During upgrade, when pg_restore performs CREATE DATABASE, bgwriter or
checkpointer may flush buffers and hold a file handle for pg_largeobject,
so later TRUNCATE pg_largeobject command will fail if OS (such as older
Windows versions) doesn't remove an unlinked file completely till it's
open. The probability of seeing this behavior is higher in this test
because we use wal_level as logical via allows_streaming => 'logical'
which in turn set shared_buffers as 1MB and make it more probable for
bgwriter to hold the file handle.
Diagnosed-by: Alexander Lakhin
Author: Hayato Kuroda, Amit Kapila
Reviewed-by: Alexander Lakhin
Discussion: https://postgr.es/m/TYAPR01MB5866AB7FD922CE30A2565B8BF5A8A@TYAPR01MB5866.jpnprd01.prod.outlook.com
In commit 3e51b278d I (tgl) caused initdb to leave lc_messages and
other lc_xxx GUCs commented-out in the installed postgresql.conf file
if they were going to be set to 'C'. This was a hack for cosmetic
purposes, and it was buggy because lc_messages' wired-in default is
not 'C' but '' (empty string). That led to --no-locale not having
the expected effect, since the postmaster would then obtain
lc_messages from its startup environment.
Let's just revert to the prior behavior of always de-commenting the
lc_xxx entries; the argument for changing that longstanding behavior
was weak in the first place.
Also, fix postgresql.conf.sample's erroneous claim that the default
value of lc_messages is 'C'. I suspect that was what misled me into
making this mistake in the first place.
Report and patch by Kyotaro Horiguchi. Back-patch to v16 where
the problem was introduced.
Discussion: https://postgr.es/m/20231122.162700.1995154567625541112.horikyota.ntt@gmail.com
Many psql backslash commands tolerate trailing semicolons, even
though that's not part of the official syntax. These did not.
They tried to, by passing semicolon = true to psql_scan_slash_option,
but that function ignored this parameter in OT_WHOLE_LINE mode.
Teach it to do the right thing, and remove the now-duplicative
logic in exec_command_help.
Discussion: https://postgr.es/m/2012251.1704746912@sss.pgh.pa.us
These were not testing the same thing as the comparable Assert
in calc_nestloop_required_outer(), because we neglected to map
the given Paths' relids to top-level relids. When considering
a partition child join the latter is the correct thing to do.
This oversight is old, but since it's only an overly-weak Assert
check there doesn't seem to be much value in back-patching.
Richard Guo (with cosmetic changes and comment updates by me)
Discussion: https://postgr.es/m/CAMbWs49sqbe9GBZ8sy8dSfKRNURgicR85HX8vgzcgQsPF0XY1w@mail.gmail.com
Commit 9d9c02ccd, which added the notion of a "run condition" for
window functions, neglected to teach nodeFuncs.c to process the new
field. Remarkably, that doesn't seem to have had any ill effects
before we invented Var.varnullingrels, but now it can cause visible
failures in join-removal scenarios.
I have no faith that there's not reachable problems in v15 too,
so back-patch the code change to v15 where 9d9c02ccd came in.
The test case seems irrelevant to v15, though.
Per bug #18277 from Zuming Jiang. Diagnosis and patch by
Richard Guo.
Discussion: https://postgr.es/m/18277-089ead83b329a2fd@postgresql.org
On Windows, cmd.exe is used to launch the postmaster process to ease its
redirection setup. However, cmd.exe may execute other programs at
startup due to autorun configurations, which could influence the
postmaster startup. This patch adds /D flag to the launcher cmd.exe
command line to disable autorun settings written in the registry.
This is arguably a bug, but no backpatch is done now out of caution.
Reported-by: Hayato Kuroda
Author: Kyotaro Horiguchi
Reviewed-by: Robert Haas, Michael Paquier
Discussion: https://postgr.es/m/20230922.161551.320043332510268554.horikyota.ntt@gmail.com
Both lwlocknames.txt and wait_event_names.txt contain a list of all
the predefined LWLocks, i.e., those with predefined positions
within MainLWLockArray. It is easy to miss one or the other,
especially since the list in wait_event_names.txt omits the "Lock"
suffix from all the LWLock wait events. This commit adds a cross-
check of these lists to the script that generates lwlocknames.h.
If the lists do not match exactly, building will fail.
Suggested-by: Robert Haas
Reviewed-by: Robert Haas, Michael Paquier, Bertrand Drouvot
Discussion: https://postgr.es/m/20240102173120.GA1061678%40nathanxps13
Essentially this moves the non-interactive part of psql's "\password"
command into an exported client function. The password is not sent to the
server in cleartext because it is "encrypted" (in the case of scram and md5
it is actually hashed, but we have called these encrypted passwords for a
long time now) on the client side. This is good because it ensures the
cleartext password is never known by the server, and therefore won't end up
in logs, pg_stat displays, etc.
In other words, it exists for the same reason as PQencryptPasswordConn(), but
is more convenient as it both builds and runs the "ALTER USER" command for
you. PQchangePassword() uses PQencryptPasswordConn() to do the password
encryption. PQencryptPasswordConn() is passed a NULL for the algorithm
argument, hence encryption is done according to the server's
password_encryption setting.
Also modify the psql client to use the new function. That provides a builtin
test case. Ultimately drivers built on top of libpq should expose this
function and its use should be generally encouraged over doing ALTER USER
directly for password changes.
Author: Joe Conway
Reviewed-by: Tom Lane
Discussion: https://postgr.es/m/flat/b75955f7-e8cc-4bbd-817f-ef536bacbe93%40joeconway.com
The target relation for INSERT/UPDATE/DELETE/MERGE has a different behavior
than other relations in EvalPlanQual() and RETURNING clause. This is why we
forbid target relation to be either source or target relation in SJE.
It's not clear if we could ever support this.
Reported-by: Alexander Lakhin
Discussion: https://postgr.es/m/b9e8f460-f9a6-0e9b-e8ba-60d59f0bc22c%40gmail.com
When SJE uses RelOptInfo.unique_for_rels cache, it passes filtered quals to
innerrel_is_unique_ext(). That might lead to an invalid match to cache entries
made by previous non self-join checking calls. Add UniqueRelInfo.self_join
flag to prevent such cases. Also, fix that SJE should require a strict match
of outerrelids to make sure UniqueRelInfo.extra_clauses are valid.
Reported-by: Alexander Lakhin
Discussion: https://postgr.es/m/4788f781-31bd-9796-d7d6-588a751c8787%40gmail.com
This replaces dblink's blocking libpq calls, allowing cancellation and
allowing DROP DATABASE (of a database not involved in the query). Apart
from explicit dblink_cancel_query() calls, dblink still doesn't cancel
the remote side. The replacement for the blocking calls consists of
new, general-purpose query execution wrappers in the libpqsrv facility.
Out-of-tree extensions should adopt these. Use them in postgres_fdw,
replacing a local implementation from which the libpqsrv implementation
derives. This is a bug fix for dblink. Code inspection identified the
bug at least thirteen years ago, but user complaints have not appeared.
Hence, no back-patch for now.
Discussion: https://postgr.es/m/20231122012945.74@rfd.leadboat.com
Since commit 599b33b94, this function assumed that every RTE_RELATION
RangeTblEntry would have an associated RelOptInfo. But that's not so:
we only build RelOptInfos for relations that are scanned by the query.
In particular the target of an INSERT won't have one, so that Vars
appearing in an INSERT ... RETURNING list will not have an associated
RelOptInfo. This apparently wasn't a problem before commit f7816aec2
taught examine_simple_variable() to drill down into CTEs containing
INSERT RETURNING, but it is now.
To fix, add a fallback code path that gets the userid to use directly
from the RTEPermissionInfo associated with the RTE. (Sadly, we must
have two code paths, because not every RTE has a RTEPermissionInfo
either.)
Per report from Alexander Lakhin. No back-patch, since the case is
apparently unreachable before f7816aec2.
Discussion: https://postgr.es/m/608a4886-6c60-0f9e-97d5-591256bd4150@gmail.com
During the calculations of the maximum for the number of buckets, take into
account that later we round that to the next power of 2.
Reported-by: Karen Talarico
Bug: #16925
Discussion: https://postgr.es/m/16925-ec96d83529d0d629%40postgresql.org
Author: Thomas Munro, Andrei Lepikhov, Alexander Korotkov
Reviewed-by: Alena Rybakina
Backpatch-through: 12
When the SJE code handles the transfer of qual clauses from the removed
relation to the remaining one, it replaces the Vars of the removed
relation with the Vars of the remaining relation for each clause, and
then reintegrates these clauses into the appropriate restriction or join
clause lists, while attempting to avoid duplicates.
However, the code compares RestrictInfo->clause to determine if two
clauses are duplicates. This is just flat wrong. Two RestrictInfos
with the same clause can have different required_relids,
incompatible_relids, is_pushed_down, and so on. This can cause qual
clauses to be mistakenly omitted, leading to wrong results.
This patch fixes it by comparing the entire RestrictInfos not just their
clauses ignoring 'rinfo_serial' field (otherwise almost all RestrictInfos will
be unique). Making 'rinfo_serial' equal_ignore would break other code. This
is why this commit implements our own comparison function for checking the
equality of RestrictInfos.
Reported-by: Zuming Jiang
Bug: #18261
Discussion: https://postgr.es/m/18261-2a75d748c928609b%40postgresql.org
Author: Richard Guo
Support referencing a composite-type variable in %TYPE.
Remove the undocumented, untested, and pretty useless ability
to have the subject of %TYPE be an (unqualified) type name.
You get the same result by just not writing %TYPE.
Add or adjust some test cases to improve code coverage here.
Discussion: https://postgr.es/m/716852.1704402127@sss.pgh.pa.us
A typo has been introduced by 31966b151e when updating the state of a
local buffer when a temporary relation is extended, for the case of a
block included in the relation range extended, when it is already found
in the hash table holding the local buffers. In this case, BM_VALID
should be cleared, but the buffer state was changed so as BM_VALID
remained while clearing the other flags.
As reported on the thread, it was possible to corrupt the state of the
local buffers on ENOSPC, but the states would be corrupted on any kind
of ERROR during the relation extend (like partial writes or some other
errno).
Reported-by: Alexander Lakhin
Author: Tender Wang
Reviewed-by: Richard Guo, Alexander Lakhin, Michael Paquier
Discussion: https://postgr.es/m/18259-6e256429825dd435@postgresql.org
Backpatch-through: 16
If we have DECHIST statistics about the argument expression, use
the average number of distinct elements as the array length estimate.
(It'd be better to use the average total number of elements, but
that is not currently calculated by compute_array_stats(), and
it's unclear that it'd be worth extra effort to get.)
To do this, we have to change the signature of estimate_array_length
to pass the "root" pointer. While at it, also change its result
type to "double". That's probably not really necessary, but it
avoids any risk of overflow of the value extracted from DECHIST.
All existing callers are going to use the result in a "double"
calculation anyway.
Paul Jungwirth, reviewed by Jian He and myself
Discussion: https://postgr.es/m/CA+renyUnM2d+SmrxKpDuAdpiq6FOM=FByvi6aS6yi__qyf6j9A@mail.gmail.com
Many foreach loops only use the ListCell pointer to retrieve the
content of the cell, like so:
ListCell *lc;
foreach(lc, mylist)
{
int myint = lfirst_int(lc);
...
}
This commit adds a few convenience macros that automatically
declare the loop variable and retrieve the current cell's contents.
This allows us to rewrite the previous loop like this:
foreach_int(myint, mylist)
{
...
}
This commit also adjusts a few existing loops in order to add
coverage for the new/adjusted macros. There is presently no plan
to bulk update all foreach loops, as that could introduce a
significant amount of back-patching pain. Instead, these macros
are primarily intended for use in new code.
Author: Jelte Fennema-Nio
Reviewed-by: David Rowley, Alvaro Herrera, Vignesh C, Tom Lane
Discussion: https://postgr.es/m/CAGECzQSwXKnxGwW1_Q5JE%2B8Ja20kyAbhBHO04vVrQsLcDciwXA%40mail.gmail.com
This adds a new ALTER TABLE subcommand ALTER COLUMN ... SET EXPRESSION
that changes the generation expression of a generated column.
The syntax is not standard but was adapted from other SQL
implementations.
This command causes a table rewrite, using the usual ALTER TABLE
mechanisms. The implementation is similar to and makes use of some of
the infrastructure of the SET DATA TYPE subcommand (for example,
rebuilding constraints and indexes afterwards). The new command
requires a new pass in AlterTablePass, and the ADD COLUMN pass had to
be moved earlier so that combinations of ADD COLUMN and SET EXPRESSION
can work.
Author: Amul Sul <sulamul@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/CAAJ_b94yyJeGA-5M951_Lr+KfZokOp-2kXicpmEhi5FXhBeTog@mail.gmail.com
1349d2790 added code to allow DISTINCT and ORDER BY aggregates to work
more efficiently by using presorted input. That commit added some code
that made use of the AggState's tmpcontext and adjusted the
ecxt_outertuple and ecxt_innertuple slots before checking if the current
row is distinct from the previously seen row. That code forgot to set the
TupleTableSlots back to what they were originally, which could result in
errors such as:
ERROR: attribute 1 of type record has wrong type
This only affects aggregate functions which have multiple arguments when
DISTINCT is used. For example: string_agg(DISTINCT col, ', ')
Thanks to Tom Lane for identifying the breaking commit.
Bug: #18264
Reported-by: Vojtěch Beneš
Discussion: https://postgr.es/m/18264-e363593d7e9feb7d@postgresql.org
Backpatch-through: 16, where 1349d2790 was added
This patch changes the existing 'conflicting' field to 'conflict_reason'
in pg_replication_slots. This new field indicates the reason for the
logical slot's conflict with recovery. It is always NULL for physical
slots, as well as for logical slots which are not invalidated. The
non-NULL values indicate that the slot is marked as invalidated. Possible
values are:
wal_removed = required WAL has been removed.
rows_removed = required rows have been removed.
wal_level_insufficient = the primary doesn't have a wal_level sufficient
to perform logical decoding.
The existing users of 'conflicting' column can get the same answer by
using 'conflict_reason' IS NOT NULL.
Author: Shveta Malik
Reviewed-by: Amit Kapila, Bertrand Drouvot, Michael Paquier
Discussion: https://postgr.es/m/ZYOE8IguqTbp-seF@paquier.xyz
CheckPWChallengeAuth() would return STATUS_ERROR if the user does not
exist or has no password assigned, even if the client disconnected
without responding to the password challenge (as libpq often will,
for example). We should return STATUS_EOF in that case, and the
lower-level functions do, but this code level got it wrong since the
refactoring done in 7ac955b34. This breaks the intent of not logging
anything for EOF cases (cf. comments in auth_failed()) and might
also confuse users of ClientAuthentication_hook.
Per report from Liu Lang. Back-patch to all supported versions.
Discussion: https://postgr.es/m/b725238c-539d-cb09-2bff-b5e6cb2c069c@esgyn.cn
Second attempt at 283a95da92. Since we can't reorder the enum values
of JsonPathItemType, instead reorder the switch cases where they are
used to generally follow the order of the enum values, for better
maintainability.
This reverts commit 283a95da92.
The reordering of JsonPathItemType affects the binary on-disk
compatibility of the jsonpath type, so we must not change it. Revert
for now and consider.
Swap the arguments to TimestampDifferenceMilliseconds so that we get
a positive answer instead of zero.
Then use the result of that computation instead of ignoring it.
Per reports from Alexander Lakhin.
Discussion: http://postgr.es/m/8b686764-7ac1-74c3-70f9-b64685a2535f@gmail.com
New TAP tests added by commits 9a17be1e and 4710b67d missed to convert
warnings to FATAL. This commit fixes that.
Author: Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>
Some of the TAP tests have been historically setting the environment
variable PGDATABASE to 'postgres', which is not needed because
PostgreSQL::Test::Cluster already sets it when initialized. This commit
removes these explicit setups.
Note that the dependency of cluster -a with PGDATABASE (from
1caef31d9e) is still documented.
Author: Bharath Rupireddy
Discussion: https://postgr.es/m/CALj2ACXLAz5dW3ZP+Fec8g6jQMMmDyCVT+qdbye2h7QJJmhsdw@mail.gmail.com
Avoid leaving a dangling pointer in the unlikely event that
nsphash_create fails. Improve comments, and fix formatting by
adding typedefs.list entries.
Discussion: https://postgr.es/m/3972900.1704145107@sss.pgh.pa.us
Amit Kapila