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Previously it was unclear how COPY FROM handled cases where not all
columns were specified, or if the order didn't match.
Reported-by: [email protected]
Discussion: https://postgr.es/m/[email protected]
Backpatch-through: 9.4
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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/[email protected]
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Currently postgres_fdw doesn't permit a non-superuser to connect to a
foreign server without specifying a password, or to use an
authentication mechanism that doesn't use the password. This is to avoid
using the settings and identity of the user running Postgres.
However, this doesn't make sense for all authentication methods. We
therefore allow a superuser to set "password_required 'false'" for user
mappings for the postgres_fdw. The superuser must ensure that the
foreign server won't try to rely solely on the server identity (e.g.
trust, peer, ident) or use an authentication mechanism that relies on the
password settings (e.g. md5, scram-sha-256).
This feature is a prelude to better support for sslcert and sslkey
settings in user mappings.
Author: Craig Ringer.
Discussion: https://postgr.es/m/[email protected]
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A new function EmitProcSignalBarrier() can be used to emit a global
barrier which all backends that participate in the ProcSignal
mechanism must absorb, and a new function WaitForProcSignalBarrier()
can be used to wait until all relevant backends have in fact
absorbed the barrier.
This can be used to coordinate global state changes, such as turning
checksums on while the system is running.
There's no real client of this mechanism yet, although two are
proposed, but an enum has to have at least one element, so this
includes a placeholder type (PROCSIGNAL_BARRIER_PLACEHOLDER) which
should be replaced by the first real client of this mechanism to
get committed.
Andres Freund and Robert Haas, reviewed by Daniel Gustafsson and,
in earlier versions, by Magnus Hagander.
Discussion: http://postgr.es/m/CA+TgmoZwDk=BguVDVa+qdA6SBKef=PKbaKDQALTC_9qoz1mJqg@mail.gmail.com
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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
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That's more consistent with the style we have been using with for
example EXPLAIN, VACUUM or ANALYZE (this one had only one option in
v11). Based on a suggestion from Pavel Stehule.
Author: Josef Šimánek
Discussion: https://postgr.es/m/CAFj8pRCrUS+eMFvssVPGZN-VDEMP3XN+1Dop0=CmeBq2D+dqOg@mail.gmail.com
Discussion: https://postgr.es/m/CAFp7QwpeMPEtAR5AYpsG623ooMWX03wMjq5cpZn=X+6OCkfwJw@mail.gmail.com
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This makes such log entries more useful, since the cause of the error
can be dependent on the parameter values.
Author: Alexey Bashtanov, Álvaro Herrera
Discussion: https://postgr.es/m/[email protected]
Reviewed-by: Peter Eisentraut, Andres Freund, Tom Lane
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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
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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/[email protected]
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Tatsuo Ishii complained that this para wasn't very intelligible.
Try to make it better.
Discussion: https://postgr.es/m/[email protected]
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This partially reverts commit 4dc6355210.
The information returned by the function can be obtained by calling
PQconninfo(), so the function is redundant.
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Change default of ssl_min_protocol_version to TLSv1.2 (from TLSv1,
which means 1.0). Older versions are still supported, just not by
default.
TLS 1.0 is widely deprecated, and TLS 1.1 only slightly less so. All
OpenSSL versions that support TLS 1.1 also support TLS 1.2, so there
would be very little reason to, say, set the default to TLS 1.1
instead on grounds of better compatibility.
The test suite overrides this new setting, so it can still run with
older OpenSSL versions.
Discussion: https://www.postgresql.org/message-id/flat/b327f8df-da98-054d-0cc5-b76a857cfed9%402ndquadrant.com
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This patch providies for support for password protected SSL client
keys in libpq, and for DER format keys, both encrypted and unencrypted.
There is a new connection parameter sslpassword, which is supplied to
the OpenSSL libraries via a callback function. The callback function can
also be set by an application by calling PQgetSSLKeyPassHook(). There is
also a function to retreive the connection setting, PQsslpassword().
Craig Ringer and Andrew Dunstan
Reviewed by: Greg Nancarrow
Discussion: https://postgr.es/m/[email protected]
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Make allow_system_table_mods settable at run time by superusers. It
was previously postmaster start only.
We don't want to make system catalog DDL wide-open, but there are
occasionally useful things to do like setting reloptions or statistics
on a busy system table, and blocking those doesn't help anyone. Also,
this enables the possibility of writing a test suite for this setting.
Reviewed-by: Tom Lane <[email protected]>
Discussion: https://www.postgresql.org/message-id/flat/8b00ea5e-28a7-88ba-e848-21528b632354%402ndquadrant.com
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This build option was once useful to maintain compatibility with
version-0 functions, but those are no longer supported, so this option
is no longer useful for end users. We keep the option available to
developers in pg_config_manual.h so that it is easy to test the
pass-by-reference code paths without having to fire up a 32-bit
machine.
Discussion: https://www.postgresql.org/message-id/flat/[email protected]
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The user docs didn't really explain how to use LISTEN safely,
so clarify that. Also clean up some fuzzy-headed explanations
in comments. No code changes.
Discussion: https://postgr.es/m/[email protected]
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Back-patch to 10.
Author: Andreas Karlsson
Discussion: https://postgr.es/m/043acae2-a369-b7fa-be48-1933aa2e82d1%40proxel.se
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Up to now, whatever you'd edited was put back into the query buffer
but not redisplayed, which is less than user-friendly. But we can
improve that just by printing the text along with a prompt, if we
enforce that the editing result ends with a newline (which it
typically would anyway). You then continue typing more lines if
you want, or you can type ";" or do \g or \r or another \e.
This is intentionally divorced from readline's processing,
for simplicity and so that it works the same with or without
readline enabled. We discussed possibly integrating things
more closely with readline; but that seems difficult, uncertainly
portable across different readline and libedit versions, and
of limited real benefit anyway. Let's try the simple way and
see if it's good enough.
Patch by me, thanks to Fabien Coelho and Laurenz Albe for review
Discussion: https://postgr.es/m/[email protected]
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This build option was only useful to maintain compatibility for
version-0 functions, but those are no longer supported, so this option
can be removed.
float4 is now always pass-by-value; the pass-by-reference code path is
completely removed.
Discussion: https://www.postgresql.org/message-id/flat/[email protected]
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ALTER TABLE RENAME COLUMN command always can be used to rename the column
in the view, but it's reasonable to add that syntax to ALTER VIEW too.
Author: Fujii Masao
Reviewed-by: Ibrar Ahmed, Yu Kimura
Discussion: https://postgr.es/m/CAHGQGwHoQMD3b-MqTLcp1MgdhCpOKU7QNRwjFooT4_d+ti5v6g@mail.gmail.com
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This adds the statistics about transactions spilled to disk from
ReorderBuffer. Users can query the pg_stat_replication view to check
these stats.
Author: Tomas Vondra, with bug-fixes and minor changes by Dilip Kumar
Reviewed-by: Amit Kapila
Discussion: https://postgr.es/m/[email protected]
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In particular, clarify that the role membership mechanism allows
members to inherit the ownership privileges of an object's owning
role.
Laurenz Albe, with some kibitzing by me
Discussion: https://postgr.es/m/[email protected]
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Author: Daniel Gustafsson <[email protected]>
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Specifying '-f' will add the 'force' option to the DROP DATABASE command
sent to the server. This will try to terminate all existing connections
to the target database before dropping it.
Author: Pavel Stehule
Reviewed-by: Vignesh C and Amit Kapila
Discussion: https://postgr.es/m/CAP_rwwmLJJbn70vLOZFpxGw3XD7nLB_7+NKz46H5EOO2k5H7OQ@mail.gmail.com
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Discussion: https://postgr.es/m/20191119.222048.49467220816510881.t-ishii%40sraoss.co.jp
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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/[email protected]
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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/[email protected]
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Keep track of the visible width of PROMPT1, and provide %w as a way
for PROMPT2 to generate the same number of spaces.
Author: Thomas Munro, with ideas from others
Reviewed-by: Tom Lane (earlier version)
Discussion: https://postgr.es/m/CA%2BhUKG%2BzGd7RigjWbxwhzGW59gUpf76ydQECeGdEdodH6nd__A%40mail.gmail.com
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Instead of deciding to serialize a transaction merely based on the
number of changes in that xact (toplevel or subxact), this makes
the decisions based on amount of memory consumed by the changes.
The memory limit is defined by a new logical_decoding_work_mem GUC,
so for example we can do this
SET logical_decoding_work_mem = '128kB'
to reduce the memory usage of walsenders or set the higher value to
reduce disk writes. The minimum value is 64kB.
When adding a change to a transaction, we account for the size in
two places. Firstly, in the ReorderBuffer, which is then used to
decide if we reached the total memory limit. And secondly in the
transaction the change belongs to, so that we can pick the largest
transaction to evict (and serialize to disk).
We still use max_changes_in_memory when loading changes serialized
to disk. The trouble is we can't use the memory limit directly as
there might be multiple subxact serialized, we need to read all of
them but we don't know how many are there (and which subxact to
read first).
We do not serialize the ReorderBufferTXN entries, so if there is a
transaction with many subxacts, most memory may be in this type of
objects. Those records are not included in the memory accounting.
We also do not account for INTERNAL_TUPLECID changes, which are
kept in a separate list and not evicted from memory. Transactions
with many CTID changes may consume significant amounts of memory,
but we can't really do much about that.
The current eviction algorithm is very simple - the transaction is
picked merely by size, while it might be useful to also consider age
(LSN) of the changes for example. With the new Generational memory
allocator, evicting the oldest changes would make it more likely
the memory gets actually pfreed.
The logical_decoding_work_mem can be set in postgresql.conf, in which
case it serves as the default for all publishers on that instance.
Author: Tomas Vondra, with changes by Dilip Kumar and Amit Kapila
Reviewed-by: Dilip Kumar and Amit Kapila
Tested-By: Vignesh C
Discussion: https://postgr.es/m/[email protected]
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Apparently, it's no longer welcome. Therefore replace it with "pristine",
and add some explanatory text while at it.
Reported by Brian Williams
Discussion: https://postgr.es/m/[email protected]
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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/[email protected]
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This new option terminates the other sessions connected to the target
database and then drop it. To terminate other sessions, the current user
must have desired permissions (same as pg_terminate_backend()). We don't
allow to terminate the sessions if prepared transactions, active logical
replication slots or subscriptions are present in the target database.
Author: Pavel Stehule with changes by me
Reviewed-by: Dilip Kumar, Vignesh C, Ibrar Ahmed, Anthony Nowocien,
Ryan Lambert and Amit Kapila
Discussion: https://postgr.es/m/CAP_rwwmLJJbn70vLOZFpxGw3XD7nLB_7+NKz46H5EOO2k5H7OQ@mail.gmail.com
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As suggested by Stephen Frost.
Discussion: https://postgr.es/m/[email protected]
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The example of expansion of multiple views claimed that the resulting
subquery nest would not get fully flattened because of an aggregate
function. There's no aggregate in the example, though, only a user
defined function confusingly named MIN(). In a modern server, the
reason for the non-flattening is that MIN() is volatile, but I'm
unsure whether that was true back when this text was written.
Let's reduce the confusion level by using LEAST() instead (which
we didn't have at the time this example was created). And then
we can just say that the planner will flatten the sub-queries, so
the rewrite system doesn't have to.
Noted by Paul Jungwirth. This text is old enough to vote, so
back-patch to all supported branches.
Discussion: https://postgr.es/m/CA+renyXZFnmp9PcvX1EVR2dR=XG5e6E-AELr8AHCNZ8RYrpnPw@mail.gmail.com
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The previous statement that using a passphrase disables the ability to
change the server's SSL configuration without a server restart was no
longer completely true since the introduction of
ssl_passphrase_command_supports_reload.
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Remove one sentence that was deemed misleading.
Discussion: https://www.postgresql.org/message-id/flat/E1iEgSp-0004R5-2E%40gemulon.postgresql.org
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Add some support for automatically showing backtraces in certain error
situations in the server. Backtraces are shown on assertion failure;
also, a new setting backtrace_functions can be set to a list of C
function names, and all ereport()s and elog()s from the mentioned
functions will have backtraces generated. Finally, the function
errbacktrace() can be manually added to an ereport() call to generate a
backtrace for that call.
Authors: Peter Eisentraut, Álvaro Herrera
Discussion: https://postgr.es/m//[email protected]
Discussion: https://postgr.es/m/CAMsr+YGL+yfWE=JvbUbnpWtrRZNey7hJ07+zT4bYJdVp4Szdrg@mail.gmail.com
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Currently, postgres_fdw does not support preparing a remote transaction
for two-phase commit even in the case where the remote transaction is
read-only, but the old error message appeared to imply that that was not
supported only if the remote transaction modified remote tables. Change
the message so as to include the case where the remote transaction is
read-only.
Also fix a comment above the message.
Also add a note about the lack of supporting PREPARE TRANSACTION to the
postgres_fdw documentation.
Reported-by: Gilles Darold
Author: Gilles Darold and Etsuro Fujita
Reviewed-by: Michael Paquier and Kyotaro Horiguchi
Backpatch-through: 9.4
Discussion: https://postgr.es/m/08600ed3-3084-be70-65ba-279ab19618a5%40darold.net
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The point is that DELETE triggers cannot modify any values.
Reported-by: Eugen Konkov
Discussion: https://postgr.es/m/[email protected]
Backpatch-through: 9.4
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This allows logging a sample of statements, without incurring excessive
log traffic (which may impact performance). This can be useful when
analyzing workloads with lots of short queries.
The sampling is configured using two new GUC parameters:
* log_min_duration_sample - minimum required statement duration
* log_statement_sample_rate - sample rate (0.0 - 1.0)
Only statements with duration exceeding log_min_duration_sample are
considered for sampling. To enable sampling, both those GUCs have to
be set correctly.
The existing log_min_duration_statement GUC has a higher priority, i.e.
statements with duration exceeding log_min_duration_statement will be
always logged, irrespectedly of how the sampling is configured. This
means only configurations
log_min_duration_sample < log_min_duration_statement
do actually sample the statements, instead of logging everything.
Author: Adrien Nayrat
Reviewed-by: David Rowley, Vik Fearing, Tomas Vondra
Discussion: https://postgr.es/m/[email protected]
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The docs do say which GUCs can be changed only by superusers, but we
forgot to mention this for the new log_transaction_sample_rate. This
GUC was introduced in PostgreSQL 12, so backpatch accordingly.
Author: Adrien Nayrat
Backpatch-through: 12
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Since commit d26a810eb, we've defined bool as being either _Bool from
<stdbool.h>, or "unsigned char"; but that commit overlooked the fact
that probes.d has "#define bool char". For consistency, make it say
"unsigned char" instead. This should be strictly a cosmetic change,
but it seems best to be in sync.
Formally, in the now-normal case where we're using <stdbool.h>, it'd
be better to write "#define bool _Bool". However, then we'd need
some build infrastructure to inject that configuration choice into
probes.d, and it doesn't seem worth the trouble. We only use
<stdbool.h> if sizeof(_Bool) is 1, so having DTrace think that
bool parameters are "unsigned char" should be close enough.
Back-patch to v12 where d26a810eb came in.
Discussion: https://postgr.es/m/CAA4eK1LmaKO7Du9M9Lo=kxGU8sB6aL8fa3sF6z6d5yYYVe3BuQ@mail.gmail.com
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This commit allows --init-steps option in pgbench to accept "G" character
meaning server-side data generation as an initialization step.
With "G", only limited queries are sent from pgbench client and
then data is actually generated in the server. This might make
the initialization phase faster if the bandwidth between pgbench client
and the server is low.
Author: Fabien Coelho
Reviewed-by: Anna Endo, Ibrar Ahmed, Fujii Masao
Discussion: https://postgr.es/m/alpine.DEB.2.21.1904061826420.3678@lancre
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Reported-by: [email protected]
Discussion: https://postgr.es/m/[email protected]
Backpatch-through: 9.4
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Since 898e5e32, this command uses partially ShareUpdateExclusiveLock,
but the docs did not get the call.
Author: Justin Pryzby
Reviewed-by: Amit Langote, Álvaro Herrera, Michael Paquier
Discussion: https://postgr.es/m/[email protected]
Backpatch-through: 12
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This clarifies more how to use and how to take advantage of constraints
when attaching a new partition.
Author: Justin Pryzby
Reviewed-by: Amit Langote, Álvaro Herrera, Michael Paquier
Discussion: https://postgr.es/m/[email protected]
Backpatch-through: 10
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There is a step to track when the new heap is written, but this was
missing in the documentation.
Author: Noriyoshi Shinoda
Discussion: https://postgr.es/m/AT5PR8401MB06447FAE88E1592754E958B8EE640@AT5PR8401MB0644.NAMPRD84.PROD.OUTLOOK.COM
Backpatch-through: 12
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When we added the GUC units feature, we didn't make any great effort
to adjust the documentation of individual GUCs; they tended to still
say things like "this is the number of milliseconds that ...", even
though users might prefer to write some other units, and SHOW might
even show the value in other units. Commit 6c9fb69f2 made an effort
to improve this situation, but I thought it made things less readable
by injecting units information in mid-sentence. It also wasn't very
consistent, and did not touch all the GUCs that have units.
To improve matters, standardize on the phrasing "If this value is
specified without units, it is taken as <units>". Also, try to
standardize where this is mentioned, right before the specification
of the default. (In a couple of places, doing that would've required
more rewriting than seemed justified, so I wasn't 100% consistent
about that.) I also tried to use the phrases "amount of time",
"amount of memory", etc rather than describing the contents of GUCs
in other ways, as those were the majority usage in places that weren't
overcommitting to a particular unit. (I left "length of time" alone
in a couple of places, though.)
I failed to resist the temptation to copy-edit some awkward text, too.
Backpatch to v12, like 6c9fb69f2, mainly because v12 hasn't diverged
much from HEAD yet.
Discussion: https://postgr.es/m/[email protected]
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Remove SQL_LANGUAGES, which was eliminated in SQL:2008, and
SQL_PACKAGES and SQL_SIZING_PROFILES, which were eliminated in
SQL:2011. Since they were dropped by the SQL standard, the
information in them was no longer updated and therefore no longer
useful.
This also removes the feature-package association information in
sql_feature_packages.txt, but for the time begin we are keeping the
information which features are in the Core package (that is, mandatory
SQL features). Maybe at some point someone wants to invent a way to
store that that does not involve using the "package" mechanism
anymore.
Discussion https://www.postgresql.org/message-id/flat/91334220-7900-071b-9327-0c6ecd012017%402ndquadrant.com
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