PostgreSQL 12.2 (upcoming) commit log

Fix edge case leading to agg transitions skipping ExecAggTransReparent() calls.

commit   : 21fdfd0e8d223a31aeed2b167e6ce4f653e9c51c    
  
author   : Andres Freund <andres@anarazel.de>    
date     : Mon, 20 Jan 2020 23:26:51 -0800    
  
committer: Andres Freund <andres@anarazel.de>    
date     : Mon, 20 Jan 2020 23:26:51 -0800    

Click here for diff

The code checking whether an aggregate transition value needs to be  
reparented into the current context has always only compared the  
transition return value with the previous transition value by datum,  
i.e. without regard for NULLness.  This normally works, because when  
the transition function returns NULL (via fcinfo->isnull), it'll  
return a value that won't be the same as its input value.  
  
But there's no hard requirement that that's the case. And it turns  
out, it's possible to hit this case (see discussion or reproducers),  
leading to a non-null transition value not being reparented, followed  
by a crash caused by that.  
  
Instead of adding another comparison of NULLness, instead have  
ExecAggTransReparent() ensure that pergroup->transValue ends up as 0  
when the new transition value is NULL. That avoids having to add an  
additional branch to the much more common cases of the transition  
function returning the old transition value (which is a pointer in  
this case), and when the new value is different, but not NULL.  
  
In branches since 69c3936a149, also deduplicate the reparenting code  
between the expression evaluation based transitions, and the path for  
ordered aggregates.  
  
Reported-By: Teodor Sigaev, Nikita Glukhov  
Author: Andres Freund  
Discussion: https://postgr.es/m/bd34e930-cfec-ea9b-3827-a8bc50891393@sigaev.ru  
Backpatch: 9.4-, this issue has existed since at least 7.4  

M src/backend/executor/execExprInterp.c
M src/backend/executor/nodeAgg.c

Add GUC variables for stat tracking and timeout as PGDLLIMPORT

commit   : ef8e6b2c2ba05f27b7bbfcb1a180db07d1c274ee    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Tue, 21 Jan 2020 13:46:55 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Tue, 21 Jan 2020 13:46:55 +0900    

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This helps integration of extensions with Windows.  The following  
parameters are changed:  
- idle_in_transaction_session_timeout (9.6 and newer versions)  
- lock_timeout  
- statement_timeout  
- track_activities  
- track_counts  
- track_functions  
  
Author: Pascal Legrand  
Reviewed-by: Amit Kamila, Julien Rouhaud, Michael Paquier  
Discussion: https://postgr.es/m/1579298868581-0.post@n3.nabble.com  
Backpatch-through: 9.4  

M src/include/pgstat.h
M src/include/storage/proc.h

Fix pg_dump's sigTermHandler() to use _exit() not exit().

commit   : 71b121f425486c2a02f88f90e2a7c852182b5af0    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 20 Jan 2020 12:57:17 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 20 Jan 2020 12:57:17 -0500    

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sigTermHandler() tried to be careful to invoke only operations that  
are safe to do in a signal handler.  But for some reason we forgot  
that exit(3) is not among those, because it calls atexit handlers  
that might do various random things.  (pg_dump itself installs no  
atexit handlers, but e.g. OpenSSL does.)  That led to crashes or  
lockups when attempting to terminate a parallel dump or restore  
via a signal.  
  
Fix by calling _exit() instead.  
  
Per bug #16199 from Raúl Marín.  Back-patch to all supported branches.  
  
Discussion: https://postgr.es/m/16199-cb2f121146a96f9b@postgresql.org  

M src/bin/pg_dump/parallel.c

Fix crash in BRIN inclusion op functions, due to missing datum copy.

commit   : fd436bba01f6df843a9f421669c02e2b970fdc7a    
  
author   : Heikki Linnakangas <heikki.linnakangas@iki.fi>    
date     : Mon, 20 Jan 2020 10:36:35 +0200    
  
committer: Heikki Linnakangas <heikki.linnakangas@iki.fi>    
date     : Mon, 20 Jan 2020 10:36:35 +0200    

Click here for diff

The BRIN add_value() and union() functions need to make a longer-lived  
copy of the argument, if they want to store it in the BrinValues struct  
also passed as argument. The functions for the "inclusion operator  
classes" used with box, range and inet types didn't take into account  
that the union helper function might return its argument as is, without  
making a copy. Check for that case, and make a copy if necessary. That  
case arises at least with the range_union() function, when one of the  
arguments is an 'empty' range:  
  
CREATE TABLE brintest (n numrange);  
CREATE INDEX brinidx ON brintest USING brin (n);  
INSERT INTO brintest VALUES ('empty');  
INSERT INTO brintest VALUES (numrange(0, 2^1000::numeric));  
INSERT INTO brintest VALUES ('(-1, 0)');  
  
SELECT brin_desummarize_range('brinidx', 0);  
SELECT brin_summarize_range('brinidx', 0);  
  
Backpatch down to 9.5, where BRIN was introduced.  
  
Discussion: https://www.postgresql.org/message-id/e6e1d6eb-0a67-36aa-e779-bcca59167c14%40iki.fi  
Reviewed-by: Emre Hasegeli, Tom Lane, Alvaro Herrera  

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

Fix out-of-memory handling in ecpglib.

commit   : c7c2cc67007741338a36a8d7aa86e23600aa5e18    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sun, 19 Jan 2020 19:15:15 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sun, 19 Jan 2020 19:15:15 -0500    

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ecpg_build_params() would crash on a null pointer dereference if  
realloc() failed, due to updating the persistent "stmt" struct  
too aggressively.  (Even without the crash, this would've leaked  
the old storage that we were trying to realloc.)  
  
Per Coverity.  This seems to have been broken in commit 0cc050794,  
so back-patch into v12.  

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

Add GUC checks for ssl_min_protocol_version and ssl_max_protocol_version

commit   : ac2dcca5dfe62177fd871a8f4f71430a1c92382c    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Sat, 18 Jan 2020 12:32:55 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Sat, 18 Jan 2020 12:32:55 +0900    

Click here for diff

Mixing incorrect bounds set in the SSL context leads to confusing error  
messages generated by OpenSSL which are hard to act on.  New checks are  
added within the GUC machinery to improve the user experience as they  
apply to any SSL implementation, not only OpenSSL, and doing the checks  
beforehand avoids the creation of a SSL during a reload (or startup)  
which we know will never be used anyway.  
  
Backpatch down to 12, as those parameters have been introduced by  
e73e67c.  
  
Author: Michael Paquier  
Reviewed-by: Daniel Gustafsson  
Discussion: https://postgr.es/m/20200114035420.GE1515@paquier.xyz  
Backpatch-through: 12  

M src/backend/utils/misc/guc.c
M src/test/ssl/t/001_ssltests.pl
M src/test/ssl/t/SSLServer.pm

Repair more failures with SubPlans in multi-row VALUES lists.

commit   : 2e2646060e18461de24e3585344095664dc7727b    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 17 Jan 2020 16:17:17 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 17 Jan 2020 16:17:17 -0500    

Click here for diff

Commit 9b63c13f0 turns out to have been fundamentally misguided:  
the parent node's subPlan list is by no means the only way in which  
a child SubPlan node can be hooked into the outer execution state.  
As shown in bug #16213 from Matt Jibson, we can also get short-lived  
tuple table slots added to the outer es_tupleTable list.  At this point  
I have little faith that there aren't other possible connections as  
well; the long time it took to notice this problem shows that this  
isn't a heavily-exercised situation.  
  
Therefore, revert that fix, returning to the coding that passed a  
NULL parent plan pointer down to the transiently-built subexpressions.  
That gives us a pretty good guarantee that they won't hook into the  
outer executor state in any way.  But then we need some other solution  
to make SubPlans work.  Adopt the solution speculated about in the  
previous commit's log message: do expression initialization at plan  
startup for just those VALUES rows containing SubPlans, abandoning the  
goal of reclaiming memory intra-query for those rows.  In practice it  
seems unlikely that queries containing a vast number of VALUES rows  
would be using SubPlans in them, so this should not give up much.  
  
(BTW, this test case also refutes my claim in connection with the prior  
commit that the issue only arises with use of LATERAL.  That was just  
wrong: some variants of SubLink always produce SubPlans.)  
  
As with previous patch, back-patch to all supported branches.  
  
Discussion: https://postgr.es/m/16213-871ac3bc208ecf23@postgresql.org  

M src/backend/executor/nodeValuesscan.c
M src/include/nodes/execnodes.h
M src/test/regress/expected/subselect.out
M src/test/regress/sql/subselect.sql

Set ReorderBufferTXN->final_lsn more eagerly

commit   : bc2140627ff14c207a0af990b8ea3860e188e6b1    
  
author   : Alvaro Herrera <alvherre@alvh.no-ip.org>    
date     : Fri, 17 Jan 2020 18:00:39 -0300    
  
committer: Alvaro Herrera <alvherre@alvh.no-ip.org>    
date     : Fri, 17 Jan 2020 18:00:39 -0300    

Click here for diff

... specifically, set it incrementally as each individual change is  
spilled down to disk.  This way, it is set correctly when the  
transaction disappears without trace, ie. without leaving an XACT_ABORT  
wal record.  (This happens when the server crashes midway through a  
transaction.)  
  
Failing to have final_lsn prevents ReorderBufferRestoreCleanup() from  
working, since it needs the final_lsn in order to know the endpoint of  
its iteration through spilled files.  
  
Commit df9f682c7bf8 already tried to fix the problem, but it didn't set  
the final_lsn in all cases.  Revert that, since it's no longer needed.  
  
Author: Vignesh C  
Reviewed-by: Amit Kapila, Dilip Kumar  
Discussion: https://postgr.es/m/CALDaNm2CLk+K9JDwjYST0sPbGg5AQdvhUt0jbKyX_HdAE0jk3A@mail.gmail.com  

M src/backend/replication/logical/reorderbuffer.c
M src/include/replication/reorderbuffer.h

Allocate freechunks bitmap as part of SlabContext

commit   : 162c951dfe8f0a894f2832e04aacfc3a0a7bf50c    
  
author   : Tomas Vondra <tomas.vondra@postgresql.org>    
date     : Fri, 17 Jan 2020 14:06:28 +0100    
  
committer: Tomas Vondra <tomas.vondra@postgresql.org>    
date     : Fri, 17 Jan 2020 14:06:28 +0100    

Click here for diff

The bitmap used by SlabCheck to cross-check free chunks in a block used  
to be allocated for each SlabCheck call, and was never freed. The memory  
leak could be fixed by simply adding a pfree call, but it's actually a  
bad idea to do any allocations in SlabCheck at all as it assumes the  
state of the memory management as a whole is sane.  
  
So instead we allocate the bitmap as part of SlabContext, which means  
we don't need to do any allocations in SlabCheck and the bitmap goes  
away together with the SlabContext.  
  
Backpatch to 10, where the Slab context was introduced.  
  
Author: Tomas Vondra  
Reported-by: Andres Freund  
Reviewed-by: Tom Lane  
Backpatch-through: 10  
Discussion: https://www.postgresql.org/message-id/20200116044119.g45f7pmgz4jmodxj%40alap3.anarazel.de  

M src/backend/utils/mmgr/slab.c

Fix buggy logic in isTempNamespaceInUse()

commit   : 0fca3d0a4ec297bff5a5cb01dfe345e0f63d7d63    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Wed, 15 Jan 2020 13:58:41 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Wed, 15 Jan 2020 13:58:41 +0900    

Click here for diff

The logic introduced in this routine as of 246a6c8 would report an  
incorrect result when a session calls it to check if the temporary  
namespace owned by the session is in use or not.  It is possible to  
optimize more the routine in this case to avoid a PGPROC lookup, but  
let's keep the logic simple.  As this routine is used only by autovacuum  
for now, there were no live bugs, still let's be correct for any future  
code involving it.  
  
Author: Michael Paquier  
Reviewed-by: Julien Rouhaud  
Discussion: https://postgr.es/m/20200113093703.GA41902@paquier.xyz  
Backpatch-through: 11  

M src/backend/catalog/namespace.c

docs: change "default role" wording to "predefined role"

commit   : 29af9c542f6cdc9a6456b175fdcdfe7a28b77d6c    
  
author   : Bruce Momjian <bruce@momjian.us>    
date     : Tue, 14 Jan 2020 13:13:04 -0500    
  
committer: Bruce Momjian <bruce@momjian.us>    
date     : Tue, 14 Jan 2020 13:13:04 -0500    

Click here for diff

The new wording was determined to be more accurate.  Also, update  
release note links that reference these sections.  
  
Reported-by: rirans@comcast.net  
  
Discussion: https://postgr.es/m/157742545062.1149.11052653770497832538@wrigleys.postgresql.org  
  
Backpatch-through: 9.6  

M doc/src/sgml/monitoring.sgml
M doc/src/sgml/user-manag.sgml

Make rewriter prevent auto-updates on views with conditional INSTEAD rules.

commit   : fd5476b79c2ff63dd32e154198f8201553180e58    
  
author   : Dean Rasheed <dean.a.rasheed@gmail.com>    
date     : Tue, 14 Jan 2020 09:51:28 +0000    
  
committer: Dean Rasheed <dean.a.rasheed@gmail.com>    
date     : Tue, 14 Jan 2020 09:51:28 +0000    

Click here for diff

A view with conditional INSTEAD rules and no unconditional INSTEAD  
rules or INSTEAD OF triggers is not auto-updatable. Previously we  
relied on a check in the executor to catch this, but that's  
problematic since the planner may fail to properly handle such a query  
and thus return a particularly unhelpful error to the user, before  
reaching the executor check.  
  
Instead, trap this in the rewriter and report the correct error there.  
Doing so also allows us to include more useful error detail than the  
executor check can provide. This doesn't change the existing behaviour  
of updatable views; it merely ensures that useful error messages are  
reported when a view isn't updatable.  
  
Per report from Pengzhou Tang, though not adopting that suggested fix.  
Back-patch to all supported branches.  
  
Discussion: https://postgr.es/m/CAG4reAQn+4xB6xHJqWdtE0ve_WqJkdyCV4P=trYr4Kn8_3_PEA@mail.gmail.com  

M src/backend/executor/execMain.c
M src/backend/rewrite/rewriteHandler.c
M src/test/regress/expected/updatable_views.out
M src/test/regress/sql/updatable_views.sql

Revert test added by commit d207038053.

commit   : fa1eaebfad436f58a8e6d0201f334edd2553b3d2    
  
author   : Amit Kapila <akapila@postgresql.org>    
date     : Sat, 11 Jan 2020 10:44:39 +0530    
  
committer: Amit Kapila <akapila@postgresql.org>    
date     : Sat, 11 Jan 2020 10:44:39 +0530    

Click here for diff

This test was trying to test the mechanism to release kernel FDs as needed  
to get us under the max_safe_fds limit in case of spill files.  To do that,  
it needs to set max_files_per_process to a very low value which doesn't  
even permit starting of the server in the case when there are a few already  
opened files.  This test also won't work on platforms where we use one FD  
per semaphore.  
  
Backpatch-through: 10, till where this test was added  
Discussion:  
https://postgr.es/m/CAA4eK1LHhERi06Q+MmP9qBXBBboi+7WV3910J0aUgz71LcnKAw@mail.gmail.com  
https://postgr.es/m/6485.1578583522@sss.pgh.pa.us  

M src/test/recovery/t/006_logical_decoding.pl

Fix base backup with database OIDs larger than INT32_MAX

commit   : bf65f3c8871bcc95a3b4d5bcb5409d3df05c8273    
  
author   : Peter Eisentraut <peter@eisentraut.org>    
date     : Mon, 13 Jan 2020 13:27:39 +0100    
  
committer: Peter Eisentraut <peter@eisentraut.org>    
date     : Mon, 13 Jan 2020 13:27:39 +0100    

Click here for diff

The use of pg_atoi() for parsing a string into an Oid fails for values  
larger than INT32_MAX, since OIDs are unsigned.  Instead, use  
atooid().  While this has less error checking, the contents of the  
data directory are expected to be trustworthy, so we don't need to go  
out of our way to do full error checking.  
  
Discussion: https://www.postgresql.org/message-id/flat/dea47fc8-6c89-a2b1-07e3-754ff1ab094b%402ndquadrant.com  

M src/backend/replication/basebackup.c

Fix typo.

commit   : 52bc730381420a8fd9a92e633e217c8ca8c3a54b    
  
author   : Amit Kapila <akapila@postgresql.org>    
date     : Mon, 13 Jan 2020 14:44:55 +0530    
  
committer: Amit Kapila <akapila@postgresql.org>    
date     : Mon, 13 Jan 2020 14:44:55 +0530    

Click here for diff

Reported-by: Antonin Houska  
Author: Antonin Houska  
Backpatch-through: 11, where it was introduced  
Discussion: https://postgr.es/m/2246.1578900133@antos  

M src/include/access/session.h

Fix edge-case crashes and misestimation in range containment selectivity.

commit   : 70c17a81278c7d727ae5096fbb561bdd58eaadd0    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sun, 12 Jan 2020 14:37:00 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sun, 12 Jan 2020 14:37:00 -0500    

Click here for diff

When estimating the selectivity of "range_var <@ range_constant" or  
"range_var @> range_constant", if the upper (or respectively lower)  
bound of the range_constant was above the last bin of the range_var's  
histogram, the code would access uninitialized memory and potentially  
crash (though it seems the probability of a crash is quite low).  
Handle the endpoint cases explicitly to fix that.  
  
While at it, be more paranoid about the possibility of getting NaN  
or other silly results from the range type's subdiff function.  
And improve some comments.  
  
Ordinarily we'd probably add a regression test case demonstrating  
the bug in unpatched code.  But it's too hard to get it to crash  
reliably because of the uninitialized-memory dependence, so skip that.  
  
Per bug #16122 from Adam Scott.  It's been broken from the beginning,  
apparently, so backpatch to all supported branches.  
  
Diagnosis by Michael Paquier, patch by Andrey Borodin and Tom Lane.  
  
Discussion: https://postgr.es/m/16122-eb35bc248c806c15@postgresql.org  

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

Remove incorrect assertion for INSERT in logical replication's publisher

commit   : 7c21a964ef8a3b51f1fe0571054343ac0941008e    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Sun, 12 Jan 2020 22:44:59 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Sun, 12 Jan 2020 22:44:59 +0900    

Click here for diff

On the publisher, it was assumed that an INSERT change cannot happen for  
a relation with no replica identity.  However this is true only for a  
change that needs references to old rows, aka UPDATE or DELETE, so  
trying to use logical replication with a relation that has no replica  
identity led to an assertion failure in the publisher when issuing an  
INSERT.  This commit removes the incorrect assertion, and adds more  
regression tests to provide coverage for relations without replica  
identity.  
  
Reported-by: Neha Sharma  
Author: Dilip Kumar, Michael Paquier  
Reviewed-by: Andres Freund  
Discussion: https://postgr.es/m/CANiYTQsL1Hb8_Km08qd32svrqNumXLJeoGo014O7VZymgOhZEA@mail.gmail.com  
Backpatch-through: 10  

M src/backend/replication/logical/proto.c
M src/test/subscription/t/001_rep_changes.pl

Extensive code review for GSSAPI encryption mechanism.

commit   : fde155424f6779b009f8f01a71af8dd6176a0c81    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sat, 11 Jan 2020 17:14:08 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sat, 11 Jan 2020 17:14:08 -0500    

Click here for diff

Fix assorted bugs in handling of non-blocking I/O when using GSSAPI  
encryption.  The encryption layer could return the wrong status  
information to its caller, resulting in effectively dropping some data  
(or possibly in aborting a not-broken connection), or in a "livelock"  
situation where data remains to be sent but the upper layers think  
transmission is done and just go to sleep.  There were multiple small  
thinkos contributing to that, as well as one big one (failure to think  
through what to do when a send fails after having already transmitted  
data).  Note that these errors could cause failures whether the client  
application asked for non-blocking I/O or not, since both libpq and  
the backend always run things in non-block mode at this level.  
  
Also get rid of use of static variables for GSSAPI inside libpq;  
that's entirely not okay given that multiple connections could be  
open at once inside a single client process.  
  
Also adjust a bunch of random small discrepancies between the frontend  
and backend versions of the send/receive functions -- except for error  
handling, they should be identical, and now they are.  
  
Also extend the Kerberos TAP tests to exercise cases where nontrivial  
amounts of data need to be pushed through encryption.  Before, those  
tests didn't provide any useful coverage at all for the cases of  
interest here.  (They still might not, depending on timing, but at  
least there's a chance.)  
  
Per complaint from pmc@citylink and subsequent investigation.  
Back-patch to v12 where this code was introduced.  
  
Discussion: https://postgr.es/m/20200109181822.GA74698@gate.oper.dinoex.org  

M src/backend/libpq/be-secure-gssapi.c
M src/interfaces/libpq/fe-connect.c
M src/interfaces/libpq/fe-secure-gssapi.c
M src/interfaces/libpq/libpq-int.h
M src/test/kerberos/t/001_auth.pl

Maintain valid md.c state when FileClose() fails.

commit   : 93078e63f77979df3752e8ef5392dd384117e0ef    
  
author   : Noah Misch <noah@leadboat.com>    
date     : Fri, 10 Jan 2020 18:31:22 -0800    
  
committer: Noah Misch <noah@leadboat.com>    
date     : Fri, 10 Jan 2020 18:31:22 -0800    

Click here for diff

FileClose() failure ordinarily causes a PANIC.  Suppose the user  
disables that PANIC via data_sync_retry=on.  After mdclose() issued a  
FileClose() that failed, calls into md.c raised SIGSEGV.  This fix adds  
repalloc() calls during mdclose(); update a comment about ignoring  
repalloc() cost.  The rate of relation segment count change is a minor  
factor; more relevant to overall performance is the rate of mdclose()  
and subsequent re-opening of segments.  Back-patch to v10, where commit  
45e191e3aa62d47a8bc1a33f784286b2051f45cb introduced the bug.  
  
Reviewed by Kyotaro Horiguchi.  
  
Discussion: https://postgr.es/m/20191222091930.GA1280238@rfd.leadboat.com  

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

doc: Fix naming of SELinux

commit   : 2e89a1248db51bebd01f41011d439cdf9832eca8    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Fri, 10 Jan 2020 09:37:16 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Fri, 10 Jan 2020 09:37:16 +0900    

Click here for diff

Reported-by: Tham Nguyen  
Discussion: https://postgr.es/m/157851402876.29175.12977878383183540468@wrigleys.postgresql.org  
Backpatch-through: 9.4  

M doc/src/sgml/ref/security_label.sgml
M src/test/modules/dummy_seclabel/README

commit   : e05a3b490a258293c017bd107813c2d78813fab0    
  
author   : Peter Eisentraut <peter@eisentraut.org>    
date     : Thu, 9 Jan 2020 16:02:23 +0100    
  
committer: Peter Eisentraut <peter@eisentraut.org>    
date     : Thu, 9 Jan 2020 16:02:23 +0100    

Click here for diff

Author: Vik Fearing <vik.fearing@2ndquadrant.com>  
Discussion: https://www.postgresql.org/message-id/flat/54c208b9-7e2c-6211-0ba0-ffb0429cf20b@2ndquadrant.com  

M doc/src/sgml/release-12.sgml

Reimplement nullification of walsender timestamp

commit   : 20c4df8c8d7c54e34e921e770b594582d276f19e    
  
author   : Alvaro Herrera <alvherre@alvh.no-ip.org>    
date     : Wed, 8 Jan 2020 14:33:49 -0300    
  
committer: Alvaro Herrera <alvherre@alvh.no-ip.org>    
date     : Wed, 8 Jan 2020 14:33:49 -0300    

Click here for diff

Make the value null only at pg_stat_activity-output time, as suggested  
by Tom Lane, instead of messing with the internal state.  This should  
appease buildfarm members with force_parallel_mode=regress, which are  
running parallel queries on logical replication walsenders.  
  
The fact that walsenders can run parallel queries should perhaps be  
studied more carefully, but for the moment let's get rid of the red  
blots in buildfarm.  
  
Backpatch to pg10, like the previous commit.  
  
Discussion: https://postgr.es/m/30804.1578438763@sss.pgh.pa.us  

M src/backend/access/transam/xact.c
M src/backend/utils/adt/pgstatfuncs.c

Fix handling of generated columns in ALTER TABLE.

commit   : c24f3b70efc243bb44a6a4121032f19e2d6e813e    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 8 Jan 2020 09:42:53 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 8 Jan 2020 09:42:53 -0500    

Click here for diff

ALTER TABLE failed if a column referenced in a GENERATED expression  
had been added or changed in type earlier in the ALTER command.  
That's because the GENERATED expression needs to be evaluated  
against the table's updated tuples, but it was being evaluated  
against the original tuples.  (Fortunately the executor has adequate  
cross-checks to notice the mismatch, so we just got an obscure error  
message and not anything more dangerous.)  
  
Per report from Andreas Joseph Krogh.  Back-patch to v12 where  
GENERATED was added.  
  
Discussion: https://postgr.es/m/VisenaEmail.200.231b0a41523275d0.16ea7f800c7@tc7-visena  

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

Revert "Forbid DROP SCHEMA on temporary namespaces"

commit   : a1c003e5ff82f3dc9fc4bf7a32706e53ae6373bf    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Wed, 8 Jan 2020 10:36:22 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Wed, 8 Jan 2020 10:36:22 +0900    

Click here for diff

This reverts commit a052f6c, following complains from Robert Haas and  
Tom Lane.  Backpatch down to 9.4, like the previous commit.  
  
Discussion: https://postgr.es/m/CA+TgmobL4npEX5=E5h=5Jm_9mZun3MT39Kq2suJFVeamc9skSQ@mail.gmail.com  
Backpatch-through: 9.4  

M src/backend/commands/dropcmds.c

pg_stat_activity: show NULL stmt start time for walsenders

commit   : fce9ba8192b48d7b4a57a19d92044c4f378a41a0    
  
author   : Alvaro Herrera <alvherre@alvh.no-ip.org>    
date     : Tue, 7 Jan 2020 17:38:48 -0300    
  
committer: Alvaro Herrera <alvherre@alvh.no-ip.org>    
date     : Tue, 7 Jan 2020 17:38:48 -0300    

Click here for diff

Returning a non-NULL time is pointless, sinc a walsender is not a  
process that would be running normal transactions anyway, but the code  
was unintentionally exposing the process start time intermittently,  
which was not only bogus but it also confused monitoring systems looking  
for idle transactions.  Fix by avoiding all updates in walsenders.  
  
Backpatch to 11, where walsenders started appearing in pg_stat_activity.  
  
Reported-by: Tomas Vondra  
Discussion: https://postgr.es/m/20191209234409.exe7osmyalwkt5j4@development  

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

Reduce the number of GetFlushRecPtr() calls done by walsenders.

commit   : b89845267a6b0197e86b5a189d26f90f6a45c05f    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 6 Jan 2020 16:42:20 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 6 Jan 2020 16:42:20 -0500    

Click here for diff

Since the WAL flush position only moves forward, it's safe to cache  
its previous value within each walsender process, and update from  
shared memory only once we've caught up to the previously-seen value.  
When there are many active walsenders, this makes for a very significant  
reduction in the amount of contention on the XLogCtl->info_lck spinlock.  
  
This patch also adjusts the logic so that we update our idea of the  
flush position after processing a WAL record, rather than beforehand.  
This may cause us to realize we're not caught up when the preceding  
coding would've thought that we were, but that seems all to the good;  
it may avoid a useless sleep-and-wakeup cycle.  
  
Back-patch to v12.  The contention problem exists in prior branches,  
but it's much less severe (due to inefficiencies elsewhere) so there  
seems no need to take any risk of back-patching further.  
  
Pierre Ducroquet, reviewed by Julien Rouhaud  
  
Discussion: https://postgr.es/m/2931018.Vxl9zapr77@pierred-pdoc  

M src/backend/replication/walsender.c

Have logical replication subscriber fire column triggers

commit   : 8c2bfd9f9b5da06a60ef7d46565bff2eaf5ceb2c    
  
author   : Peter Eisentraut <peter@eisentraut.org>    
date     : Mon, 6 Jan 2020 08:21:14 +0100    
  
committer: Peter Eisentraut <peter@eisentraut.org>    
date     : Mon, 6 Jan 2020 08:21:14 +0100    

Click here for diff

The logical replication apply worker did not fire per-column update  
triggers because the updatedCols bitmap in the RTE was not populated.  
This fixes that.  
  
Reviewed-by: Euler Taveira <euler@timbira.com.br>  
Discussion: https://www.postgresql.org/message-id/flat/21673e2d-597c-6afe-637e-e8b10425b240%402ndquadrant.com  

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

Docs: use more standard terminology "round-to-nearest-even" instead of "round-to-even".

commit   : 6c1860b4d32082c411dd012bda4dfde35c41e942    
  
author   : Tatsuo Ishii <ishii@postgresql.org>    
date     : Sun, 5 Jan 2020 19:50:27 +0900    
  
committer: Tatsuo Ishii <ishii@postgresql.org>    
date     : Sun, 5 Jan 2020 19:50:27 +0900    

Click here for diff

Per suggestion from Tom Lane.  
Discussion: https://postgr.es/m/flat/20191230.093451.1762483750956466101.t-ishii%40sraoss.co.jp  

M doc/src/sgml/datatype.sgml

Fix typos in parallel query docs.

commit   : 0c8836ab49b17c493dd4344f582935f04acea326    
  
author   : Amit Kapila <akapila@postgresql.org>    
date     : Fri, 3 Jan 2020 10:52:46 +0530    
  
committer: Amit Kapila <akapila@postgresql.org>    
date     : Fri, 3 Jan 2020 10:52:46 +0530    

Click here for diff

Reported-by: Jon Jensen  
Author: Jon Jensen  
Reviewed-by: Amit Kapila and Robert Haas  
Backpatch-through: 10  
Discussion: https://postgr.es/m/nycvar.YSQ.7.76.1912301807510.9899@ybpnyubfg  

M doc/src/sgml/parallel.sgml

Fix cloning of row triggers to sub-partitions

commit   : d732148398a6e406170383ab21960ac373cd1316    
  
author   : Alvaro Herrera <alvherre@alvh.no-ip.org>    
date     : Thu, 2 Jan 2020 17:04:24 -0300    
  
committer: Alvaro Herrera <alvherre@alvh.no-ip.org>    
date     : Thu, 2 Jan 2020 17:04:24 -0300    

Click here for diff

When row triggers exist in partitioned partitions that are not either  
part of FKs or deferred unique constraints, they are not correctly  
cloned to their partitions.  That's because they are marked "internal",  
and those are purposefully skipped when doing the clone triggers dance.  
Fix by relaxing the condition on which internal triggers are skipped.  
  
Amit Langote initially diagnosed the problem and proposed a fix, but I  
used a different approach.  
  
Reported-by: Petr Fedorov  
Discussion: https://postgr.es/m/6b3f0646-ba8c-b3a9-c62d-1c6651a1920f@phystech.edu  

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

Fix comment in test

commit   : 98b75c38c6ed2701c278316daac744222a1d56dd    
  
author   : Peter Eisentraut <peter@eisentraut.org>    
date     : Thu, 2 Jan 2020 14:40:18 +0100    
  
committer: Peter Eisentraut <peter@eisentraut.org>    
date     : Thu, 2 Jan 2020 14:40:18 +0100    

Click here for diff

The comment was apparently copy-and-pasted and did not reflect the  
actual test outcome.  

M src/test/regress/expected/alter_generic.out
M src/test/regress/sql/alter_generic.sql

Fix running out of file descriptors for spill files.

commit   : f8a6d8e71b177578c4dce78dcf66293c71917844    
  
author   : Amit Kapila <akapila@postgresql.org>    
date     : Thu, 2 Jan 2020 10:40:32 +0530    
  
committer: Amit Kapila <akapila@postgresql.org>    
date     : Thu, 2 Jan 2020 10:40:32 +0530    

Click here for diff

Currently while decoding changes, if the number of changes exceeds a  
certain threshold, we spill those to disk.  And this happens for each  
(sub)transaction.  Now, while reading all these files, we don't close them  
until we read all the files.  While reading these files, if the number of  
such files exceeds the maximum number of file descriptors, the operation  
errors out.  
  
Use PathNameOpenFile interface to open these files as that internally has  
the mechanism to release kernel FDs as needed to get us under the  
max_safe_fds limit.  
  
Reported-by: Amit Khandekar  
Author: Amit Khandekar  
Reviewed-by: Amit Kapila  
Backpatch-through: 9.4  
Discussion: https://postgr.es/m/CAJ3gD9c-sECEn79zXw4yBnBdOttacoE-6gAyP0oy60nfs_sabQ@mail.gmail.com  

M src/backend/replication/logical/reorderbuffer.c
M src/test/recovery/t/006_logical_decoding.pl

Update copyrights for 2020

commit   : 8f3e44a1649e79718da65cd8883d481b329a02a7    
  
author   : Bruce Momjian <bruce@momjian.us>    
date     : Wed, 1 Jan 2020 12:21:45 -0500    
  
committer: Bruce Momjian <bruce@momjian.us>    
date     : Wed, 1 Jan 2020 12:21:45 -0500    

Click here for diff

Backpatch-through: update all files in master, backpatch legal files through 9.4  

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

Add pg_dump test for triggers on partitioned tables

commit   : b4507a22fed9c2398895d1d4b94815ad1a053bb0    
  
author   : Alvaro Herrera <alvherre@alvh.no-ip.org>    
date     : Fri, 27 Dec 2019 18:34:30 -0300    
  
committer: Alvaro Herrera <alvherre@alvh.no-ip.org>    
date     : Fri, 27 Dec 2019 18:34:30 -0300    

Click here for diff

This currently works, but add this test to ensure it continues to work.  
Lack of this test became evident after a recent bugfix submission that  
would have inadvertently broken it, in  
https://postgr.es/m/CA+HiwqFM2=i+uHB9o4OkLbE2S3sjPHoVe2wXuAD1GLJ4+Pk9eg@mail.gmail.com  

M src/bin/pg_dump/t/002_pg_dump.pl

doc: add examples of creative use of unique expression indexes

commit   : 2034bcc845f228c675c218e1928cf5337e74381d    
  
author   : Bruce Momjian <bruce@momjian.us>    
date     : Fri, 27 Dec 2019 14:49:08 -0500    
  
committer: Bruce Momjian <bruce@momjian.us>    
date     : Fri, 27 Dec 2019 14:49:08 -0500    

Click here for diff

Unique expression indexes can constrain data in creative ways, so show  
two examples.  
  
Reported-by: Tuomas Leikola  
  
Discussion: https://postgr.es/m/156760275564.1127.12321702656456074572@wrigleys.postgresql.org  
  
Backpatch-through: 9.4  

M doc/src/sgml/indices.sgml

docs: clarify infinite range values from data-type infinities

commit   : 5d72f85d4ca8e0a56836ea48576ff8f684f7dce7    
  
author   : Bruce Momjian <bruce@momjian.us>    
date     : Fri, 27 Dec 2019 14:33:30 -0500    
  
committer: Bruce Momjian <bruce@momjian.us>    
date     : Fri, 27 Dec 2019 14:33:30 -0500    

Click here for diff

The previous docs referenced these distinct ideas confusingly.  
  
Reported-by: Eugen Konkov  
  
Discussion: https://postgr.es/m/376945611.20191026161529@yandex.ru  
  
Backpatch-through: 9.4  

M doc/src/sgml/rangetypes.sgml

Forbid DROP SCHEMA on temporary namespaces

commit   : 1dd88201ad6e7eea9c9fff9077f3577dbe7458cd    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Fri, 27 Dec 2019 17:59:12 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Fri, 27 Dec 2019 17:59:12 +0900    

Click here for diff

This operation was possible for the owner of the schema or a superuser.  
Down to 9.4, doing this operation would cause inconsistencies in a  
session whose temporary schema was dropped, particularly if trying to  
create new temporary objects after the drop.  A more annoying  
consequence is a crash of autovacuum on an assertion failure when  
logging information about an orphaned temp table dropped.  Note that  
because of 246a6c8 (present in v11~), which has made the removal of  
orphaned temporary tables more aggressive, the failure could be  
triggered more easily, but it is possible to reproduce down to 9.4.  
  
Reported-by: Mahendra Singh, Prabhat Sahu  
Author: Michael Paquier  
Reviewed-by: Kyotaro Horiguchi, Mahendra Singh  
Discussion: https://postgr.es/m/CAKYtNAr9Zq=1-ww4etHo-VCC-k120YxZy5OS01VkaLPaDbv2tg@mail.gmail.com  
Backpatch-through: 9.4  

M src/backend/commands/dropcmds.c

Fix possible loss of sync between rectypeid and underlying PLpgSQL_type.

commit   : 883c27a1cf9b80d9a1cf13f527ad21024fa1849d    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 26 Dec 2019 15:19:39 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 26 Dec 2019 15:19:39 -0500    

Click here for diff

When revalidate_rectypeid() acts to update a stale record type OID  
in plpgsql's data structures, it fixes the active PLpgSQL_rec struct  
as well as the PLpgSQL_type struct it references.  However, the latter  
is shared across function executions while the former is not.  In a  
later function execution, the PLpgSQL_rec struct would be reinitialized  
by copy_plpgsql_datums and would then contain a stale type OID,  
typically leading to "could not open relation with OID NNNN" errors.  
revalidate_rectypeid() can easily fix this, fortunately, just by  
treating typ->typoid as authoritative.  
  
Per report and diagnosis from Ashutosh Sharma, though this is not his  
suggested fix.  Back-patch to v11 where this code came in.  
  
Discussion: https://postgr.es/m/CAE9k0Pkd4dZwt9J5pS9xhJFWpUtqs05C9xk_GEwPzYdV=GxwWg@mail.gmail.com  

M src/pl/plpgsql/src/expected/plpgsql_record.out
M src/pl/plpgsql/src/pl_exec.c
M src/pl/plpgsql/src/sql/plpgsql_record.sql

commit   : 50fa688f303024447fa8b2419a733b551f752769    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Thu, 26 Dec 2019 22:26:26 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Thu, 26 Dec 2019 22:26:26 +0900    

Click here for diff

confirmed_flush is part of a replication slot's information, but not  
confirmed_lsn.  
  
Author: Kyotaro Horiguchi  
Discussion: https://postgr.es/m/20191226.175919.17237335658671970.horikyota.ntt@gmail.com  
Backpatch-through: 11  

M src/backend/replication/slotfuncs.c

Rotate instead of shifting hash join batch number.

commit   : 8052aaf521e4885477bd1af100edcf21031e6d11    
  
author   : Thomas Munro <tmunro@postgresql.org>    
date     : Tue, 24 Dec 2019 11:31:24 +1300    
  
committer: Thomas Munro <tmunro@postgresql.org>    
date     : Tue, 24 Dec 2019 11:31:24 +1300    

Click here for diff

Our algorithm for choosing batch numbers turned out not to work  
effectively for multi-billion key inner relations.  We would use  
more hash bits than we have, and effectively concentrate all tuples  
into a smaller number of batches than we intended.  While ideally  
we should switch to wider hashes, for now, change the algorithm to  
one that effectively gives up bits from the bucket number when we  
don't have enough bits.  That means we'll finish up with longer  
bucket chains than would be ideal, but that's better than having  
batches that don't fit in work_mem and can't be divided.  
  
Batch-patch to all supported releases.  
  
Author: Thomas Munro  
Reviewed-by: Tom Lane, thanks also to Tomas Vondra, Alvaro Herrera, Andres Freund for testing and discussion  
Reported-by: James Coleman  
Discussion: https://postgr.es/m/16104-dc11ed911f1ab9df%40postgresql.org  

M src/backend/executor/nodeHash.c
M src/include/port/pg_bitutils.h

Disallow null category in crosstab_hash

commit   : b5e7569dddd2ef8b3d84b528be916647e7465c12    
  
author   : Joe Conway <mail@joeconway.com>    
date     : Mon, 23 Dec 2019 13:33:34 -0500    
  
committer: Joe Conway <mail@joeconway.com>    
date     : Mon, 23 Dec 2019 13:33:34 -0500    

Click here for diff

While building a hash map of categories in load_categories_hash,  
resulting category names have not thus far been checked to ensure  
they are not null. Prior to pg12 null category names worked to the  
extent that they did not crash on some platforms. This is because  
those system libraries have an snprintf which can deal with being  
passed a null pointer argument for a string. But even in those cases  
null categories did nothing useful. And on some platforms it crashed.  
As of pg12, our own version of snprintf gets called, and it does  
not deal with null pointer arguments at all, and crashes consistently.  
  
Fix that by disallowing null categories. They never worked usefully,  
and no one has ever asked for them to work previously. Back-patch to  
all supported branches.  
  
Reported-By: Ireneusz Pluta  
Discussion: https://postgr.es/m/16176-7489719b05e4303c@postgresql.org  

M contrib/tablefunc/tablefunc.c

Disallow partition key expressions that return pseudo-types.

commit   : 7fbb39a967ea7fa32915407ea87eee1d5f38d9e7    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 23 Dec 2019 12:53:13 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 23 Dec 2019 12:53:13 -0500    

Click here for diff

This wasn't checked originally, but it should have been, because  
in general pseudo-types can't be stored to and retrieved from disk.  
Notably, partition bound values of type "record" would not be  
interpretable by another session.  
  
In v12 and HEAD, add another flag to CheckAttributeType's repertoire  
so that it can produce a specific error message for this case.  That's  
infeasible in older branches without an ABI break, so fall back to  
a slightly-less-nicely-worded error message in v10 and v11.  
  
Problem noted by Amit Langote, though this patch is not his initial  
solution.  Back-patch to v10 where partitioning was introduced.  
  
Discussion: https://postgr.es/m/CA+HiwqFUzjfj9HEsJtYWcr1SgQ_=iCAvQ=O2Sx6aQxoDu4OiHw@mail.gmail.com  

M src/backend/catalog/heap.c
M src/backend/commands/tablecmds.c
M src/include/catalog/heap.h
M src/test/regress/expected/create_table.out
M src/test/regress/sql/create_table.sql

Prevent a rowtype from being included in itself via a range.

commit   : 976cb11f6c58b8807455982ae7344b72ea2cd1ab    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 23 Dec 2019 12:08:23 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 23 Dec 2019 12:08:23 -0500    

Click here for diff

We probably should have thought of this case when ranges were added,  
but we didn't.  (It's not the fault of commit eb51af71f, because  
ranges didn't exist then.)  
  
It's an old bug, so back-patch to all supported branches.  
  
Discussion: https://postgr.es/m/7782.1577051475@sss.pgh.pa.us  

M src/backend/catalog/heap.c
M src/test/regress/expected/rangetypes.out
M src/test/regress/sql/rangetypes.sql

Avoid low-probability regression test failures in timestamp[tz] tests.

commit   : e1c056cc4d7bcc0dfe8a3808550e7b7f73b64643    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sun, 22 Dec 2019 18:00:17 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sun, 22 Dec 2019 18:00:17 -0500    

Click here for diff

If the first transaction block in these tests were entered exactly  
at midnight (California time), they'd report a bogus failure due  
to 'now' and 'midnight' having the same values.  Commit 8c2ac75c5  
had dismissed this as being of negligible probability, but we've  
now seen it happen in the buildfarm, so let's prevent it.  We can  
get pretty much the same test coverage without an it's-not-midnight  
assumption by moving the does-'now'-work cases into their own test step.  
  
While here, apply commit 47169c255's s/DELETE/TRUNCATE/ change to  
timestamptz as well as timestamp (not sure why that didn't  
occur to me at the time; the risk of failure is the same).  
  
Back-patch to all supported branches, since the main point is  
to get rid of potential buildfarm failures.  
  
Discussion: https://postgr.es/m/14821.1577031117@sss.pgh.pa.us  

M src/test/regress/expected/timestamp.out
M src/test/regress/expected/timestamptz.out
M src/test/regress/sql/timestamp.sql
M src/test/regress/sql/timestamptz.sql

In pgwin32_open, loop after ERROR_ACCESS_DENIED only if we can't stat.

commit   : 90281a3a28a7ab9fcf83f471c1ef714f8d96fd1c    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sat, 21 Dec 2019 17:39:36 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sat, 21 Dec 2019 17:39:36 -0500    

Click here for diff

This fixes a performance problem introduced by commit 6d7547c21.  
ERROR_ACCESS_DENIED is returned in some other cases besides the  
delete-pending case considered by that commit; notably, if the  
given path names a directory instead of a plain file.  In that  
case we'll uselessly loop for 1 second before returning the  
failure condition.  That slows down some usage scenarios enough  
to cause test timeout failures on our Windows buildfarm critters.  
  
To fix, try to stat() the file, and sleep/loop only if that fails.  
It will fail in the delete-pending case, and also in the case where  
the deletion completed before we could stat(), so we have the cases  
where we want to loop covered.  In the directory case, the stat()  
should succeed, letting us exit without a wait.  
  
One case where we'll still wait uselessly is if the access-denied  
problem pertains to a directory in the given pathname.  But we don't  
expect that to happen in any performance-critical code path.  
  
There might be room to refine this further, but I'll push it now  
in hopes of making the buildfarm green again.  
  
Back-patch, like the preceding commit.  
  
Alexander Lakhin and Tom Lane  
  
Discussion: https://postgr.es/m/23073.1576626626@sss.pgh.pa.us  

M src/port/open.c

docs: clarify handling of column lists in COPY TO/FROM

commit   : 96aa9b60896def1e6c2a1dd127498e58c53361cf    
  
author   : Bruce Momjian <bruce@momjian.us>    
date     : Sat, 21 Dec 2019 12:44:38 -0500    
  
committer: Bruce Momjian <bruce@momjian.us>    
date     : Sat, 21 Dec 2019 12:44:38 -0500    

Click here for diff

Previously it was unclear how COPY FROM handled cases where not all  
columns were specified, or if the order didn't match.  
  
Reported-by: pavlo.golub@gmail.com  
  
Discussion: https://postgr.es/m/157487729344.7213.14245726713444755296@wrigleys.postgresql.org  
  
Backpatch-through: 9.4  

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

commit   : e8f60e6fe206b4877c5b0d0b70015e672de04f60    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 20 Dec 2019 15:34:07 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 20 Dec 2019 15:34:07 -0500    

Click here for diff

We realized years ago that it's better for libpq to accept all  
connection parameters syntactically, even if some are ignored or  
restricted due to lack of the feature in a particular build.  
However, that lesson from the SSL support was for some reason never  
applied to the GSSAPI support.  This is causing various buildfarm  
members to have problems with a test case added by commit 6136e94dc,  
and it's just a bad idea from a user-experience standpoint anyway,  
so fix it.  
  
While at it, fix some places where parameter-related infrastructure  
was added with the aid of a dartboard, or perhaps with the aid of  
the anti-pattern "add new stuff at the end".  It should be safe  
to rearrange the contents of struct pg_conn even in released  
branches, since that's private to libpq (and we'd have to move  
some fields in some builds to fix this, anyway).  
  
Back-patch to all supported branches.  
  
Discussion: https://postgr.es/m/11297.1576868677@sss.pgh.pa.us  

M contrib/postgres_fdw/expected/postgres_fdw.out
M contrib/postgres_fdw/sql/postgres_fdw.sql
M doc/src/sgml/libpq.sgml
M src/interfaces/libpq/fe-connect.c
M src/interfaces/libpq/libpq-int.h

Doc: add a short summary of available authentication methods.

commit   : e5a37d958decfbc9dc650e66775db5896b7486ff    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 19 Dec 2019 09:42:46 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 19 Dec 2019 09:42:46 -0500    

Click here for diff

The "auth-methods" <sect1> used to include descriptions of all our  
authentication methods.  Commit 56811e573 promoted its child <sect2>'s  
to <sect1>'s, which has advantages but also created some issues:  
* The auth-methods page itself is essentially empty/useless.  
* Links that pointed to "auth-methods" as a placeholder for all  
auth methods were rendered a bit nonsensical.  
* DocBook no longer provides a subsection table-of-contents here,  
which formerly was a useful if terse summary of available auth methods.  
  
To improve matters, add a handwritten list of all the auth methods.  
  
Per gripe from Dave Cramer.  Back-patch to v11 where the previous  
commit came in.  
  
Discussion: https://postgr.es/m/CADK3HH+xQLhcPgg=kWqfogtXGGZr-JdSo=x=WQC0PkAVyxUWyQ@mail.gmail.com  

M doc/src/sgml/client-auth.sgml

Update neglected comment.

commit   : a9f304f5362f18b88fab04f342c99bd3d2c37944    
  
author   : Robert Haas <rhaas@postgresql.org>    
date     : Thu, 19 Dec 2019 09:24:44 -0500    
  
committer: Robert Haas <rhaas@postgresql.org>    
date     : Thu, 19 Dec 2019 09:24:44 -0500    

Click here for diff

Commit d986d4e87f61c68f52c68ebc274960dc664b7b4e renamed a variable  
but neglected to update the corresponding comment.  
  
Amit Langote  

M src/backend/commands/trigger.c

Fix subscriber invalid memory access on DDL.

commit   : c74111d8bd6853b9944d004706dcc0cea2f2a25a    
  
author   : Amit Kapila <akapila@postgresql.org>    
date     : Mon, 16 Dec 2019 15:23:46 +0530    
  
committer: Amit Kapila <akapila@postgresql.org>    
date     : Mon, 16 Dec 2019 15:23:46 +0530    

Click here for diff

This patch allows building the local relmap cache for a subscribed  
relation after processing pending invalidation messages and potential  
relcache updates.  Without this, the attributes in the local cache don't  
tally with the updated relcache entry leading to invalid memory access.  
  
Reported-by Jehan-Guillaume de Rorthais  
Author: Jehan-Guillaume de Rorthais and Vignesh C  
Reviewed-by: Amit Kapila  
Backpatch-through: 10  
Discussion: https://postgr.es/m/20191025175929.7e90dbf5@firost  

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

Remove shadow variables linked to RedoRecPtr in xlog.c

commit   : 35c01529b8c9d8f168379639b4f37227d768d313    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Wed, 18 Dec 2019 10:11:31 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Wed, 18 Dec 2019 10:11:31 +0900    

Click here for diff

This changes the routines in charge of recycling WAL segments past the  
last redo LSN to not use anymore "RedoRecPtr" as a local variable, which  
is also available in the context of the session as a static declaration,  
replacing it with "lastredoptr".  This confusion has been introduced by  
d9fadbf, so backpatch down to v11 like the other commit.  
  
Thanks to Tom Lane, Robert Haas, Alvaro Herrera, Mark Dilger and Kyotaro  
Horiguchi for the input provided.  
  
Author: Ranier Vilela  
Discussion: https://postgr.es/m/MN2PR18MB2927F7B5F690065E1194B258E35D0@MN2PR18MB2927.namprd18.prod.outlook.com  
Backpatch-through: 11  

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

Fix error reporting for index expressions of prohibited types.

commit   : 97ba30fab51a19e06ae1cf74abed3ce748b2fa95    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 17 Dec 2019 17:44:28 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 17 Dec 2019 17:44:28 -0500    

Click here for diff

If CheckAttributeType() threw an error about the datatype of an  
index expression column, it would report an empty column name,  
which is pretty unhelpful and certainly not the intended behavior.  
I (tgl) evidently broke this in commit cfc5008a5, by not noticing  
that the column's attname was used above where I'd placed the  
assignment of it.  
  
In HEAD and v12, this is trivially fixable by moving up the  
assignment of attname.  Before v12 the code is a bit more messy;  
to avoid doing substantial refactoring, I took the lazy way out  
and just put in two copies of the assignment code.  
  
Report and patch by Amit Langote.  Back-patch to all supported  
branches.  
  
Discussion: https://postgr.es/m/CA+HiwqFA+BGyBFimjiYXXMa2Hc3fcL0+OJOyzUNjhU4NCa_XXw@mail.gmail.com  

M src/backend/catalog/index.c
M src/test/regress/expected/create_index.out
M src/test/regress/sql/create_index.sql

Change overly strict Assert in TransactionGroupUpdateXidStatus.

commit   : 0eac283bfc8b893d91a1ecf184d2c8373a1ed906    
  
author   : Amit Kapila <akapila@postgresql.org>    
date     : Thu, 12 Dec 2019 11:51:30 +0530    
  
committer: Amit Kapila <akapila@postgresql.org>    
date     : Thu, 12 Dec 2019 11:51:30 +0530    

Click here for diff

This Assert thought that an overflowed transaction can never get registered  
for the group update.  But that is not true, because even when the number  
of children for a transaction got reduced, the overflow flag is not  
changed.  And, for group update, we only care about the current number of  
children for a transaction that is being committed.  
  
Based on comments by Andres Freund, remove a redundant Assert in  
TransactionIdSetPageStatus as we already had a static Assert for the same  
condition a few lines earlier.  
  
Reported-by: Vignesh C  
Author: Dilip Kumar  
Reviewed-by: Amit Kapila  
Backpatch-through: 11  
Discussion: https://postgr.es/m/CAFiTN-s5=uJw-Z6JC9gcqtBSjXsrHnU63PXBrA=pnBjqnkm5UA@mail.gmail.com  

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

On Windows, wait a little to see if ERROR_ACCESS_DENIED goes away.

commit   : 95f43fee91793cbcfaf13636a5936a5184fdafe3    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 16 Dec 2019 15:10:55 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 16 Dec 2019 15:10:55 -0500    

Click here for diff

Attempting to open a file fails with ERROR_ACCESS_DENIED if the file  
is flagged for deletion but not yet actually gone (another in a long  
list of reasons why Windows is broken, if you ask me).  This seems  
likely to explain a lot of irreproducible failures we see in the  
buildfarm.  This state generally persists for only a millisecond or so,  
so just wait a bit and retry.  If it's a real permissions problem,  
we'll eventually give up and report it as such.  If it's the pending  
deletion case, we'll see file-not-found and report that after the  
deletion completes, and the caller will treat that in an appropriate  
way.  
  
In passing, rejigger the existing retry logic for some other error  
cases so that we don't uselessly wait an extra time when we're  
not going to retry anymore.  
  
Alexander Lakhin (with cosmetic tweaks by me).  Back-patch to all  
supported branches, since this seems like a pretty safe change and  
the problem is definitely real.  
  
Discussion: https://postgr.es/m/16161-7a985d2f1bbe8f71@postgresql.org  

M src/port/open.c

Fix yet another crash in page split during GiST index creation.

commit   : 42d1acd2edc4a02de63c7b3d2a18056d393e373d    
  
author   : Heikki Linnakangas <heikki.linnakangas@iki.fi>    
date     : Mon, 16 Dec 2019 13:57:41 +0200    
  
committer: Heikki Linnakangas <heikki.linnakangas@iki.fi>    
date     : Mon, 16 Dec 2019 13:57:41 +0200    

Click here for diff

Commit a7ee7c8513 fixed a bug in GiST page split during index creation,  
where we failed to re-find the position of a downlink after the page  
containing it was split. However, that fix was incomplete; the other call  
to gistinserttuples() in the same function needs to also clear  
'downlinkoffnum'.  
  
Fixes bug #16134 reported by Alexander Lakhin, for real this time. The  
previous fix was enough to fix the crash with the reproducer script for  
bug #16162, but the original script for #16134 was still crashing.  
  
Backpatch to v12, like the previous incomplete fix.  
  
Discussion: https://www.postgresql.org/message-id/d869f537-abe4-d2ea-0510-38cd053f5152%40gmail.com  

M src/backend/access/gist/gist.c

Clean up some misplaced comments in partition_join.sql regression test.

commit   : e3ac8939324d73c35e2fd0f846001eb02e3a7858    
  
author   : Etsuro Fujita <efujita@postgresql.org>    
date     : Mon, 16 Dec 2019 17:00:16 +0900    
  
committer: Etsuro Fujita <efujita@postgresql.org>    
date     : Mon, 16 Dec 2019 17:00:16 +0900    

Click here for diff

Also, add a comment explaining a test case.  
  
Back-patch to 11 where the regression test was added.  
  
Discussion: https://postgr.es/m/CAPmGK15adZPh2B%2BmGUjSOMH%2BH39ogDRWfCfm4G6jncZCAs9V_Q%40mail.gmail.com  

M src/test/regress/expected/partition_join.out
M src/test/regress/sql/partition_join.sql

Prevent overly-aggressive collapsing of joins to RTE_RESULT relations.

commit   : d04e2553d49d7478f6e869fcecea7d6ca9c6bd50    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sat, 14 Dec 2019 13:49:15 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sat, 14 Dec 2019 13:49:15 -0500    

Click here for diff

The RTE_RESULT simplification logic added by commit 4be058fe9 had a  
flaw: it would collapse out a RTE_RESULT that is due to compute a  
PlaceHolderVar, and reassign the PHV to the parent join level, even if  
another input relation of the join contained a lateral reference to  
the PHV.  That can't work because the PHV would be computed too late.  
In practice it led to failures of internal sanity checks later in  
planning (either assertion failures or errors such as "failed to  
construct the join relation").  
  
To fix, add code to check for the presence of such PHVs in relevant  
portions of the query tree.  Notably, this required refactoring  
range_table_walker so that a caller could ask to walk individual RTEs  
not the whole list.  (It might be a good idea to refactor  
range_table_mutator in the same way, if only to keep those functions  
looking similar; but I didn't do so here as it wasn't necessary for  
the bug fix.)  
  
This exercise also taught me that find_dependent_phvs(), as it stood,  
could only safely be used on the entire Query, not on subtrees.  
Adjust its API to reflect that; which in passing allows it to have  
a fast path for the common case of no PHVs anywhere.  
  
Per report from Will Leinweber.  Back-patch to v12 where the bug  
was introduced.  
  
Discussion: https://postgr.es/m/CALLb-4xJMd4GZt2YCecMC95H-PafuWNKcmps4HLRx2NHNBfB4g@mail.gmail.com  

M src/backend/nodes/nodeFuncs.c
M src/backend/optimizer/prep/prepjointree.c
M src/include/nodes/nodeFuncs.h
M src/test/regress/expected/join.out
M src/test/regress/sql/join.sql

Fix mdsyncfiletag(), take II.

commit   : fd005e1a87446ad61a6c950841b0a6f93bdfb594    
  
author   : Thomas Munro <tmunro@postgresql.org>    
date     : Sat, 14 Dec 2019 17:38:09 +1300    
  
committer: Thomas Munro <tmunro@postgresql.org>    
date     : Sat, 14 Dec 2019 17:38:09 +1300    

Click here for diff

The previous commit failed to consider that FileGetRawDesc() might  
not return a valid fd, as discovered on the build farm.  Switch to  
using the File interface only.  
  
Back-patch to 12, like the previous commit.  

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

Don't use _mdfd_getseg() in mdsyncfiletag().

commit   : c3dc0cdd6b58f6d4a632364554c9aec5b4f83f69    
  
author   : Thomas Munro <tmunro@postgresql.org>    
date     : Sat, 14 Dec 2019 15:54:31 +1300    
  
committer: Thomas Munro <tmunro@postgresql.org>    
date     : Sat, 14 Dec 2019 15:54:31 +1300    

Click here for diff

_mdfd_getseg() opens all segments up to the requested one.  That  
causes problems for mdsyncfiletag(), if mdunlinkfork() has  
already unlinked other segment files.  Open the file we want  
directly by name instead, if it's not already open.  
  
The consequence of this bug was a rare panic in the checkpointer,  
made more likely if you saturated the sync request queue so that  
the SYNC_FORGET_REQUEST messages for a given relation were more  
likely to be absorbed in separate cycles by the checkpointer.  
  
Back-patch to 12.  Defect in commit 3eb77eba.  
  
Author: Thomas Munro  
Reported-by: Justin Pryzby  
Discussion: https://postgr.es/m/20191119115759.GI30362%40telsasoft.com  

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

Fix crash when a page was split during GiST index creation.

commit   : 70c4f500eaeb2ccc3ed49764ee925482bd5c33e0    
  
author   : Heikki Linnakangas <heikki.linnakangas@iki.fi>    
date     : Fri, 13 Dec 2019 23:58:10 +0200    
  
committer: Heikki Linnakangas <heikki.linnakangas@iki.fi>    
date     : Fri, 13 Dec 2019 23:58:10 +0200    

Click here for diff

The bug was similar to the one that was fixed in commit 22251686f0. When  
we split page X and insert the downlink for the new page, the parent page  
might also need to be split. When that happens, the downlink offset number  
we remembered for X is no longer valid. We correctly called  
gistFindCorrectParent() to re-find it, but gistFindCorrectParent() doesn't  
do anything if the LSN of the page hasn't changed, and we stopped updating  
LSNs during index build in commit 9155580fd5. The buggy codepath was taken  
if the page was split into three or more pages, and inserting the downlink  
caused the parent page to split. To fix, explicitly mark the downlink  
offset number as invalid, to force gistFindCorrectParent() to re-find it.  
  
Fixes bug #16134 reported by Alexander Lakhin, reported again as #16162 by  
Andreas Kunert. Thanks to Jeff Janes, Tom Lane and Tomas Vondra for  
debugging. Backpatch to v12, where we stopped WAL-logging during index  
build.  
  
Discussion: https://www.postgresql.org/message-id/16134-0423f729671dec64%40postgresql.org  
Discussion: https://www.postgresql.org/message-id/16162-45d21b7b6c1a3105%40postgresql.org  

M src/backend/access/gist/gist.c

Fix EXTRACT(ISOYEAR FROM timestamp) for years BC.

commit   : 07c4b6ac7d6e467f9db681772b5d5101144fcfe7    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 12 Dec 2019 12:30:44 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 12 Dec 2019 12:30:44 -0500    

Click here for diff

The test cases added by commit 26ae3aa80 exposed an old oversight in  
timestamp[tz]_part: they didn't correct the result of date2isoyear()  
for BC years, so that we produced an off-by-one answer for such years.  
Fix that, and back-patch to all supported branches.  
  
Discussion: https://postgr.es/m/SG2PR06MB37762CAE45DB0F6CA7001EA9B6550@SG2PR06MB3776.apcprd06.prod.outlook.com  

M src/backend/utils/adt/timestamp.c
M src/test/regress/expected/timestamp.out
M src/test/regress/expected/timestamptz.out

Remove redundant function calls in timestamp[tz]_part().

commit   : 73355634959bc011508a24f0e344c6f6fddf419e    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 12 Dec 2019 12:12:35 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 12 Dec 2019 12:12:35 -0500    

Click here for diff

The DTK_DOW/DTK_ISODOW and DTK_DOY switch cases in timestamp_part() and  
timestamptz_part() contained calls of timestamp2tm() that were fully  
redundant with the ones done just above the switch.  This evidently crept  
in during commit 258ee1b63, which relocated that code from another place  
where the calls were indeed needed.  Just delete the redundant calls.  
  
I (tgl) noted that our test coverage of these functions left quite a  
bit to be desired, so extend timestamp.sql and timestamptz.sql to  
cover all the branches.  
  
Back-patch to all supported branches, as the previous commit was.  
There's no real issue here other than some wasted cycles in some  
not-too-heavily-used code paths, but the test coverage seems valuable.  
  
Report and patch by Li Japin; test case adjustments by me.  
  
Discussion: https://postgr.es/m/SG2PR06MB37762CAE45DB0F6CA7001EA9B6550@SG2PR06MB3776.apcprd06.prod.outlook.com  

M src/backend/utils/adt/timestamp.c
M src/test/regress/expected/timestamp.out
M src/test/regress/expected/timestamptz.out
M src/test/regress/sql/timestamp.sql
M src/test/regress/sql/timestamptz.sql

Remove extra parenthesis from comment.

commit   : 6a9b5a2f82cb8f7267d9e25093a643d47fd3fbb6    
  
author   : Etsuro Fujita <efujita@postgresql.org>    
date     : Thu, 12 Dec 2019 15:45:01 +0900    
  
committer: Etsuro Fujita <efujita@postgresql.org>    
date     : Thu, 12 Dec 2019 15:45:01 +0900    

Click here for diff

M src/backend/partitioning/partbounds.c

In pg_ctl, work around ERROR_SHARING_VIOLATION on the postmaster log file.

commit   : be9d4b9280606a0b0984ba46c452a48961cf92d4    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 10 Dec 2019 13:17:08 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 10 Dec 2019 13:17:08 -0500    

Click here for diff

On Windows, we use CMD.EXE to redirect the postmaster's stdout/stderr  
into a log file.  CMD.EXE will open that file with non-sharing-friendly  
parameters, and the file will remain open for a short time after the  
postmaster has removed postmaster.pid.  This can result in an  
ERROR_SHARING_VIOLATION failure if we attempt to start a new postmaster  
immediately with the same log file (e.g. during "pg_ctl restart").  
This seems to explain intermittent buildfarm failures we've been seeing  
on Windows machines.  
  
To fix, just open and close the log file using our own pgwin32_open(),  
which will wait if necessary to avoid the failure.  (Perhaps someday  
we should stop using CMD.EXE, but that would be a far more complex  
patch, and it doesn't seem worth the trouble ... yet.)  
  
Back-patch to v12.  This only solves the problem when frontend fopen()  
is redirected to pgwin32_fopen(), which has only been true since commit  
0ba06e0bf.  Hence, no point in back-patching further, unless we care  
to back-patch that change too.  
  
Diagnosis and patch by Alexander Lakhin (bug #16154).  
  
Discussion: https://postgr.es/m/16154-1ccf0b537b24d5e0@postgresql.org  

M src/bin/pg_ctl/pg_ctl.c

Fix handling of multiple AFTER ROW triggers on a foreign table.

commit   : 547e454cbc8f8896b535cf2debd61b2c5701d8c0    
  
author   : Etsuro Fujita <efujita@postgresql.org>    
date     : Tue, 10 Dec 2019 18:00:31 +0900    
  
committer: Etsuro Fujita <efujita@postgresql.org>    
date     : Tue, 10 Dec 2019 18:00:31 +0900    

Click here for diff

AfterTriggerExecute() retrieves a fresh tuple or pair of tuples from a  
tuplestore and then stores the tuple(s) in the passed-in slot(s) if  
AFTER_TRIGGER_FDW_FETCH, while it uses the most-recently-retrieved  
tuple(s) stored in the slot(s) if AFTER_TRIGGER_FDW_REUSE.  This was  
done correctly before 12, but commit ff11e7f4b broke it by mistakenly  
clearing the tuple(s) stored in the slot(s) in that function, leading to  
an assertion failure as reported in bug #16139 from Alexander Lakhin.  
  
Also, fix some other issues with the aforementioned commit in passing:  
  
* For tg_newslot, which is a slot added to the TriggerData struct by the  
  commit to store new updated tuples, it didn't ensure the slot was NULL  
  if there was no such tuple.  
* The commit failed to update the documentation about the trigger  
  interface.  
  
Author: Etsuro Fujita  
Backpatch-through: 12  
Discussion: https://postgr.es/m/16139-94f9ccf0db6119ec%40postgresql.org  

M contrib/postgres_fdw/expected/postgres_fdw.out
M contrib/postgres_fdw/sql/postgres_fdw.sql
M doc/src/sgml/trigger.sgml
M src/backend/commands/trigger.c

Fix race condition in our Windows signal emulation.

commit   : 001362cfdc94f992ff92df9353394160d7c5e13c    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 9 Dec 2019 15:03:51 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 9 Dec 2019 15:03:51 -0500    

Click here for diff

pg_signal_dispatch_thread() responded to the client (signal sender)  
and disconnected the pipe before actually setting the shared variables  
that make the signal visible to the backend process's main thread.  
In the worst case, it seems, effective delivery of the signal could be  
postponed for as long as the machine has any other work to do.  
  
To fix, just move the pg_queue_signal() call so that we do it before  
responding to the client.  This essentially makes pgkill() synchronous,  
which is a stronger guarantee than we have on Unix.  That may be  
overkill, but on the other hand we have not seen comparable timing bugs  
on any Unix platform.  
  
While at it, add some comments to this sadly underdocumented code.  
  
Problem diagnosis and fix by Amit Kapila; I just added the comments.  
  
Back-patch to all supported versions, as it appears that this can cause  
visible NOTIFY timing oddities on all of them, and there might be  
other misbehavior due to slow delivery of other signals.  
  
Discussion: https://postgr.es/m/32745.1575303812@sss.pgh.pa.us  

M src/backend/port/win32/signal.c

Improve isolationtester's timeout management.

commit   : eadfafda049e3081f8078aa30ea33f538c45aecd    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 9 Dec 2019 14:31:57 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Mon, 9 Dec 2019 14:31:57 -0500    

Click here for diff

isolationtester.c had a hard-wired limit of 3 minutes per test step.  
It now emerges that this isn't quite enough for some of the slowest  
buildfarm animals.  This isn't the first time we've had to raise  
this limit (cf. 1db439ad4), so let's make it configurable.  This  
patch raises the default to 5 minutes, and introduces an environment  
variable PGISOLATIONTIMEOUT that can be set if more time is needed,  
following the precedent of PGCTLTIMEOUT.  
  
Also, modify isolationtester so that when the timeout is hit,  
it explicitly reports having sent a cancel.  This makes the regression  
failure log considerably more intelligible.  (In the worst case, a  
timed-out test might actually be reported as "passing" without this  
extra output, so arguably this is a bug fix in itself.)  
  
In passing, update the README file, which had apparently not gotten  
touched when we added "make check" support here.  
  
Back-patch to 9.6; older versions don't have comparable timeout logic.  
  
Discussion: https://postgr.es/m/22964.1575842935@sss.pgh.pa.us  

M src/test/isolation/README
M src/test/isolation/isolationtester.c

Fix typos in miscinit.c.

commit   : a7472d2b7a36deb3474d3a21f5aba0b643da3065    
  
author   : Amit Kapila <akapila@postgresql.org>    
date     : Mon, 9 Dec 2019 08:39:34 +0530    
  
committer: Amit Kapila <akapila@postgresql.org>    
date     : Mon, 9 Dec 2019 08:39:34 +0530    

Click here for diff

Commit f13ea95f9e moved the description of postmaster.pid file contents  
from miscadmin.h to pidfile.h, but missed to update the comments in  
miscinit.c.  
  
Author: Hadi Moshayedi  
Reviewed-by: Amit Kapila  
Backpatch-through: 10  
Discussion: https://postgr.es/m/CAK=1=WpYEM9x3LGkaxgXaxeYQjnkdW8XLsxrYRTE2Gq-H83FMw@mail.gmail.com  

M src/backend/utils/init/miscinit.c

Document search_path security with untrusted dbowner or CREATEROLE.

commit   : cc4371dc345392777aa419ca872b28c4169a797b    
  
author   : Noah Misch <noah@leadboat.com>    
date     : Sun, 8 Dec 2019 11:06:26 -0800    
  
committer: Noah Misch <noah@leadboat.com>    
date     : Sun, 8 Dec 2019 11:06:26 -0800    

Click here for diff

Commit 5770172cb0c9df9e6ce27c507b449557e5b45124 wrote, incorrectly, that  
certain schema usage patterns are secure against CREATEROLE users and  
database owners.  When an untrusted user is the database owner or holds  
CREATEROLE privilege, a query is secure only if its session started with  
SELECT pg_catalog.set_config('search_path', '', false) or equivalent.  
Back-patch to 9.4 (all supported versions).  
  
Discussion: https://postgr.es/m/20191013013512.GC4131753@rfd.leadboat.com  

M doc/src/sgml/ddl.sgml

Doc: improve documentation about run-time pruning's effects on EXPLAIN.

commit   : ba62bb63b399dcd6e80817b1c73ead9d87ecc311    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sun, 8 Dec 2019 10:36:29 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sun, 8 Dec 2019 10:36:29 -0500    

Click here for diff

Tatsuo Ishii complained that this para wasn't very intelligible.  
Try to make it better.  
  
Discussion: https://postgr.es/m/20191207.200500.989741087350666720.t-ishii@sraoss.co.jp  

M doc/src/sgml/perform.sgml

Fix handling of OpenSSL's SSL_clear_options

commit   : 902276ff1309ce30522d2b1bc343898c786ca02d    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Fri, 6 Dec 2019 15:14:26 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Fri, 6 Dec 2019 15:14:26 +0900    

Click here for diff

This function is supported down to OpenSSL 0.9.8, which is the oldest  
version supported since 593d4e4 (from Postgres 10 onwards), and is used  
since e3bdb2d (from 11 onwards).  It is defined as a macro from OpenSSL  
0.9.8 to 1.0.2, and as a function in 1.1.0 and newer versions.  However,  
the configure check present is only adapted for functions.  So, even if  
the code would be able to compile, configure fails to detect the macro,  
causing it to be ignored when compiling the code with OpenSSL from 0.9.8  
to 1.0.2.  
  
The code needs a configure check as per a364dfa, which has fixed a  
compilation issue with a past version of LibreSSL in NetBSD 5.1.  On  
HEAD, just remove the configure check as the last release of NetBSD 5 is  
from 2014 (and we have no more buildfarm members for it).  In 11 and 12,  
improve the configure logic so as both macros and functions are  
correctly detected.  This makes NetBSD 5 still work on already-released  
branches, but not for 13 onwards.  
  
The patch for HEAD is from me, and Daniel has written the version to use  
for the back-branches.  
  
Author: Michael Paquier, Daniel Gustaffson  
Reviewed-by: Tom Lane  
Discussion: https://postgr.es/m/20191205083252.GE5064@paquier.xyz  
Discussion: https://postgr.es/m/98F7F99E-1129-41D8-B86B-FE3B1E286881@yesql.se  
Backpatch-through: 11  

M configure
M configure.in

Fix whitespace.

commit   : 0e5baa095176cbb77f8ea30054ab4c3a59409da7    
  
author   : Etsuro Fujita <efujita@postgresql.org>    
date     : Wed, 4 Dec 2019 12:45:01 +0900    
  
committer: Etsuro Fujita <efujita@postgresql.org>    
date     : Wed, 4 Dec 2019 12:45:01 +0900    

Click here for diff

M src/backend/executor/nodeModifyTable.c

Ensure maxlen is at leat 1 in dict_int

commit   : a8a8c6b296406bbf30948768939c08457bd468a4    
  
author   : Tomas Vondra <tomas.vondra@postgresql.org>    
date     : Tue, 3 Dec 2019 16:55:51 +0100    
  
committer: Tomas Vondra <tomas.vondra@postgresql.org>    
date     : Tue, 3 Dec 2019 16:55:51 +0100    

Click here for diff

The dict_int text search dictionary template accepts maxlen parameter,  
which is then used to cap the length of input strings. The value was  
not properly checked, and the code simply does  
  
    txt[d->maxlen] = '\0';  
  
to insert a terminator, leading to segfaults with negative values.  
  
This commit simply rejects values less than 1. The issue was there since  
dct_int was introduced in 9.3, so backpatch all the way back to 9.4  
which is the oldest supported version.  
  
Reported-by: cili  
Discussion: https://postgr.es/m/16144-a36a5bef7657047d@postgresql.org  
Backpatch-through: 9.4  

M contrib/dict_int/dict_int.c
M contrib/dict_int/expected/dict_int.out
M contrib/dict_int/sql/dict_int.sql

Fix failures with TAP tests of pg_ctl on Windows

commit   : ef30975b49702f9f8aaed7b1cd8f78470ed1b22d    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Tue, 3 Dec 2019 13:01:40 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Tue, 3 Dec 2019 13:01:40 +0900    

Click here for diff

On Windows, all the hosts spawned by the TAP tests bind to 127.0.0.1.  
Hence, if there is a port conflict, starting a cluster would immediately  
fail.  One of the test scripts of pg_ctl initializes a node without  
PostgresNode.pm, using the default port 5432.  This could cause  
unexpected startup failures in the tests if an independent server was up  
and running on the same host (the reverse is also possible, though more  
unlikely).  Fix this issue by assigning properly a free port to the node  
configured, in the same range used as for the other nodes part of the  
tests.  
  
Author: Michael Paquier  
Reviewed-by: Andrew Dunstan  
Discussion: https://postgr.es/m/20191202031444.GC1696@paquier.xyz  
Backpatch-through: 11  

M src/bin/pg_ctl/t/001_start_stop.pl

Fix misbehavior with expression indexes on ON COMMIT DELETE ROWS tables.

commit   : b154d70f743039452f2cadee9566d754e79e3653    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sun, 1 Dec 2019 13:09:26 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sun, 1 Dec 2019 13:09:26 -0500    

Click here for diff

We implement ON COMMIT DELETE ROWS by truncating tables marked that  
way, which requires also truncating/rebuilding their indexes.  But  
RelationTruncateIndexes asks the relcache for up-to-date copies of any  
index expressions, which may cause execution of eval_const_expressions  
on them, which can result in actual execution of subexpressions.  
This is a bad thing to have happening during ON COMMIT.  Manuel Rigger  
reported that use of a SQL function resulted in crashes due to  
expectations that ActiveSnapshot would be set, which it isn't.  
The most obvious fix perhaps would be to push a snapshot during  
PreCommit_on_commit_actions, but I think that would just open the door  
to more problems: CommitTransaction explicitly expects that no  
user-defined code can be running at this point.  
  
Fortunately, since we know that no tuples exist to be indexed, there  
seems no need to use the real index expressions or predicates during  
RelationTruncateIndexes.  We can set up dummy index expressions  
instead (we do need something that will expose the right data type,  
as there are places that build index tupdescs based on this), and  
just ignore predicates and exclusion constraints.  
  
In a green field it'd likely be better to reimplement ON COMMIT DELETE  
ROWS using the same "init fork" infrastructure used for unlogged  
relations.  That seems impractical without catalog changes though,  
and even without that it'd be too big a change to back-patch.  
So for now do it like this.  
  
Per private report from Manuel Rigger.  This has been broken forever,  
so back-patch to all supported branches.  

M src/backend/catalog/heap.c
M src/backend/catalog/index.c
M src/backend/utils/cache/relcache.c
M src/include/catalog/index.h
M src/include/utils/relcache.h
M src/test/regress/expected/temp.out
M src/test/regress/sql/temp.sql

Fix off-by-one error in PGTYPEStimestamp_fmt_asc

commit   : 0dafed6fedf4da0e0e38c5961ae4b1540b4a8a5c    
  
author   : Tomas Vondra <tomas.vondra@postgresql.org>    
date     : Sat, 30 Nov 2019 14:51:27 +0100    
  
committer: Tomas Vondra <tomas.vondra@postgresql.org>    
date     : Sat, 30 Nov 2019 14:51:27 +0100    

Click here for diff

When using %b or %B patterns to format a date, the code was simply using  
tm_mon as an index into array of month names. But that is wrong, because  
tm_mon is 1-based, while array indexes are 0-based. The result is we  
either use name of the next month, or a segfault (for December).  
  
Fix by subtracting 1 from tm_mon for both patterns, and add a regression  
test triggering the issue. Backpatch to all supported versions (the bug  
is there far longer, since at least 2003).  
  
Reported-by: Paul Spencer  
Backpatch-through: 9.4  
Discussion: https://postgr.es/m/16143-0d861eb8688d3fef%40postgresql.org  

M src/interfaces/ecpg/pgtypeslib/timestamp.c
M src/interfaces/ecpg/test/expected/pgtypeslib-dt_test.c
M src/interfaces/ecpg/test/expected/pgtypeslib-dt_test.stderr
M src/interfaces/ecpg/test/expected/pgtypeslib-dt_test.stdout
M src/interfaces/ecpg/test/pgtypeslib/dt_test.pgc

Remove unnecessary clauses_attnums variable

commit   : 79d6e6afabcb3766ea4d21e3e26d25a5f2f69553    
  
author   : Tomas Vondra <tomas.vondra@postgresql.org>    
date     : Thu, 28 Nov 2019 23:25:14 +0100    
  
committer: Tomas Vondra <tomas.vondra@postgresql.org>    
date     : Thu, 28 Nov 2019 23:25:14 +0100    

Click here for diff

Commit c676e659b2 reworked how choose_best_statistics() picks the best  
extended statistics, but failed to remove clauses_attnums which is now  
unnecessary. So get rid of it and backpatch to 12, same as c676e659b2.  
  
Author: Tomas Vondra  
Discussion: https://postgr.es/m/CA+u7OA7H5rcE2=8f263w4NZD6ipO_XOrYB816nuLXbmSTH9pQQ@mail.gmail.com  
Backpatch-through: 12  

M src/backend/statistics/extended_stats.c

Fix choose_best_statistics to check clauses individually

commit   : ef3fed2ce4a3018a992ef913a3333bb682b702ae    
  
author   : Tomas Vondra <tomas.vondra@postgresql.org>    
date     : Thu, 28 Nov 2019 22:20:28 +0100    
  
committer: Tomas Vondra <tomas.vondra@postgresql.org>    
date     : Thu, 28 Nov 2019 22:20:28 +0100    

Click here for diff

When picking the best extended statistics object for a list of clauses,  
it's not enough to look at attnums extracted from the clause list as a  
whole. Consider for example this query with OR clauses:  
  
   SELECT * FROM t WHERE (t.a = 1) OR (t.b = 1) OR (t.c = 1)  
  
with a statistics defined on columns (a,b). Relying on attnums extracted  
from the whole OR clause, we'd consider the statistics usable. That does  
not work, as we see the conditions as a single OR-clause, referencing an  
attribute not covered by the statistic, leading to empty list of clauses  
to be estimated using the statistics and an assert failure.  
  
This changes choose_best_statistics to check which clauses are actually  
covered, and only using attributes from the fully covered ones. For the  
previous example this means the statistics object will not be considered  
as compatible with the OR-clause.  
  
Backpatch to 12, where MCVs were introduced. The issue does not affect  
older versions because functional dependencies don't handle OR clauses.  
  
Author: Tomas Vondra  
Reviewed-by: Dean Rasheed  
Reported-By: Manuel Rigger  
Discussion: https://postgr.es/m/CA+u7OA7H5rcE2=8f263w4NZD6ipO_XOrYB816nuLXbmSTH9pQQ@mail.gmail.com  
Backpatch-through: 12  

M src/backend/statistics/dependencies.c
M src/backend/statistics/extended_stats.c
M src/include/statistics/statistics.h
M src/test/regress/expected/stats_ext.out
M src/test/regress/sql/stats_ext.sql

Fix typo in comment.

commit   : bf3cef24a31966686dfaae3085ce7c545c0019a4    
  
author   : Etsuro Fujita <efujita@postgresql.org>    
date     : Wed, 27 Nov 2019 16:00:46 +0900    
  
committer: Etsuro Fujita <efujita@postgresql.org>    
date     : Wed, 27 Nov 2019 16:00:46 +0900    

Click here for diff

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

Allow access to child table statistics if user can read parent table.

commit   : 21a4edd1281de5efd09f1cf5c6073af14a2de409    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 26 Nov 2019 14:41:48 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 26 Nov 2019 14:41:48 -0500    

Click here for diff

The fix for CVE-2017-7484 disallowed use of pg_statistic data for  
planning purposes if the user would not be able to select the associated  
column and a non-leakproof function is to be applied to the statistics  
values.  That turns out to disable use of pg_statistic data in some  
common cases involving inheritance/partitioning, where the user does  
have permission to select from the parent table that was actually named  
in the query, but not from a child table whose stats are needed.  Since,  
in non-corner cases, the user *can* select the child table's data via  
the parent, this restriction is not actually useful from a security  
standpoint.  Improve the logic so that we also check the permissions of  
the originally-named table, and allow access if select permission exists  
for that.  
  
When checking access to stats for a simple child column, we can map  
the child column number back to the parent, and perform this test  
exactly (including not allowing access if the child column isn't  
exposed by the parent).  For expression indexes, the current logic  
just insists on whole-table select access, and this patch allows  
access if the user can select the whole parent table.  In principle,  
if the child table has extra columns, this might allow access to  
stats on columns the user can't read.  In practice, it's unlikely  
that the planner is going to do any stats calculations involving  
expressions that are not visible to the query, so we'll ignore that  
fine point for now.  Perhaps someday we'll improve that logic to  
detect exactly which columns are used by an expression index ...  
but today is not that day.  
  
Back-patch to v11.  The issue was created in 9.2 and up by the  
CVE-2017-7484 fix, but this patch depends on the append_rel_array[]  
planner data structure which only exists in v11 and up.  In  
practice the issue is most urgent with partitioned tables, so  
fixing v11 and later should satisfy much of the practical need.  
  
Dilip Kumar and Amit Langote, with some kibitzing by me  
  
Discussion: https://postgr.es/m/3876.1531261875@sss.pgh.pa.us  

M src/backend/utils/adt/selfuncs.c
M src/test/regress/expected/inherit.out
M src/test/regress/sql/inherit.sql

Don't shut down Gather[Merge] early under Limit.

commit   : 1cc3a90c7551cf1f33611152eba2bca56e0b721e    
  
author   : Amit Kapila <akapila@postgresql.org>    
date     : Mon, 18 Nov 2019 14:17:41 +0530    
  
committer: Amit Kapila <akapila@postgresql.org>    
date     : Mon, 18 Nov 2019 14:17:41 +0530    

Click here for diff

Revert part of commit 19df1702f5.  
  
Early shutdown was added by that commit so that we could collect  
statistics from workers, but unfortunately, it interacted badly with  
rescans.  The problem is that we ended up destroying the parallel context  
which is required for rescans.  This leads to rescans of a Limit node over  
a Gather node to produce unpredictable results as it tries to access  
destroyed parallel context.  By reverting the early shutdown code, we  
might lose statistics in some cases of Limit over Gather [Merge], but that  
will require further study to fix.  
  
Reported-by: Jerry Sievers  
Diagnosed-by: Thomas Munro  
Author: Amit Kapila, testcase by Vignesh C  
Backpatch-through: 9.6  
Discussion: https://postgr.es/m/87ims2amh6.fsf@jsievers.enova.com  

M src/backend/executor/nodeLimit.c
M src/test/regress/expected/select_parallel.out
M src/test/regress/sql/select_parallel.sql

Avoid assertion failure with LISTEN in a serializable transaction.

commit   : a24a4167aa3889d26c425d38a8c67cc39df35fbd    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sun, 24 Nov 2019 15:57:31 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sun, 24 Nov 2019 15:57:31 -0500    

Click here for diff

If LISTEN is the only action in a serializable-mode transaction,  
and the session was not previously listening, and the notify queue  
is not empty, predicate.c reported an assertion failure.  That  
happened because we'd acquire the transaction's initial snapshot  
during PreCommit_Notify, which was called *after* predicate.c  
expects any such snapshot to have been established.  
  
To fix, just swap the order of the PreCommit_Notify and  
PreCommit_CheckForSerializationFailure calls during CommitTransaction.  
This will imply holding the notify-insertion lock slightly longer,  
but the difference could only be meaningful in serializable mode,  
which is an expensive option anyway.  
  
It appears that this is just an assertion failure, with no  
consequences in non-assert builds.  A snapshot used only to scan  
the notify queue could not have been involved in any serialization  
conflicts, so there would be nothing for  
PreCommit_CheckForSerializationFailure to do except assign it a  
prepareSeqNo and set the SXACT_FLAG_PREPARED flag.  And given no  
conflicts, neither of those omissions affect the behavior of  
ReleasePredicateLocks.  This admittedly once-over-lightly analysis  
is backed up by the lack of field reports of trouble.  
  
Per report from Mark Dilger.  The bug is old, so back-patch to all  
supported branches; but the new test case only goes back to 9.6,  
for lack of adequate isolationtester infrastructure before that.  
  
Discussion: https://postgr.es/m/3ac7f397-4d5f-be8e-f354-440020675694@gmail.com  
Discussion: https://postgr.es/m/13881.1574557302@sss.pgh.pa.us  

M src/backend/access/transam/xact.c
M src/test/isolation/expected/async-notify.out
M src/test/isolation/specs/async-notify.spec

doc: Fix whitespace in syntax.

commit   : ec9f6be3b9a935864f28b9ef183a9a4d08662cc3    
  
author   : Thomas Munro <tmunro@postgresql.org>    
date     : Mon, 25 Nov 2019 09:20:28 +1300    
  
committer: Thomas Munro <tmunro@postgresql.org>    
date     : Mon, 25 Nov 2019 09:20:28 +1300    

Click here for diff

Back-patch to 10.  
  
Author: Andreas Karlsson  
Discussion: https://postgr.es/m/043acae2-a369-b7fa-be48-1933aa2e82d1%40proxel.se  

M doc/src/sgml/ref/insert.sgml

Stabilize NOTIFY behavior by transmitting notifies before ReadyForQuery.

commit   : c47f498c93f9ebbb44cd03cf82f817da15761350    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sun, 24 Nov 2019 14:42:59 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sun, 24 Nov 2019 14:42:59 -0500    

Click here for diff

This patch ensures that, if any notify messages were received during  
a just-finished transaction, they get sent to the frontend just before  
not just after the ReadyForQuery message.  With libpq and other client  
libraries that act similarly, this guarantees that the client will see  
the notify messages as available as soon as it thinks the transaction  
is done.  
  
This probably makes no difference in practice, since in realistic  
use-cases the application would have to cope with asynchronous  
arrival of notify events anyhow.  However, it makes it a lot easier  
to build cross-session-notify test cases with stable behavior.  
I'm a bit surprised now that we've not seen any buildfarm instability  
with the test cases added by commit b10f40bf0.  Tests that I intend  
to add in an upcoming bug fix are definitely unstable without this.  
  
Back-patch to 9.6, which is as far back as we can do NOTIFY testing  
with the isolationtester infrastructure.  
  
Discussion: https://postgr.es/m/13881.1574557302@sss.pgh.pa.us  

M src/backend/commands/async.c
M src/backend/tcop/postgres.c

Improve test coverage for LISTEN/NOTIFY.

commit   : 7d4c3118137a37dddcefe28145a3a2e4bccf59fd    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sat, 23 Nov 2019 17:30:00 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sat, 23 Nov 2019 17:30:00 -0500    

Click here for diff

Back-patch commit b10f40bf0 into older branches.  This adds reporting  
of NOTIFY messages to isolationtester.c, and extends the async-notify  
test to include direct tests of basic NOTIFY functionality.  
  
This provides useful infrastructure for testing a bug fix I'm about  
to back-patch, and there seems no good reason not to have better tests  
of LISTEN/NOTIFY in the back branches.  The commit's survived long  
enough in HEAD to make it unlikely that it will cause problems.  
  
Back-patch as far as 9.6.  isolationtester.c changed too much in 9.6  
to make it sane to try to fix older branches this way, and I don't  
really want to back-patch those changes too.  
  
Discussion: https://postgr.es/m/31304.1564246011@sss.pgh.pa.us  

M src/test/isolation/expected/async-notify.out
M src/test/isolation/isolationtester.c
M src/test/isolation/specs/async-notify.spec

Add test coverage for "unchanged toast column" replication code path.

commit   : 8047a7b9dd454a6514ab7d0fcbe27aca3ec2e11c    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 22 Nov 2019 12:52:26 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 22 Nov 2019 12:52:26 -0500    

Click here for diff

It seems pretty unacceptable to have no regression test coverage  
for this aspect of the logical replication protocol, especially  
given the bugs we've found in related code.  
  
Discussion: https://postgr.es/m/16129-a0c0f48e71741e5f@postgresql.org  

M src/test/subscription/t/001_rep_changes.pl

Fix bogus tuple-slot management in logical replication UPDATE handling.

commit   : a2aa224e05dca3caf45beb6720a8b9a25e68efad    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 22 Nov 2019 11:31:19 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 22 Nov 2019 11:31:19 -0500    

Click here for diff

slot_modify_cstrings seriously abused the TupleTableSlot API by relying  
on a slot's underlying data to stay valid across ExecClearTuple.  Since  
this abuse was also quite undocumented, it's little surprise that the  
case got broken during the v12 slot rewrites.  As reported in bug #16129  
from Ondřej Jirman, this could lead to crashes or data corruption when  
a logical replication subscriber processes a row update.  Problems would  
only arise if the subscriber's table contained columns of pass-by-ref  
types that were not being copied from the publisher.  
  
Fix by explicitly copying the datum/isnull arrays from the source slot  
that the old row was in already.  This ends up being about the same  
thing that happened pre-v12, but hopefully in a less opaque and  
fragile way.  
  
We might've caught the problem sooner if there were any test cases  
dealing with updates involving non-replicated or dropped columns.  
Now there are.  
  
Back-patch to v10 where this code came in.  Even though the failure  
does not manifest before v12, IMO this code is too fragile to leave  
as-is.  In any case we certainly want the additional test coverage.  
  
Patch by me; thanks to Tomas Vondra for initial investigation.  
  
Discussion: https://postgr.es/m/16129-a0c0f48e71741e5f@postgresql.org  

M src/backend/replication/logical/worker.c
M src/test/subscription/t/001_rep_changes.pl

Defend against self-referential views in relation_is_updatable().

commit   : 5186f7625e5fc0e3ae85419099a75d6aa93d8351    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 21 Nov 2019 16:21:43 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Thu, 21 Nov 2019 16:21:43 -0500    

Click here for diff

While a self-referential view doesn't actually work, it's possible  
to create one, and it turns out that this breaks some of the  
information_schema views.  Those views call relation_is_updatable(),  
which neglected to consider the hazards of being recursive.  In  
older PG versions you get a "stack depth limit exceeded" error,  
but since v10 it'd recurse to the point of stack overrun and crash,  
because commit a4c35ea1c took out the expression_returns_set() call  
that was incidentally checking the stack depth.  
  
Since this function is only used by information_schema views, it  
seems like it'd be better to return "not updatable" than suffer  
an error.  Hence, add tracking of what views we're examining,  
in just the same way that the nearby fireRIRrules() code detects  
self-referential views.  I added a check_stack_depth() call too,  
just to be defensive.  
  
Per private report from Manuel Rigger.  Back-patch to all  
supported versions.  

M src/backend/rewrite/rewriteHandler.c
M src/backend/utils/adt/misc.c
M src/include/rewrite/rewriteHandler.h

Provide statistics for hypothetical BRIN indexes

commit   : c644407f757c26c9037e4dfc67f57b841489afd4    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Thu, 21 Nov 2019 10:23:38 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Thu, 21 Nov 2019 10:23:38 +0900    

Click here for diff

Trying to use hypothetical indexes with BRIN currently fails when trying  
to access a relation that does not exist when looking for the  
statistics.  With the current API, it is not possible to easily pass  
a value for pages_per_range down to the hypothetical index, so this  
makes use of the default value of BRIN_DEFAULT_PAGES_PER_RANGE, which  
should be fine enough in most cases.  
  
Being able to refine or enforce the hypothetical costs in more  
optimistic ways would require more refactoring by filling in the  
statistics when building IndexOptInfo in plancat.c.  This would involve  
ABI breakages around the costing routines, something not fit for stable  
branches.  
  
This is broken since 7e534ad, so backpatch down to v10.  
  
Author: Julien Rouhaud, Heikki Linnakangas  
Reviewed-by: Álvaro Herrera, Tom Lane, Michael Paquier  
Discussion: https://postgr.es/m/CAOBaU_ZH0LKEA8VFCocr6Lpte1ab0b6FpvgS0y4way+RPSXfYg@mail.gmail.com  
Backpatch-through: 10  

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

Remove incorrect markup

commit   : 2c9772f5f5b4172d7332c7fbf742d773bdf44e1c    
  
author   : Magnus Hagander <magnus@hagander.net>    
date     : Wed, 20 Nov 2019 17:03:07 +0100    
  
committer: Magnus Hagander <magnus@hagander.net>    
date     : Wed, 20 Nov 2019 17:03:07 +0100    

Click here for diff

Author: Daniel Gustafsson <daniel@yesql.se>  

M doc/src/sgml/libpq.sgml

Handle ReadFile() EOF correctly on Windows.

commit   : 2189f49c420f2bf49dfac122f9fbae51c3565594    
  
author   : Thomas Munro <tmunro@postgresql.org>    
date     : Wed, 20 Nov 2019 17:52:15 +1300    
  
committer: Thomas Munro <tmunro@postgresql.org>    
date     : Wed, 20 Nov 2019 17:52:15 +1300    

Click here for diff

When ReadFile() encounters the end of a file while reading from  
a synchronous handle with an offset provided via OVERLAPPED, it  
reports an error instead of returning 0.  By not handling that  
(undocumented) result correctly, we caused some noisy LOG  
messages about an unknown error code.  Repair.  
  
Back-patch to 12, where we started using pread()/ReadFile() with  
an offset.  
  
Reported-by: ZhenHua Cai, Amit Kapila  
Diagnosed-by: Juan Jose Santamaria Flecha  
Tested-by: Amit Kapila  
Discussion: https://postgr.es/m/CAA4eK1LK3%2BWRtpz68TiRdpHwxxWm%3D%2Bt1BMf-G68hhQsAQ41PZg%40mail.gmail.com  

M src/port/pread.c

Doc: fix minor typo in func.sgml.

commit   : 135026653d450c28d458576a023dffc0e3cb0bf9    
  
author   : Tatsuo Ishii <ishii@postgresql.org>    
date     : Wed, 20 Nov 2019 09:13:12 +0900    
  
committer: Tatsuo Ishii <ishii@postgresql.org>    
date     : Wed, 20 Nov 2019 09:13:12 +0900    

Click here for diff

Discussion: https://postgr.es/m/20191119.222048.49467220816510881.t-ishii%40sraoss.co.jp  

M doc/src/sgml/func.sgml

Fix corner-case failure in match_pattern_prefix().

commit   : bffe18e3e7dbb3c159361e62478c324ebe3041ec    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 19 Nov 2019 17:03:26 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 19 Nov 2019 17:03:26 -0500    

Click here for diff

The planner's optimization code for LIKE and regex operators could  
error out with a complaint like "no = operator for opfamily NNN"  
if someone created a binary-compatible index (for example, a  
bpchar_ops index on a text column) on the LIKE's left argument.  
  
This is a consequence of careless refactoring in commit 74dfe58a5.  
The old code in match_special_index_operator only accepted specific  
combinations of the pattern operator and the index opclass, thereby  
indirectly guaranteeing that the opclass would have a comparison  
operator with the same LHS input type as the pattern operator.  
While moving the logic out to a planner support function, I simplified  
that test in a way that no longer guarantees that.  Really though we'd  
like an altogether weaker dependency on the opclass, so rather than  
put back exactly the old code, just allow lookup failure.  I have in  
mind now to rewrite this logic completely, but this is the minimum  
change needed to fix the bug in v12.  
  
Per report from Manuel Rigger.  Back-patch to v12 where the mistake  
came in.  
  
Discussion: https://postgr.es/m/CA+u7OA7nnGYy8rY0vdTe811NuA+Frr9nbcBO9u2Z+JxqNaud+g@mail.gmail.com  

M src/backend/utils/adt/like_support.c
M src/test/regress/expected/btree_index.out
M src/test/regress/sql/btree_index.sql

Fix page modification outside of critical section in GIN

commit   : a64e7e05a418ec26a76ecbf04c80e9ba7fe8aa90    
  
author   : Alexander Korotkov <akorotkov@postgresql.org>    
date     : Wed, 20 Nov 2019 00:12:33 +0300    
  
committer: Alexander Korotkov <akorotkov@postgresql.org>    
date     : Wed, 20 Nov 2019 00:12:33 +0300    

Click here for diff

By oversight 52ac6cd2d0 makes ginDeletePage() sets pd_prune_xid of page to be  
deleted before entering the critical section.  It appears that only versions 11  
and later were affected by this oversight.  
  
Backpatch-through: 11  

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

Revise GIN README

commit   : ca05fa5375eb3124660e24346f1bdc3990c118f2    
  
author   : Alexander Korotkov <akorotkov@postgresql.org>    
date     : Tue, 19 Nov 2019 23:11:24 +0300    
  
committer: Alexander Korotkov <akorotkov@postgresql.org>    
date     : Tue, 19 Nov 2019 23:11:24 +0300    

Click here for diff

We find GIN concurrency bugs from time to time.  One of the problems here is  
that concurrency of GIN isn't well-documented in README.  So, it might be even  
hard to distinguish design bugs from implementation bugs.  
  
This commit revised concurrency section in GIN README providing more details.  
Some examples are illustrated in ASCII art.  
  
Also, this commit add the explanation of how is tuple layout in internal GIN  
B-tree page different in comparison with nbtree.  
  
Discussion: https://postgr.es/m/CAPpHfduXR_ywyaVN4%2BOYEGaw%3DcPLzWX6RxYLBncKw8de9vOkqw%40mail.gmail.com  
Author: Alexander Korotkov  
Reviewed-by: Peter Geoghegan  
Backpatch-through: 9.4  

M src/backend/access/gin/README

Fix traversing to the deleted GIN page via downlink

commit   : ee437ca7408b67f2b785e4221c7e567aecf68b47    
  
author   : Alexander Korotkov <akorotkov@postgresql.org>    
date     : Tue, 19 Nov 2019 23:08:14 +0300    
  
committer: Alexander Korotkov <akorotkov@postgresql.org>    
date     : Tue, 19 Nov 2019 23:08:14 +0300    

Click here for diff

Current GIN code appears to don't handle traversing to the deleted page via  
downlink.  This commit fixes that by stepping right from the delete page like  
we do in nbtree.  
  
This commit also fixes setting 'deleted' flag to the GIN pages.  Now other page  
flags are not erased once page is deleted.  That helps to keep our assertions  
true if we arrive deleted page via downlink.  
  
Discussion: https://postgr.es/m/CAPpHfdvMvsw-NcE5bRS7R1BbvA4BxoDnVVjkXC5W0Czvy9LVrg%40mail.gmail.com  
Author: Alexander Korotkov  
Reviewed-by: Peter Geoghegan  
Backpatch-through: 9.4  

M src/backend/access/gin/ginbtree.c
M src/backend/access/gin/gindatapage.c
M src/backend/access/gin/ginvacuum.c
M src/backend/access/gin/ginxlog.c

Fix deadlock between ginDeletePage() and ginStepRight()

commit   : 051c50c01c32ceb498d53e78f48297713744b7cb    
  
author   : Alexander Korotkov <akorotkov@postgresql.org>    
date     : Tue, 19 Nov 2019 23:07:36 +0300    
  
committer: Alexander Korotkov <akorotkov@postgresql.org>    
date     : Tue, 19 Nov 2019 23:07:36 +0300    

Click here for diff

When ginDeletePage() is about to delete page it locks its left sibling to revise  
the rightlink.  So, it locks pages in right to left manner.  Int he same time  
ginStepRight() locks pages in left to right manner, and that could cause a  
deadlock.  
  
This commit makes ginScanToDelete() keep exclusive lock on left siblings of  
currently investigated path.  That elimites need to relock left sibling in  
ginDeletePage().  Thus, deadlock with ginStepRight() can't happen anymore.  
  
Reported-by: Chen Huajun  
Discussion: https://postgr.es/m/5c332bd1.87b6.16d7c17aa98.Coremail.chjischj%40163.com  
Author: Alexander Korotkov  
Reviewed-by: Peter Geoghegan  
Backpatch-through: 10  

M src/backend/access/gin/README
M src/backend/access/gin/ginvacuum.c

Doc: clarify use of RECURSIVE in WITH.

commit   : 823a551fe0c6e732f48cb54dc60d5cfd66b0aff4    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 19 Nov 2019 14:43:37 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 19 Nov 2019 14:43:37 -0500    

Click here for diff

Apparently some people misinterpreted the syntax as being that  
RECURSIVE is a prefix of individual WITH queries.  It's a modifier  
for the WITH clause as a whole, so state that more clearly.  
  
Discussion: https://postgr.es/m/ca53c6ce-a0c6-b14a-a8e3-162f0b2cc119@a-kretschmer.de  

M doc/src/sgml/ref/select.sgml

Doc: clarify behavior of ALTER DEFAULT PRIVILEGES ... IN SCHEMA.

commit   : 93b2bbede91b32d12d9e444e576be2efff6942b5    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 19 Nov 2019 14:21:41 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Tue, 19 Nov 2019 14:21:41 -0500    

Click here for diff

The existing text stated that "Default privileges that are specified  
per-schema are added to whatever the global default privileges are for  
the particular object type".  However, that bare-bones observation is  
not quite clear enough, as demonstrated by the complaint in bug #16124.  
Flesh it out by stating explicitly that you can't revoke built-in  
default privileges this way, and by providing an example to drive  
the point home.  
  
Back-patch to all supported branches, since it's been like this  
from the beginning.  
  
Discussion: https://postgr.es/m/16124-423d8ee4358421bc@postgresql.org  

M doc/src/sgml/ref/alter_default_privileges.sgml

Further fix dumping of views that contain just VALUES(...).

commit   : fcaf29d87a6ca08188fa9fe1ebba90c9654df006    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sat, 16 Nov 2019 20:00:19 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Sat, 16 Nov 2019 20:00:19 -0500    

Click here for diff

It turns out that commit e9f1c01b7 missed a case: we must print a  
VALUES clause in long format if get_query_def is given a resultDesc  
that would require the query's output column name(s) to be different  
from what the bare VALUES clause would produce.  
  
This applies in case an ALTER ... RENAME COLUMN has been done to  
a view that formerly could be printed in simple format, as shown  
in the added regression test case.  It also explains bug #16119  
from Dmitry Telpt, because it turns out that (unlike CREATE VIEW)  
CREATE MATERIALIZED VIEW fails to apply any column aliases it's  
given to the stored ON SELECT rule.  So to get them to be printed,  
we have to account for the resultDesc renaming.  It might be worth  
changing the matview code so that it creates the ON SELECT rule  
with the correct aliases; but we'd still need these messy checks in  
get_simple_values_rte to handle the case of a subsequent column  
rename, so any such change would be just neatnik-ism not a bug fix.  
  
Like the previous patch, back-patch to all supported branches.  
  
Discussion: https://postgr.es/m/16119-e64823f30a45a754@postgresql.org  

M src/backend/utils/adt/ruleutils.c
M src/test/regress/expected/rules.out
M src/test/regress/sql/rules.sql

Improve stability of tests for VACUUM (SKIP_LOCKED)

commit   : bbaa38e824236ac106fffbf5f61e5da9b3dc1ec9    
  
author   : Michael Paquier <michael@paquier.xyz>    
date     : Sat, 16 Nov 2019 15:23:50 +0900    
  
committer: Michael Paquier <michael@paquier.xyz>    
date     : Sat, 16 Nov 2019 15:23:50 +0900    

Click here for diff

Concurrent autovacuums running with the main regression test suite  
could cause the tests with VACUUM (SKIP_LOCKED) to generate randomly  
WARNING messages.  For these tests, set client_min_messages to ERROR to  
get rid of those random failures, as disabling autovacuum for the  
relations operated would not completely close the failure window.  
  
For isolation tests, disable autovacuum for the relations vacuumed with  
SKIP_LOCKED.  The tests are designed so as LOCK commands are taken  
in a first session before running a concurrent VACUUM (SKIP_LOCKED) in a  
second to generate WARNING messages, but a concurrent autovacuum could  
cause the tests to be slower.  
  
Reported-by: Tom Lane  
Author: Michael Paquier  
Reviewed-by: Andres Freund, Tom Lane  
Discussion: https://postgr.es/m/25294.1573077278@sss.pgh.pa.us  
Backpatch-through: 12  

M src/test/isolation/specs/vacuum-skip-locked.spec
M src/test/regress/expected/vacuum.out
M src/test/regress/sql/vacuum.sql

Skip system attributes when applying mvdistinct stats

commit   : 28555a53cb75d00ed0e73f63a6481b4fffcc3dea    
  
author   : Tomas Vondra <tomas.vondra@postgresql.org>    
date     : Sat, 16 Nov 2019 01:17:15 +0100    
  
committer: Tomas Vondra <tomas.vondra@postgresql.org>    
date     : Sat, 16 Nov 2019 01:17:15 +0100    

Click here for diff

When estimating number of distinct groups, we failed to ignore system  
attributes when matching the group expressions to mvdistinct stats,  
causing failures like  
  
  ERROR: negative bitmapset member not allowed  
  
Fix that by simply skipping anything that is not a regular attribute.  
Backpatch to PostgreSQL 10, where the extended stats were introduced.  
  
Bug: #16111  
Reported-by: Tuomas Leikola  
Author: Tomas Vondra  
Backpatch-through: 10  
Discussion: https://postgr.es/m/16111-687799584c3a7e73@postgresql.org  

M src/backend/utils/adt/selfuncs.c
M src/test/regress/expected/stats_ext.out
M src/test/regress/sql/stats_ext.sql

Always call ExecShutdownNode() if appropriate.

commit   : 24897e1a1af27dc759fb41afba2a663ff9af4ef6    
  
author   : Thomas Munro <tmunro@postgresql.org>    
date     : Sat, 16 Nov 2019 10:04:52 +1300    
  
committer: Thomas Munro <tmunro@postgresql.org>    
date     : Sat, 16 Nov 2019 10:04:52 +1300    

Click here for diff

Call ExecShutdownNode() after ExecutePlan()'s loop, rather than at each  
break.  We had forgotten to do that in one case.  The omission caused  
intermittent "temporary file leak" warnings from multi-batch parallel  
hash joins with a LIMIT clause.  
  
Back-patch to 11.  Though the problem exists in theory in earlier  
parallel query releases, nothing really depended on it.  
  
Author: Kyotaro Horiguchi  
Reviewed-by: Thomas Munro, Amit Kapila  
Discussion: https://postgr.es/m/20191111.212418.2222262873417235945.horikyota.ntt%40gmail.com  

M src/backend/executor/execMain.c

Doc: in v12 release notes, explain how to replace uses of consrc and adsrc.

commit   : d61e7f174db9ee45df58afc103682d933048aa9a    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 15 Nov 2019 12:31:53 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Fri, 15 Nov 2019 12:31:53 -0500    

Click here for diff

While you can find that info if you drill down far enough, it seems more  
helpful to put something right in the compatibility notes.  Per a question  
from Ivan Sergio Borgonovo.  
  
Discussion: https://postgr.es/m/a6359855-2a5e-a56c-ebba-4ea46a1f0ebe@webthatworks.it  

M doc/src/sgml/release-12.sgml

Add missing check_collation_set call to bpcharne().

commit   : 5a6eea0926f4b732a803149a6c169b1f79993fa9    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 13 Nov 2019 15:53:53 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 13 Nov 2019 15:53:53 -0500    

Click here for diff

We should throw an error for indeterminate collation, but bpcharne()  
was missing that logic, resulting in a much less user-friendly error  
(either an assertion failure or "cache lookup failed for collation 0").  
  
Per report from Manuel Rigger.  Back-patch to v12 where the mistake  
came in, evidently in commit 5e1963fb7.  (Before non-deterministic  
collations, this function wasn't collation sensitive.)  
  
Discussion: https://postgr.es/m/CA+u7OA4HOjtymxAbuGNh4-X_2R0Lw5n01tzvP8E5-i-2gQXYWA@mail.gmail.com  

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

Fix silly initializations (cosmetic only).

commit   : 99cc47b1d85aabc4a80910c839073f83a4fb163b    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 13 Nov 2019 15:26:54 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 13 Nov 2019 15:26:54 -0500    

Click here for diff

Initializing a pointer to "false" isn't per project style,  
and reportedly some compilers warn about it (though I've  
not seen any such warnings in the buildfarm).  
  
Seems to have come in with commit ff11e7f4b, so back-patch  
to v12 where that was added.  
  
Didier Gautheron  
  
Discussion: https://postgr.es/m/CAJRYxu+XQuM0qnSqt1Ujztu6fBPzMMAT3VEn6W32rgKG6A2Fsw@mail.gmail.com  

M src/backend/commands/trigger.c

Avoid downcasing/truncation of RADIUS authentication parameters.

commit   : d9802590a1b32b5d3d071766f7814a31cc00fc87    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 13 Nov 2019 13:41:04 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 13 Nov 2019 13:41:04 -0500    

Click here for diff

Commit 6b76f1bb5 changed all the RADIUS auth parameters to be lists  
rather than single values.  But its use of SplitIdentifierString  
to parse the list format was not very carefully thought through,  
because that function thinks it's parsing SQL identifiers, which  
means it will (a) downcase the strings and (b) truncate them to  
be shorter than NAMEDATALEN.  While downcasing should be harmless  
for the server names and ports, it's just wrong for the shared  
secrets, and probably for the NAS Identifier strings as well.  
The truncation aspect is at least potentially a problem too,  
though typical values for these parameters would fit in 63 bytes.  
  
Fortunately, we now have a function SplitGUCList that is exactly  
the same except for not doing the two unwanted things, so fixing  
this is a trivial matter of calling that function instead.  
  
While here, improve the documentation to show how to double-quote  
the parameter values.  I failed to resist the temptation to do  
some copy-editing as well.  
  
Report and patch from Marcos David (bug #16106); doc changes by me.  
Back-patch to v10 where the aforesaid commit came in, since this is  
arguably a regression from our previous behavior with RADIUS auth.  
  
Discussion: https://postgr.es/m/16106-7d319e4295d08e70@postgresql.org  

M doc/src/sgml/client-auth.sgml
M src/backend/libpq/hba.c

Include TableFunc references when computing expression dependencies.

commit   : eec569fac7a5cae17670f777c5a31054bf89ecfb    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 13 Nov 2019 12:11:49 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 13 Nov 2019 12:11:49 -0500    

Click here for diff

The TableFunc node (i.e., XMLTABLE) includes type and collation OIDs  
that might not be referenced anywhere else in the expression tree,  
so they need to be accounted for when extracting dependencies.  
  
Fortunately, the practical effects of this are limited, since  
(a) it's somewhat unlikely that people would be extracting  
columns of non-builtin types from an XML document, and (b)  
in many scenarios, the query would contain other references  
to such types, or functions depending on them.  However, it's  
not hard to construct examples wherein the existing code lets  
one drop a type used in XMLTABLE and thereby break a view.  
  
This is evidently an original oversight in the XMLTABLE patch,  
so back-patch to v10 where that came in.  
  
Discussion: https://postgr.es/m/18427.1573508501@sss.pgh.pa.us  

M src/backend/catalog/dependency.c

Handle arrays and ranges in pg_upgrade's test for non-upgradable types.

commit   : 1cd57b05ef8bc1ff5862a004ef621884613a4f0d    
  
author   : Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 13 Nov 2019 11:35:37 -0500    
  
committer: Tom Lane <tgl@sss.pgh.pa.us>    
date     : Wed, 13 Nov 2019 11:35:37 -0500    

Click here for diff

pg_upgrade needs to check whether certain non-upgradable data types  
appear anywhere on-disk in the source cluster.  It knew that it has  
to check for these types being contained inside domains and composite  
types; but it somehow overlooked that they could be contained in  
arrays and ranges, too.  Extend the existing recursive-containment  
query to handle those cases.  
  
We probably should have noticed this oversight while working on  
commit 0ccfc2822 and follow-ups, but we failed to :-(.  The whole  
thing's possibly a bit overdesigned, since we don't really expect  
that any of these types will appear on disk; but if we're going to  
the effort of doing a recursive search then it's silly not to cover  
all the possibilities.  
  
While at it, refactor so that we have only one copy of the search  
logic, not three-and-counting.  Also, to keep the branches looking  
more alike, back-patch the output wording change of commit 1634d3615.  
  
Back-patch to all supported branches.  
  
Discussion: https://postgr.es/m/31473.1573412838@sss.pgh.pa.us  

M src/bin/pg_upgrade/version.c

docs: clarify that only INSERT and UPDATE triggers can mod. NEW

commit   : 5f2cfe7f5fbd90f0d6ffef26c90808f4bd3e1d51    
  
author   : Bruce Momjian <bruce@momjian.us>    
date     : Tue, 12 Nov 2019 22:04:31 -0500    
  
committer: Bruce Momjian <bruce@momjian.us>    
date     : Tue, 12 Nov 2019 22:04:31 -0500    

Click here for diff

The point is that DELETE triggers cannot modify any values.  
  
Reported-by: Eugen Konkov, Liudmila Mantrova  
  
Discussion: https://postgr.es/m/919823407.20191029175436@yandex.ru  
  
Backpatch-through: 12 only, where commit as missing  

M doc/src/sgml/trigger.sgml