PostgreSQL 11.9 (upcoming) commit log

Fix yet another issue with step generation in partition pruning.

commit   : 1db9c80f835e436ca3c27bccf43135ebf7e3c62b    
  
author   : Etsuro Fujita <efujita@postgresql.org>    
date     : Fri, 7 Aug 2020 14:45:04 +0900    
  
committer: Etsuro Fujita <efujita@postgresql.org>    
date     : Fri, 7 Aug 2020 14:45:04 +0900    

Click here for diff

Commit 13838740f fixed some issues with step generation in partition  
pruning, but there was yet another one: get_steps_using_prefix() assumes  
that clauses in the passed-in prefix list are sorted in ascending order  
of their partition key numbers, but the caller failed to ensure this for  
range partitioning, which led to an assertion failure in debug builds.  
Adjust the caller function to arrange the clauses in the prefix list in  
the required order for range partitioning.  
  
Back-patch to v11, like the previous commit.  
  
Patch by me, reviewed by Amit Langote.  
  
Discussion: https://postgr.es/m/CAPmGK16jkXiFG0YqMbU66wte-oJTfW6D1HaNvQf%3D%2B5o9%3Dm55wQ%40mail.gmail.com  

M src/backend/partitioning/partprune.c
M src/test/regress/expected/partition_prune.out
M src/test/regress/sql/partition_prune.sql

Fix typo.

commit   : 495a9b1fbfe890d5da2aaf52ee06a8fd4f4fe339    
  
author   : Robert Haas <rhaas@postgresql.org>    
date     : Thu, 6 Aug 2020 14:55:00 -0400    
  
committer: Robert Haas <rhaas@postgresql.org>    
date     : Thu, 6 Aug 2020 14:55:00 -0400    

Click here for diff

Per report from Tom Lane. Previously fixed in master by  
commit f057980149ddccd4b862d2c6b3920ed498b0d7ec.  

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

Fix minor problems with non-exclusive backup cleanup.

commit   : f7013683d9bb663a6a917421b1374306a32f165b    
  
author   : Robert Haas <rhaas@postgresql.org>    
date     : Thu, 6 Aug 2020 13:58:23 -0400    
  
committer: Robert Haas <rhaas@postgresql.org>    
date     : Thu, 6 Aug 2020 13:58:23 -0400    

Click here for diff

The previous coding imagined that it could call before_shmem_exit()  
when a non-exclusive backup began and then remove the previously-added  
handler by calling cancel_before_shmem_exit() when that backup  
ended. However, this only works provided that nothing else in the  
system has registered a before_shmem_exit() hook in the interim,  
because cancel_before_shmem_exit() is documented to remove a callback  
only if it is the latest callback registered. It also only works  
if nothing can ERROR out between the time that sessionBackupState  
is reset and the time that cancel_before_shmem_exit(), which doesn't  
seem to be strictly true.  
  
To fix, leave the handler installed for the lifetime of the session,  
arrange to install it just once, and teach it to quietly do nothing if  
there isn't a non-exclusive backup in process.  
  
This was originally committed to master as  
303640199d0436c5e7acdf50b837a027b5726594, but I did not back-patch  
at the time because the consequences were minor. However, now  
there's been a second report of this causing trouble with a slightly  
different test case than the one I reported originally, so now  
I'm back-patching as far as v11 where JIT was introduced.  
  
Patch by me, reviewed by Kyotaro Horiguchi, Michael Paquier (who  
preferred a different approach, but got outvoted), Fujii Masao,  
and Tom Lane, and with comments by various others. New problem  
report from Bharath Rupireddy.  
  
Discussion: http://postgr.es/m/CA+TgmobMjnyBfNhGTKQEDbqXYE3_rXWpc4CM63fhyerNCes3mA@mail.gmail.com  
Discussion: http://postgr.es/m/CALj2ACWk7j4F2v2fxxYfrroOF=AdFNPr1WsV+AGtHAFQOqm_pw@mail.gmail.com  

M src/backend/access/transam/xlog.c
M src/backend/access/transam/xlogfuncs.c
M src/backend/replication/basebackup.c
M src/include/access/xlog.h

doc: clarify "state" table reference in tutorial

commit   : b144edbf7d1714ec7471f47952ba88fa991ff79f    
  
author   : Bruce Momjian <bruce@momjian.us>    
date     : Wed, 5 Aug 2020 17:12:10 -0400    
  
committer: Bruce Momjian <bruce@momjian.us>    
date     : Wed, 5 Aug 2020 17:12:10 -0400    

Click here for diff

Reported-by: Vyacheslav Shablistyy  
  
Discussion: https://postgr.es/m/159586122762.680.1361378513036616007@wrigleys.postgresql.org  
  
Backpatch-through: 9.5  

M doc/src/sgml/advanced.sgml

Increase hard-wired timeout values in ecpg regression tests.

commit   : f45cbed4c5781b30e7f4c4a500649b75f06bb0c3    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 4 Aug 2020 15:20:31 -0400    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 4 Aug 2020 15:20:31 -0400    

Click here for diff

A couple of test cases had connect_timeout=14, a value that seems  
to have been plucked from a hat.  While it's more than sufficient  
for normal cases, slow/overloaded buildfarm machines can get a timeout  
failure here, as per recent report from "sungazer".  Increase to 180  
seconds, which is in line with our typical timeouts elsewhere in  
the regression tests.  
  
Back-patch to 9.6; the code looks different in 9.5, and this doesn't  
seem to be quite worth the effort to adapt to that.  
  
Report: https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=sungazer&dt=2020-08-04%2007%3A12%3A22  

M src/interfaces/ecpg/test/connect/test1.pgc
M src/interfaces/ecpg/test/connect/test5.pgc
M src/interfaces/ecpg/test/expected/connect-test1-minGW32.stderr
M src/interfaces/ecpg/test/expected/connect-test1.c
M src/interfaces/ecpg/test/expected/connect-test1.stderr
M src/interfaces/ecpg/test/expected/connect-test5.c
M src/interfaces/ecpg/test/expected/connect-test5.stderr

Doc: fix obsolete info about allowed range of TZ offsets in timetz.

commit   : 995c53b44999c3a04ca54351dbc2d51bce82e55e    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 3 Aug 2020 13:11:16 -0400    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 3 Aug 2020 13:11:16 -0400    

Click here for diff

We've allowed UTC offsets up to +/- 15:59 since commit cd0ff9c0f, but  
that commit forgot to fix the documentation about timetz.  
  
Per bug #16571 from osdba.  
  
Discussion: https://postgr.es/m/16571-eb7501598de78c8a@postgresql.org  

M doc/src/sgml/datatype.sgml

Fix rare failure in LDAP tests.

commit   : 1beb3ac5184fd32e8a1a79f4ace477a9e7ea27a7    
  
author   : Thomas Munro <tmunro@postgresql.org>    
date     : Mon, 3 Aug 2020 12:39:15 +1200    
  
committer: Thomas Munro <tmunro@postgresql.org>    
date     : Mon, 3 Aug 2020 12:39:15 +1200    

Click here for diff

Instead of writing a query to psql's stdin, use -c.  This avoids a  
failure where psql exits before we write, seen a few times on the build  
farm.  Thanks to Tom Lane for the suggestion.  
  
Back-patch to 11, where the LDAP tests arrived.  
  
Reviewed-by: Noah Misch <noah@leadboat.com>  
Discussion: https://postgr.es/m/CA%2BhUKGLFmW%2BHQYPeKiwSp5sdFFHtFViCpw4Mh6yAgEx74r5-Cw%40mail.gmail.com  

M src/test/ldap/t/001_auth.pl

Adjust pgcrypto's expected test results for --disable-strong-random.

commit   : 1785ac8adebeb04aed6097d0d425f0c940f8fafb    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sun, 2 Aug 2020 11:00:12 -0400    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sun, 2 Aug 2020 11:00:12 -0400    

Click here for diff

These files were missed when commit a3ab7a707 added a new test query.  
Understandable considering these files no longer exist in HEAD.  
Per buildfarm member pademelon.  

M contrib/pgcrypto/expected/pgp-compression_1.out

Restore lost amcheck TOAST test coverage.

commit   : a4ad7ac2d8d422f6aad3dec46f13e6b0bd6bd7ed    
  
author   : Peter Geoghegan <pg@bowt.ie>    
date     : Fri, 31 Jul 2020 15:34:23 -0700    
  
committer: Peter Geoghegan <pg@bowt.ie>    
date     : Fri, 31 Jul 2020 15:34:23 -0700    

Click here for diff

Commit eba77534 fixed an amcheck false positive bug involving  
inconsistencies in TOAST input state between table and index.  A test  
case was added that verified that such an inconsistency didn't result in  
a spurious corruption related error.  
  
Test coverage from the test was accidentally lost by commit 501e41dd,  
which propagated ALTER TABLE ...  SET STORAGE attstorage state to  
indexes.  This broke the test because the test specifically relied on  
attstorage not being propagated.  This artificially forced there to be  
index tuples whose datums were equivalent to the datums in the heap  
without the datums actually being bitwise equal.  
  
Fix this by updating pg_attribute directly instead.  Commit 501e41dd  
made similar changes to a test_decoding TOAST-related test case which  
made the same assumption, but overlooked the amcheck test case.  
  
Backpatch: 11-, just like commit eba77534 (and commit 501e41dd).  

M contrib/amcheck/expected/check_btree.out
M contrib/amcheck/sql/check_btree.sql

Fix recently-introduced performance problem in ts_headline().

commit   : da596fb4b03eec452587247e2784e4a3c455d4dd    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 31 Jul 2020 11:43:12 -0400    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 31 Jul 2020 11:43:12 -0400    

Click here for diff

The new hlCover() algorithm that I introduced in commit c9b0c678d  
turns out to potentially take O(N^2) or worse time on long documents,  
if there are many occurrences of individual query words but few or no  
substrings that actually satisfy the query.  (One way to hit this  
behavior is with a "common_word & rare_word" type of query.)  This  
seems unavoidable given the original goal of checking every substring  
of the document, so we have to back off that idea.  Fortunately, it  
seems unlikely that anyone would really want headlines spanning all of  
a long document, so we can avoid the worse-than-linear behavior by  
imposing a maximum length of substring that we'll consider.  
  
For now, just hard-wire that maximum length as a multiple of max_words  
times max_fragments.  Perhaps at some point somebody will argue for  
exposing it as a ts_headline parameter, but I'm hesitant to make such  
a feature addition in a back-patched bug fix.  
  
I also noted that the hlFirstIndex() function I'd added in that  
commit was unnecessarily stupid: it really only needs to check whether  
a HeadlineWordEntry's item pointer is null or not.  This wouldn't make  
all that much difference in typical cases with queries having just  
a few terms, but a cycle shaved is a cycle earned.  
  
In addition, add a CHECK_FOR_INTERRUPTS call in TS_execute_recurse.  
This ensures that hlCover's loop is cancellable if it manages to take  
a long time, and it may protect some other TS_execute callers as well.  
  
Back-patch to 9.6 as the previous commit was.  I also chose to add the  
CHECK_FOR_INTERRUPTS call to 9.5.  The old hlCover() algorithm seems  
to avoid the O(N^2) behavior, at least on the test case I tried, but  
nonetheless it's not very quick on a long document.  
  
Per report from Stephen Frost.  
  
Discussion: https://postgr.es/m/20200724160535.GW12375@tamriel.snowman.net  

M src/backend/tsearch/wparser_def.c
M src/backend/utils/adt/tsvector_op.c

Doc: fix high availability solutions comparison.

commit   : 065699590a90e3421bd3fb805d1469f4d544e8a5    
  
author   : Tatsuo Ishii <ishii@postgresql.org>    
date     : Fri, 31 Jul 2020 07:49:00 +0900    
  
committer: Tatsuo Ishii <ishii@postgresql.org>    
date     : Fri, 31 Jul 2020 07:49:00 +0900    

Click here for diff

In "High Availability, Load Balancing, and Replication" chapter,  
certain descriptions of Pgpool-II were not correct at this point.  It  
does not need conflict resolution. Also "Multiple-Server Parallel  
Query Execution" is not supported anymore.  
  
Discussion: https://postgr.es/m/20200726.230128.53842489850344110.t-ishii%40sraoss.co.jp  
Author: Tatsuo Ishii  
Reviewed-by: Bruce Momjian  
Backpatch-through: 9.5  

M doc/src/sgml/high-availability.sgml

doc: Mention index references in pg_inherits

commit   : 255c707c87339110c04bc7240cf79bceb1a118d3    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Thu, 30 Jul 2020 15:49:01 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Thu, 30 Jul 2020 15:49:01 +0900    

Click here for diff

Partitioned indexes are also registered in pg_inherits, but the  
description of this catalog did not reflect that.  
  
Author: Dagfinn Ilmari Mannsåker  
Discussion: https://postgr.es/m/87k0ynj35y.fsf@wibble.ilmari.org  
Backpatch-through: 11  

M doc/src/sgml/catalogs.sgml

Backpatch tuplesort.c assertion.

commit   : 87eb25535d0db49fec9b3ddb2f1c4dfd97c8805e    
  
author   : Peter Geoghegan <pg@bowt.ie>    
date     : Wed, 29 Jul 2020 16:00:54 -0700    
  
committer: Peter Geoghegan <pg@bowt.ie>    
date     : Wed, 29 Jul 2020 16:00:54 -0700    

Click here for diff

Backpatch an assertion (that was originally added to Postgres 12 by  
commit dd299df8189) that seems broadly useful.  The assertion can detect  
violations of the HOT invariant (i.e. no two index tuples can point to  
the same heap TID) when CREATE INDEX somehow incorrectly allows that to  
take place.  
  
For example, a IndexBuildHeapScan/heapam_index_build_range_scan bug  
might result in two tuples that both point to the same heap TID.  If  
these two tuples also happen to be duplicates, the assertion will fail.  
  
Discussion: https://postgr.es/m/CAH2-WzmBxu4o=pMsniur+bwHqCGCmV_AOLkuK6BuU7ngA6evqw@mail.gmail.com  
Backpatch: 9.5-11 only  

M src/backend/utils/sort/tuplesort.c

Doc: Improve documentation for pg_jit_available()

commit   : baecd2715b5cd4c0e596bc4ba438957ef88e1d25    
  
author   : David Rowley <drowley@postgresql.org>    
date     : Tue, 28 Jul 2020 22:52:58 +1200    
  
committer: David Rowley <drowley@postgresql.org>    
date     : Tue, 28 Jul 2020 22:52:58 +1200    

Click here for diff

Per complaint from Scott Ribe. Based on wording suggestion from Tom Lane.  
  
Discussion: https://postgr.es/m/1956E806-1468-4417-9A9D-235AE1D5FE1A@elevated-dev.com  
Backpatch-through: 11, where pg_jit_available() was added  

M doc/src/sgml/func.sgml

Fix some issues with step generation in partition pruning.

commit   : bead29decf906cf53e1578bf878690b4107891d9    
  
author   : Etsuro Fujita <efujita@postgresql.org>    
date     : Tue, 28 Jul 2020 11:00:03 +0900    
  
committer: Etsuro Fujita <efujita@postgresql.org>    
date     : Tue, 28 Jul 2020 11:00:03 +0900    

Click here for diff

In the case of range partitioning, get_steps_using_prefix() assumes that  
the passed-in prefix list contains at least one clause for each of the  
partition keys earlier than one specified in the passed-in  
step_lastkeyno, but the caller (ie, gen_prune_steps_from_opexps())  
didn't take it into account, which led to a server crash or incorrect  
results when the list contained no clauses for such partition keys, as  
reported in bug #16500 and #16501 from Kobayashi Hisanori.  Update the  
caller to call that function only when the list created there contains  
at least one clause for each of the earlier partition keys in the case  
of range partitioning.  
  
While at it, fix some other issues:  
  
* The list to pass to get_steps_using_prefix() is allowed to contain  
  multiple clauses for the same partition key, as described in the  
  comment for that function, but that function actually assumed that the  
  list contained just a single clause for each of middle partition keys,  
  which led to an assertion failure when the list contained multiple  
  clauses for such partition keys.  Update that function to match the  
  comment.  
* In the case of hash partitioning, partition keys are allowed to be  
  NULL, in which case the list to pass to get_steps_using_prefix()  
  contains no clauses for NULL partition keys, but that function treats  
  that case as like the case of range partitioning, which led to the  
  assertion failure.  Update the assertion test to take into account  
  NULL partition keys in the case of hash partitioning.  
* Fix a typo in a comment in get_steps_using_prefix_recurse().  
* gen_partprune_steps() failed to detect self-contradiction from  
  strict-qual clauses and an IS NULL clause for the same partition key  
  in some cases, producing incorrect partition-pruning steps, which led  
  to incorrect results of partition pruning, but didn't cause any  
  user-visible problems fortunately, as the self-contradiction is  
  detected later in the query planning.  Update that function to detect  
  the self-contradiction.  
  
Per bug #16500 and #16501 from Kobayashi Hisanori.  Patch by me, initial  
diagnosis for the reported issue and review by Dmitry Dolgov.  
Back-patch to v11, where partition pruning was introduced.  
  
Discussion: https://postgr.es/m/16500-d1613f2a78e1e090%40postgresql.org  
Discussion: https://postgr.es/m/16501-5234a9a0394f6754%40postgresql.org  

M src/backend/partitioning/partprune.c
M src/test/regress/expected/partition_prune.out
M src/test/regress/sql/partition_prune.sql

Fix corner case with 16kB-long decompression in pgcrypto, take 2

commit   : 202fc4ca531eb7cf46711c6790a88543b6f713fc    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Mon, 27 Jul 2020 15:59:03 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Mon, 27 Jul 2020 15:59:03 +0900    

Click here for diff

A compressed stream may end with an empty packet.  In this case  
decompression finishes before reading the empty packet and the  
remaining stream packet causes a failure in reading the following  
data.  This commit makes sure to consume such extra data, avoiding a  
failure when decompression the data.  This corner case was reproducible  
easily with a data length of 16kB, and existed since e94dd6a.  A cheap  
regression test is added to cover this case based on a random,  
incompressible string.  
  
The first attempt of this patch has allowed to find an older failure  
within the compression logic of pgcrypto, fixed by b9b6105.  This  
involved SLES 15 with z390 where a custom flavor of libz gets used.  
Bonus thanks to Mark Wong for providing access to the specific  
environment.  
  
Reported-by: Frank Gagnepain  
Author: Kyotaro Horiguchi, Michael Paquier  
Reviewed-by: Tom Lane  
Discussion: https://postgr.es/m/16476-692ef7b84e5fb893@postgresql.org  
Backpatch-through: 9.5  

M contrib/pgcrypto/expected/pgp-compression.out
M contrib/pgcrypto/pgp-compress.c
M contrib/pgcrypto/sql/pgp-compression.sql

Fix buffer usage stats for nodes above Gather Merge.

commit   : 603c18b7ee2e100f081bb756b54758b38c59f65f    
  
author   : Amit Kapila <akapila@postgresql.org>    
date     : Sat, 25 Jul 2020 10:48:09 +0530    
  
committer: Amit Kapila <akapila@postgresql.org>    
date     : Sat, 25 Jul 2020 10:48:09 +0530    

Click here for diff

Commit 85c9d347 addressed a similar problem for Gather and Gather  
Merge nodes but forgot to account for nodes above parallel nodes.  This  
still works for nodes above Gather node because we shut down the workers  
for Gather node as soon as there are no more tuples.  We can do a similar  
thing for Gather Merge as well but it seems better to account for stats  
during nodes shutdown after completing the execution.  
  
Reported-by: Stéphane Lorek, Jehan-Guillaume de Rorthais  
Author: Jehan-Guillaume de Rorthais <jgdr@dalibo.com>  
Reviewed-by: Amit Kapila  
Backpatch-through: 10, where it was introduced  
Discussion: https://postgr.es/m/20200718160206.584532a2@firost  

M src/backend/executor/execProcnode.c

Fix ancient violation of zlib's API spec.

commit   : 475c69c976620f7653c15b8dae90ba8dccf5345a    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 23 Jul 2020 17:19:37 -0400    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 23 Jul 2020 17:19:37 -0400    

Click here for diff

contrib/pgcrypto mishandled the case where deflate() does not consume  
all of the offered input on the first try.  It reset the next_in pointer  
to the start of the input instead of leaving it alone, causing the wrong  
data to be fed to the next deflate() call.  
  
This has been broken since pgcrypto was committed.  The reason for the  
lack of complaints seems to be that it's fairly hard to get stock zlib  
to not consume all the input, so long as the output buffer is big enough  
(which it normally would be in pgcrypto's usage; AFAICT the input is  
always going to be packetized into packets no larger than ZIP_OUT_BUF).  
However, IBM's zlibNX implementation for AIX evidently will do it  
in some cases.  
  
I did not add a test case for this, because I couldn't find one that  
would fail with stock zlib.  When we put back the test case for  
bug #16476, that will cover the zlibNX situation well enough.  
  
While here, write deflate()'s second argument as Z_NO_FLUSH per its  
API spec, instead of hard-wiring the value zero.  
  
Per buildfarm results and subsequent investigation.  
  
Discussion: https://postgr.es/m/16476-692ef7b84e5fb893@postgresql.org  

M contrib/pgcrypto/pgp-compress.c

doc: Document that ssl_ciphers does not affect TLS 1.3

commit   : 807dbce4b668c92c06b507e44da1c6a177bcbd20    
  
author   : Peter Eisentraut <peter@eisentraut.org>    
date     : Thu, 23 Jul 2020 17:13:00 +0200    
  
committer: Peter Eisentraut <peter@eisentraut.org>    
date     : Thu, 23 Jul 2020 17:13:00 +0200    

Click here for diff

TLS 1.3 uses a different way of specifying ciphers and a different  
OpenSSL API.  PostgreSQL currently does not support setting those  
ciphers.  For now, just document this.  In the future, support for  
this might be added somehow.  
  
Reviewed-by: Jonathan S. Katz <jkatz@postgresql.org>  
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>  

M doc/src/sgml/config.sgml

Fix error message.

commit   : 028f0c3a86d003ecaab05ff9df2386f806a3ddf3    
  
author   : Thomas Munro <tmunro@postgresql.org>    
date     : Thu, 23 Jul 2020 21:10:49 +1200    
  
committer: Thomas Munro <tmunro@postgresql.org>    
date     : Thu, 23 Jul 2020 21:10:49 +1200    

Click here for diff

Remove extra space.  Back-patch to all releases, like commit 7897e3bb.  
  
Author: Lu, Chenyang <lucy.fnst@cn.fujitsu.com>  
Discussion: https://postgr.es/m/795d03c6129844d3803e7eea48f5af0d%40G08CNEXMBPEKD04.g08.fujitsu.local  

M src/backend/storage/file/buffile.c

Revert "Fix corner case with PGP decompression in pgcrypto"

commit   : 6ae2d925b131962cfb6a94294adae0eb77f77a16    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Thu, 23 Jul 2020 08:29:22 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Thu, 23 Jul 2020 08:29:22 +0900    

Click here for diff

This reverts commit 9e10898, after finding out that buildfarm members  
running SLES 15 on z390 complain on the compression and decompression  
logic of the new test: pipistrelles, barbthroat and steamerduck.  
  
Those hosts are visibly using hardware-specific changes to improve zlib  
performance, requiring more investigation.  
  
Thanks to Tom Lane for the discussion.  
  
Discussion: https://postgr.es/m/20200722093749.GA2564@paquier.xyz  
Backpatch-through: 9.5  

M contrib/pgcrypto/expected/pgp-compression.out
M contrib/pgcrypto/pgp-compress.c
M contrib/pgcrypto/sql/pgp-compression.sql

Fix corner case with PGP decompression in pgcrypto

commit   : eceb415c6ff0eb2494f90397433a966a182f3908    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Wed, 22 Jul 2020 14:52:50 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Wed, 22 Jul 2020 14:52:50 +0900    

Click here for diff

A compressed stream may end with an empty packet, and PGP decompression  
finished before reading this empty packet in the remaining stream.  This  
caused a failure in pgcrypto, handling this case as corrupted data.  
This commit makes sure to consume such extra data, avoiding a failure  
when decompression the entire stream.  This corner case was reproducible  
with a data length of 16kB, and existed since its introduction in  
e94dd6a.  A cheap regression test is added to cover this case.  
  
Thanks to Jeff Janes for the extra investigation.  
  
Reported-by: Frank Gagnepain  
Author: Kyotaro Horiguchi, Michael Paquier  
Discussion: https://postgr.es/m/16476-692ef7b84e5fb893@postgresql.org  
Backpatch-through: 9.5  

M contrib/pgcrypto/expected/pgp-compression.out
M contrib/pgcrypto/pgp-compress.c
M contrib/pgcrypto/sql/pgp-compression.sql

Avoid C99-ism in pre-v12 branches.

commit   : 22b96f883fe2a454476b4d5fd69ee46b15889169    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 21 Jul 2020 13:13:15 -0400    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 21 Jul 2020 13:13:15 -0400    

Click here for diff

Per buildfarm (I need to figure out why my own compiler did not  
whine about this).  

M src/backend/catalog/indexing.c

Assert that we don't insert nulls into attnotnull catalog columns.

commit   : f451029db85acc9dd9856715e5490ade59fda229    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 21 Jul 2020 12:38:08 -0400    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 21 Jul 2020 12:38:08 -0400    

Click here for diff

The executor checks for this error, and so does the bootstrap catalog  
loader, but we never checked for it in retail catalog manipulations.  
The folly of that has now been exposed, so let's add assertions  
checking it.  Checking in CatalogTupleInsert[WithInfo] and  
CatalogTupleUpdate[WithInfo] should be enough to cover this.  
  
Back-patch to v10; the aforesaid functions didn't exist before that,  
and it didn't seem worth adapting the patch to the oldest branches.  
But given the risk of JIT crashes, I think we certainly need this  
as far back as v11.  
  
Pre-v13, we have to explicitly exclude pg_subscription.subslotname  
and pg_subscription_rel.srsublsn from the checks, since they are  
mismarked.  (Even if we change our mind about applying BKI_FORCE_NULL  
in the branch tips, it doesn't seem wise to have assertions that  
would fire in existing databases.)  
  
Discussion: https://postgr.es/m/298837.1595196283@sss.pgh.pa.us  

M doc/src/sgml/bki.sgml
M src/backend/catalog/indexing.c

Avoid direct C access to possibly-null pg_subscription_rel.srsublsn.

commit   : 99b0c5da3e10a9f64ed2790ed34d8de3075edb20    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 21 Jul 2020 11:40:47 -0400    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 21 Jul 2020 11:40:47 -0400    

Click here for diff

This coding technique is unsafe, since we'd be accessing off the end  
of the tuple if the field is null.  SIGSEGV is pretty improbable, but  
perhaps not impossible.  Also, returning garbage for the LSN doesn't  
seem like a great idea, even if callers aren't looking at it today.  
  
Also update docs to point out explicitly that  
pg_subscription.subslotname and pg_subscription_rel.srsublsn  
can be null.  
  
Perhaps we should mark these two fields BKI_FORCE_NULL, so that  
they'd be correctly labeled in databases that are initdb'd in the  
future.  But we can't force that for existing databases, and on  
balance it's not too clear that having a mix of different catalog  
contents in the field would be wise.  
  
Apply to v10 (where this code came in) through v12.  Already  
fixed in v13 and HEAD.  
  
Discussion: https://postgr.es/m/732838.1595278439@sss.pgh.pa.us  

M doc/src/sgml/catalogs.sgml
M src/backend/catalog/pg_subscription.c
M src/include/catalog/pg_subscription_rel.h

Kluge slot_compile_deform() to ignore incorrect attnotnull markings.

commit   : 855195a7ba9875648f958c42aba91ad382e82edd    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 20 Jul 2020 15:54:24 -0400    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 20 Jul 2020 15:54:24 -0400    

Click here for diff

Since we mustn't force an initdb in released branches, there is no  
simple way to correct the markings of pg_subscription.subslotname  
and pg_subscription_rel.srsublsn as attnotnull in existing pre-v13  
installations.  
  
Fortunately, released branches don't rely on attnotnull being correct  
for much.  The planner looks at it in relation_excluded_by_constraints,  
but it'd be difficult to get that to matter for a query on a system  
catalog.  The only place where it's really problematic is in JIT's  
slot_compile_deform(), which can produce incorrect code that crashes  
if there are NULLs in an allegedly not-null column.  
  
Hence, hack up slot_compile_deform() to be specifically aware of  
these two incorrect markings and not trust them.  
  
This applies to v11 and v12; the JIT code didn't exist before that,  
and we've fixed the markings in v13.  
  
Discussion: https://postgr.es/m/229396.1595191345@sss.pgh.pa.us  

M src/backend/jit/llvm/llvmjit_deform.c
M src/test/regress/expected/subscription.out
M src/test/regress/sql/subscription.sql

Fix construction of updated-columns bitmap in logical replication.

commit   : e8de627a3e05e201ffb78ad7792d14fd25c857c8    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 20 Jul 2020 13:40:16 -0400    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 20 Jul 2020 13:40:16 -0400    

Click here for diff

Commit b9c130a1f failed to apply the publisher-to-subscriber column  
mapping while checking which columns were updated.  Perhaps less  
significantly, it didn't exclude dropped columns either.  This could  
result in an incorrect updated-columns bitmap and thus wrong decisions  
about whether to fire column-specific triggers on the subscriber while  
applying updates.  In HEAD (since commit 9de77b545), it could also  
result in accesses off the end of the colstatus array, as detected by  
buildfarm member skink.  Fix the logic, and adjust 003_constraints.pl  
so that the problem is exposed in unpatched code.  
  
In HEAD, also add some assertions to check that we don't access off  
the ends of these newly variable-sized arrays.  
  
Back-patch to v10, as b9c130a1f was.  
  
Discussion: https://postgr.es/m/CAH2-Wz=79hKQ4++c5A060RYbjTHgiYTHz=fw6mptCtgghH2gJA@mail.gmail.com  

M src/backend/replication/logical/worker.c
M src/test/subscription/t/003_constraints.pl

doc: Refresh more URLs in the docs

commit   : dcd6718017943ad5bfbba7c3474992fa5a89d242    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Sat, 18 Jul 2020 22:43:49 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Sat, 18 Jul 2020 22:43:49 +0900    

Click here for diff

This updates some URLs that are redirections, mostly to an equivalent  
using https.  One URL referring to generalized partial indexes was  
outdated.  
  
Author: Kyotaro Horiguchi  
Discussion: https://postgr.es/m/20200717.121308.1369606287593685396.horikyota.ntt@gmail.com  
Backpatch-through: 9.5  

M doc/src/sgml/acronyms.sgml
M doc/src/sgml/biblio.sgml
M doc/src/sgml/config.sgml
M doc/src/sgml/cube.sgml
M doc/src/sgml/dfunc.sgml
M doc/src/sgml/earthdistance.sgml
M doc/src/sgml/external-projects.sgml
M doc/src/sgml/geqo.sgml
M doc/src/sgml/install-windows.sgml
M doc/src/sgml/intro.sgml
M doc/src/sgml/isn.sgml
M doc/src/sgml/monitoring.sgml
M doc/src/sgml/nls.sgml
M doc/src/sgml/pgcrypto.sgml
M doc/src/sgml/plperl.sgml
M doc/src/sgml/pltcl.sgml
M doc/src/sgml/seg.sgml
M doc/src/sgml/textsearch.sgml

Ensure that distributed timezone abbreviation files are plain ASCII.

commit   : 85c4297a79b1ddeb297f4c03bd901db63cbd70ab    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 17 Jul 2020 11:03:55 -0400    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 17 Jul 2020 11:03:55 -0400    

Click here for diff

We had two occurrences of "Mitteleuropäische Zeit" in Europe.txt,  
though the corresponding entries in Default were spelled  
"Mitteleuropaeische Zeit".  Standardize on the latter spelling to  
avoid questions of which encoding to use.  
  
While here, correct a couple of other trivial inconsistencies between  
the Default file and the supposedly-matching entries in the *.txt  
files, as exposed by some checking with comm(1).  Also, add BDST to  
the Europe.txt file; it previously was only listed in Default.  
None of this has any direct functional effect.  
  
Per complaint from Christoph Berg.  As usual for timezone data patches,  
apply to all branches.  
  
Discussion: https://postgr.es/m/20200716100743.GE3534683@msg.df7cb.de  

M src/timezone/tznames/Antarctica.txt
M src/timezone/tznames/Australia.txt
M src/timezone/tznames/Default
M src/timezone/tznames/Europe.txt

Fix whitespace

commit   : 5ca744cd5c46ae35ff59d6be865cd80f3a366b94    
  
author   : Peter Eisentraut <peter@eisentraut.org>    
date     : Fri, 17 Jul 2020 15:16:13 +0200    
  
committer: Peter Eisentraut <peter@eisentraut.org>    
date     : Fri, 17 Jul 2020 15:16:13 +0200    

Click here for diff

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

Switch pg_test_fsync to use binary mode on Windows

commit   : de559c2b06426e409bf7acf1c0d44a5f7d4550c3    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Thu, 16 Jul 2020 15:53:01 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Thu, 16 Jul 2020 15:53:01 +0900    

Click here for diff

pg_test_fsync has always opened files using the text mode on Windows, as  
this is the default mode used if not enforced by _setmode().  
  
This fixes a failure when running pg_test_fsync down to 12 because  
O_DSYNC and the text mode are not able to work together nicely.  We  
fixed the handling of O_DSYNC in 12~ for the tool by switching to the  
concurrent-safe version of fopen() in src/port/ with 0ba06e0.  And  
40cfe86, by enforcing the text mode for compatibility reasons if O_TEXT  
or O_BINARY are not specified by the caller, broke pg_test_fsync.  For  
all versions, this avoids any translation overhead, and pg_test_fsync  
should test binary writes, so it is a gain in all cases.  
  
Note that O_DSYNC is still not handled correctly in ~11, leading to  
pg_test_fsync to show insanely high numbers for open_datasync() (using  
this property it is easy to notice that the binary mode is much  
faster).  This would require a backpatch of 0ba06e0 and 40cfe86, which  
could potentially break existing applications, so this is left out.  
  
There are no TAP tests for this tool yet, so I have checked all builds  
manually using MSVC.  We could invent a new option to run a single  
transaction instead of using a duration of 1s to make the tests a  
maximum short, but this is left as future work.  
  
Thanks to Bruce Momjian for the discussion.  
  
Reported-by: Jeff Janes  
Author: Michael Paquier  
Discussion: https://postgr.es/m/16526-279ded30a230d275@postgresql.org  
Backpatch-through: 9.5  

M src/bin/pg_test_fsync/pg_test_fsync.c

Replace use of sys_siglist[] with strsignal().

commit   : c6d43ffab3c0b25f1d745a3c920ec515e7c9d935    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 15 Jul 2020 22:05:12 -0400    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 15 Jul 2020 22:05:12 -0400    

Click here for diff

This commit back-patches the v12-era commits a73d08319, cc92cca43,  
and 7570df0f3 into supported pre-v12 branches.  The net effect is to  
eliminate our former dependency on the never-standard sys_siglist[]  
array, instead using POSIX-standard strsignal(3).  
  
What motivates doing this now is that glibc just removed sys_siglist[]  
from the set of symbols available to newly-built programs.  While our  
code can survive without sys_siglist[], it then fails to print any  
description of the signal that killed a child process, which is a  
non-negligible loss of friendliness.  We can expect that people will  
be wanting to build the back branches on platforms that include this  
change, so we need to do something.  
  
Since strsignal(3) has existed for quite a long time, and we've not  
had any trouble with these patches so far in v12, it seems safe to  
back-patch into older branches.  
  
Discussion: https://postgr.es/m/3179114.1594853308@sss.pgh.pa.us  

M configure
M configure.in
M src/backend/postmaster/pgarch.c
M src/backend/postmaster/postmaster.c
M src/bin/pg_basebackup/pg_basebackup.c
M src/common/wait_error.c
M src/include/pg_config.h.in
M src/include/pg_config.h.win32
M src/include/port.h
M src/port/Makefile
A src/port/pgstrsignal.c
M src/test/regress/pg_regress.c

Fix handling of missing files when using pg_rewind with online source

commit   : c6d33d14408664ccd1ebcd2f4e7dddd54cfe698e    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Wed, 15 Jul 2020 15:17:44 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Wed, 15 Jul 2020 15:17:44 +0900    

Click here for diff

When working with an online source cluster, pg_rewind gets a list of all  
the files in the source data directory using a WITH RECURSIVE query,  
returning a NULL result for a file's metadata if it gets removed between  
the moment it is listed in a directory and the moment its metadata is  
obtained with pg_stat_file() (say a recycled WAL segment).  The query  
result was processed in such a way that for each tuple we checked only  
that the first file's metadata was NULL.  This could have two  
consequences, both resulting in a failure of the rewind:  
- If the first tuple referred to a removed file, all files from the  
source would be ignored.  
- Any file actually missing would not be considered as such.  
  
While on it, rework slightly the code so as no values are saved if we  
know that a file is going to be skipped.  
  
Issue introduced by b36805f, so backpatch down to 9.5.  
  
Author: Justin Pryzby, Michael Paquier  
Reviewed-by: Daniel Gustafsson, Masahiko Sawada  
Discussion: https://postgr.es/m/20200713061010.GC23581@telsasoft.com  
Backpatch-through: 9.5  

M src/bin/pg_rewind/libpq_fetch.c

Fix bitmap AND/OR scans on the inside of a nestloop partition-wise join.

commit   : e9f031172c6bc76978bf6708628010b65d1e9d99    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 14 Jul 2020 18:56:49 -0400    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 14 Jul 2020 18:56:49 -0400    

Click here for diff

reparameterize_path_by_child() failed to reparameterize BitmapAnd  
and BitmapOr paths.  This matters only if such a path is chosen as  
the inside of a nestloop partition-wise join, where we have to pass  
in parameters from the outside of the nestloop.  If that did happen,  
we generated a bad plan that would likely lead to crashes at execution.  
  
This is not entirely reparameterize_path_by_child()'s fault though;  
it's the victim of an ancient decision (my ancient decision, I think)  
to not bother filling in param_info in BitmapAnd/Or path nodes.  That  
caused the function to believe that such nodes and their children  
contain no parameter references and so need not be processed.  
  
In hindsight that decision looks pretty penny-wise and pound-foolish:  
while it saves a few cycles during path node setup, we do commonly  
need the information later.  In particular, by reversing the decision  
and requiring valid param_info data in all nodes of a bitmap path  
tree, we can get rid of indxpath.c's get_bitmap_tree_required_outer()  
function, which computed the data on-demand.  It's not unlikely that  
that nets out as a savings of cycles in many scenarios.  A couple  
of other things in indxpath.c can be simplified as well.  
  
While here, get rid of some cases in reparameterize_path_by_child()  
that are visibly dead or useless, given that we only care about  
reparameterizing paths that can be on the inside of a parameterized  
nestloop.  This case reminds one of the maxim that untested code  
probably does not work, so I'm unwilling to leave unreachable code  
in this function.  (I did leave the T_Gather case in place even  
though it's not reached in the regression tests.  It's not very  
clear to me when the planner might prefer to put Gather below  
rather than above a nestloop, but at least in principle the case  
might be interesting.)  
  
Per bug #16536, originally from Arne Roland but with a test case  
by Andrew Gierth.  Back-patch to v11 where this code came in.  
  
Discussion: https://postgr.es/m/16536-2213ee0b3aad41fd@postgresql.org  

M src/backend/optimizer/path/indxpath.c
M src/backend/optimizer/util/pathnode.c
M src/test/regress/expected/partition_join.out
M src/test/regress/sql/partition_join.sql

Fix timing issue with ALTER TABLE's validate constraint

commit   : d2761b680a9052b9d62912cfcc36c154f28517ce    
  
author   : David Rowley <drowley@postgresql.org>    
date     : Tue, 14 Jul 2020 16:59:57 +1200    
  
committer: David Rowley <drowley@postgresql.org>    
date     : Tue, 14 Jul 2020 16:59:57 +1200    

Click here for diff

An ALTER TABLE to validate a foreign key in which another subcommand  
already caused a pending table rewrite could fail due to ALTER TABLE  
attempting to validate the foreign key before the actual table rewrite  
takes place.  This situation could result in an error such as:  
  
ERROR:  could not read block 0 in file "base/nnnnn/nnnnn": read only 0 of 8192 bytes  
  
The failure here was due to the SPI call which validates the foreign key  
trying to access an index which is yet to be rebuilt.  
  
Similarly, we also incorrectly tried to validate CHECK constraints before  
the heap had been rewritten.  
  
The fix for both is to delay constraint validation until phase 3, after  
the table has been rewritten.  For CHECK constraints this means a slight  
behavioral change.  Previously ALTER TABLE VALIDATE CONSTRAINT on  
inheritance tables would be validated from the bottom up.  This was  
different from the order of evaluation when a new CHECK constraint was  
added.  The changes made here aligns the VALIDATE CONSTRAINT evaluation  
order for inheritance tables to be the same as ADD CONSTRAINT, which is  
generally top-down.  
  
Reported-by: Nazli Ugur Koyluoglu, using SQLancer  
Discussion: https://postgr.es/m/CAApHDvp%3DZXv8wiRyk_0rWr00skhGkt8vXDrHJYXRMft3TjkxCA%40mail.gmail.com  
Backpatch-through: 9.5 (all supported versions)  

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

Cope with lateral references in the quals of a subquery RTE.

commit   : 3753df8f8ae8e16bf81bc809514982b35a94f4a1    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 13 Jul 2020 20:38:21 -0400    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 13 Jul 2020 20:38:21 -0400    

Click here for diff

The qual pushdown logic assumed that all Vars in a restriction clause  
must be Vars referencing subquery outputs; but since we introduced  
LATERAL, it's possible for such a Var to be a lateral reference instead.  
This led to an assertion failure in debug builds.  In a non-debug  
build, there might be no ill effects (if qual_is_pushdown_safe decided  
the qual was unsafe anyway), or we could get failures later due to  
construction of an invalid plan.  I've not gone to much length to  
characterize the possible failures, but at least segfaults in the  
executor have been observed.  
  
Given that this has been busted since 9.3 and it took this long for  
anybody to notice, I judge that the case isn't worth going to great  
lengths to optimize.  Hence, fix by just teaching qual_is_pushdown_safe  
that such quals are unsafe to push down, matching the previous behavior  
when it accidentally didn't fail.  
  
Per report from Tom Ellis.  Back-patch to all supported branches.  
  
Discussion: https://postgr.es/m/20200713175124.GQ8220@cloudinit-builder  

M src/backend/optimizer/path/allpaths.c
M src/test/regress/expected/subselect.out
M src/test/regress/sql/subselect.sql

Avoid trying to restore table ACLs and per-column ACLs in parallel.

commit   : 4fdc559c88eb53ba12fc4c59a633d2bee0dbf8a2    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sat, 11 Jul 2020 13:36:50 -0400    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sat, 11 Jul 2020 13:36:50 -0400    

Click here for diff

Parallel pg_restore has always supposed that ACL items for different  
objects are independent and can be restored in parallel without  
conflicts.  However, there is one case where this fails: because  
REVOKE on a table is defined to also revoke the privilege(s) at  
column level, we can't restore per-column ACLs till after we restore  
any table-level privileges on their table.  Failure to honor this  
restriction can lead to "tuple concurrently updated" errors during  
parallel restore, or even to the per-column ACLs silently disappearing  
because the table-level REVOKE is executed afterwards.  
  
To fix, add a dependency from each column-level ACL item to its table's  
ACL item, if there is one.  Note that this doesn't fix the hazard  
for pre-existing archive files, only for ones made with a corrected  
pg_dump.  Given that the bug's been there quite awhile without  
field reports, I think this is acceptable.  
  
This requires changing the API of pg_dump's dumpACL() function.  
To keep its argument list from getting even longer, I removed the  
"CatalogId objCatId" argument, which has been unused for ages.  
  
Per report from Justin Pryzby.  Back-patch to all supported branches.  
  
Discussion: https://postgr.es/m/20200706050129.GW4107@telsasoft.com  

M src/bin/pg_dump/common.c
M src/bin/pg_dump/pg_backup.h
M src/bin/pg_dump/pg_dump.c

Doc: update or remove dead external links.

commit   : 0ecd36ee0e49250048f038c81fbc12b4102caa7e    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 10 Jul 2020 13:16:00 -0400    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 10 Jul 2020 13:16:00 -0400    

Click here for diff

Re-point comp.ai.genetic FAQ link to a more stable address.  
  
Remove stale links to AIX documentation; we don't really need to  
tell AIX users how to use their systems.  
  
Remove stale links to HP documentation about SSL.  We've had to  
update those twice before, making it increasingly obvious that  
HP does not intend them to be stable landing points.  They're  
not particularly authoritative, either.  (This change effectively  
reverts bbd3bdba3.)  
  
Daniel Gustafsson and Álvaro Herrera, per a gripe from  
Kyotaro Horiguchi.  Back-patch, since these links are  
just as dead in the back branches.  
  
Discussion: https://postgr.es/m/20200709.161226.204639179120026914.horikyota.ntt@gmail.com  

M doc/src/sgml/geqo.sgml
M doc/src/sgml/installation.sgml
M doc/src/sgml/libpq.sgml
M doc/src/sgml/runtime.sgml

Remove WARNING message from brin_desummarize_range

commit   : 907283576da53ab654f2124cec5242524e8920b1    
  
author   : Alvaro Herrera <alvherre@alvh.no-ip.org>    
date     : Thu, 9 Jul 2020 20:13:25 -0400    
  
committer: Alvaro Herrera <alvherre@alvh.no-ip.org>    
date     : Thu, 9 Jul 2020 20:13:25 -0400    

Click here for diff

This message was being emitted on the grounds that only crashed  
summarization could cause it, but in reality even an aborted vacuum  
could do it ... which makes it way too noisy, particularly since it  
shows up in regression tests and makes them die.  
  
Reported by Tom Lane.  
Discussion: https://postgr.es/m/489091.1593534251@sss.pgh.pa.us  

M src/backend/access/brin/brin_revmap.c

Tighten up Windows CRLF conversion in our TAP test scripts.

commit   : 89162b7364bf7831cde458a9a298c060256dc59a    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 9 Jul 2020 17:38:52 -0400    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 9 Jul 2020 17:38:52 -0400    

Click here for diff

Back-patch commits 91bdf499b and ffb4cee43, so that all branches  
agree on when and how to do Windows CRLF conversion.  
  
This should close the referenced thread.  Thanks to Andrew Dunstan  
for discussion/review.  
  
Discussion: https://postgr.es/m/412ae8da-76bb-640f-039a-f3513499e53d@gmx.net  

M src/bin/pg_rewind/t/RewindTest.pm
M src/test/perl/PostgresNode.pm
M src/test/perl/TestLib.pm

Fix pg_current_logfile() to not emit a carriage return on Windows.

commit   : 90b418f81645f6a3a4162dad7628481a5d1a7415    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 9 Jul 2020 16:02:23 -0400    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 9 Jul 2020 16:02:23 -0400    

Click here for diff

Due to not having our signals straight about CRLF vs. LF line  
termination, the output of pg_current_logfile() included a trailing  
\r on Windows.  To fix, force the file descriptor it uses into text  
mode.  
  
While here, move a couple of local variable declarations to make  
the function's logic clearer.  
  
In v12 and v13, also back-patch the test added by 1c4e88e2f so that  
this function has some test coverage.  However, the 004_logrotate.pl  
test script doesn't exist before v12, and it didn't seem worth adding  
to older branches just for this.  
  
Per report from Thomas Kellerer.  Back-patch to v10 where this  
function was added.  
  
Discussion: https://postgr.es/m/412ae8da-76bb-640f-039a-f3513499e53d@gmx.net  

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

doc: Correct the description about the length of pg_stat_activity.query.

commit   : 08952572a7d6197393051f881a880be4223c7291    
  
author   : Fujii Masao <fujii@postgresql.org>    
date     : Thu, 9 Jul 2020 13:31:33 +0900    
  
committer: Fujii Masao <fujii@postgresql.org>    
date     : Thu, 9 Jul 2020 13:31:33 +0900    

Click here for diff

pg_stat_activity.query text is truncated at 1024 bytes. But previously  
the document described that it's truncated at 1024 characters.  
This was not accurate when considering multibyte characters.  
  
Back-patch to v10 where this inaccurate description was added.  
  
Author: Atsushi Torikoshi  
Reviewed-by: Daniel Gustafsson, Fujii Masao  
Discussion: https://postgr.es/m/cd5b49a5a14e887542f5f569c1c6bde2@oss.nttdata.com  

M doc/src/sgml/monitoring.sgml

doc: Fix incorrect reference to textout in plpgsql examples

commit   : d51155544befc48cacfda3ad28ba64bdee3161e8    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Sun, 5 Jul 2020 19:36:22 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Sun, 5 Jul 2020 19:36:22 +0900    

Click here for diff

This error has survived for 22 years, and has been introduced by  
da63386.  
  
Reported-by: Erwin Brandstetter  
Discussion: https://postgr.es/m/CAGHENJ57wogGOvGXo5LgWYcqswxafLck8ELqHDR+zrkTPgs_OQ@mail.gmail.com  
Backpatch-through: 9.5  

M doc/src/sgml/plpgsql.sgml

Fix "ignoring return value" complaints from commit 96d1f423f9

commit   : 1243aa9b2f2e8a23f5fbace2b038b962bf79e9f0    
  
author   : Joe Conway <mail@joeconway.com>    
date     : Sat, 4 Jul 2020 13:47:31 -0400    
  
committer: Joe Conway <mail@joeconway.com>    
date     : Sat, 4 Jul 2020 13:47:31 -0400    

Click here for diff

The cfbot and some BF animals are complaining about the previous  
read_binary_file commit because of ignoring return value of ‘fread’.  
So let's make everyone happy by testing the return value even though  
not strictly needed.  
  
Reported by Justin Pryzby, and suggested patch by Tom Lane. Backpatched  
to v11 same as the previous commit.  
  
Reported-By: Justin Pryzby  
Reviewed-By: Tom Lane  
Discussion: https://postgr.es/m/flat/969b8d82-5bb2-5fa8-4eb1-f0e685c5d736%40joeconway.com  
Backpatch-through: 11  

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

Read until EOF vice stat-reported size in read_binary_file

commit   : c2cdaf0cb912fa24ac56170c7c47a2fc398e2516    
  
author   : Joe Conway <mail@joeconway.com>    
date     : Sat, 4 Jul 2020 06:29:03 -0400    
  
committer: Joe Conway <mail@joeconway.com>    
date     : Sat, 4 Jul 2020 06:29:03 -0400    

Click here for diff

read_binary_file(), used by SQL functions pg_read_file() and friends,  
uses stat to determine file length to read, when not passed an explicit  
length as an argument. This is problematic, for example, if the file  
being read is a virtual file with a stat-reported length of zero.  
Arrange to read until EOF, or StringInfo data string lenth limit, is  
reached instead.  
  
Original complaint and patch by me, with significant review, corrections,  
advice, and code optimizations by Tom Lane. Backpatched to v11. Prior to  
that only paths relative to the data and log dirs were allowed for files,  
so no "zero length" files were reachable anyway.  
  
Reviewed-By: Tom Lane  
Discussion: https://postgr.es/m/flat/969b8d82-5bb2-5fa8-4eb1-f0e685c5d736%40joeconway.com  
Backpatch-through: 11  

M contrib/adminpack/expected/adminpack.out
M src/backend/utils/adt/genfile.c

Clamp total-tuples estimates for foreign tables to ensure planner sanity.

commit   : ef799bdd04ee7f5d5c5fb2547633ef98c4949cfb    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 3 Jul 2020 19:01:21 -0400    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 3 Jul 2020 19:01:21 -0400    

Click here for diff

After running GetForeignRelSize for a foreign table, adjust rel->tuples  
to be at least as large as rel->rows.  This prevents bizarre behavior  
in estimate_num_groups() and perhaps other places, especially in the  
scenario where rel->tuples is zero because pg_class.reltuples is  
(suggesting that ANALYZE has never been run for the table).  As things  
stood, we'd end up estimating one group out of any GROUP BY on such a  
table, whereas the default group-count estimate is more likely to result  
in a sane plan.  
  
Also, clarify in the documentation that GetForeignRelSize has the option  
to override the rel->tuples value if it has a better idea of what to use  
than what is in pg_class.reltuples.  
  
Per report from Jeff Janes.  Back-patch to all supported branches.  
  
Patch by me; thanks to Etsuro Fujita for review  
  
Discussion: https://postgr.es/m/CAMkU=1xNo9cnan+Npxgz0eK7394xmjmKg-QEm8wYG9P5-CcaqQ@mail.gmail.com  

M doc/src/sgml/fdwhandler.sgml
M src/backend/optimizer/path/allpaths.c

Fix temporary tablespaces for shared filesets some more.

commit   : 79ed1d99d7ce4827c566c5b2bc1cf1528e8add36    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 3 Jul 2020 17:01:34 -0400    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 3 Jul 2020 17:01:34 -0400    

Click here for diff

Commit ecd9e9f0b fixed the problem in the wrong place, causing unwanted  
side-effects on the behavior of GetNextTempTableSpace().  Instead,  
let's make SharedFileSetInit() responsible for subbing in the value  
of MyDatabaseTableSpace when the default tablespace is called for.  
  
The convention about what is in the tempTableSpaces[] array is  
evidently insufficiently documented, so try to improve that.  
  
It also looks like SharedFileSetInit() is doing the wrong thing in the  
case where temp_tablespaces is empty.  It was hard-wiring use of the  
pg_default tablespace, but it seems like using MyDatabaseTableSpace  
is more consistent with what happens for other temp files.  
  
Back-patch the reversion of PrepareTempTablespaces()'s behavior to  
9.5, as ecd9e9f0b was.  The changes in SharedFileSetInit() go back  
to v11 where that was introduced.  (Note there is net zero code change  
before v11 from these two patch sets, so nothing to release-note.)  
  
Magnus Hagander and Tom Lane  
  
Discussion: https://postgr.es/m/CABUevExg5YEsOvqMxrjoNvb3ApVyH+9jggWGKwTDFyFCVWczGQ@mail.gmail.com  

M src/backend/commands/tablespace.c
M src/backend/storage/file/fd.c
M src/backend/storage/file/sharedfileset.c

Fix temporary tablespaces for shared filesets

commit   : 4aa02d0729f01e6f381a2ffbf052a0d54dcbdb82    
  
author   : Magnus Hagander <magnus@hagander.net>    
date     : Fri, 3 Jul 2020 15:09:06 +0200    
  
committer: Magnus Hagander <magnus@hagander.net>    
date     : Fri, 3 Jul 2020 15:09:06 +0200    

Click here for diff

A likely copy/paste error in 98e8b480532 from  back in 2004 would  
cause temp tablespace to be reset to InvalidOid if temp_tablespaces  
was set to the same value as the primary tablespace in the database.  
This would cause shared filesets (such as for parallel hash joins)  
to ignore them, putting the temporary files in the default tablespace  
instead of the configured one. The bug is in the old code, but it  
appears to have been exposed only once we had shared filesets.  
  
Reviewed-By: Daniel Gustafsson  
Discussion: https://postgr.es/m/CABUevExg5YEsOvqMxrjoNvb3ApVyH+9jggWGKwTDFyFCVWczGQ@mail.gmail.com  
Backpatch-through: 9.5  

M src/backend/commands/tablespace.c

doc: clarify that storage parameter values are optional

commit   : 81b244e78b637b16ddb7a33bc5fb7448b6c45c39    
  
author   : Bruce Momjian <bruce@momjian.us>    
date     : Tue, 30 Jun 2020 12:26:51 -0400    
  
committer: Bruce Momjian <bruce@momjian.us>    
date     : Tue, 30 Jun 2020 12:26:51 -0400    

Click here for diff

In a few cases, the documented syntax specified storage parameter values  
as required.  
  
Reported-by: galiev_mr@taximaxim.ru  
  
Discussion: https://postgr.es/m/159283163235.684.4482737698910467437@wrigleys.postgresql.org  
  
Backpatch-through: 9.5  

M doc/src/sgml/ref/alter_index.sgml
M doc/src/sgml/ref/alter_materialized_view.sgml
M doc/src/sgml/ref/alter_table.sgml
M doc/src/sgml/ref/create_index.sgml

doc: change pg_upgrade wal_level to be not minimal

commit   : 457942e18853f168f03c4bae4b4c0dce494f68e2    
  
author   : Bruce Momjian <bruce@momjian.us>    
date     : Tue, 30 Jun 2020 11:55:53 -0400    
  
committer: Bruce Momjian <bruce@momjian.us>    
date     : Tue, 30 Jun 2020 11:55:53 -0400    

Click here for diff

Previously it was specified to be only replica.  
  
Discussion: https://postgr.es/m/20200618180058.GK7349@momjian.us  
  
Backpatch-through: 9.5  

M doc/src/sgml/ref/pgupgrade.sgml

Fix documentation of "must be vacuumed within" warning.

commit   : b2bf22c1e58958527b7ec88aa071425c1e68e578    
  
author   : Noah Misch <noah@leadboat.com>    
date     : Sat, 27 Jun 2020 22:05:04 -0700    
  
committer: Noah Misch <noah@leadboat.com>    
date     : Sat, 27 Jun 2020 22:05:04 -0700    

Click here for diff

Warnings start 10M transactions before xidStopLimit, which is 11M  
transactions before wraparound.  The sample WARNING output showed a  
value greater than 11M, and its HINT message predated commit  
25ec228ef760eb91c094cc3b6dea7257cc22ffb5.  Hence, the sample was  
impossible.  Back-patch to 9.5 (all supported versions).  

M doc/src/sgml/maintenance.sgml

doc: mention trigger helper functions in CREATE TRIGGER docs

commit   : 4a12bfe21af8837fb9f1623831efc56ab65c4e73    
  
author   : Bruce Momjian <bruce@momjian.us>    
date     : Thu, 25 Jun 2020 18:33:28 -0400    
  
committer: Bruce Momjian <bruce@momjian.us>    
date     : Thu, 25 Jun 2020 18:33:28 -0400    

Click here for diff

Reported-by: petermpallesen@gmail.com  
  
Discussion: https://postgr.es/m/159195294959.673.5752624528747900508@wrigleys.postgresql.org  
  
Backpatch-through: 9.5  

M doc/src/sgml/ref/create_trigger.sgml

docs: clarify that CREATE DATABASE does not copy db permissions

commit   : bf4f195925c904a442fad10f3ff7bad4438a8cf5    
  
author   : Bruce Momjian <bruce@momjian.us>    
date     : Thu, 25 Jun 2020 18:22:44 -0400    
  
committer: Bruce Momjian <bruce@momjian.us>    
date     : Thu, 25 Jun 2020 18:22:44 -0400    

Click here for diff

That is, those database permissions set by GRANT.  
  
Diagnosed-by: Joseph Nahmias  
  
Discussion: https://postgr.es/m/20200614072613.GA21852@nahmias.net  
  
Backpatch-through: 9.5  

M doc/src/sgml/ref/create_database.sgml

Fix compiler warning induced by commit d8b15eeb8.

commit   : 684325566d3574887082a55a1a1292cbdbef2e1c    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 24 Jun 2020 15:47:30 -0400    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 24 Jun 2020 15:47:30 -0400    

Click here for diff

I forgot that INT64_FORMAT can't be used with sscanf on Windows.  
Use the same trick of sscanf'ing into a temp variable as we do in  
some other places in zic.c.  
  
The upstream IANA code avoids the portability problem by relying on  
<inttypes.h>'s SCNdFAST64 macro.  Once we're requiring C99 in all  
branches, we should do likewise and drop this set of diffs from  
upstream.  For now, though, a hack seems fine, since we do not  
actually care about leapseconds anyway.  
  
Discussion: https://postgr.es/m/4e5d1a5b-143e-e70e-a99d-a3b01c1ae7c3@2ndquadrant.com  

M src/timezone/zic.c

Add parens to ConvertToXSegs macro

commit   : 5c215c941c3f6d6d2f5faf7bef6262373594977c    
  
author   : Alvaro Herrera <alvherre@alvh.no-ip.org>    
date     : Wed, 24 Jun 2020 13:57:21 -0400    
  
committer: Alvaro Herrera <alvherre@alvh.no-ip.org>    
date     : Wed, 24 Jun 2020 13:57:21 -0400    

Click here for diff

The current definition (introduced in 9a3215026bd6) is dangerous.  No  
bugs exist in our code at present, but backpatch to 11 nonetheless,  
where that commit debuted.  
  
Author: Álvaro Herrera <alvherre@alvh.no-ip.org>  

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

Undo double-quoting of index names in non-text EXPLAIN output formats.

commit   : 35a8e227e6c6d566f47436555730fef711691dd6    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 22 Jun 2020 11:46:41 -0400    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 22 Jun 2020 11:46:41 -0400    

Click here for diff

explain_get_index_name() applied quote_identifier() to the index name.  
This is fine for text output, but the non-text output formats all have  
their own quoting conventions and would much rather start from the  
actual index name.  For example in JSON you'd get something like  
  
       "Index Name": "\"My Index\"",  
  
which is surely not desirable, especially when the same does not  
happen for table names.  Hence, move the responsibility for applying  
quoting out to the callers, where it can go into already-existing  
special code paths for text format.  
  
This changes the API spec for users of explain_get_index_name_hook:  
before, they were supposed to apply quote_identifier() if necessary,  
now they should not.  Research suggests that the only publicly  
available user of the hook is hypopg, and it actually forgot to  
apply quoting anyway, so it's fine.  (In any case, there's no  
behavioral change for the output of a hook as seen in non-text  
EXPLAIN formats, so this won't break any case that programs should  
be relying on.)  
  
Digging in the commit logs, it appears that quoting was included in  
explain_get_index_name's duties when commit 604ffd280 invented it;  
and that was fine at the time because we only had text output format.  
This should have been rethought when non-text formats were invented,  
but it wasn't.  
  
This is a fairly clear bug for users of non-text EXPLAIN formats,  
so back-patch to all supported branches.  
  
Per bug #16502 from Maciek Sakrejda.  Patch by me (based on  
investigation by Euler Taveira); thanks to Julien Rouhaud for review.  
  
Discussion: https://postgr.es/m/16502-57bd1c9f913ed1d1@postgresql.org  

M src/backend/commands/explain.c

Fix masking of SP-GiST pages during xlog consistency check

commit   : 3f88e2d78dbe61b8eec8dfb051b9dc0d1ff0052f    
  
author   : Alexander Korotkov <akorotkov@postgresql.org>    
date     : Sat, 20 Jun 2020 17:34:51 +0300    
  
committer: Alexander Korotkov <akorotkov@postgresql.org>    
date     : Sat, 20 Jun 2020 17:34:51 +0300    

Click here for diff

spg_mask() didn't take into account that pd_lower equal to SizeOfPageHeaderData  
is still valid value.  This commit fixes that.  Backpatch to 11, where  
spg_mask() pg_lower check was introduced.  
  
Reported-by: Michael Paquier  
Discussion: https://postgr.es/m/20200615131405.GM52676%40paquier.xyz  
Backpatch-through: 11  

M src/backend/access/spgist/spgxlog.c

Ensure write failure reports no-disk-space

commit   : 2e155d90d1b867f7b5bf9616236386eb1e0f40ff    
  
author   : Alvaro Herrera <alvherre@alvh.no-ip.org>    
date     : Fri, 19 Jun 2020 16:46:07 -0400    
  
committer: Alvaro Herrera <alvherre@alvh.no-ip.org>    
date     : Fri, 19 Jun 2020 16:46:07 -0400    

Click here for diff

A few places calling fwrite and gzwrite were not setting errno to ENOSPC  
when reporting errors, as is customary; this led to some failures being  
reported as  
"could not write file: Success"  
which makes us look silly.  Make a few of these places in pg_dump and  
pg_basebackup use our customary pattern.  
  
Backpatch-to: 9.5  
Author: Justin Pryzby <pryzby@telsasoft.com>  
Author: Tom Lane <tgl@sss.pgh.pa.us>  
Author: Álvaro Herrera <alvherre@alvh.no-ip.org>  
Discussion: https://postgr.es/m/20200611153753.GU14879@telsasoft.com  

M src/bin/pg_basebackup/pg_basebackup.c
M src/bin/pg_dump/pg_backup_directory.c

Future-proof regression tests against possibly-missing posixrules file.

commit   : e7c183cd1fd1a7b2fb7ebbe1084bac836fbefac7    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 19 Jun 2020 13:55:21 -0400    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 19 Jun 2020 13:55:21 -0400    

Click here for diff

The IANA time zone folk have deprecated use of a "posixrules" file in  
the tz database.  While for now it's our choice whether to keep  
supplying one in our own builds, installations built with  
--with-system-tzdata will soon be needing to cope with that file not  
being present, at least on some platforms.  
  
This causes a problem for the horology test, which expected the  
nonstandard POSIX zone spec "CST7CDT" to apply pre-2007 US daylight  
savings rules.  That does happen if the posixrules file supplies such  
information, but otherwise the test produces undesired results.  
To fix, add an explicit transition date rule that matches 2005 practice.  
(We could alternatively have switched the test to use some real time  
zone, but it seems useful to have coverage of this type of zone spec.)  
  
While at it, update a documentation example that also relied on  
"CST7CDT"; use a real-world zone name instead.  Also, document why  
the zone names EST5EDT, CST6CDT, MST7MDT, PST8PDT aren't subject to  
similar failures when "posixrules" is missing.  
  
Back-patch to all supported branches, since the hazard is the same  
for all.  
  
Discussion: https://postgr.es/m/1665379.1592581287@sss.pgh.pa.us  

M doc/src/sgml/datetime.sgml
M doc/src/sgml/func.sgml
M src/test/regress/expected/horology.out
M src/test/regress/sql/horology.sql

Fix C99isms introduced when backpatching atomics / spinlock tests.

commit   : e6ba7056b499a566af7c792794a5c6f51620c866    
  
author   : Andres Freund <andres@anarazel.de>    
date     : Thu, 18 Jun 2020 15:12:09 -0700    
  
committer: Andres Freund <andres@anarazel.de>    
date     : Thu, 18 Jun 2020 15:12:09 -0700    

Click here for diff

M src/test/regress/regress.c

Fix deadlock danger when atomic ops are done under spinlock.

commit   : 825d89dda5add2eecdc26fa36365720b22c72b71    
  
author   : Andres Freund <andres@anarazel.de>    
date     : Mon, 8 Jun 2020 16:50:37 -0700    
  
committer: Andres Freund <andres@anarazel.de>    
date     : Mon, 8 Jun 2020 16:50:37 -0700    

Click here for diff

This was a danger only for --disable-spinlocks in combination with  
atomic operations unsupported by the current platform.  
  
While atomics.c was careful to signal that a separate semaphore ought  
to be used when spinlock emulation is active, spin.c didn't actually  
implement that mechanism. That's my (Andres') fault, it seems to have  
gotten lost during the development of the atomic operations support.  
  
Fix that issue and add test for nesting atomic operations inside a  
spinlock.  
  
Author: Andres Freund  
Discussion: https://postgr.es/m/20200605023302.g6v3ydozy5txifji@alap3.anarazel.de  
Backpatch: 9.5-  

M src/backend/storage/lmgr/spin.c
M src/test/regress/regress.c

Add basic spinlock tests to regression tests.

commit   : e027219f213111743a51e19e9febface5871af76    
  
author   : Andres Freund <andres@anarazel.de>    
date     : Mon, 8 Jun 2020 16:36:51 -0700    
  
committer: Andres Freund <andres@anarazel.de>    
date     : Mon, 8 Jun 2020 16:36:51 -0700    

Click here for diff

As s_lock_test, the already existing test for spinlocks, isn't run in  
an automated fashion (and doesn't test a normal backend environment),  
adding tests that are run as part of a normal regression run is a good  
idea. Particularly in light of several recent and upcoming spinlock  
related fixes.  
  
Currently the new tests are run as part of the pre-existing  
test_atomic_ops() test. That perhaps can be quibbled about, but for  
now seems ok.  
  
The only operations that s_lock_test tests but the new tests don't are  
the detection of a stuck spinlock and S_LOCK_FREE (which is otherwise  
unused, not implemented on all platforms, and will be removed).  
  
This currently contains a test for more than INT_MAX spinlocks (only  
run with --disable-spinlocks), to ensure the recent commit fixing a  
bug with more than INT_MAX spinlock initializations is correct. That  
test is somewhat slow, so we might want to disable it after a few  
days.  
  
It might be worth retiring s_lock_test after this. The added coverage  
of a stuck spinlock probably isn't worth the added complexity?  
  
Author: Andres Freund  
Discussion: https://postgr.es/m/20200606023103.avzrctgv7476xj7i@alap3.anarazel.de  

M src/test/regress/regress.c

Doc: document POSIX-style time zone specifications in full.

commit   : 070f49005350131a62399b9b29bff61f8adaefff    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 18 Jun 2020 16:27:18 -0400    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 18 Jun 2020 16:27:18 -0400    

Click here for diff

We'd glossed over most of this complexity for years, but it's hard  
to avoid writing it all down now, so that we can explain what happens  
when there's no "posixrules" file in the IANA time zone database.  
That was at best a tiny minority situation till now, but it's likely  
to become quite common in the future, so we'd better explain it.  
  
Nonetheless, we don't really encourage people to use POSIX zone specs;  
picking a named zone is almost always what you really want, unless  
perhaps you're stuck with an out-of-date zone database.  Therefore,  
let's shove all this detail into an appendix.  
  
Patch by me; thanks to Robert Haas for help with some awkward wording.  
  
Discussion: https://postgr.es/m/1390.1562258309@sss.pgh.pa.us  

M doc/src/sgml/datatype.sgml
M doc/src/sgml/datetime.sgml

Fix oldest xmin and LSN computation across repslots after advancing

commit   : 1657e14b50d23cdf8bb9fec0a4e5d9cc0b7b265e    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Thu, 18 Jun 2020 16:35:36 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Thu, 18 Jun 2020 16:35:36 +0900    

Click here for diff

Advancing a replication slot did not recompute the oldest xmin and LSN  
values across replication slots, preventing resource removal like  
segments not recycled at checkpoint time.  The original commit that  
introduced the slot advancing in 9c7d06d never did the update of those  
oldest values, and b0afdca removed this code.  
  
This commit adds a TAP test to check segment recycling with advancing  
for physical slots, enforcing an extra segment switch before advancing  
to check if the segment gets correctly recycled after a checkpoint.  
  
Reported-by: Andres Freund  
Reviewed-by: Alexey Kondratov, Kyptaro Horiguchi  
Discussion: https://postgr.es/m/20200609171904.kpltxxvjzislidks@alap3.anarazel.de  
Backpatch-through: 11  

M src/backend/replication/slotfuncs.c
M src/test/recovery/t/001_stream_rep.pl

Sync our copy of the timezone library with IANA release tzcode2020a.

commit   : 3ced1dd6c479389b4000ae484a12b11e8d77b844    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 17 Jun 2020 18:29:29 -0400    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 17 Jun 2020 18:29:29 -0400    

Click here for diff

This absorbs a leap-second-related bug fix in localtime.c, and  
teaches zic to handle an expiration marker in the leapseconds file.  
Neither are of any interest to us (for the foreseeable future  
anyway), but we need to stay more or less in sync with upstream.  
  
Also adjust some over-eager changes in the README from commit 957338418.  
I have no intention of making changes that require C99 in this code,  
until such time as all the live back branches require C99.  Otherwise  
back-patching will get too exciting.  
  
For the same reason, absorb assorted whitespace and other cosmetic  
changes from HEAD into the back branches; mostly this reflects use of  
improved versions of pgindent.  
  
All in all then, quite a boring update.  But I figured I'd get it  
done while I was looking at this code.  

M src/timezone/README
M src/timezone/localtime.c
M src/timezone/pgtz.c
M src/timezone/pgtz.h
M src/timezone/strftime.c
M src/timezone/zic.c

spinlock emulation: Fix bug when more than INT_MAX spinlocks are initialized.

commit   : 34d29222a0bbfd6dd2deecdd91aa202a7b6c3f18    
  
author   : Andres Freund <andres@anarazel.de>    
date     : Mon, 8 Jun 2020 15:25:49 -0700    
  
committer: Andres Freund <andres@anarazel.de>    
date     : Mon, 8 Jun 2020 15:25:49 -0700    

Click here for diff

Once the counter goes negative we ended up with spinlocks that errored  
out on first use (due to check in tas_sema).  
  
Author: Andres Freund  
Reviewed-By: Robert Haas  
Discussion: https://postgr.es/m/20200606023103.avzrctgv7476xj7i@alap3.anarazel.de  
Backpatch: 9.5-  

M src/backend/storage/lmgr/spin.c

Doc: fix copy-and-pasteo in ecpg docs.

commit   : 3d73d264e7efdb0bdf4633488039232b280995a6    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 16 Jun 2020 16:41:11 -0400    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 16 Jun 2020 16:41:11 -0400    

Click here for diff

The synopsis for PGTYPESinterval_free() used the wrong name.  
  
Discussion: https://postgr.es/m/159231203030.679.3061023914894071953@wrigleys.postgresql.org  

M doc/src/sgml/ecpg.sgml

Fix buffile.c error handling.

commit   : 9c14d602436543067f1a5403cff2f8c2e6f13403    
  
author   : Thomas Munro <tmunro@postgresql.org>    
date     : Tue, 16 Jun 2020 13:50:56 +1200    
  
committer: Thomas Munro <tmunro@postgresql.org>    
date     : Tue, 16 Jun 2020 13:50:56 +1200    

Click here for diff

Convert buffile.c error handling to use ereport.  This fixes cases where  
I/O errors were indistinguishable from EOF or not reported.  Also remove  
"%m" from error messages where errno would be bogus.  While we're  
modifying those strings, add block numbers and short read byte counts  
where appropriate.  
  
Back-patch to all supported releases.  
  
Reported-by: Amit Khandekar <amitdkhan.pg@gmail.com>  
Reviewed-by: Melanie Plageman <melanieplageman@gmail.com>  
Reviewed-by: Alvaro Herrera <alvherre@2ndquadrant.com>  
Reviewed-by: Robert Haas <robertmhaas@gmail.com>  
Reviewed-by: Ibrar Ahmed <ibrar.ahmad@gmail.com>  
Reviewed-by: Michael Paquier <michael@paquier.xyz>  
Discussion: https://postgr.es/m/CA%2BhUKGJE04G%3D8TLK0DLypT_27D9dR8F1RQgNp0jK6qR0tZGWOw%40mail.gmail.com  

M src/backend/access/gist/gistbuildbuffers.c
M src/backend/executor/nodeHashjoin.c
M src/backend/storage/file/buffile.c
M src/backend/utils/sort/logtape.c
M src/backend/utils/sort/sharedtuplestore.c
M src/backend/utils/sort/tuplestore.c

pg_upgrade: set vacuum_defer_cleanup_age to zero

commit   : aeb785c0f3659b6d7e611167d943f9c2aa636339    
  
author   : Bruce Momjian <bruce@momjian.us>    
date     : Mon, 15 Jun 2020 20:59:40 -0400    
  
committer: Bruce Momjian <bruce@momjian.us>    
date     : Mon, 15 Jun 2020 20:59:40 -0400    

Click here for diff

Non-zero vacuum_defer_cleanup_age values cause pg_upgrade freezing of  
the system catalogs to be incomplete, or do nothing.  This will cause  
the upgrade to fail in confusing ways.  
  
Reported-by: Laurenz Albe  
  
Discussion: https://postgr.es/m/7d6f6c22ba05ce0c526e9e8b7bfa8105e7da45e6.camel@cybertec.at  
  
Backpatch-through: 9.5  

M src/bin/pg_upgrade/server.c

Doc: Add references for SI and SSI.

commit   : 648e56d3984d7957ef7a9480d3d053fc7d65369a    
  
author   : Thomas Munro <tmunro@postgresql.org>    
date     : Mon, 15 Jun 2020 11:33:13 +1200    
  
committer: Thomas Munro <tmunro@postgresql.org>    
date     : Mon, 15 Jun 2020 11:33:13 +1200    

Click here for diff

Our documentation failed to point out that REPEATABLE READ is really  
snapshot isolation, which might be important to some users.  Point to  
the standard reference paper for this complicated topic.  
  
Likewise, add a reference to the VLDB paper about PostgreSQL SSI, for  
technical information about our SSI implementation and how it compares  
to S2PL.  
  
While here, add a note about catalog access using a lower isolation  
level, per recent user complaint.  
  
Back-patch to all releases.  
  
Reported-by: Kyle Kingsbury <aphyr@jepsen.io>  
Reviewed-by: Andres Freund <andres@anarazel.de>  
Reviewed-by: Peter Geoghegan <pg@bowt.ie>  
Reviewed-by: Tatsuo Ishii <ishii@sraoss.co.jp>  
Discussion: https://postgr.es/m/db7b729d-0226-d162-a126-8a8ab2dc4443%40jepsen.io  
Discussion: https://postgr.es/m/16454-9408996bb1750faf%40postgresql.org  

M doc/src/sgml/biblio.sgml
M doc/src/sgml/mvcc.sgml

doc: remove xreflabels from commits 75fcdd2ae2 and 85af628da5

commit   : da0a60c3d73bb057503a4dc17ca508b88bb5a195    
  
author   : Bruce Momjian <bruce@momjian.us>    
date     : Thu, 11 Jun 2020 18:19:25 -0400    
  
committer: Bruce Momjian <bruce@momjian.us>    
date     : Thu, 11 Jun 2020 18:19:25 -0400    

Click here for diff

xreflabels prevent references to the chapter numbers of sections id's.  
It should only be used in specific cases.  
  
Discussion: https://postgr.es/m/8315c0ca-7758-8823-fcb6-f37f9413e6b6@2ndquadrant.com  
  
Backpatch-through: 9.5  

M doc/src/sgml/ecpg.sgml
M doc/src/sgml/geqo.sgml
M doc/src/sgml/gin.sgml
M doc/src/sgml/gist.sgml
M doc/src/sgml/libpq.sgml
M doc/src/sgml/maintenance.sgml
M doc/src/sgml/plperl.sgml
M doc/src/sgml/plpgsql.sgml
M doc/src/sgml/plpython.sgml
M doc/src/sgml/spgist.sgml
M doc/src/sgml/spi.sgml
M doc/src/sgml/storage.sgml
M doc/src/sgml/vacuumlo.sgml

Fix mishandling of NaN counts in numeric_[avg_]combine.

commit   : 49e0a42dd584d665adc0182f1f0bb8eb848498d1    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 11 Jun 2020 17:38:42 -0400    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 11 Jun 2020 17:38:42 -0400    

Click here for diff

When merging two NumericAggStates, the code missed adding the new  
state's NaNcount unless its N was also nonzero; since those counts  
are independent, this is wrong.  
  
This would only have visible effect if some partial aggregate scans  
found only NaNs while earlier ones found only non-NaNs; then we could  
end up falsely deciding that there were no NaNs and fail to return a  
NaN final result as expected.  That's pretty improbable, so it's no  
surprise this hasn't been reported from the field.  Still, it's a bug.  
  
I didn't try to produce a regression test that would show the bug,  
but I did notice that these functions weren't being reached at all  
in our regression tests, so I improved the tests to at least  
exercise them.  With these additions, I see pretty complete code  
coverage on the aggregation-related functions in numeric.c.  
  
Back-patch to 9.6 where this code was introduced.  (I only added  
the improved test case as far back as v10, though, since the  
relevant part of aggregates.sql isn't there at all in 9.6.)  

M src/backend/utils/adt/numeric.c
M src/test/regress/expected/aggregates.out
M src/test/regress/sql/aggregates.sql

Avoid update conflict out serialization anomalies.

commit   : dd616f2ec1c517da4e6de2801f6386d01d098840    
  
author   : Peter Geoghegan <pg@bowt.ie>    
date     : Thu, 11 Jun 2020 10:09:40 -0700    
  
committer: Peter Geoghegan <pg@bowt.ie>    
date     : Thu, 11 Jun 2020 10:09:40 -0700    

Click here for diff

SSI's HeapCheckForSerializableConflictOut() test failed to correctly  
handle conditions involving a concurrently inserted tuple which is later  
concurrently updated by a separate transaction .  A SELECT statement  
that called HeapCheckForSerializableConflictOut() could end up using the  
same XID (updater's XID) for both the original tuple, and the successor  
tuple, missing the XID of the xact that created the original tuple  
entirely.  This only happened when neither tuple from the chain was  
visible to the transaction's MVCC snapshot.  
  
The observable symptoms of this bug were subtle.  A pair of transactions  
could commit, with the later transaction failing to observe the effects  
of the earlier transaction (because of the confusion created by the  
update to the non-visible row).  This bug dates all the way back to  
commit dafaa3ef, which added SSI.  
  
To fix, make sure that we check the xmin of concurrently inserted tuples  
that happen to also have been updated concurrently.  
  
Author: Peter Geoghegan  
Reported-By: Kyle Kingsbury  
Reviewed-By: Thomas Munro  
Discussion: https://postgr.es/m/db7b729d-0226-d162-a126-8a8ab2dc4443@jepsen.io  
Backpatch: All supported versions  

M src/backend/storage/lmgr/predicate.c
A src/test/isolation/expected/update-conflict-out.out
M src/test/isolation/isolation_schedule
A src/test/isolation/specs/update-conflict-out.spec

Fix typos.

commit   : 277f154e4f1ccc45b39715d777d8ff6e56fc6c55    
  
author   : Amit Kapila <akapila@postgresql.org>    
date     : Thu, 11 Jun 2020 14:10:43 +0530    
  
committer: Amit Kapila <akapila@postgresql.org>    
date     : Thu, 11 Jun 2020 14:10:43 +0530    

Click here for diff

Reported-by: John Naylor  
Author: John Naylor  
Backpatch-through: 9.5  
Discussion: https://postgr.es/m/CACPNZCtRuvs6G+EYqejhVJgBq2AKeZdXRVJsbX4syhO9gn5SNQ@mail.gmail.com  

M src/test/regress/input/largeobject.source
M src/test/regress/output/largeobject.source
M src/test/regress/output/largeobject_1.source

Update description of parameter password_encryption

commit   : 92cc60ec08c6e9c3f2b2580a0a874bd96440b89d    
  
author   : Peter Eisentraut <peter@eisentraut.org>    
date     : Wed, 10 Jun 2020 11:57:41 +0200    
  
committer: Peter Eisentraut <peter@eisentraut.org>    
date     : Wed, 10 Jun 2020 11:57:41 +0200    

Click here for diff

The previous description string still described the pre-PostgreSQL  
10 (pre eb61136dc75a76caef8460fa939244d8593100f2) behavior of  
selecting between encrypted and unencrypted, but it is now choosing  
between encryption algorithms.  

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

Avoid need for valgrind suppressions for pg_atomic_init_u64 on some platforms.

commit   : fd6daa006e7ba42c0f97fe852d83293e5e34d15c    
  
author   : Andres Freund <andres@anarazel.de>    
date     : Mon, 8 Jun 2020 19:52:19 -0700    
  
committer: Andres Freund <andres@anarazel.de>    
date     : Mon, 8 Jun 2020 19:52:19 -0700    

Click here for diff

Previously we used pg_atomic_write_64_impl inside  
pg_atomic_init_u64. That works correctly, but on platforms without  
64bit single copy atomicity it could trigger spurious valgrind errors  
about uninitialized memory, because we use compare_and_swap for atomic  
writes on such platforms.  
  
I previously suppressed one instance of this problem (6c878edc1df),  
but as Tom reports that wasn't enough. As the atomic variable cannot  
yet be concurrently accessible during initialization, it seems better  
to have pg_atomic_init_64_impl set the value directly.  
  
Change pg_atomic_init_u32_impl for symmetry.  
  
Reported-By: Tom Lane  
Author: Andres Freund  
Discussion: https://postgr.es/m/1714601.1591503815@sss.pgh.pa.us  
Backpatch: 9.5-  

M src/include/port/atomics/generic.h
M src/tools/valgrind.supp

Fix locking bugs that could corrupt pg_control.

commit   : 48eb6a3c895dac239f7e04fc3d62c09a17c1fc4a    
  
author   : Thomas Munro <tmunro@postgresql.org>    
date     : Mon, 8 Jun 2020 13:57:24 +1200    
  
committer: Thomas Munro <tmunro@postgresql.org>    
date     : Mon, 8 Jun 2020 13:57:24 +1200    

Click here for diff

The redo routines for XLOG_CHECKPOINT_{ONLINE,SHUTDOWN} must acquire  
ControlFileLock before modifying ControlFile->checkPointCopy, or the  
checkpointer could write out a control file with a bad checksum.  
  
Likewise, XLogReportParameters() must acquire ControlFileLock before  
modifying ControlFile and calling UpdateControlFile().  
  
Back-patch to all supported releases.  
  
Author: Nathan Bossart <bossartn@amazon.com>  
Author: Fujii Masao <masao.fujii@oss.nttdata.com>  
Reviewed-by: Fujii Masao <masao.fujii@oss.nttdata.com>  
Reviewed-by: Michael Paquier <michael@paquier.xyz>  
Reviewed-by: Thomas Munro <thomas.munro@gmail.com>  
Discussion: https://postgr.es/m/70BF24D6-DC51-443F-B55A-95735803842A%40amazon.com  

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

Doc: Update example symptom of systemd misconfiguration.

commit   : a35896c4b2a18b84f35c2cc6a9f5aee6ba041c43    
  
author   : Thomas Munro <tmunro@postgresql.org>    
date     : Mon, 8 Jun 2020 13:20:46 +1200    
  
committer: Thomas Munro <tmunro@postgresql.org>    
date     : Mon, 8 Jun 2020 13:20:46 +1200    

Click here for diff

In PostgreSQL 10, we stopped using System V semaphores on Linux  
systems.  Update the example we give of an error message from a  
misconfigured system to show what people are most likely to see these  
days.  
  
Back-patch to 10, where PREFERRED_SEMAPHORES=UNNAMED_POSIX arrived.  
  
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>  
Discussion: https://postgr.es/m/CA%2BhUKGLmJUSwybaPQv39rB8ABpqJq84im2UjZvyUY4feYhpWMw%40mail.gmail.com  

M doc/src/sgml/runtime.sgml

MSVC: Avoid warning when testing a TAP suite without PROVE_FLAGS.

commit   : f7faf4a5d779cc0883793fab3c1e17ea81e1603b    
  
author   : Noah Misch <noah@leadboat.com>    
date     : Sun, 7 Jun 2020 16:27:13 -0700    
  
committer: Noah Misch <noah@leadboat.com>    
date     : Sun, 7 Jun 2020 16:27:13 -0700    

Click here for diff

Commit 7be5d8df1f74b78620167d3abf32ee607e728919 surfaced the logic  
error, which had no functional implications, by adding "use warnings".  
The buildfarm always customizes PROVE_FLAGS, so the warning did not  
appear there.  Back-patch to 9.5 (all supported versions).  

M src/tools/msvc/vcregress.pl

Refresh function name in CRC-associated Valgrind suppressions.

commit   : 6c669003cfdd6814f21b15eabe9bd3d6082bbf79    
  
author   : Noah Misch <noah@leadboat.com>    
date     : Fri, 5 Jun 2020 20:10:53 -0700    
  
committer: Noah Misch <noah@leadboat.com>    
date     : Fri, 5 Jun 2020 20:10:53 -0700    

Click here for diff

Back-patch to 9.5, where commit 4f700bcd20c087f60346cb8aefd0e269be8e2157  
first appeared.  
  
Reviewed by Tom Lane.  Reported by Andrew Dunstan.  
  
Discussion: https://postgr.es/m/4dfabec2-a3ad-0546-2d62-f816c97edd0c@2ndQuadrant.com  

M src/tools/valgrind.supp

Add unlikely() to CHECK_FOR_INTERRUPTS()

commit   : 3cbf4be3e0eb36ce9e433c5bb1f0517f69a3fecc    
  
author   : Joe Conway <mail@joeconway.com>    
date     : Fri, 5 Jun 2020 16:49:32 -0400    
  
committer: Joe Conway <mail@joeconway.com>    
date     : Fri, 5 Jun 2020 16:49:32 -0400    

Click here for diff

Add the unlikely() branch hint macro to CHECK_FOR_INTERRUPTS().  
Backpatch to REL_10_STABLE where we first started using unlikely().  
  
Discussion: https://www.postgresql.org/message-id/flat/8692553c-7fe8-17d9-cbc1-7cddb758f4c6%40joeconway.com  

M src/include/miscadmin.h

Reject "23:59:60.nnn" in datetime input.

commit   : 6490376e56b09befe3d4e6792beb1d2328b61b44    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 4 Jun 2020 16:42:08 -0400    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 4 Jun 2020 16:42:08 -0400    

Click here for diff

It's intentional that we don't allow values greater than 24 hours,  
while we do allow "24:00:00" as well as "23:59:60" as inputs.  
However, the range check was miscoded in such a way that it would  
accept "23:59:60.nnn" with a nonzero fraction.  For time or timetz,  
the stored result would then be greater than "24:00:00" which would  
fail dump/reload, not to mention possibly confusing other operations.  
  
Fix by explicitly calculating the result and making sure it does not  
exceed 24 hours.  (This calculation is redundant with what will happen  
later in tm2time or tm2timetz.  Maybe someday somebody will find that  
annoying enough to justify refactoring to avoid the duplication; but  
that seems too invasive for a back-patched bug fix, and the cost is  
probably unmeasurable anyway.)  
  
Note that this change also rejects such input as the time portion  
of a timestamp(tz) value.  
  
Back-patch to v10.  The bug is far older, but to change this pre-v10  
we'd need to ensure that the logic behaves sanely with float timestamps,  
which is possibly nontrivial due to roundoff considerations.  
Doesn't really seem worth troubling with.  
  
Per report from Christoph Berg.  
  
Discussion: https://postgr.es/m/20200520125807.GB296739@msg.df7cb.de  

M src/backend/utils/adt/date.c
M src/backend/utils/adt/datetime.c
M src/backend/utils/adt/timestamp.c
M src/include/utils/date.h
M src/test/regress/expected/time.out
M src/test/regress/expected/timetz.out
M src/test/regress/sql/time.sql
M src/test/regress/sql/timetz.sql

Fix instance of elog() called while holding a spinlock

commit   : b41a85f5331751bf4f85abc5e75229620a0aa988    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Thu, 4 Jun 2020 10:18:06 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Thu, 4 Jun 2020 10:18:06 +0900    

Click here for diff

This broke the project rule to not call any complex code while a  
spinlock is held.  Issue introduced by b89e151.  
  
Discussion: https://postgr.es/m/20200602.161518.1399689010416646074.horikyota.ntt@gmail.com  
Backpatch-through: 9.5  

M src/backend/replication/logical/logical.c

Don't call palloc() while holding a spinlock, either.

commit   : 7a8cb4a61e7e17620b7c34bead033c02cea08b6c    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 3 Jun 2020 12:36:00 -0400    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 3 Jun 2020 12:36:00 -0400    

Click here for diff

Fix some more violations of the "only straight-line code inside a  
spinlock" rule.  These are hazardous not only because they risk  
holding the lock for an excessively long time, but because it's  
possible for palloc to throw elog(ERROR), leaving a stuck spinlock  
behind.  
  
copy_replication_slot() had two separate places that did pallocs  
while holding a spinlock.  We can make the code simpler and safer  
by copying the whole ReplicationSlot struct into a local variable  
while holding the spinlock, and then referencing that copy.  
(While that's arguably more cycles than we really need to spend  
holding the lock, the struct isn't all that big, and this way seems  
far more maintainable than copying fields piecemeal.  Anyway this  
is surely much cheaper than a palloc.)  That bug goes back to v12.  
  
InvalidateObsoleteReplicationSlots() not only did a palloc while  
holding a spinlock, but for extra sloppiness then leaked the memory  
--- probably for the lifetime of the checkpointer process, though  
I didn't try to verify that.  Fortunately that silliness is new  
in HEAD.  
  
pg_get_replication_slots() had a cosmetic violation of the rule,  
in that it only assumed it's safe to call namecpy() while holding  
a spinlock.  Still, that's a hazard waiting to bite somebody, and  
there were some other cosmetic coding-rule violations in the same  
function, so clean it up.  I back-patched this as far as v10; the  
code exists before that but it looks different, and this didn't  
seem important enough to adapt the patch further back.  
  
Discussion: https://postgr.es/m/20200602.161518.1399689010416646074.horikyota.ntt@gmail.com  

M src/backend/replication/slotfuncs.c
M src/include/replication/slot.h

Fix use-after-release mistake in currtid() and currtid2() for views

commit   : 8bc74490df252215ce5b618442900e7a107be2a1    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Mon, 1 Jun 2020 14:41:32 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Mon, 1 Jun 2020 14:41:32 +0900    

Click here for diff

This issue has been present since the introduction of this code as of  
a3519a2 from 2002, and has been found by buildfarm member prion that  
uses RELCACHE_FORCE_RELEASE via the tests introduced recently in  
e786be5.  
  
Discussion: https://postgr.es/m/20200601022055.GB4121@paquier.xyz  
Backpatch-through: 9.5  

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

Make install-tests target work with vpath builds

commit   : f4f4d64eafcd07880fee570e367422af757d3f02    
  
author   : Andrew Dunstan <andrew@dunslane.net>    
date     : Sun, 31 May 2020 18:33:00 -0400    
  
committer: Andrew Dunstan <andrew@dunslane.net>    
date     : Sun, 31 May 2020 18:33:00 -0400    

Click here for diff

Also add a top-level install-tests target.  
  
Backpatch to all live branches.  
  
Craig Ringer, tweaked by me.  

M GNUmakefile.in
M src/test/regress/GNUmakefile

llvmjit: Fix building against LLVM 11 by removing unnecessary include.

commit   : c001c115bcb2accddc23a25c605886e01475db4f    
  
author   : Andres Freund <andres@anarazel.de>    
date     : Thu, 28 May 2020 15:08:12 -0700    
  
committer: Andres Freund <andres@anarazel.de>    
date     : Thu, 28 May 2020 15:08:12 -0700    

Click here for diff

LLVM has removed this header, in the branch that will become llvm  
11. But as it turns out we didn't actually need it, so just remove it.  
  
Author: Jesse Zhang <sbjesse@gmail.com>  
Discussion: https://postgr.es/m/CAGf+fX7bvtP0YXMu7pOsu_NwhxW6dArTkxb=jt7M2-UJkyJ_3g@mail.gmail.com  
Backpatch: 11, where JIT support using llvm was introduced.  

M src/backend/jit/llvm/llvmjit_inline.cpp

commit   : 49a00e07c534d0d4378d40b6240e061640051304    
  
author   : Joe Conway <mail@joeconway.com>    
date     : Thu, 28 May 2020 13:45:02 -0400    
  
committer: Joe Conway <mail@joeconway.com>    
date     : Thu, 28 May 2020 13:45:02 -0400    

Click here for diff

Two of the members of rconn were left uninitialized. When  
dblink_open() is called without an outer transaction it  
handles the initialization for us, but with an outer  
transaction it does not. Arrange for initialization  
in all cases. Backpatch to all supported versions.  
  
Reported-by: Alexander Lakhin  
Discussion: https://www.postgresql.org/message-id/flat/9bd0744f-5f04-c778-c5b3-809efe9c30c7%40joeconway.com#c545909a41664991aca60c4d70a10ce7  

M contrib/dblink/dblink.c

Add CHECK_FOR_INTERRUPTS() to the repeat() function

commit   : 36758c472ea71dae96f4b495df65490413c79c83    
  
author   : Joe Conway <mail@joeconway.com>    
date     : Thu, 28 May 2020 13:17:04 -0400    
  
committer: Joe Conway <mail@joeconway.com>    
date     : Thu, 28 May 2020 13:17:04 -0400    

Click here for diff

The repeat() function loops for potentially a long time without  
ever checking for interrupts. This prevents, for example, a query  
cancel from interrupting until the work is all done. Fix by  
inserting a CHECK_FOR_INTERRUPTS() into the loop.  
  
Backpatch to all supported versions.  
  
Discussion: https://www.postgresql.org/message-id/flat/8692553c-7fe8-17d9-cbc1-7cddb758f4c6%40joeconway.com  

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

Add missing error code to "cannot attach index ..." error.

commit   : 34301c9c5674919ef2e786f1157b3ced543b02e2    
  
author   : Heikki Linnakangas <heikki.linnakangas@iki.fi>    
date     : Thu, 28 May 2020 12:37:00 +0300    
  
committer: Heikki Linnakangas <heikki.linnakangas@iki.fi>    
date     : Thu, 28 May 2020 12:37:00 +0300    

Click here for diff

ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE was used in an ereport with the  
same message but different errdetail a few lines earlier, so use that  
here as well.  
  
Backpatch-through: 11  

M src/backend/commands/tablecmds.c

Fix typo in test comment.

commit   : 25fc24ba90df99d3c331627f3e4efb795a440dd0    
  
author   : Heikki Linnakangas <heikki.linnakangas@iki.fi>    
date     : Thu, 28 May 2020 12:35:18 +0300    
  
committer: Heikki Linnakangas <heikki.linnakangas@iki.fi>    
date     : Thu, 28 May 2020 12:35:18 +0300    

Click here for diff

The same comment was copied to a few different places, with the same typo.  
Backpatch down to v11, where this typo was introduced.  

M src/test/regress/expected/alter_table.out
M src/test/regress/expected/hash_part.out
M src/test/regress/expected/insert.out
M src/test/regress/expected/partition_prune.out
M src/test/regress/sql/alter_table.sql
M src/test/regress/sql/hash_part.sql
M src/test/regress/sql/insert.sql
M src/test/regress/sql/partition_prune.sql

Add a temp-install prerequisite to top-level "check-tests".

commit   : 9d47294ab7c45a64cd844fb7298bef91c16fafbe    
  
author   : Noah Misch <noah@leadboat.com>    
date     : Mon, 25 May 2020 16:21:04 -0700    
  
committer: Noah Misch <noah@leadboat.com>    
date     : Mon, 25 May 2020 16:21:04 -0700    

Click here for diff

The target failed, tested $PATH binaries, or tested a stale temporary  
installation.  Commit c66b438db62748000700c9b90b585e756dd54141 missed  
this.  Back-patch to 9.5 (all supported versions).  

M GNUmakefile.in

doc: suggest 1.1 as a random_page_cost value for SSDs

commit   : b75f73dc0cf792171cacdc536327807dbd496205    
  
author   : Bruce Momjian <bruce@momjian.us>    
date     : Thu, 21 May 2020 20:28:38 -0400    
  
committer: Bruce Momjian <bruce@momjian.us>    
date     : Thu, 21 May 2020 20:28:38 -0400    

Click here for diff

Reported-by: yigong hu  
  
Discussion: https://postgr.es/m/CAOxFffcourucFqSk+tZA13ErS3XRYkDy6EeaPff4AvHGiEEuug@mail.gmail.com  
  
Backpatch-through: 9.5  

M doc/src/sgml/config.sgml

doc: Simplify mention of unique indexes for NULL control

commit   : 00c51b365c90e3177a05026afda20f8aae7f997a    
  
author   : Bruce Momjian <bruce@momjian.us>    
date     : Thu, 21 May 2020 19:49:30 -0400    
  
committer: Bruce Momjian <bruce@momjian.us>    
date     : Thu, 21 May 2020 19:49:30 -0400    

Click here for diff

Discussion: https://postgr.es/m/2304.1586532634@sss.pgh.pa.us  
  
Backpatch-through: 9.5  

M doc/src/sgml/indices.sgml

Fix MSVC installations with multiple "configure" files detected

commit   : bb24af50d515651b950e153fdd25ddb46184a57b    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Thu, 21 May 2020 14:41:33 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Thu, 21 May 2020 14:41:33 +0900    

Click here for diff

When installing binaries and libraries using the MSVC installation  
routines, the operation gets done after moving to the root folder, whose  
location is detected by checking if "configure" exists two times in a  
row.  So, calling the installation script from src/tools/msvc/ with an  
extra "configure" file four levels up the root path of the code tree  
causes the execution to go further up, leading to a failure in finding  
the builds.  This commit fixes the issue by moving to the root folder of  
the code tree only once, when necessary.  
  
Author: Arnold Müller  
Reviewed-by: Daniel Gustafsson  
Discussion: https://postgr.es/m/16343-f638f67e7e52b86c@postgresql.org  
Backpatch-through: 9.5  

M src/tools/msvc/Install.pm

Doc: Fix description of pg_class.relreplident

commit   : 673582d21f30871d9b5d04449e6b2b7acde69209    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Wed, 20 May 2020 14:21:50 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Wed, 20 May 2020 14:21:50 +0900    

Click here for diff

The description missed a comma and lacked an explanation of what happens  
with REPLICA IDENTITY USING INDEX when the dependent index is dropped.  
  
Author: Marina Polyakova  
Reviewed-by: Daniel Gustafsson, Michael Paquier  
Discussion: https://postgr.es/m/ad1a0badc32658b1bbb07aa312346a1d@postgrespro.ru  
Backpatch-through: 9.5  

M doc/src/sgml/catalogs.sgml

Fix comment in slot.c.

commit   : 1567ed9b3adc66f00922a9dce06b108c2710d046    
  
author   : Amit Kapila <akapila@postgresql.org>    
date     : Mon, 18 May 2020 08:16:45 +0530    
  
committer: Amit Kapila <akapila@postgresql.org>    
date     : Mon, 18 May 2020 08:16:45 +0530    

Click here for diff

Reported-by: Sawada Masahiko  
Author: Sawada Masahiko  
Reviewed-by: Amit Kapila  
Backpatch-through: 9.5  
Discussion: https://postgr.es/m/CA+fd4k4Ws7M7YQ8PqSym5WB1y75dZeBTd1sZJUQdfe0KJQ-iSA@mail.gmail.com  

M src/backend/replication/slot.c

Fix assertion with relation using REPLICA IDENTITY FULL in subscriber

commit   : 70ae82b9b4b5871604ba4e98ebe0f32bef223200    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Sat, 16 May 2020 18:16:37 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Sat, 16 May 2020 18:16:37 +0900    

Click here for diff

In a logical replication subscriber, a table using REPLICA IDENTITY FULL  
which has a primary key would try to use the primary key's index  
available to scan for a tuple, but an assertion only assumed as correct  
the case of an index associated to REPLICA IDENTITY USING INDEX.  This  
commit corrects the assertion so as the use of a primary key index is a  
valid case.  
  
Reported-by: Dilip Kumar  
Analyzed-by: Dilip Kumar  
Author: Euler Taveira  
Reviewed-by: Michael Paquier, Masahiko Sawada  
Discussion: https://postgr.es/m/CAFiTN-u64S5bUiPL1q5kwpHNd0hRnf1OE-bzxNiOs5zo84i51w@mail.gmail.com  
Backpatch-through: 10  

M src/backend/executor/execReplication.c
M src/test/subscription/t/001_rep_changes.pl

Fix bogus initialization of replication origin shared memory state.

commit   : ee39a4b9e475348dd3de82781a54be82e63a3186    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 15 May 2020 19:05:39 -0400    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 15 May 2020 19:05:39 -0400    

Click here for diff

The previous coding zeroed out offsetof(ReplicationStateCtl, states)  
more bytes than it was entitled to, as a consequence of starting the  
zeroing from the wrong pointer (or, if you prefer, using the wrong  
calculation of how much to zero).  
  
It's unsurprising that this has not caused any reported problems,  
since it can be expected that the newly-allocated block is at the end  
of what we've used in shared memory, and we always make the shmem  
block substantially bigger than minimally necessary.  Nonetheless,  
this is wrong and it could bite us someday; plus it's a dangerous  
model for somebody to copy.  
  
This dates back to the introduction of this code (commit 5aa235042),  
so back-patch to all supported branches.  

M src/backend/replication/logical/origin.c

Avoid killing btree items that are already dead

commit   : 37b5c5fde46ad3081f02668846f4d125ca4f7992    
  
author   : Alvaro Herrera <alvherre@alvh.no-ip.org>    
date     : Fri, 15 May 2020 16:50:34 -0400    
  
committer: Alvaro Herrera <alvherre@alvh.no-ip.org>    
date     : Fri, 15 May 2020 16:50:34 -0400    

Click here for diff

_bt_killitems marks btree items dead when a scan leaves the page where  
they live, but it does so with only share lock (to improve concurrency).  
This was historicall okay, since killing a dead item has no  
consequences.  However, with the advent of data checksums and  
wal_log_hints, this action incurs a WAL full-page-image record of the  
page.  Multiple concurrent processes would write the same page several  
times, leading to WAL bloat.  The probability of this happening can be  
reduced by only killing items if they're not already dead, so change the  
code to do that.  
  
The problem could eliminated completely by having _bt_killitems upgrade  
to exclusive lock upon seeing a killable item, but that would reduce  
concurrency so it's considered a cure worse than the disease.  
  
Backpatch all the way back to 9.5, since wal_log_hints was introduced in  
9.4.  
  
Author: Masahiko Sawada <masahiko.sawada@2ndquadrant.com>  
Discussion: https://postgr.es/m/CA+fd4k6PeRj2CkzapWNrERkja5G0-6D-YQiKfbukJV+qZGFZ_Q@mail.gmail.com  

M src/backend/access/nbtree/nbtutils.c

docs: add xreflabel entries for autovacuum, SP-GiST, and TOAST

commit   : bc4a8b460079af2bc244087479684862d6794770    
  
author   : Bruce Momjian <bruce@momjian.us>    
date     : Fri, 15 May 2020 12:38:40 -0400    
  
committer: Bruce Momjian <bruce@momjian.us>    
date     : Fri, 15 May 2020 12:38:40 -0400    

Click here for diff

This is for use by the PG 13 release notes, but might be used for minor  
release notes in the future.  
  
Backpatch-through: 9.5  

M doc/src/sgml/maintenance.sgml
M doc/src/sgml/spgist.sgml
M doc/src/sgml/storage.sgml

doc: add missing xreflabels to the main docs (not refs)

commit   : 621455b78318d5fb2d2f4062d20c1af1f50bd1d7    
  
author   : Bruce Momjian <bruce@momjian.us>    
date     : Fri, 15 May 2020 12:05:43 -0400    
  
committer: Bruce Momjian <bruce@momjian.us>    
date     : Fri, 15 May 2020 12:05:43 -0400    

Click here for diff

Add missing xreflabels for index types, geqo, libpq, spi, server-side  
languages, ecpg, and vaacuumlo.  
  
Backpatch-through: 9.5  

M doc/src/sgml/ecpg.sgml
M doc/src/sgml/geqo.sgml
M doc/src/sgml/gin.sgml
M doc/src/sgml/gist.sgml
M doc/src/sgml/libpq.sgml
M doc/src/sgml/plperl.sgml
M doc/src/sgml/plpgsql.sgml
M doc/src/sgml/plpython.sgml
M doc/src/sgml/spi.sgml
M doc/src/sgml/vacuumlo.sgml

doc: remove extra blank line at the top of SGML files

commit   : a4def04df5fa1c01e38f6dd8941a07c60da01068    
  
author   : Bruce Momjian <bruce@momjian.us>    
date     : Fri, 15 May 2020 09:55:43 -0400    
  
committer: Bruce Momjian <bruce@momjian.us>    
date     : Fri, 15 May 2020 09:55:43 -0400    

Click here for diff

Backpatch-through: 9.5  

M doc/src/sgml/ref/copy.sgml

doc: make ref/*.sgml file header comment layout consistent

commit   : d9cbdec23fd63a8ac650ab174d5d33ab5fcc3bb4    
  
author   : Bruce Momjian <bruce@momjian.us>    
date     : Fri, 15 May 2020 08:52:24 -0400    
  
committer: Bruce Momjian <bruce@momjian.us>    
date     : Fri, 15 May 2020 08:52:24 -0400    

Click here for diff

M doc/src/sgml/ref/checkpoint.sgml
M doc/src/sgml/ref/create_cast.sgml
M doc/src/sgml/ref/create_collation.sgml
M doc/src/sgml/ref/create_conversion.sgml
M doc/src/sgml/ref/create_foreign_table.sgml
M doc/src/sgml/ref/create_function.sgml
M doc/src/sgml/ref/create_procedure.sgml
M doc/src/sgml/ref/create_transform.sgml
M doc/src/sgml/ref/drop_cast.sgml
M doc/src/sgml/ref/drop_collation.sgml
M doc/src/sgml/ref/drop_conversion.sgml
M doc/src/sgml/ref/drop_foreign_table.sgml
M doc/src/sgml/ref/drop_transform.sgml
M doc/src/sgml/ref/load.sgml
M doc/src/sgml/ref/pg_config-ref.sgml
M doc/src/sgml/ref/pg_restore.sgml
M doc/src/sgml/ref/pgarchivecleanup.sgml
M doc/src/sgml/ref/pgbench.sgml
M doc/src/sgml/ref/pgtestfsync.sgml
M doc/src/sgml/ref/pgtesttiming.sgml
M doc/src/sgml/ref/pgupgrade.sgml
M doc/src/sgml/ref/set_constraints.sgml
M doc/src/sgml/ref/set_session_auth.sgml
M doc/src/sgml/ref/set_transaction.sgml

Fix amcheck for page checks concurrent to replay of btree page deletion

commit   : b9a45d8dba4de6db14f03adf8f1a8ce51d43005b    
  
author   : Alexander Korotkov <akorotkov@postgresql.org>    
date     : Wed, 6 May 2020 15:35:27 +0300    
  
committer: Alexander Korotkov <akorotkov@postgresql.org>    
date     : Wed, 6 May 2020 15:35:27 +0300    

Click here for diff

amcheck expects at least hikey to always exist on leaf page even if it is  
deleted page.  But replica reinitializes page during replay of page deletion,  
causing deleted page to have no items.  Thus, replay of page deletion can  
cause an error in concurrent amcheck run.  
  
This commit relaxes amcheck expectation making it tolerate deleted page with  
no items.  
  
Reported-by: Konstantin Knizhnik  
Discussion: https://postgr.es/m/CAPpHfdt_OTyQpXaPJcWzV2N-LNeNJseNB-K_A66qG%3DL518VTFw%40mail.gmail.com  
Author: Alexander Korotkov  
Reviewed-by: Peter Geoghegan  
Backpatch-through: 11  

M contrib/amcheck/verify_nbtree.c

Fix the MSVC build for versions 2015 and later.

commit   : 1fbfc3d8a59a570db1e13e8a54b0774e7255ced0    
  
author   : Amit Kapila <akapila@postgresql.org>    
date     : Thu, 14 May 2020 09:39:04 +0530    
  
committer: Amit Kapila <akapila@postgresql.org>    
date     : Thu, 14 May 2020 09:39:04 +0530    

Click here for diff

Visual Studio 2015 and later versions should still be able to do the same  
as Visual Studio 2012, but the declaration of locale_name is missing in  
_locale_t, causing the code compilation to fail, hence this falls back  
instead on to enumerating all system locales by using EnumSystemLocalesEx  
to find the required locale name.  If the input argument is in Unix-style  
then we can get ISO Locale name directly by using GetLocaleInfoEx() with  
LCType as LOCALE_SNAME.  
  
In passing, change the documentation references of the now obsolete links.  
  
Note that this problem occurs only with NLS enabled builds.  
  
Author: Juan José Santamaría Flecha, Davinder Singh and Amit Kapila  
Reviewed-by: Ranier Vilela and Amit Kapila  
Backpatch-through: 9.5  
Discussion: https://postgr.es/m/CAHzhFSFoJEWezR96um4-rg5W6m2Rj9Ud2CNZvV4NWc9tXV7aXQ@mail.gmail.com  

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

Fix pg_recvlogical avoidance of superfluous Standby Status Update.

commit   : a267894529b260002cdb85cde9680529ae4ceeb4    
  
author   : Noah Misch <noah@leadboat.com>    
date     : Wed, 13 May 2020 20:42:09 -0700    
  
committer: Noah Misch <noah@leadboat.com>    
date     : Wed, 13 May 2020 20:42:09 -0700    

Click here for diff

The defect suppressed a Standby Status Update message when bytes flushed  
to disk had changed but bytes received had not changed.  If  
pg_recvlogical then exited with no intervening Standby Status Update,  
the next pg_recvlogical repeated already-flushed records.  The defect  
could also cause superfluous messages, which are functionally harmless.  
Back-patch to 9.5 (all supported versions).  
  
Discussion: https://postgr.es/m/20200502221647.GA3941274@rfd.leadboat.com  

M src/bin/pg_basebackup/pg_recvlogical.c

In successful pg_recvlogical, end PGRES_COPY_OUT cleanly.

commit   : 357012e17f3f7d47bd276d4441c28fbcd58a2c8b    
  
author   : Noah Misch <noah@leadboat.com>    
date     : Wed, 13 May 2020 20:42:09 -0700    
  
committer: Noah Misch <noah@leadboat.com>    
date     : Wed, 13 May 2020 20:42:09 -0700    

Click here for diff

pg_recvlogical merely called PQfinish(), so the backend sent messages  
after the disconnect.  When that caused EPIPE in internal_flush(),  
before a LogicalConfirmReceivedLocation(), the next pg_recvlogical would  
repeat already-acknowledged records.  Whether or not the defect causes  
EPIPE, post-disconnect messages could contain an ErrorResponse that the  
user should see.  One properly ends PGRES_COPY_OUT by repeating  
PQgetCopyData() until it returns a negative value.  Augment one of the  
tests to cover the case of WAL past --endpos.  Back-patch to v10, where  
commit 7c030783a5bd07cadffc2a1018bc33119a4c7505 first appeared.  Before  
that commit, pg_recvlogical never reached PGRES_COPY_OUT.  
  
Reported by Thomas Munro.  
  
Discussion: https://postgr.es/m/CAEepm=1MzM2Z_xNe4foGwZ1a+MO_2S9oYDq3M5D11=JDU_+0Nw@mail.gmail.com  

M src/bin/pg_basebackup/pg_recvlogical.c
M src/test/recovery/t/006_logical_decoding.pl