Some macOS machines are having trouble with 002_inline, which executes
the JSON parser test executables hundreds of times in a nested loop.
Both developer machines and buildfarm critters have shown excessive test
durations, upwards of 20 seconds.
Push the innermost loop of 002_inline, which iterates through differing
chunk sizes, down into the test executable. (I'd eventually like to push
all of the JSON unit tests down into C, but this is an easy win in the
short term.) Testers have reported a speedup between 4-9x.
Reported-by: Robert Haas <robertmhaas@gmail.com>
Suggested-by: Andres Freund <andres@anarazel.de>
Tested-by: Andrew Dunstan <andrew@dunslane.net>
Tested-by: Tom Lane <tgl@sss.pgh.pa.us>
Tested-by: Robert Haas <robertmhaas@gmail.com>
Discussion: https://postgr.es/m/CA%2BTgmobKoG%2BgKzH9qB7uE4MFo-z1hn7UngqAe9b0UqNbn3_XGQ%40mail.gmail.com
Backpatch-through: 17
pgbench uses readCommandResponse() to process server responses.
When readCommandResponse() encounters an error during a call to
PQgetResult() to fetch the current result, it attempts to report it
with an additional error message from PQerrorMessage(). However,
previously, this extra error message could be lost or become incorrect.
The cause was that after fetching the current result (and detecting
an error), readCommandResponse() called PQgetResult() again to
peek at the next result. This second call could overwrite the libpq
connection's error message before the original error was reported,
causing the error message retrieved from PQerrorMessage() to be
lost or overwritten.
This commit fixes the issue by updating readCommandResponse()
to use PQresultErrorMessage() instead of PQerrorMessage()
to retrieve the error message generated when the PQgetResult()
for the current result causes an error, ensuring the correct message
is reported.
Backpatch to all supported versions.
Author: Yugo Nagata <nagata@sraoss.co.jp>
Reviewed-by: Chao Li <lic@highgo.com>
Reviewed-by: Fujii Masao <masao.fujii@gmail.com>
Discussion: https://postgr.es/m/20250925110940.ebacc31725758ec47d5432c6@sraoss.co.jp
Backpatch-through: 13
Contrary to its siblings for the archiver, the bgwriter and the
checkpointer stats, pgstat_report_inj_fixed() can be called
concurrently. This was causing an assertion failure, while messing up
with the stats.
This code is aimed at being a template for extension developers, so it
is not a critical issue, but let's be correct. This module has also
been useful for some benchmarking, at least for me, and that was how I
have discovered this issue.
Oversight in f68cd847fa.
Author: Michael Paquier <michael@paquier.xyz>
Reviewed-by: Bertrand Drouvot <bertranddrouvot.pg@gmail.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Reviewed-by: wenhui qiu <qiuwenhuifx@gmail.com>
Discussion: https://postgr.es/m/aNnXbAXHPFUWPIz2@paquier.xyz
Backpatch-through: 18
Neighbor get_statistics_object_oid() ignores objects in pg_temp, as has
been the standard for non-relation, non-type namespace searches since
CVE-2007-2138. Hence, most operations that name a statistics object
correctly decline to map an unqualified name to a statistics object in
pg_temp. StatisticsObjIsVisibleExt() did not. Consequently,
pg_statistics_obj_is_visible() wrongly returned true for such objects,
psql \dX wrongly listed them, and getObjectDescription()-based ereport()
and pg_describe_object() wrongly omitted namespace qualification. Any
malfunction beyond that would depend on how a human or application acts
on those wrong indications. Commit
d99d58cdc8 introduced this. Back-patch to
v13 (all supported versions).
Reviewed-by: Nathan Bossart <nathandbossart@gmail.com>
Discussion: https://postgr.es/m/20250920162116.2e.nmisch@google.com
Backpatch-through: 13
Because we failed to do this, DISTINCT in GROUP BY DISTINCT would be
ignored in PL/pgSQL assignment statements. It's not surprising that
no one noticed, since such statements will throw an error if the query
produces more than one row. That eliminates most scenarios where
advanced forms of GROUP BY could be useful, and indeed makes it hard
even to find a simple test case. Nonetheless it's wrong.
This is directly the fault of be45be9c3 which added the groupDistinct
field, but I think much of the blame has to fall on c9d529848, in
which I incautiously supposed that we'd manage to keep two copies of
a big chunk of parse-analysis logic in sync. As a follow-up, I plan
to refactor so that there's only one copy. But that seems useful
only in master, so let's use this one-line fix for the back branches.
Author: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/31027.1758919078@sss.pgh.pa.us
Backpatch-through: 14
When running pgbench with --verbose-errors option and a custom script that
triggered retriable errors (e.g., serialization errors) in pipeline mode,
an assertion failure could occur:
Assertion failed: (sql_script[st->use_file].commands[st->command]->type == 1), function commandError, file pgbench.c, line 3062.
The failure happened because pgbench assumed these errors would only occur
during SQL commands, but in pipeline mode they can also happen during
\endpipeline meta command.
This commit fixes the assertion failure by adjusting the assertion check to
allow such errors during either SQL commands or \endpipeline.
Backpatch to v15, where the assertion check was introduced.
Author: Yugo Nagata <nagata@sraoss.co.jp>
Reviewed-by: Fujii Masao <masao.fujii@gmail.com>
Discussion: https://postgr.es/m/CAHGQGwGWQMOzNkQs-LmpDHdNC0h8dmAuUMRvZrEntQi5a-b=Kg@mail.gmail.com
The functions test_stat_func() and test_stat_func2() had empty
function bodies, so that they took very little time to run. This made
it possible that on machines with relatively low timer resolution the
functions could return before the clock advanced, making the test fail
(as seen on buildfarm members fruitcrow and hamerkop).
To avoid that, pg_sleep for 10us during the functions. As far as we
can tell, all current hardware has clock resolution much less than
that. (The current implementation of pg_sleep will round it up to
1ms anyway, but someday that might get improved.)
Author: Michael Banck <mbanck@gmx.net>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/68d413a3.a70a0220.24c74c.8be9@mx.google.com
Backpatch-through: 15
If we already have an extension_state array but see a new extension_id
much larger than the highest the extension_id we've previously seen,
the old code might have failed to expand the array to a large enough
size, leading to disaster. Also, if we don't have an extension array
at all and need to create one, we should make sure that it's big enough
that we don't have to resize it instantly.
Reported-by: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: http://postgr.es/m/2949591.1758570711@sss.pgh.pa.us
Backpatch-through: 18
When defining an injection point there is no need to wrap the definition
with USE_INJECTION_POINT guards, the INJECTION_POINT macro is available
in all builds. Remove to make the code consistent.
Author: Hayato Kuroda <kuroda.hayato@fujitsu.com>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Discussion: https://postgr.es/m/OSCPR01MB14966C8015DEB05ABEF2CE077F51FA@OSCPR01MB14966.jpnprd01.prod.outlook.com
Backpatch-through: 17
... which silently propagates a lot of headers into many places
via pgstat.h, as evidenced by the variety of headers that this patch
needs to add to seemingly random places. Add a minimum of typedefs to
conflict.h to be able to remove execnodes.h, and fix the fallout.
Backpatch to 18, where conflict.h first appeared.
Discussion: https://postgr.es/m/202509191927.uj2ijwmho7nv@alvherre.pgsql
Remove stray whitespace in xref tag.
This was found due to a regression in xmllint 2.15.0 which flagged
this as an error, and at the time of this commit no fix for xmllint
has shipped.
Author: Erik Wienhold <ewie@ewie.name>
Discussion: https://postgr.es/m/f4c4661b-4e60-4c10-9336-768b7b55c084@ewie.name
Backpatch-through: 17
Previously, the parallel apply worker used SIGINT to receive a graceful
shutdown signal from the leader apply worker. However, SIGINT is also used
by the LOCK_TIMEOUT handler to trigger a query-cancel interrupt. This
overlap caused the parallel apply worker to miss LOCK_TIMEOUT signals,
leading to incorrect behavior during lock wait/contention.
This patch resolves the conflict by switching the graceful shutdown signal
from SIGINT to SIGUSR2.
Reported-by: Zane Duffield <duffieldzane@gmail.com>
Diagnosed-by: Zhijie Hou <houzj.fnst@fujitsu.com>
Author: Hayato Kuroda <kuroda.hayato@fujitsu.com>
Reviewed-by: Amit Kapila <amit.kapila16@gmail.com>
Backpatch-through: 16, where it was introduced
Discussion: https://postgr.es/m/CACMiCkXyC4au74kvE2g6Y=mCEF8X6r-Ne_ty4r7qWkUjRE4+oQ@mail.gmail.com
The package for the UUID library may be named "uuid" or "ossp-uuid", and
meson.build has been using a single call of dependency() with multiple
names, something only supported since meson 0.60.0.
The minimum version of meson supported by Postgres is 0.57.2 on HEAD,
since f039c22441, and 0.54 on stable branches down to 16.
Author: Oreo Yang <oreo.yang@hotmail.com>
Reviewed-by: Nazir Bilal Yavuz <byavuz81@gmail.com>
Discussion: https://postgr.es/m/OS3P301MB01656E6F91539770682B1E77E711A@OS3P301MB0165.JPNP301.PROD.OUTLOOK.COM
Backpatch-through: 16
Remove stray whitespace in xref tag.
This was found due to a regression in xmllint 2.15.0 which flagged
this as an error, and at the time of this commit no fix for xmllint
has shipped.
Author: Erik Wienhold <ewie@ewie.name>
Discussion: https://postgr.es/m/f4c4661b-4e60-4c10-9336-768b7b55c084@ewie.name
Backpatch-through: 17
This reverts commit 5f565b0aee temporarily on v18. This branch is in
a release freeze state until tagged. Let's re-add this commit once the
release is out. The other branches are left untouched.
Discussion: https://postgr.es/m/2775358.1758498584@sss.pgh.pa.us
The package for the UUID library may be named "uuid" or "ossp-uuid", and
meson.build has been using a single call of dependency() with multiple
names, something only supported since meson 0.60.0.
The minimum version of meson supported by Postgres is 0.57.2 on HEAD,
since f039c22441, and 0.54 on stable branches down to 16.
Author: Oreo Yang <oreo.yang@hotmail.com>
Reviewed-by: Nazir Bilal Yavuz <byavuz81@gmail.com>
Discussion: https://postgr.es/m/OS3P301MB01656E6F91539770682B1E77E711A@OS3P301MB0165.JPNP301.PROD.OUTLOOK.COM
Backpatch-through: 16
Initially this was to fix the "catched" typo, but I (David) wasn't quite
clear on what the previous comment meant about being "effective". I
expect this means efficiency, so I've reworded the comment to indicate
that.
While this is only a comment fixup, for the sake of possibly minimizing
possible future backpatching pain, I've opted to backpatch to 18 since
this code is new to that version and the release isn't out the door yet.
Author: Tender Wang <tndrwang@gmail.com>
Discussion: https://postgr.es/m/CAHewXNmSYWPud1sfBvpKbCJeRkWeZYuqatxtV9U9LvAFXBEiBw@mail.gmail.com
Backpatch-through: 18
Commit bb3ec16e14 moved partition pruning metadata into PlannedStmt.
At executor startup this metadata is used to initialize the EState
fields es_part_prune_infos, es_part_prune_states, and
es_part_prune_results. EvalPlanQualStart() failed to copy those
fields into the child EState, causing NULL dereference when Append
ran partition pruning during a recheck. This can occur with DELETE
or UPDATE on partitioned tables that use runtime pruning, e.g. with
generic plans.
Fix by copying all partition pruning state into the EPQ estate.
Add an isolation test that reproduces the crash with concurrent
UPDATE and DELETE on a partitioned table, where the DELETE session
hits the crash during its EPQ recheck after the UPDATE commits.
Bug: #19056
Reported-by: Fei Changhong <feichanghong@qq.com>
Diagnozed-by: Fei Changhong <feichanghong@qq.com>
Author: David Rowley <dgrowleyml@gmail.com>
Co-authored-by: Amit Langote <amitlangote09@gmail.com>
Discussion: https://postgr.es/m/19056-a677cef9b54d76a0%40postgresql.org
Previously, pg_restore did not skip security labels on publications or
subscriptions even when --no-publications or --no-subscriptions was specified.
As a result, it could issue SECURITY LABEL commands for objects that were
never created, causing those commands to fail.
This commit fixes the issue by ensuring that security labels on publications
and subscriptions are also skipped when the corresponding options are used.
Backpatch to all supported versions.
Author: Jian He <jian.universality@gmail.com>
Reviewed-by: Fujii Masao <masao.fujii@gmail.com>
Discussion: https://postgr.es/m/CACJufxHCt00pR9h51AVu6+yPD5J7JQn=7dQXxqacj0XyDhc-fA@mail.gmail.com
Backpatch-through: 13
If an aggregate function call contains a sub-select that has
an RTE referencing a CTE outside the aggregate, we must treat
that reference like a Var referencing the CTE's query level
for purposes of determining the aggregate's level. Otherwise
we might reach the nonsensical conclusion that the aggregate
should be evaluated at some query level higher than the CTE,
ending in a planner error or a broken plan tree that causes
executor failures.
Bug: #19055
Reported-by: BugForge <dllggyx@outlook.com>
Author: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/19055-6970cfa8556a394d@postgresql.org
Backpatch-through: 13
The pending entry was not used when incrementing its data, directly
manipulating the shared memory pointer, without even locking it. This
could mean losing statistics under concurrent activity. The flush
callback was a no-op.
This code serves as a base template for extensions for the custom
cumulative statistics, so let's be clean and use a pending entry for the
incrementations, whose data is then flushed to the corresponding entry
in the shared hashtable when all the stats are reported, in its own
flush callback.
Author: Sami Imseih <samimseih@gmail.com>
Discussion: https://postgr.es/m/CAA5RZ0v0U0yhPbY+bqChomkPbyUrRQ3rQXnZf_SB-svDiQOpgQ@mail.gmail.com
Backpatch-through: 18
The shared memory size was calculated based on an offset of io_handles,
which is itself a pointer included in the structure. We tend to
overestimate the shared memory size overall, so this was unlikely an
issue in practice, but let's be correct and use the full size of the
structure in the calculation, so as the pointer for io_handles is
included.
Oversight in da7226993f.
Author: Madhukar Prasad <madhukarprasad@google.com>
Reviewed-by: Andres Freund <andres@anarazel.de>
Reviewed-by: Matthias van de Meent <boekewurm+postgres@gmail.com>
Discussion: https://postgr.es/m/CAKi+wrbC2dTzh_vKJoAZXV5wqTbhY0n4wRNpCjJ=e36aoo0kFw@mail.gmail.com
Backpatch-through: 18
The EvalPlanQual recheck for TID Range Scan wasn't rechecking the TID qual
still passed after following update chains. This could result in tuples
being updated or deleted by plans using TID Range Scans where the ctid of
the new (updated) tuple no longer matches the clause of the scan. This
isn't desired behavior, and isn't consistent with what would happen if the
chosen plan had used an Index or Seq Scan, and that could lead to hard to
predict behavior for scans that contain TID quals and other quals as the
planner has freedom to choose TID Range or some other non-TID scan method
for such queries, and the chosen plan could change at any moment.
Here we fix this by properly implementing the recheck function for TID
Range Scans.
Backpatch to 14, where TID Range Scans were added
Reported-by: Sophie Alpert <pg@sophiebits.com>
Author: Sophie Alpert <pg@sophiebits.com>
Author: David Rowley <dgrowleyml@gmail.com>
Reviewed-by: David Rowley <dgrowleyml@gmail.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Discussion: https://postgr.es/m/4a6268ff-3340-453a-9bf5-c98d51a6f729@app.fastmail.com
Backpatch-through: 14
The EvalPlanQual recheck for TID Scan wasn't rechecking the TID qual
still passed after following update chains. This could result in tuples
being updated or deleted by plans using TID Scans where the ctid of the
new (updated) tuple no longer matches the clause of the scan. This isn't
desired behavior, and isn't consistent with what would happen if the
chosen plan had used an Index or Seq Scan, and that could lead to hard to
predict behavior for scans that contain TID quals and other quals as the
planner has freedom to choose TID or some other scan method for such
queries, and the chosen plan could change at any moment.
Here we fix this by properly implementing the recheck function for TID
Scans.
Backpatch to 13, oldest supported version
Reported-by: Sophie Alpert <pg@sophiebits.com>
Author: Sophie Alpert <pg@sophiebits.com>
Author: David Rowley <dgrowleyml@gmail.com>
Reviewed-by: David Rowley <dgrowleyml@gmail.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Discussion: https://postgr.es/m/4a6268ff-3340-453a-9bf5-c98d51a6f729@app.fastmail.com
Backpatch-through: 13
This reverts commit 98fc31d649.
That change allowed DROP OWNED BY to drop grants of the target
role to other roles, arguing that nobody would need those
privileges anymore. But that's not so: if you're not superuser,
you still need admin privilege on the target role so you can
drop it.
It's not clear whether or how the dependency-based approach
to solving the original problem can be adapted to keep these
grants. Since v18 release is fast approaching, the sanest
thing to do seems to be to revert this patch for now. The
race-condition problem is low severity and not worth taking
risks for.
I didn't force a catversion bump in 98fc31d64, so I won't do
so here either.
Reported-by: Dipesh Dhameliya <dipeshdhameliya125@gmail.com>
Author: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/CABgZEgczOFicCJoqtrH9gbYMe_BV3Hq8zzCBRcMgmU6LRsihUA@mail.gmail.com
Backpatch-through: 18
The COMMENT should depend on the separately-dumped constraint, not the
domain. Sufficient restore parallelism might fail the COMMENT command
by issuing it before the constraint exists. Back-patch to v13, like
commit 0858f0f96e.
Reviewed-by: Álvaro Herrera <alvherre@kurilemu.de>
Discussion: https://postgr.es/m/20250913020233.fa.nmisch@google.com
Backpatch-through: 13
In our previous discussions around making our regression tests
pass in FIPS mode, we concluded that we didn't need to support
the different error message wording observed with pre-3.0 OpenSSL.
However there are still a few LTS distributions soldiering along
with such versions, and now we have some in the buildfarm.
So let's add the variant expected-files needed to make them happy.
This commit only covers the core regression tests. Previous
discussion suggested that we might need some adjustments in
contrib as well, but it's not totally clear to me what those
would be. Rather than work it out from first principles,
I'll wait to see what the buildfarm shows.
Back-patch to v17 which is the oldest branch that claims
to support this case.
Author: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/443709.1757876535@sss.pgh.pa.us
Backpatch-through: 17
JsonConstructorExpr can produce non-NULL output with a NULL input, so
it should be treated as a non-strict construct. Failing to do so can
lead to incorrect query behavior.
For example, in the reported case, when pulling up a subquery that is
under an outer join, if the subquery's target list contains a
JsonConstructorExpr that uses subquery variables and it is mistakenly
treated as strict, it will be pulled up without being wrapped in a
PlaceHolderVar. As a result, the expression will be evaluated at the
wrong place and will not be forced to null when the outer join should
do so.
Back-patch to v16 where JsonConstructorExpr was introduced.
Bug: #19046
Reported-by: Runyuan He <runyuan@berkeley.edu>
Author: Tender Wang <tndrwang@gmail.com>
Co-authored-by: Richard Guo <guofenglinux@gmail.com>
Discussion: https://postgr.es/m/19046-765b6602b0a8cfdf@postgresql.org
Backpatch-through: 16
Fix for commit 3c86223c99. That commit moved the typedef of pg_int64
from postgres_ext.h to libpq-fe.h, because the only remaining place
where it might be used is libpq users, and since the type is obsolete,
the intent was to limit its scope.
The problem is that if someone builds an extension against an
older (pre-PG18) server version and a new (PG18) libpq, they might get
two typedefs, depending on include file order. This is not allowed
under C99, so they might get warnings or errors, depending on the
compiler and options. The underlying types might also be
different (e.g., long int vs. long long int), which would also lead to
errors. This scenario is plausible when using the standard Debian
packaging, which provides only the newest libpq but per-major-version
server packages.
The fix is to undo that part of commit 3c86223c99. That way, the
typedef is in the same header file across versions. At least, this is
the safest fix doable before PostgreSQL 18 releases.
Reviewed-by: Thomas Munro <thomas.munro@gmail.com>
Discussion: https://www.postgresql.org/message-id/25144219-5142-4589-89f8-4e76948b32db%40eisentraut.org
Previously, pg_dump incorrectly queried pg_seclabel to retrieve security labels
for subscriptions, which are stored in pg_shseclabel as they are global objects.
This could result in security labels for subscriptions not being dumped.
This commit fixes the issue by updating pg_dump to query the pg_seclabels view,
which aggregates entries from both pg_seclabel and pg_shseclabel.
While querying pg_shseclabel directly for subscriptions was an alternative,
using pg_seclabels is simpler and sufficient.
In addition, pg_dump is updated to dump security labels on event triggers,
which were previously omitted.
Backpatch to all supported versions.
Author: Jian He <jian.universality@gmail.com>
Co-authored-by: Fujii Masao <masao.fujii@gmail.com>
Discussion: https://postgr.es/m/CACJufxHCt00pR9h51AVu6+yPD5J7JQn=7dQXxqacj0XyDhc-fA@mail.gmail.com
Backpatch-through: 13
Commit 7202d72787 added in passing some const qualifiers, but the one
on the postmaster_child_launch() startup_data argument was incorrect,
because the function itself modifies the pointed-to data. This is
hidden from the compiler because of casts. The qualifiers on the
functions called by postmaster_child_launch() are still correct.
Previously, pg_restore did not skip comments on policies even when
--no-policies was specified. As a result, it could issue COMMENT commands
for policies that were never created, causing those commands to fail.
This commit fixes the issue by ensuring that comments on policies
are also skipped when --no-policies is used.
Backpatch to v18, where --no-policies was added in pg_restore.
Author: Jian He <jian.universality@gmail.com>
Co-authored-by: Fujii Masao <masao.fujii@gmail.com>
Discussion: https://postgr.es/m/CACJufxHCt00pR9h51AVu6+yPD5J7JQn=7dQXxqacj0XyDhc-fA@mail.gmail.com
Backpatch-through: 18
Previously, pg_restore did not skip comments on publications or subscriptions
even when --no-publications or --no-subscriptions was specified. As a result,
it could issue COMMENT commands for objects that were never created,
causing those commands to fail.
This commit fixes the issue by ensuring that comments on publications and
subscriptions are also skipped when the corresponding options are used.
Backpatch to all supported versions.
Author: Jian He <jian.universality@gmail.com>
Co-authored-by: Fujii Masao <masao.fujii@gmail.com>
Discussion: https://postgr.es/m/CACJufxHCt00pR9h51AVu6+yPD5J7JQn=7dQXxqacj0XyDhc-fA@mail.gmail.com
Backpatch-through: 13
If extensions of equal names were installed in different directories
in the path, the views pg_available_extensions and
pg_available_extension_versions would show all of them, even though
only the first one was actually reachable by CREATE EXTENSION. To
fix, have those views skip extensions found later in the path if they
have names already found earlier.
Also add a bit of documentation that only the first extension in the
path can be used.
Reported-by: Pierrick <pierrick.chovelon@dalibo.com>
Discussion: https://www.postgresql.org/message-id/flat/8f5a0517-1cb8-4085-ae89-77e7454e27ba%40dalibo.com
The TimescaleDB extension expects to be able to change an nbtree scan's
keys across rescans. The issue arises in the extension's implementation
of loose index scan. This is arguably a misuse of the index AM API,
though apparently it worked until recently. It stopped working when the
skipScan flag was added to BTScanOpaqueData by commit 8a510275, though.
The flag wouldn't reliably track whether the scan (actually, the current
rescan) has any skip arrays, leading to confusion in _bt_set_startikey.
nbtree preprocessing will now defensively initialize the scan's skipScan
flag in all cases, including the case where _bt_preprocess_array_keys
returns early due to the (re)scan not using arrays. While nbtree isn't
obligated to support this use case (at least not according to my reading
of the index AM API), it still seems like a good idea to be consistent
here, on general robustness grounds.
Author: Peter Geoghegan <pg@bowt.ie>
Reported-By: Natalya Aksman <natalya@timescale.com>
Discussion: https://postgr.es/m/CAJumhcirfMojbk20+W0YimbNDkwdECvJprQGQ-XqK--ph09nQw@mail.gmail.com
Backpatch-through: 18
Commit e3ffc3e91 fixed the translation of character classes in
SIMILAR TO regular expressions. Unfortunately the fix broke a corner
case: if there is an escape character right after the opening bracket
(for example in "[\q]"), a closing bracket right after the escape
sequence would not be seen as closing the character class.
There were two more oversights: a backslash or a nested opening bracket
right at the beginning of a character class should remove the special
meaning from any following caret or closing bracket.
This bug suggests that this code needs to be more readable, so also
rename the variables "charclass_depth" and "charclass_start" to
something more meaningful, rewrite an "if" cascade to be more
consistent, and improve the commentary.
Reported-by: Dominique Devienne <ddevienne@gmail.com>
Reported-by: Stephan Springl <springl-psql@bfw-online.de>
Author: Laurenz Albe <laurenz.albe@cybertec.at>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/CAFCRh-8NwJd0jq6P=R3qhHyqU7hw0BTor3W0SvUcii24et+zAw@mail.gmail.com
Backpatch-through: 13
Jacob Champion