| Commit message (Collapse) | Author | Age |
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Also remove ALTER TYPE ...SUBSCRIPT, and update for all current commits.
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Per buildfarm
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Allowing only on/off meant that all either all existing configuration
guides would become obsolete if we disabled it by default, or that we
would have to accept a performance loss in the default config if we
enabled it by default. By allowing 'auto' as a middle ground, the
performance cost is only paid by those who enable pg_stat_statements and
similar modules.
I only edited the release notes to comment-out a paragraph that is now
factually wrong; further edits are probably needed to describe the
related change in more detail.
Author: Julien Rouhaud <rjuju123@gmail.com>
Reviewed-by: Justin Pryzby <pryzby@telsasoft.com>
Discussion: https://postgr.es/m/20210513002623.eugftm4nk2lvvks3@nol
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ForgetBackgroundWorker lacked any memory barrier at all, while
BackgroundWorkerStateChange had one but unaccountably did
additional manipulation of the slot after the barrier. AFAICS,
the rule must be that the barrier is immediately before setting
or clearing slot->in_use.
It looks like back in 9.6 when ForgetBackgroundWorker was first
written, there might have been some case for not needing a
barrier there, but I'm not very convinced of that --- the fact
that the load of bgw_notify_pid is in the caller doesn't seem
to guarantee no memory ordering problem. So patch 9.6 too.
It's likely that this doesn't fix any observable bug on Intel
hardware, but machines with weaker memory ordering rules could
have problems here.
Discussion: https://postgr.es/m/4046084.1620244003@sss.pgh.pa.us
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Add a defensive "can't happen" error to code that handles nbtree posting
list splits (promote an existing assertion). This avoids a segfault in
the event of an insertion of a newitem that is somehow identical to an
existing non-pivot tuple in the index. An nbtree index should never
have two index tuples with identical TIDs.
This scenario is not particular unlikely in the event of any kind of
corruption that leaves the index in an inconsistent state relative to
the heap relation that is indexed. There are two known reports of
preventable hard crashes. Doing nothing seems unacceptable given the
general expectation that nbtree will cope reasonably well with corrupt
data.
Discussion: https://postgr.es/m/CAH2-Wz=Jr_d-dOYEEmwz0-ifojVNWho01eAqewfQXgKfoe114w@mail.gmail.com
Backpatch: 13-, where nbtree deduplication was introduced.
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Formerly we just relied on operator classes that assert longValuesOK
to eventually shorten the leaf value enough to fit on an index page.
That fails since the introduction of INCLUDE-column support (commit
09c1c6ab4), because the INCLUDE columns might alone take up more
than a page, meaning no amount of leaf-datum compaction will get
the job done. At least with spgtextproc.c, that leads to an infinite
loop, since spgtextproc.c won't throw an error for not being able
to shorten the leaf datum anymore.
To fix without breaking cases that would otherwise work, add logic
to spgdoinsert() to verify that the leaf tuple size is decreasing
after each "choose" step. Some opclasses might not decrease the
size on every single cycle, and in any case, alignment roundoff
of the tuple size could obscure small gains. Therefore, allow
up to 10 cycles without additional savings before throwing an
error. (Perhaps this number will need adjustment, but it seems
quite generous right now.)
As long as we've developed this logic, let's back-patch it.
The back branches don't have INCLUDE columns to worry about, but
this seems like a good defense against possible bugs in operator
classes. We already know that an infinite loop here is pretty
unpleasant, so having a defense seems to outweigh the risk of
breaking things. (Note that spgtextproc.c is actually the only
known opclass with longValuesOK support, so that this is all moot
for known non-core opclasses anyway.)
Per report from Dilip Kumar.
Discussion: https://postgr.es/m/CAFiTN-uxP_soPhVG840tRMQTBmtA_f_Y8N51G7DKYYqDh7XN-A@mail.gmail.com
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Knowing that a buggy opclass could cause an infinite insertion loop,
spgdoinsert() intended to allow its loop to be interrupted by query
cancel. However, that never actually worked, because in iterations
after the first, we'd be holding buffer lock(s) which would cause
InterruptHoldoffCount to be positive, preventing servicing of the
interrupt.
To fix, check if an interrupt is pending, and if so fall out of
the insertion loop and service the interrupt after we've released
the buffers. If it was indeed a query cancel, that's the end of
the matter. If it was a non-canceling interrupt reason, make use
of the existing provision to retry the whole insertion. (This isn't
as wasteful as it might seem, since any upper-level index tuples we
already created should be usable in the next attempt.)
While there's no known instance of such a bug in existing release
branches, it still seems like a good idea to back-patch this to
all supported branches, since the behavior is fairly nasty if a
loop does happen --- not only is it uncancelable, but it will
quickly consume memory to the point of an OOM failure. In any
case, this code is certainly not working as intended.
Per report from Dilip Kumar.
Discussion: https://postgr.es/m/CAFiTN-uxP_soPhVG840tRMQTBmtA_f_Y8N51G7DKYYqDh7XN-A@mail.gmail.com
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Split up CHECK_FOR_INTERRUPTS() to provide an additional macro
INTERRUPTS_PENDING_CONDITION(), which just tests whether an
interrupt is pending without attempting to service it. This is
useful in situations where the caller knows that interrupts are
blocked, and would like to find out if it's worth the trouble
to unblock them.
Also add INTERRUPTS_CAN_BE_PROCESSED(), which indicates whether
CHECK_FOR_INTERRUPTS() can be relied on to clear the pending interrupt.
This commit doesn't actually add any uses of the new macros,
but a follow-on bug fix will do so. Back-patch to all supported
branches to provide infrastructure for that fix.
Alvaro Herrera and Tom Lane
Discussion: https://postgr.es/m/20210513155351.GA7848@alvherre.pgsql
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This explains the new behavior introduced by 0827e8af70f4 as well as
preexisting.
Author: Justin Pryzby <pryzby@telsasoft.com>
Author: Álvaro Herrera <alvherre@alvh.no-ip.org>
Discussion: https://postgr.es/m/20210423180152.GA17270@telsasoft.com
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Reported-by: Justin Pryzby
Discussion: https://postgr.es/m/20210514020141.GQ27406@telsasoft.com
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This seems to be leftover from ea15e1867 and from when we used to evaluate
SRFs at each node.
Since there is an unconditional "return" at the end of the loop body, only
1 loop is ever possible, so we can just change this into an if condition.
There is no actual bug being fixed here so no back-patch. It seems fine to
just fix this anomaly in master only.
Author: Greg Nancarrow
Discussion: https://postgr.es/m/CAJcOf-d7T1q0az-D8evWXnsuBZjigT04WkV5hCAOEJQZRWy28w@mail.gmail.com
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The percentage of blocks from the table value reported by autovacuum log
output (following commit 5100010ee4d) should never exceed 100% because
it describes the state of the table back when lazy_vacuum() was called.
The value could nevertheless exceed 100% in the event of heap relation
truncation. We failed to compensate for how truncation affects
rel_pages.
Fix the faulty accounting by using the original rel_pages value instead
of the current/final rel_pages value.
Reported-By: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/20210423204306.5osfpkt2ggaedyvy@alap3.anarazel.de
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Make sample like_regex match string values of the root object instead of the
whole document. The corrected example seems to represent a more relevant
use case.
Backpatch to 12, when jsonpath was introduced.
Discussion: https://postgr.es/m/13440f8b-4c1f-5875-c8e3-f3f65606af2f%40xs4all.nl
Author: Erik Rijkers
Reviewed-by: Michael Paquier, Alexander Korotkov
Backpatch-through: 12
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Commits 27e1f1456 and 86dc90056, which were independently discussed,
cause a crash when executing an inherited foreign UPDATE/DELETE query
with asynchronous execution enabled, where children of an Append node
that is the direct/indirect child of the ModifyTable node are rewritten
so as to modify foreign tables directly by postgresPlanDirectModify();
as in that case the direct modifications are executed asynchronously,
which is not currently supported by asynchronous execution. Fix by
disabling asynchronous execution of the direct modifications in that
function.
Author: Etsuro Fujita
Reviewed-by: Amit Langote
Discussion: https://postgr.es/m/CAPmGK158e9sJOfuWxfn%2B0ynrspXQU3JhNjSCbaoeSzMvnga%2Bbw%40mail.gmail.com
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Some of the tests were not considering that the slot's spill stats could be
received by the stats collector after we have reset the stats. Remove
those tests and don't check total bytes decoded and sent to output plugin
in the spilled stats test as we can send the spilled stats to the stats
collector before actually sending the changes to output plugin.
Reported-by: Tom Lane as per buildfarm
Author: Vignesh C, Sawada Masahiko
Reviewed-by: Amit Kapila
Discussion: https://postgr.es/m/20210319185247.ldebgpdaxsowiflw@alap3.anarazel.de
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When specified directly as DML queries, INSERT was not getting always
completed to "INSERT INTO", same for DELETE with "DELETE FROM". This
makes the completion behavior more consistent for both commands, saving
a few keystrokes.
Commands on policies, triggers, grant/revoke, etc. require only DELETE
as completion keyword.
Author: Haiying Tang
Reviewed-by: Dilip Kumar, Julien Rouhaud
Discussion: https://postgr.es/m/OS0PR01MB61135AE2B07CCD1AB8C6A0F6FB549@OS0PR01MB6113.jpnprd01.prod.outlook.com
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The worker.c global wrconn is only meant to be used by logical apply/
tablesync workers, but there are other variables with the same name. To
reduce future confusion rename the global from "wrconn" to
"LogRepWorkerWalRcvConn".
While this is just cosmetic, it seems better to backpatch it all the way
back to 10 where this code appeared, to avoid future backpatching
issues.
Author: Peter Smith <smithpb2250@gmail.com>
Discussion: https://postgr.es/m/CAHut+Pu7Jv9L2BOEx_Z0UtJxfDevQSAUW2mJqWU+CtmDrEZVAg@mail.gmail.com
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Previously, any error reported by the backend while reading
system_constraints.sql would report the entire file, not just the
particular command it was working on. (Ask me how I know.) Likewise,
there were chunks of system_functions.sql that would be read as one
command, which would be annoying if anything failed there.
The issue for system_constraints.sql is an oversight in commit
dfb75e478. I didn't try to trace down where the poor formatting
in system_functions.sql started, but it's certainly contrary to
the advice at the head of that file.
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Commit ab596105b neglected to make the docs match the code.
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Run renumber_oids.pl to move high-numbered OIDs down, as per pre-beta
tasks specified by RELEASE_CHANGES. For reference, the command was
./renumber_oids.pl --first-mapped-oid 8000 --target-oid 6150
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Also "make reformat-dat-files".
The only change worthy of note is that pgindent messed up the formatting
of launcher.c's struct LogicalRepWorkerId, which led me to notice that
that struct wasn't used at all anymore, so I just took it out.
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The section of the code in charge of returning all the relations
associated to a subscription only need one ScanKey, but allocated two of
them. This code was introduced as a copy-paste from a different area on
the same file by 7c4f524, making the result confusing to follow.
Author: Peter Smith
Reviewed-by: Tom Lane, Julien Rouhaud, Bharath Rupireddy
Discussion: https://postgr.es/m/CAHut+PsLKe+rN3FjchoJsd76rx2aMsFTB7CTFxRgUP05p=kcpQ@mail.gmail.com
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EXPLAIN ANALYZE for an async-capable ForeignScan node associated with
postgres_fdw is done just by using instrumentation for ExecProcNode()
called from the node's callbacks, causing the following problems:
1) If the remote table to scan is empty, the node is incorrectly
considered as "never executed" by the command even if the node is
executed, as ExecProcNode() isn't called from the node's callbacks at
all in that case.
2) The command fails to collect timings for things other than
ExecProcNode() done in the node, such as creating a cursor for the
node's remote query.
To fix these problems, add instrumentation for async-capable nodes, and
modify postgres_fdw accordingly.
My oversight in commit 27e1f1456.
While at it, update a comment for the AsyncRequest struct in execnodes.h
and the documentation for the ForeignAsyncRequest API in fdwhandler.sgml
to match the code in ExecAsyncAppendResponse() in nodeAppend.c, and fix
typos in comments in nodeAppend.c.
Per report from Andrey Lepikhov, though I didn't use his patch.
Reviewed-by: Andrey Lepikhov
Discussion: https://postgr.es/m/2eb662bb-105d-fc20-7412-2f027cc3ca72%40postgrespro.ru
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Several queries in the privileges regression test cause the planner
to apply the plpgsql function "leak()" to every element of the
histogram for atest12.b. Since commit 0c882e52a increased the size
of that histogram to 10000 entries, the test invokes that function
over 100000 times, which takes an absolutely unreasonable amount of
time in clobber-cache-always mode.
However, there's no real reason why that has to be a plpgsql
function: for the purposes of this test, all that matters is that
it not be marked leakproof. So we can replace the plpgsql
implementation with a direct call of int4lt, which has the same
behavior and is orders of magnitude faster. This is expected to
cut several hours off the buildfarm cycle time for CCA animals.
It has some positive impact in normal builds too, though that's
probably lost in the noise.
Back-patch to v13 where 0c882e52a came in.
Discussion: https://postgr.es/m/575884.1620626638@sss.pgh.pa.us
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Previously long was used as the data type for some counters in BufferUsage
and WalUsage. But long is only four byte, e.g., on Windows, and it's entirely
possible to wrap a four byte counter. For example, emitting more than
four billion WAL records in one transaction isn't actually particularly rare.
To avoid the overflows of those counters, this commit changes the data type
of them from long to int64.
Suggested-by: Andres Freund
Author: Masahiro Ikeda
Reviewed-by: Fujii Masao
Discussion: https://postgr.es/m/20201221211650.k7b53tcnadrciqjo@alap3.anarazel.de
Discussion: https://postgr.es/m/af0964ac-7080-1984-dc23-513754987716@oss.nttdata.com
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Use a static prolog file instead of generating the prolog from the
existing perl script. Also, support generation of the file in a vpath
build.
Discussion: https://postgr.es/m/700620.1620662868@sss.pgh.pa.us
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I copied the existing spelling of "--max_connections", but
that's just wrong :-(. Evidently setting $ENV{MAX_CONNECTIONS}
has never actually worked in this script. Given the lack of
complaints, it's probably not worth back-patching a fix.
Per buildfarm.
Discussion: https://postgr.es/m/899209.1620759506@sss.pgh.pa.us
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Having to maintain two lists of regression test scripts has proven
annoyingly error-prone. We can achieve the effect of the
serial_schedule by running the parallel_schedule with
"--max_connections=1"; so do that and remove serial_schedule.
This causes cosmetic differences in the progress output, but it
doesn't seem worth restructuring pg_regress to avoid that.
Discussion: https://postgr.es/m/899209.1620759506@sss.pgh.pa.us
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opr_sanity's binary_coercible() function has always been meant
to match the parser's notion of binary coercibility, but it also
has always been a rather poor approximation of the parser's
real rules (as embodied in IsBinaryCoercible()). That hasn't
bit us so far, but it's predictable that it will eventually.
It also now emerges that implementing this check in plpgsql
performs absolutely horribly in clobber-cache-always testing.
(Perhaps we could do something about that, but I suspect it just
means that plpgsql is exploiting catalog caching to the hilt.)
Hence, let's replace binary_coercible() with a C shim that directly
invokes IsBinaryCoercible(), eliminating both the semantic hazard
and the performance issue.
Most of regress.c's C functions are declared in create_function_1,
but we can't simply move that to before opr_sanity/type_sanity
since those tests would complain about the resulting shell types.
I chose to split it into create_function_0 and create_function_1.
Since create_function_0 now runs as part of a parallel group while
create_function_1 doesn't, reduce the latter to create just those
functions that opr_sanity and type_sanity would whine about.
To make room for create_function_0 in the second parallel group
of tests, move tstypes to the third parallel group.
In passing, clean up some ordering deviations between
parallel_schedule and serial_schedule.
Discussion: https://postgr.es/m/292305.1620503097@sss.pgh.pa.us
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The note is no longer true as of 86dc90056, so remove it.
Author: Amit Langote
Discussion: https://postgr.es/m/CA+HiwqFxQn7Hz1wT+wYgnf_9SK0c4BwOOwFFT8jcSZwJrd8HEA@mail.gmail.com
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Since its introduction in bbe0a81, compression of table data supports
LZ4, but nothing had been done within the MSVC scripts to allow users to
build the code with this library.
This commit closes the gap by extending the MSVC scripts to be able to
build optionally with LZ4. Getting libraries that can be used for
compilation and execution is possible as LZ4 can be compiled down to
MSVC 2010 using its source tarball. MinGW may require extra efforts to
be able to work, and I have been able to test this only with MSVC, still
this is better than nothing to give users a way to test the feature on
Windows.
Author: Dilip Kumar
Reviewed-by: Michael Paquier
Discussion: https://postgr.es/m/YJPdNeF68XpwDDki@paquier.xyz
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It's unusual to have any resjunk columns in an ON CONFLICT ... UPDATE
list, but it can happen when MULTIEXPR_SUBLINK SubPlans are present.
If it happens, the ON CONFLICT UPDATE code path would end up storing
tuples that include the values of the extra resjunk columns. That's
fairly harmless in the short run, but if new columns are added to
the table then the values would become accessible, possibly leading
to malfunctions if they don't match the datatypes of the new columns.
This had escaped notice through a confluence of missing sanity checks,
including
* There's no cross-check that a tuple presented to heap_insert or
heap_update matches the table rowtype. While it's difficult to
check that fully at reasonable cost, we can easily add assertions
that there aren't too many columns.
* The output-column-assignment cases in execExprInterp.c lacked
any sanity checks on the output column numbers, which seems like
an oversight considering there are plenty of assertion checks on
input column numbers. Add assertions there too.
* We failed to apply nodeModifyTable's ExecCheckPlanOutput() to
the ON CONFLICT UPDATE tlist. That wouldn't have caught this
specific error, since that function is chartered to ignore resjunk
columns; but it sure seems like a bad omission now that we've seen
this bug.
In HEAD, the right way to fix this is to make the processing of
ON CONFLICT UPDATE tlists work the same as regular UPDATE tlists
now do, that is don't add "SET x = x" entries, and use
ExecBuildUpdateProjection to evaluate the tlist and combine it with
old values of the not-set columns. This adds a little complication
to ExecBuildUpdateProjection, but allows removal of a comparable
amount of now-dead code from the planner.
In the back branches, the most expedient solution seems to be to
(a) use an output slot for the ON CONFLICT UPDATE projection that
actually matches the target table, and then (b) invent a variant of
ExecBuildProjectionInfo that can be told to not store values resulting
from resjunk columns, so it doesn't try to store into nonexistent
columns of the output slot. (We can't simply ignore the resjunk columns
altogether; they have to be evaluated for MULTIEXPR_SUBLINK to work.)
This works back to v10. In 9.6, projections work much differently and
we can't cheaply give them such an option. The 9.6 version of this
patch works by inserting a JunkFilter when it's necessary to get rid
of resjunk columns.
In addition, v11 and up have the reverse problem when trying to
perform ON CONFLICT UPDATE on a partitioned table. Through a
further oversight, adjust_partition_tlist() discarded resjunk columns
when re-ordering the ON CONFLICT UPDATE tlist to match a partition.
This accidentally prevented the storing-bogus-tuples problem, but
at the cost that MULTIEXPR_SUBLINK cases didn't work, typically
crashing if more than one row has to be updated. Fix by preserving
resjunk columns in that routine. (I failed to resist the temptation
to add more assertions there too, and to do some minor code
beautification.)
Per report from Andres Freund. Back-patch to all supported branches.
Security: CVE-2021-32028
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While we were (mostly) careful about ensuring that the dimensions of
arrays aren't large enough to cause integer overflow, the lower bound
values were generally not checked. This allows situations where
lower_bound + dimension overflows an integer. It seems that that's
harmless so far as array reading is concerned, except that array
elements with subscripts notionally exceeding INT_MAX are inaccessible.
However, it confuses various array-assignment logic, resulting in a
potential for memory stomps.
Fix by adding checks that array lower bounds aren't large enough to
cause lower_bound + dimension to overflow. (Note: this results in
disallowing cases where the last subscript position would be exactly
INT_MAX. In principle we could probably allow that, but there's a lot
of code that computes lower_bound + dimension and would need adjustment.
It seems doubtful that it's worth the trouble/risk to allow it.)
Somewhat independently of that, array_set_element() was careless
about possible overflow when checking the subscript of a fixed-length
array, creating a different route to memory stomps. Fix that too.
Security: CVE-2021-32027
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Source-Git-URL: git://git.postgresql.org/git/pgtranslation/messages.git
Source-Git-Hash: 1c361d3ac016b61715d99f2055dee050397e3f13
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When building without --enable-dtrace, emit dummy
do {} while (0)
statements for the stubbed-out TRACE_POSTGRESQL_foo() macros
instead of empty macros that totally elide the original probe
statement.
This fixes the
warning: suggest braces around empty body in an ‘if’ statement [-Wempty-body]
introduced by b94409a02f.
Author: Craig Ringer <craig.ringer@2ndquadrant.com>
Discussion: https://www.postgresql.org/message-id/flat/20210504221531.cfvpmmdfsou6eitb%40alap3.anarazel.de
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Was present in original commit
198b3716dba68544b55cb97bd120738a86d5df2d but apparently never used.
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Author: Kyotaro Horiguchi, Justin Pryzby
Discussion: https://postgr.es/m/20210428.173633.1525059946206239295.horikyota.ntt@gmail.com
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"make dist", in charge of creating a distribution tarball, failed when
attempting to generate ./INSTALL as a new reference added to
guc-default-toast-compression on the documentation for the installation
details was not getting translated properly to plain text. Like all the
other link references on this page, this adds a new entry to
standalone-profile.xsl to allow the generation of ./INSTALL to finish
properly.
Oversight in 02a93e7, per buildfarm member guaibasaurus.
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This set of commits has some bugs with known fixes, but at this late
stage in the release cycle it seems best to revert and resubmit next
time, along with some new automated test coverage for this whole area.
Commits reverted:
dc88460c: Doc: Review for "Optionally prefetch referenced data in recovery."
1d257577: Optionally prefetch referenced data in recovery.
f003d9f8: Add circular WAL decoding buffer.
323cbe7c: Remove read_page callback from XLogReader.
Remove the new GUC group WAL_RECOVERY recently added by a55a9847, as the
corresponding section of config.sgml is now reverted.
Discussion: https://postgr.es/m/CAOuzzgrn7iKnFRsB4MHp3UisEQAGgZMbk_ViTN4HV4-Ksq8zCg%40mail.gmail.com
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Some relations with LZ4 used as the toast compression methods have been
left around in the main regression test suite to stress pg_upgrade, but
pg_dump, that includes tests much more picky in terms of output
generated, had no actual coverage with this feature.
Similarly to collations, tests only working with LZ4 are tracked with an
additional flag, and this uses TestLib::check_pg_config() to check if
the build supports LZ4 or not. This stresses more scenarios with
tables, materialized views and pg_dump --no-toast-compression.
Author: Dilip Kumar
Reviewed-by: Michael Paquier
Discussion: https://postgr.es/m/CAFiTN-twgPmohG7qj1HXhySq16h123y5OowsQR+5h1YeZE9fmQ@mail.gmail.com
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