improve matters next time we make such a mistake.  
  
Discussion: https://postgr.es/m/15511-1d8b6a0bc874112f@postgresql.org  

M src/common/psprintf.c

Document handling of invalid/ambiguous timestamp input near DST boundaries.

commit   : 6247c0bc2ded1fc92edc55341d9544573e862531    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 29 Nov 2018 18:28:11 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 29 Nov 2018 18:28:11 -0500    

Click here for diff

The source code comments documented this, but the user-facing docs, not  
so much.  Add a section to Appendix B that discusses it.  
  
In passing, improve a couple other things in Appendix B --- notably,  
a long-obsolete claim that time zone abbreviations are looked up in  
a fixed table.  
  
Per bug #15527 from Michael Davidson.  
  
Discussion: https://postgr.es/m/15527-f1be0b4dc99ebbe7@postgresql.org  

M doc/src/sgml/datetime.sgml

Ensure static libraries have correct mod time even if ranlib messes it up.

commit   : 02d310471365b1311537329973176f46540beed0    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 29 Nov 2018 15:53:44 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 29 Nov 2018 15:53:44 -0500    

Click here for diff

In at least Apple's version of ranlib, the output file is updated to have  
a mod time equal to the max of the timestamps of its components, and that  
data only has seconds precision.  On a filesystem with sub-second file  
timestamp precision --- say, APFS --- this can result in the finished  
static library appearing older than its input files, which causes useless  
rebuilds and possible outright failures in parallel makes.  
  
We've only seen this reported in the field from people using Apple's  
ranlib with a non-Apple make, because Apple's make doesn't know about  
sub-second timestamps either so it doesn't decide rebuilds are needed.  
But Apple's ranlib presumably shares code with at least some BSDen,  
so it's not that unlikely that the same problem could arise elsewhere.  
  
To fix, just "touch" the output file after ranlib finishes.  
  
We seem to need this in only one place.  There are other calls of  
ranlib in our makefiles, but they are working on intermediate files  
whose timestamps are not actually important, or else on an installed  
static library for which sub-second timestamp precision is unlikely  
to matter either.  (Also, so far as I can tell, Apple's ranlib doesn't  
mess up the file timestamp in the latter usage anyhow.)  
  
In passing, change "ranlib" to "$(RANLIB)" in one place that was  
bypassing the make macro for no good reason.  
  
Per bug #15525 from Jack Kelly (via Alyssa Ross).  
Back-patch to all supported branches.  
  
Discussion: https://postgr.es/m/15525-a30da084f17a1faa@postgresql.org  

M src/Makefile.shlib

Fix handling of synchronous replication for stopping WAL senders

commit   : b81d08d6001068040a5c0da9bc03473feaae11c1    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Thu, 29 Nov 2018 09:13:04 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Thu, 29 Nov 2018 09:13:04 +0900    

Click here for diff

This fixes an oversight from c6c3334 which has introduced a more strict  
ordering in the way WAL senders are stopped to prevent current WAL  
activity when a shutdown checkpoint is created.  After all backends are  
stopped, all WAL senders are requested to stop which makes them stop any  
activity, and switching their state as stopping.  Once the checkpointer  
knows that all WAL senders are in a stopping state, the shutdown  
checkpoint can begin, with all WAL senders activated, waiting for their  
clients to flush the shutdown checkpoint record.  
  
If a subset of WAL senders are stopping and in a sync state, other WAL  
senders could still be waiting for a WAL position to be synced while  
committing a transaction, however the subset of stopping senders would  
not release waiters, potentially breaking synchronous replication  
guarantees.  This commit makes sure that even WAL senders stopping are  
able to release waiters properly.  
  
On 9.4, this can also trigger an assertion failure when setting for  
example max_wal_senders to 1 where a WAL sender is not able to find  
itself as in synchronous state when the instance stops.  
  
Reported-by: Paul Guo  
Author: Paul Guo, Michael Paquier  
Discussion: https://postgr.es/m/CAEET0ZEv8VFqT3C-cQm6byOB4r4VYWcef1J21dOX-gcVhCSpmA@mail.gmail.com  
Backpatch-through: 9.4  

M src/backend/replication/syncrep.c
M src/backend/replication/walsender.c

Do not decode TOAST data for table rewrites

commit   : c1a5caea82694006047b6193e924ffbbabc87193    
  
author   : Tomas Vondra <tomas.vondra@postgresql.org>    
date     : Wed, 28 Nov 2018 01:11:15 +0100    
  
committer: Tomas Vondra <tomas.vondra@postgresql.org>    
date     : Wed, 28 Nov 2018 01:11:15 +0100    

Click here for diff

During table rewrites (VACUUM FULL and CLUSTER), the main heap is logged  
using XLOG / FPI records, and thus (correctly) ignored in decoding.  
But the associated TOAST table is WAL-logged as plain INSERT records,  
and so was logically decoded and passed to reorder buffer.  
  
That has severe consequences with TOAST tables of non-trivial size.  
Firstly, reorder buffer has to keep all those changes, possibly spilling  
them to a file, incurring I/O costs and disk space.  
  
Secondly, ReoderBufferCommit() was stashing all those TOAST chunks into  
a hash table, which got discarded only after processing the row from the  
main heap.  But as the main heap is not decoded for rewrites, this never  
happened, so all the TOAST data accumulated in memory, resulting either  
in excessive memory consumption or OOM.  
  
The fix is simple, as commit e9edc1ba already introduced infrastructure  
(namely HEAP_INSERT_NO_LOGICAL flag) to skip logical decoding of TOAST  
tables, but it only applied it to system tables.  So simply use it for  
all TOAST data in raw_heap_insert().  
  
That would however solve only the memory consumption issue - the TOAST  
changes would still be decoded and added to the reorder buffer, and  
spilled to disk (although without TOAST tuple data, so much smaller).  
But we can solve that by tweaking DecodeInsert() to just ignore such  
INSERT records altogether, using XLH_INSERT_CONTAINS_NEW_TUPLE flag,  
instead of skipping them later in ReorderBufferCommit().  
  
Review: Masahiko Sawada  
Discussion: https://www.postgresql.org/message-id/flat/1a17c643-e9af-3dba-486b-fbe31bc1823a%402ndquadrant.com  
Backpatch: 9.4-, where logical decoding was introduced  

M src/backend/access/heap/rewriteheap.c
M src/backend/replication/logical/decode.c

doc: fix wording for plpgsql, add “and”

commit   : 6427bfb9066b63b76928d663812044e23fc15820    
  
author   : Bruce Momjian <bruce@momjian.us>    
date     : Mon, 26 Nov 2018 19:41:18 -0500    
  
committer: Bruce Momjian <bruce@momjian.us>    
date     : Mon, 26 Nov 2018 19:41:18 -0500    

Click here for diff

Reported-by: Anthony Greene  
  
Discussion: https://postgr.es/m/CAPRNmnsSZ4QL75FUjcS8ND_oV+WjgyPbZ4ch2RUwmW6PWzF38w@mail.gmail.com  
  
Backpatch-through: 9.4  

M doc/src/sgml/plpgsql.sgml

Fix translation of special characters in psql’s LaTeX output modes.

commit   : 74bfb5388da84541e4df2d6533f2d5cfe665d5fe    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 26 Nov 2018 17:32:51 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 26 Nov 2018 17:32:51 -0500    

Click here for diff

latex_escaped_print() mistranslated \ and failed to provide any translation  
for # ^ and ~, all of which would typically lead to LaTeX document syntax  
errors.  In addition it didn't translate < > and |, which would typically  
render as unexpected characters.  
  
To some extent this represents shortcomings in ancient versions of LaTeX,  
which if memory serves had no easy way to render these control characters  
as ASCII text.  But that's been fixed for, um, decades.  In any case there  
is no value in emitting guaranteed-to-fail output for these characters.  
  
Noted while fooling with test cases added by commit 9a98984f4.  Back-patch  
the code change to all supported versions.  

M src/bin/psql/print.c

Revert “Fix typo in documentation of toast storage”

commit   : 0aa7e38fb7d446e208a5c867ebbce2b490bf7f5b    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Mon, 26 Nov 2018 16:43:19 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Mon, 26 Nov 2018 16:43:19 +0900    

Click here for diff

This reverts commit 058ef3a, per complains from Magnus Hagander and Vik  
Fearing.  

M doc/src/sgml/storage.sgml

Fix typo in documentation of toast storage

commit   : efc9a3876ed9e75641f3f0b24ae2857de4b2e71d    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Mon, 26 Nov 2018 15:49:23 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Mon, 26 Nov 2018 15:49:23 +0900    

Click here for diff

Author: Nawaz Ahmed  
Discussion: https://postgr.es/m/154319327168.1315.1846953598601966513@wrigleys.postgresql.org  

M doc/src/sgml/storage.sgml

Fix hstore hash function for empty hstores upgraded from 8.4.

commit   : e5a6ae97effeca5a80940667e5bffb8672cc7571    
  
author   : Andrew Gierth <rhodiumtoad@postgresql.org>    
date     : Sat, 24 Nov 2018 09:59:49 +0000    
  
committer: Andrew Gierth <rhodiumtoad@postgresql.org>    
date     : Sat, 24 Nov 2018 09:59:49 +0000    

Click here for diff

Hstore data generated on pg 8.4 and pg_upgraded to current versions  
remains in its original on-disk format unless modified. The same goes  
for values generated by the addon hstore-new module on pre-9.0  
versions. (The hstoreUpgrade function converts old values on the fly  
when read in, but the on-disk value is not modified by this.)  
  
Since old-format empty hstores (and hstore-new hstores) have  
representations compatible with the new format, hstoreUpgrade thought  
it could get away without modifying such values; but this breaks  
hstore_hash (and the new hstore_hash_extended) which assumes  
bit-perfect matching between semantically identical hstore values.  
Only one bit actually differs (the "new version" flag in the count  
field) but that of course is enough to break the hash.  
  
Fix by making hstoreUpgrade unconditionally convert all old values to  
new format.  
  
Backpatch all the way, even though this changes a hash value in some  
cases, because in those cases the hash value is already failing - for  
example, a hash join between old- and new-format empty hstores will be  
failing to match, or a hash index on an hstore column containing an  
old-format empty value will be failing to find the value since it will  
be searching for a hash derived from a new-format datum. (There are no  
known field reports of this happening, probably because hashing of  
hstores has only been useful in limited circumstances and there  
probably isn't much upgraded data being used this way.)  
  
Per concerns arising from discussion of commit eb6f29141be. Original  
bug is my fault.  
  
Discussion: https://postgr.es/m/60b1fd3b-7332-40f0-7e7f-f2f04f777747%402ndquadrant.com  

M contrib/hstore/hstore_compat.c

Update additional float4/8 expected-output files.

commit   : bf9fb00dd10705db8135cc67788c22760cdf6812    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sat, 24 Nov 2018 13:53:12 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sat, 24 Nov 2018 13:53:12 -0500    

Click here for diff

I forgot that the back branches have more variant files than HEAD :-(.  
Per buildfarm.  
  
Discussion: https://postgr.es/m/15519-4fc785b483201ff1@postgresql.org  

M src/test/regress/expected/float4-exp-three-digits.out
M src/test/regress/expected/float8-exp-three-digits-win32.out
M src/test/regress/expected/float8-small-is-zero_1.out

Fix float-to-integer coercions to handle edge cases correctly.

commit   : d5231253e3093936e28adc60442841b5ea89e632    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sat, 24 Nov 2018 12:45:50 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sat, 24 Nov 2018 12:45:50 -0500    

Click here for diff

ftoi4 and its sibling coercion functions did their overflow checks in  
a way that looked superficially plausible, but actually depended on an  
assumption that the MIN and MAX comparison constants can be represented  
exactly in the float4 or float8 domain.  That fails in ftoi4, ftoi8,  
and dtoi8, resulting in a possibility that values near the MAX limit will  
be wrongly converted (to negative values) when they need to be rejected.  
  
Also, because we compared before rounding off the fractional part,  
the other three functions threw errors for values that really ought  
to get rounded to the min or max integer value.  
  
Fix by doing rint() first (requiring an assumption that it handles  
NaN and Inf correctly; but dtoi8 and ftoi8 were assuming that already),  
and by comparing to values that should coerce to float exactly, namely  
INTxx_MIN and -INTxx_MIN.  Also remove some random cosmetic discrepancies  
between these six functions.  
  
This back-patches commits cbdb8b4c0 and 452b637d4.  In the 9.4 branch,  
also back-patch the portion of 62e2a8dc2 that added PG_INTnn_MIN and  
related constants to c.h, so that these functions can rely on them.  
  
Per bug #15519 from Victor Petrovykh.  
  
Patch by me; thanks to Andrew Gierth for analysis and discussion.  
  
Discussion: https://postgr.es/m/15519-4fc785b483201ff1@postgresql.org  

M src/backend/utils/adt/float.c
M src/backend/utils/adt/int8.c
M src/include/c.h
M src/test/regress/expected/float4.out
M src/test/regress/expected/float8-small-is-zero.out
M src/test/regress/expected/float8.out
M src/test/regress/sql/float4.sql
M src/test/regress/sql/float8.sql

Avoid crashes in contrib/intarray gist__int_ops (bug #15518)

commit   : 2f30b311df1e7532ef46cdb7a3067377fbf572d9    
  
author   : Andrew Gierth <rhodiumtoad@postgresql.org>    
date     : Fri, 23 Nov 2018 23:56:39 +0000    
  
committer: Andrew Gierth <rhodiumtoad@postgresql.org>    
date     : Fri, 23 Nov 2018 23:56:39 +0000    

Click here for diff

1. Integer overflow in internal_size could result in memory corruption  
in decompression since a zero-length array would be allocated and then  
written to. This leads to crashes or corruption when traversing an  
index which has been populated with sufficiently sparse values. Fix by  
using int64 for computations and checking for overflow.  
  
2. Integer overflow in g_int_compress could cause pessimal merge  
choices, resulting in unnecessarily large ranges (which would in turn  
trigger issue 1 above). Fix by using int64 again.  
  
3. Even without overflow, array sizes could become large enough to  
cause unexplained memory allocation errors. Fix by capping the sizes  
to a safe limit and report actual errors pointing at gist__intbig_ops  
as needed.  
  
4. Large inputs to the compression function always consist of large  
runs of consecutive integers, and the compression loop was processing  
these one at a time in an O(N^2) manner with a lot of overhead. The  
expected runtime of this function could easily exceed 6 months for a  
single call as a result. Fix by performing a linear-time first pass,  
which reduces the worst case to something on the order of seconds.  
  
Backpatch all the way, since this has been wrong forever.  
  
Per bug #15518 from report from irc user "dymk", analysis and patch by  
me.  
  
Discussion: https://postgr.es/m/15518-799e426c3b4f8358@postgresql.org  

M contrib/intarray/_int_gist.c
M contrib/intarray/_int_tool.c

doc: adjust time zone names text, v2

commit   : e341d0336f2f1b1856d2f617cadecdb97356232b    
  
author   : Bruce Momjian <bruce@momjian.us>    
date     : Wed, 21 Nov 2018 17:20:15 -0500    
  
committer: Bruce Momjian <bruce@momjian.us>    
date     : Wed, 21 Nov 2018 17:20:15 -0500    

Click here for diff

Removed one too many words.  Fix for  
7906de847f229f391b9e6b5892b4b4a89f29edb4.  
  
Reported-by: Thomas Munro  
  
Backpatch-through: 9.4  

M doc/src/sgml/datatype.sgml

doc: adjust time zone names text

commit   : 0c70dbb52e677a5ce0a0661533a5d0ef7feabe30    
  
author   : Bruce Momjian <bruce@momjian.us>    
date     : Wed, 21 Nov 2018 16:55:39 -0500    
  
committer: Bruce Momjian <bruce@momjian.us>    
date     : Wed, 21 Nov 2018 16:55:39 -0500    

Click here for diff

Reported-by: Kevin <kcolagio@gmail.com>  
  
Discussion: https://postgr.es/m/154082462281.30897.14043119084654378035@wrigleys.postgresql.org  
  
Backpatch-through: 9.4  

M doc/src/sgml/datatype.sgml

doc: Clarify CREATE TYPE ENUM documentation

commit   : 3954554464a5cc62651f6f15fa1a053251060ebb    
  
author   : Peter Eisentraut <peter_e@gmx.net>    
date     : Tue, 13 Nov 2018 10:42:43 +0100    
  
committer: Peter Eisentraut <peter_e@gmx.net>    
date     : Tue, 13 Nov 2018 10:42:43 +0100    

Click here for diff

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  

M doc/src/sgml/ref/create_type.sgml

Fix old TAP tests’ method for selecting a valid PGPORT value.

commit   : e1d8f18b8700aee13d4b0927898ba4ad6fa15852    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 19 Nov 2018 20:01:35 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 19 Nov 2018 20:01:35 -0500    

Click here for diff

This code was trying to be paranoid, but it wasn't paranoid enough.  
It only ensured that the selected port is in 0..65535, while most  
Unix systems will refuse unprivileged attempts to use TCP port numbers  
below 1024.  
  
Change it to allow specification of ports 1024..65535, while if the  
port is outside that range, map it into 49152..65535 which is the  
port range used by our later branches.  
  
The main reason we've not noticed this up to now is that it's not  
important when testing over Unix-socket connections, only TCP,  
and most of our test code deliberately prevents the postmaster from  
opening any TCP ports.  However, the SSL tests do open up a TCP port,  
and I believe this explains why buildfarm member chipmunk has been  
failing the SSL tests in 9.5: it's picking a reserved port number.  
  
Patch in 9.5 and 9.4.  Later branches do not use this code.  

M src/test/perl/TestLib.pm

Back-patch updated thread flags tests into 9.4 and 9.5.

commit   : 7c86b94311ecaccc525be0581a17a15d46692ffb    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 19 Nov 2018 14:24:52 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 19 Nov 2018 14:24:52 -0500    

Click here for diff

This commit back-patches these 9.6-era commits into 9.4 and 9.5:  
  
e97af6c8b Replace our hacked version of ax_pthread.m4 with latest upstream version.  
3b14a17c8 Move pthread-tests earlier in the autoconf script.  
01051a987 Use AS_IF rather than plain shell "if" in pthread-check.  
a2932283c Update ax_pthread.m4 to an experimental draft version from upstream.  
  
The net result is to sync configure's checks for threading-related  
flags and libraries with the version we've been using since 9.6.  
The motivation for doing so now is that it seems the older code does  
not work correctly on very recent RHEL7/ppc64, as evidenced by  
buildfarm member quokka.  The newer code is pretty battle-hardened  
by now, so this seems like a low-risk fix.  
  
Discussion: https://postgr.es/m/3320.1542647565@sss.pgh.pa.us  

M aclocal.m4
D config/acx_pthread.m4
A config/ax_pthread.m4
M configure
M configure.in
M src/include/pg_config.h.in

Fix configure’s AC_CHECK_DECLS tests to work correctly with clang.

commit   : 5fcb210e8d0ec5ba982daaa3c323b368c4554f8d    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 19 Nov 2018 12:01:47 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 19 Nov 2018 12:01:47 -0500    

Click here for diff

The test case that Autoconf uses to discover whether a function has  
been declared doesn't work reliably with clang, because clang reports  
a warning not an error if the name is a known built-in function.  
On some platforms, this results in a lot of compile-time warnings about  
strlcpy and related functions not having been declared.  
  
There is a fix for this (by Noah Misch) in the upstream Autoconf sources,  
but since they've not made a release in years and show no indication of  
doing so anytime soon, let's just absorb their fix directly.  We can  
revert this when and if we update to a newer Autoconf release.  
  
Back-patch to all supported branches.  
  
Discussion: https://postgr.es/m/26819.1542515567@sss.pgh.pa.us  

M aclocal.m4
A config/check_decls.m4
M configure
M configure.in

PANIC on fsync() failure.

commit   : f1ff5f51d2490817c2b3bba202f4e2c73a846389    
  
author   : Thomas Munro <tmunro@postgresql.org>    
date     : Mon, 19 Nov 2018 13:40:57 +1300    
  
committer: Thomas Munro <tmunro@postgresql.org>    
date     : Mon, 19 Nov 2018 13:40:57 +1300    

Click here for diff

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  

M doc/src/sgml/config.sgml
M src/backend/access/heap/rewriteheap.c
M src/backend/access/transam/slru.c
M src/backend/access/transam/timeline.c
M src/backend/access/transam/xlog.c
M src/backend/replication/logical/snapbuild.c
M src/backend/storage/file/fd.c
M src/backend/storage/smgr/md.c
M src/backend/utils/cache/relmapper.c
M src/backend/utils/misc/guc.c
M src/backend/utils/misc/postgresql.conf.sample
M src/include/storage/fd.h

Don’t forget about failed fsync() requests.

commit   : 2b2010d12a62c4b77fdffbd988f5cbbcdcddb98e    
  
author   : Thomas Munro <tmunro@postgresql.org>    
date     : Mon, 19 Nov 2018 13:40:50 +1300    
  
committer: Thomas Munro <tmunro@postgresql.org>    
date     : Mon, 19 Nov 2018 13:40:50 +1300    

Click here for diff

If fsync() fails, md.c must keep the request in its bitmap, so that  
future attempts will try again.  
  
Back-patch to all supported releases.  
  
Author: Thomas Munro  
Reviewed-by: Amit Kapila  
Reported-by: Andrew Gierth  
Discussion: https://postgr.es/m/87y3i1ia4w.fsf%40news-spur.riddles.org.uk  

M src/backend/storage/smgr/md.c

Add valgrind suppressions for wcsrtombs optimizations

commit   : 41344896364c4bf2229ec590c95cf23a6bec928e    
  
author   : Tomas Vondra <tomas.vondra@postgresql.org>    
date     : Sat, 17 Nov 2018 23:50:21 +0100    
  
committer: Tomas Vondra <tomas.vondra@postgresql.org>    
date     : Sat, 17 Nov 2018 23:50:21 +0100    

Click here for diff

wcsrtombs (called through wchar2char from common functions like lower,  
upper, etc.) uses various optimizations that may look like access to  
uninitialized data, triggering valgrind reports.  
  
For example AVX2 instructions load data in 256-bit chunks, and  gconv  
does something similar with 32-bit chunks.  This is faster than accessing  
the bytes one by one, and the uninitialized part of the buffer is not  
actually used. So suppress the bogus reports.  
  
The exact stack depends on possible optimizations - it might be AVX, SSE  
(as in the report by Aleksander Alekseev) or something else. Hence the  
last frame is wildcarded, to deal with this.  
  
Backpatch all the way back to 9.4.  
  
Author: Tomas Vondra  
Discussion: https://www.postgresql.org/message-id/flat/90ac0452-e907-e7a4-b3c8-15bd33780e62%402ndquadrant.com  
Discussion: https://www.postgresql.org/message-id/20180220150838.GD18315@e733.localdomain  

M src/tools/valgrind.supp

Doc: remove claim that all \pset format options are unique in 1 letter.

commit   : 6a312b2587c62eef0941a24a517590a9ce299fa9    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 14 Nov 2018 16:29:57 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 14 Nov 2018 16:29:57 -0500    

Click here for diff

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  

M doc/src/sgml/ref/psql-ref.sgml

Second try at fixing numeric data passed through an ECPG SQLDA.

commit   : 41609776f2c2869f2081439664249c9bdec83add    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 14 Nov 2018 11:27:31 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 14 Nov 2018 11:27:31 -0500    

Click here for diff

In commit ecfd55795, I removed sqlda.c's checks for ndigits != 0 on the  
grounds that we should duplicate the state of the numeric value's digit  
buffer even when all the digits are zeroes.  However, that still isn't  
quite right, because another possible state of the digit buffer is  
buf == digits == NULL (this occurs for a NaN).  As the code now stands,  
it'll invoke memcpy with a NULL source address and zero bytecount,  
which we know a few platforms crash on.  Hence, reinstate the no-copy  
short-circuit, but make it test specifically for buf != NULL rather than  
some other condition.  In hindsight, the ndigits test (added by commit  
f2ae9f9c3) was almost certainly meant to fix the NaN case not the  
all-zeroes case as the associated thread alleged.  
  
As before, back-patch to all supported versions.  
  
Discussion: https://postgr.es/m/1803D792815FC24D871C00D17AE95905C71161@g01jpexmbkw24  

M src/interfaces/ecpg/ecpglib/sqlda.c
M src/interfaces/ecpg/test/expected/sql-sqlda.c
M src/interfaces/ecpg/test/expected/sql-sqlda.stderr
M src/interfaces/ecpg/test/expected/sql-sqlda.stdout
M src/interfaces/ecpg/test/sql/sqlda.pgc

Initialize TransactionState and user ID consistently at transaction start

commit   : e85b729375ed33b478aafbb981cd29cb31c58370    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Wed, 14 Nov 2018 16:48:26 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Wed, 14 Nov 2018 16:48:26 +0900    

Click here for diff

If a failure happens when a transaction is starting between the moment  
the transaction status is changed from TRANS_DEFAULT to TRANS_START and  
the moment the current user ID and security context flags are fetched  
via GetUserIdAndSecContext(), or before initializing its basic fields,  
then those may get reset to incorrect values when the transaction  
aborts, leaving the session in an inconsistent state.  
  
One problem reported is that failing a starting transaction at the first  
query of a session could cause several kinds of system crashes on the  
follow-up queries.  
  
In order to solve that, move the initialization of the transaction state  
fields and the call of GetUserIdAndSecContext() in charge of fetching  
the current user ID close to the point where the transaction status is  
switched to TRANS_START, where there cannot be any error triggered  
in-between, per an idea of Tom Lane.  This properly ensures that the  
current user ID, the security context flags and that the basic fields of  
TransactionState remain consistent even if the transaction fails while  
starting.  
  
Reported-by: Richard Guo  
Diagnosed-By: Richard Guo  
Author: Michael Paquier  
Reviewed-by: Tom Lane  
Discussion: https://postgr.es/m/CAN_9JTxECSb=pEPcb0a8d+6J+bDcOZ4=DgRo_B7Y5gRHJUM=Rw@mail.gmail.com  
Backpatch-through: 9.4  

M src/backend/access/transam/xact.c

Fix incorrect results for numeric data passed through an ECPG SQLDA.

commit   : 9e5e3861c78299c0c44c3fc5b635efc2853f1faf    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 13 Nov 2018 15:46:08 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 13 Nov 2018 15:46:08 -0500    

Click here for diff

Numeric values with leading zeroes were incorrectly copied into a  
SQLDA (SQL Descriptor Area), leading to wrong results in ECPG programs.  
  
Report and patch by Daisuke Higuchi.  Back-patch to all supported  
versions.  
  
Discussion: https://postgr.es/m/1803D792815FC24D871C00D17AE95905C71161@g01jpexmbkw24  

M src/interfaces/ecpg/ecpglib/sqlda.c
M src/interfaces/ecpg/test/expected/sql-sqlda.c
M src/interfaces/ecpg/test/expected/sql-sqlda.stderr
M src/interfaces/ecpg/test/expected/sql-sqlda.stdout
M src/interfaces/ecpg/test/sql/sqlda.pgc

Limit the number of index clauses considered in choose_bitmap_and().

commit   : 2abc87953197397c18f997a30f5bb435e0d283e7    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 12 Nov 2018 11:19:04 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 12 Nov 2018 11:19:04 -0500    

Click here for diff

classify_index_clause_usage() is O(N^2) in the number of distinct index  
qual clauses it considers, because of its use of a simple search list to  
store them.  For nearly all queries, that's fine because only a few clauses  
will be considered.  But Alexander Kuzmenkov reported a machine-generated  
query with 80000 (!) index qual clauses, which caused this code to take  
forever.  Somewhat remarkably, this is the only O(N^2) behavior we now  
have for such a query, so let's fix it.  
  
We can get rid of the O(N^2) runtime for cases like this without much  
damage to the functionality of choose_bitmap_and() by separating out  
paths with "too many" qual or pred clauses, and deeming them to always  
be nonredundant with other paths.  Then their clauses needn't go into  
the search list, so it doesn't get too long, but we don't lose the  
ability to consider bitmap AND plans altogether.  I set the threshold  
for "too many" to be 100 clauses per path, which should be plenty to  
ensure no change in planning behavior for normal queries.  
  
There are other things we could do to make this go faster, but it's not  
clear that it's worth any additional effort.  80000 qual clauses require  
a whole lot of work in many other places, too.  
  
The code's been like this for a long time, so back-patch to all supported  
branches.  The troublesome query only works back to 9.5 (in 9.4 it fails  
with stack overflow in the parser); so I'm not sure that fixing this in  
9.4 has any real-world benefit, but perhaps it does.  
  
Discussion: https://postgr.es/m/90c5bdfa-d633-dabe-9889-3cf3e1acd443@postgrespro.ru  

M src/backend/optimizer/path/indxpath.c

Fix missing role dependencies for some schema and type ACLs.

commit   : 277602dfee51489994d29d889592fcff9f73bf73    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 9 Nov 2018 20:42:03 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 9 Nov 2018 20:42:03 -0500    

Click here for diff

This patch fixes several related cases in which pg_shdepend entries were  
never made, or were lost, for references to roles appearing in the ACLs of  
schemas and/or types.  While that did no immediate harm, if a referenced  
role were later dropped, the drop would be allowed and would leave a  
dangling reference in the object's ACL.  That still wasn't a big problem  
for normal database usage, but it would cause obscure failures in  
subsequent dump/reload or pg_upgrade attempts, taking the form of  
attempts to grant privileges to all-numeric role names.  (I think I've  
seen field reports matching that symptom, but can't find any right now.)  
  
Several cases are fixed here:  
  
1. ALTER DOMAIN SET/DROP DEFAULT would lose the dependencies for any  
existing ACL entries for the domain.  This case is ancient, dating  
back as far as we've had pg_shdepend tracking at all.  
  
2. If a default type privilege applies, CREATE TYPE recorded the  
ACL properly but forgot to install dependency entries for it.  
This dates to the addition of default privileges for types in 9.2.  
  
3. If a default schema privilege applies, CREATE SCHEMA recorded the  
ACL properly but forgot to install dependency entries for it.  
This dates to the addition of default privileges for schemas in v10  
(commit ab89e465c).  
  
Another somewhat-related problem is that when creating a relation  
rowtype or implicit array type, TypeCreate would apply any available  
default type privileges to that type, which we don't really want  
since such an object isn't supposed to have privileges of its own.  
(You can't, for example, drop such privileges once they've been added  
to an array type.)  
  
ab89e465c is also to blame for a race condition in the regression tests:  
privileges.sql transiently installed globally-applicable default  
privileges on schemas, which sometimes got absorbed into the ACLs of  
schemas created by concurrent test scripts.  This should have resulted  
in failures when privileges.sql tried to drop the role holding such  
privileges; but thanks to the bug fixed here, it instead led to dangling  
ACLs in the final state of the regression database.  We'd managed not to  
notice that, but it became obvious in the wake of commit da906766c, which  
allowed the race condition to occur in pg_upgrade tests.  
  
To fix, add a function recordDependencyOnNewAcl to encapsulate what  
callers of get_user_default_acl need to do; while the original call  
sites got that right via ad-hoc code, none of the later-added ones  
have.  Also change GenerateTypeDependencies to generate these  
dependencies, which requires adding the typacl to its parameter list.  
(That might be annoying if there are any extensions calling that  
function directly; but if there are, they're most likely buggy in the  
same way as the core callers were, so they need work anyway.)  While  
I was at it, I changed GenerateTypeDependencies to accept most of its  
parameters in the form of a Form_pg_type pointer, making its parameter  
list a bit less unwieldy and mistake-prone.  
  
The test race condition is fixed just by wrapping the addition and  
removal of default privileges into a single transaction, so that that  
state is never visible externally.  We might eventually prefer to  
separate out tests of default privileges into a script that runs by  
itself, but that would be a bigger change and would make the tests  
run slower overall.  
  
Back-patch relevant parts to all supported branches.  
  
Discussion: https://postgr.es/m/15719.1541725287@sss.pgh.pa.us  

M src/backend/catalog/aclchk.c
M src/backend/catalog/heap.c
M src/backend/catalog/pg_proc.c
M src/backend/catalog/pg_type.c
M src/backend/commands/typecmds.c
M src/include/catalog/pg_type_fn.h
M src/include/utils/acl.h

Disallow setting client_min_messages higher than ERROR.

commit   : 2407d4807fdc1d536fb27ac8c38cfa0e21be4eba    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 8 Nov 2018 17:33:26 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 8 Nov 2018 17:33:26 -0500    

Click here for diff

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  

M doc/src/sgml/config.sgml
M src/backend/utils/error/elog.c
M src/backend/utils/misc/guc.c
M src/backend/utils/misc/postgresql.conf.sample

GUC: adjust effective_cache_size SQL descriptions

commit   : b8db4c2af0fc7d1fc335bcc20f7479e11452cacb    
  
author   : Bruce Momjian <bruce@momjian.us>    
date     : Tue, 6 Nov 2018 13:40:02 -0500    
  
committer: Bruce Momjian <bruce@momjian.us>    
date     : Tue, 6 Nov 2018 13:40:02 -0500    

Click here for diff

Follow on patch for commit 3e0f1a4741f564c1a2fa6e944729d6967355d8c7.  
  
Reported-by: Peter Eisentraut  
  
Discussion: https://postgr.es/m/369ec766-b947-51bd-4dad-6fb9e026439f@2ndquadrant.com  
  
Backpatch-through: 9.4  

M src/backend/utils/misc/guc.c