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5983a4cff added CompactAttribute for storing commonly used fields from
FormData_pg_attribute. 5983a4cff didn't go to the trouble of adjusting
every location where we can use CompactAttribute rather than
FormData_pg_attribute, so here we change the remaining ones.
There are some locations where I've left the code using
FormData_pg_attribute. These are mostly in the ALTER TABLE code. Using
CompactAttribute here seems more risky as often the TupleDesc is being
changed and those changes may not have been flushed to the
CompactAttribute yet.
I've also left record_recv(), record_send(), record_cmp(), record_eq()
and record_image_eq() alone as it's not clear to me that accessing the
CompactAttribute is a win here due to the FormData_pg_attribute still
having to be accessed for most cases. Switching the relevant parts to
use CompactAttribute would result in having to access both for common
cases. Careful benchmarking may reveal that something can be done to
make this better, but in absence of that, the safer option is to leave
these alone.
In ReorderBufferToastReplace(), there was a check to skip attnums < 0
while looping over the TupleDesc. Doing this is redundant since
TupleDescs don't store < 0 attnums. Removing that code allows us to
move to using CompactAttribute.
The change in validateDomainCheckConstraint() just moves fetching the
FormData_pg_attribute into the ERROR path, which is cold due to calling
errstart_cold() and results in code being moved out of the common path.
Author: David Rowley <dgrowleyml@gmail.com>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://postgr.es/m/CAApHDvrMy90o1Lgkt31F82tcSuwRFHq3vyGewSRN=-QuSEEvyQ@mail.gmail.com
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If a data block to be skipped over is less than 4kB, just read the
data instead of using fseeko(). Experimentation shows that this
avoids useless kernel calls --- possibly quite a lot of them, at
least with current glibc --- while not incurring any extra I/O,
since libc will read 4kB at a time anyway. (There may be platforms
where the default buffer size is different from 4kB, but this
change seems unlikely to hurt in any case.)
We don't expect short data blocks to be common in the wake of
66ec01dc4 and related commits. But older pg_dump files may well
contain very short data blocks, and that will likely be a case
to be concerned with for a long time.
While here, do a little bit of other cleanup in _skipData.
Make "buflen" be size_t not int; it can't really exceed the
range of int, but comparing size_t and int variables is just
asking for trouble. Also, when we initially allocate a buffer
for reading skipped data into, make sure it's at least 4kB to
reduce the odds that we'll shortly have to realloc it bigger.
Author: Dimitrios Apostolou <jimis@gmx.net>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/2edb7a57-b225-3b23-a680-62ba90658fec@gmx.net
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This commit adds a note to RELEASE_CHANGES to remind us to create
an .abi-compliance-history file for new major versions.
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: David E. Wheeler <david@justatheory.com>
Discussion: https://postgr.es/m/aPJ03E2itovDBcKX%40nathan
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Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Discussion: https://postgr.es/m/0151ad01239e2cc7b3139644358cf8f7b9622ff7.camel@j-davis.com
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Now that tsearch uses the database default locale, there's no need to
track the database CTYPE separately.
Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Discussion: https://postgr.es/m/0151ad01239e2cc7b3139644358cf8f7b9622ff7.camel@j-davis.com
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Previously, tsearch used the database's CTYPE setting, which only
matches the database default collation if the locale provider is libc.
Note that tsearch types (tsvector and tsquery) are not collatable
types. The locale affects parsing the original text, which is a lossy
process, so a COLLATE clause on the already-parsed value would not
make sense.
Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Discussion: https://postgr.es/m/0151ad01239e2cc7b3139644358cf8f7b9622ff7.camel@j-davis.com
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Backpatch-through: 13
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Currently there's no bug, because we have no code path where we
invalidate relcache entries where it'd cause a problem. But it's more
robust to do it this way in case we introduce such a path later, as some
Postgres forks reportedly already have.
Author: Daniil Davydov <3danissimo@gmail.com>
Reviewed-by: Stepan Neretin <slpmcf@gmail.com>
Discussion: https://postgr.es/m/CAJDiXgj3FNzAhV+jjPqxMs3jz=OgPohsoXFj_fh-L+nS+13CKQ@mail.gmail.com
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A BlockNumber (32-bit) might not be large enough to add bo_pagesPerRange
to when the table contains close to 2^32 pages. At worst, this could
result in a cancellable infinite loop during the BRIN index scan with
power-of-2 pagesPerRange, and slow (inefficient) BRIN index scans and
scanning of unneeded heap blocks for non power-of-2 pagesPerRange.
Backpatch to all supported versions.
Author: sunil s <sunilfeb26@gmail.com>
Reviewed-by: David Rowley <dgrowleyml@gmail.com>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://postgr.es/m/CAOG6S4-tGksTQhVzJM19NzLYAHusXsK2HmADPZzGQcfZABsvpA@mail.gmail.com
Backpatch-through: 13
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The comment fixed in this commit described the function as dealing with
database blocks, but in reality it processes shared memory allocations.
Author: Bertrand Drouvot <bertranddrouvot.pg@gmail.com>
Discussion: https://postgr.es/m/aH4DDhdiG9Gi0rG7@ip-10-97-1-34.eu-west-3.compute.internal
Backpatch-through: 18
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67a54b9e8 taught the planner to push down HAVING clauses even when
grouping sets are present, as long as the clause does not reference
any columns that are nullable by the grouping sets. However, there
was an oversight: if any empty grouping sets are present, the
aggregation node can produce a row that did not come from the input,
and pushing down a HAVING clause in this case may cause us to fail to
filter out that row.
Currently, non-degenerate HAVING clauses are not pushed down when
empty grouping sets are present, since the empty grouping sets would
nullify the vars they reference. However, degenerate (variable-free)
HAVING clauses are not subject to this restriction and may be
incorrectly pushed down.
To fix, explicitly check for the presence of empty grouping sets and
retain degenerate clauses in HAVING when they are present. This
ensures that we don't emit a bogus aggregated row. A copy of each
such clause is also put in WHERE so that query_planner() can use it in
a gating Result node.
To facilitate this check, this patch expands the groupingSets tree of
the query to a flat list of grouping sets before applying the HAVING
pushdown optimization. This does not add any additional planning
overhead, since we need to do this expansion anyway.
In passing, make a small tweak to preprocess_grouping_sets() by
reordering its initial operations a bit.
Backpatch to v18, where this issue was introduced.
Reported-by: Yuhang Qiu <iamqyh@gmail.com>
Author: Richard Guo <guofenglinux@gmail.com>
Author: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/0879D9C9-7FE2-4A20-9593-B23F7A0B5290@gmail.com
Backpatch-through: 18
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pgwin32_unsetenv() (compatibility routine of unsetenv() on Windows)
lacks the input validation that its sibling pgwin32_setenv() has.
Without these checks, calling unsetenv() with incorrect names crashes on
WIN32. However, invalid names should be handled, failing on EINVAL.
This commit adds the same checks as setenv() to fail with EINVAL for a
"name" set to NULL, an empty string, or if '=' is included in the value,
per POSIX requirements.
Like 7ca37fb0406b, backpatch down to v14. pgwin32_unsetenv() is defined
on REL_13_STABLE, but with the branch going EOL soon and the lack of
setenv() there for WIN32, nothing is done for v13.
Author: Bryan Green <dbryan.green@gmail.com>
Discussion: https://postgr.es/m/b6a1e52b-d808-4df7-87f7-2ff48d15003e@gmail.com
Backpatch-through: 14
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Previously, COPY TO command didn't support directly specifying
partitioned tables so users had to use COPY (SELECT ...) TO variant.
This commit adds direct COPY TO support for partitioned
tables, improving both usability and performance. Performance tests
show it's faster than the COPY (SELECT ...) TO variant as it avoids
the overheads of query processing and sending results to the COPY TO
command.
When used with partitioned tables, COPY TO copies the same rows as
SELECT * FROM table. Row-level security policies of the partitioned
table are applied in the same way as when executing COPY TO on a plain
table.
Author: jian he <jian.universality@gmail.com>
Reviewed-by: vignesh C <vignesh21@gmail.com>
Reviewed-by: David Rowley <dgrowleyml@gmail.com>
Reviewed-by: Melih Mutlu <m.melihmutlu@gmail.com>
Reviewed-by: Kirill Reshke <reshkekirill@gmail.com>
Reviewed-by: Atsushi Torikoshi <torikoshia@oss.nttdata.com>
Reviewed-by: Álvaro Herrera <alvherre@kurilemu.de>
Reviewed-by: Masahiko Sawada <sawada.mshk@gmail.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Discussion: https://postgr.es/m/CACJufxEZt%2BG19Ors3bQUq-42-61__C%3Dy5k2wk%3DsHEFRusu7%3DiQ%40mail.gmail.com
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The revised logic in 001_ssltests.pl would fail if openssl
doesn't work or if Perl is a 32-bit build, because it had
already overwritten $serialno with something inappropriate
to use in the eventual match. We could go back to the
previous code layout, but it seems best to introduce a
separate variable for the output of openssl.
Per failure on buildfarm member mamba, which has a 32-bit Perl.
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Commit d9572c4e3b4 added extension support and made pg_dump attempt to
dump security labels on extensions. However, security labels on extensions
are not actually supported, so this code was unnecessary.
This commit removes it.
Suggested-by: Jian He <jian.universality@gmail.com>
Author: Fujii Masao <masao.fujii@gmail.com>
Reviewed-by: Jian He <jian.universality@gmail.com>
Discussion: https://postgr.es/m/CACJufxF8=z0v=888NKKEoTHQ+Jc4EXutFi91BF0fFjgFsZT6JQ@mail.gmail.com
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Previously, attempting to use pg_checksums on a cluster with a control
file whose version does not match with what thetool is able to support
would lead to the following error:
pg_checksums: error: pg_control CRC value is incorrect
This is confusing, because it would look like the control file is
corrupted. However, the contents of the control file are correct,
pg_checksums not being able to understand how the past control file is
shaped.
This commit adds a check based on PG_VERSION, using the facility added
by cd0be131ba6f, using the same error message as some of the other
frontend tools. A note is added in the documentation about the major
version requirement.
Author: Michael Banck <mbanck@gmx.net>
Discussion: https://postgr.es/m/68f1ff21.170a0220.2c9b5f.4df5@mx.google.com
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Our configure script intended to ensure this, but it supposed that
expr(1) would report an error for integer overflow. Maybe that
was true when the code was written (commit 3c6248a82 of 2008-05-02),
but all the modern expr's I tried will deliver bigger-than-int32
results without complaint. Moreover, if you use --with-segsize-blocks
then there's no check at all.
Ideally we'd add a test in configure itself to check that the value
fits in int, but to do that we'd need to suppose that test(1) handles
bigger-than-int32 numbers correctly. Probably modern ones do, but
that's an assumption I could do without; and I'm not too trusting
about meson either. Instead, let's install a static assertion, so
that even people who ignore all the compiler warnings you get from
such values will be forced to confront the fact that it won't work.
This has been hazardous for awhile, but given that we hadn't heard
a complaint about it till now, I don't feel a need to back-patch.
Reported-by: Casey Shobe <casey.allen.shobe@icloud.com>
Author: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/C5DC82D6-C76D-4E8F-BC2E-DF03EFC4FA24@icloud.com
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It emerges that zlib's configuration logic is not robust enough
to guarantee that the macro will have the same ideas about struct
field layout as the library itself does, leading to corruption of
zlib's state struct followed by unintelligible failure messages.
This hazard has existed for a long time, but we'd not noticed
for several reasons:
(1) We only use gzgetc() when trying to read a manually-compressed
TOC file within a directory-format dump, which is a rarely-used
scenario that we weren't even testing before 20ec99589.
(2) No corruption actually occurs unless sizeof(long) is different
from sizeof(off_t) and the platform is big-endian.
(3) Some platforms have already fixed the configuration instability,
at least sufficiently for their environments.
Despite (3), it seems foolish to assume that the problem isn't
going to be present in some environments for a long time to come.
Hence, avoid relying on this macro. We can just #undef it and
fall back on the underlying function of the same name.
Author: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/2122679.1760846783@sss.pgh.pa.us
Backpatch-through: 13
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Coverity complains that the return value from gettuple_eval_partition
(stored in variable "datum") in a do..while loop in
WinGetFuncArgInPartition is overwritten when exiting the while
loop. This commit tries to fix the issue by changing the
gettuple_eval_partition call to:
(void) gettuple_eval_partition()
explicitly stating that we discard the return value. We are just
interested in whether we are inside or outside of partition, NULL or
NOT NULL here.
Also enhance some comments for easier code reading.
Reported-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://postgr.es/m/aPCOabSE4VfJLaky%40paquier.xyz
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Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Discussion: https://postgr.es/m/0151ad01239e2cc7b3139644358cf8f7b9622ff7.camel@j-davis.com
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Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Discussion: https://postgr.es/m/0151ad01239e2cc7b3139644358cf8f7b9622ff7.camel@j-davis.com
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This removes a few static functions and replaces them with 2 functions
which aim to be more reusable. The upper planner's pathkey requirements
can be simplified down to operations which require pathkeys in the same
order as the pathkeys for the given operation, and operations which can
make use of a Path's pathkeys in any order.
Here we also add some short-circuiting to truncate_useless_pathkeys(). At
any point we discover that all pathkeys are useful to a single operation,
we can stop checking the remaining operations as we're not going to be
able to find any further useful pathkeys - they're all possibly useful
already. Adjusting this seems to warrant trying to put the checks
roughly in order of least-expensive-first so that the short-circuits
have the most chance of skipping the more expensive checks.
In passing clean up has_useful_pathkeys() as it seems to have grown a
redundant check for group_pathkeys. This isn't needed as
standard_qp_callback will set query_pathkeys if there's any requirement
to have group_pathkeys. All this code does is waste run-time effort and
take up needless space.
Author: David Rowley <dgrowleyml@gmail.com>
Reviewed-by: Richard Guo <guofenglinux@gmail.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Discussion: https://postgr.es/m/CAApHDvpbsEoTksvW5901MMoZo-hHf78E5up3uDOfkJnxDe_WAw@mail.gmail.com
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It is possible to have a non-inherited not-null constraint on an
inherited column, but we were failing to preserve such constraints
during pg_upgrade where the source is 17 or older, because of a bug in
the pg_dump query for it. Oversight in commit 14e87ffa5c54. Fix that
query. In passing, touch-up a bogus nearby comment introduced by the
same commit.
In version 17, make the regression tests leave a table in this
situation, so that this scenario is tested in the cross-version upgrade
tests of 18 and up.
Author: Dilip Kumar <dilipbalaut@gmail.com>
Reported-by: Andrew Bille <andrewbille@gmail.com>
Bug: #19074
Backpatch-through: 18
Discussion: https://postgr.es/m/19074-ae2548458cf0195c@postgresql.org
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Apparently, commit 04bc2c42f765 failed to notice that DO_FK_CONSTRAINT
objects require identical handling as DO_CONSTRAINT ones, which causes
some pg_upgrade tests in debug builds to fail spuriously. Add that.
Author: Álvaro Herrera <alvherre@kurilemu.de>
Backpatch-through: 13
Discussion: https://postgr.es/m/202510181201.k6y75v2tpf5r@alvherre.pgsql
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This fixes an unlikely issue when fetching GROUPING SET results from
their internally stored hash tables. It was possible in rare cases that
the hash iterator would be set up incorrectly which could result in a
crash.
This was introduced in 4d143509c, so backpatch to v18.
Many thanks to Yuri Zamyatin for reporting and helping to debug this
issue.
Bug: #19078
Reported-by: Yuri Zamyatin <yuri@yrz.am>
Author: David Rowley <dgrowleyml@gmail.com>
Reviewed-by: Jeff Davis <pgsql@j-davis.com>
Discussion: https://postgr.es/m/19078-dfd62f840a2c0766@postgresql.org
Backpatch-through: 18
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Switch to using the English word here rather than using a verbified
function name.
The full word still fits within a single comment line, so it's probably
better just to use that instead of trying to shorten it, which might
cause confusion.
Author: Rafia Sabih <rafia.pghackers@gmail.com>
Discussion: https://postgr.es/m/CA+FpmFe7LnRF2NA_QfARjkSWme4mNt+Udwbh2Yb=zZm35Ji31w@mail.gmail.com
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Commit a1b4f289beec improved the hashjoin sizing to also consider the
memory used by BufFiles for batches. The code however had multiple
issues, making it ineffective or not working as expected in some cases.
* The amount of memory needed by buffers was calculated using uint32,
so it would overflow for nbatch >= 262144. If this happened the loop
would exit prematurely and the memory usage would not be reduced.
The nbatch overflow is fixed by reworking the condition to not use a
multiplication at all, so there's no risk of overflow. An explicit
cast was added to a similar calculation in ExecHashIncreaseBatchSize.
* The loop adjusting the nbatch value used hash_table_bytes to calculate
the old/new size, but then updated only space_allowed. The consequence
is the total memory usage was not reduced, but all the memory saved by
reducing the number of batches was used for the internal hash table.
This was fixed by using only space_allowed. This is also more correct,
because hash_table_bytes does not account for skew buckets.
* The code was also doubling multiple parameters (e.g. the number of
buckets for hash table), but was missing overflow protections.
The loop now checks for overflow, and terminates if needed. It'd be
possible to cap the value and continue the loop, but it's not worth
the complexity. And the overflow implies the in-memory hash table is
already very large anyway.
While at it, rework the comment explaining how the memory balancing
works, to make it more concise and easier to understand.
The initial nbatch overflow issue was reported by Vaibhav Jain. The
other issues were noticed by me and Melanie Plageman. Fix by me, with a
lot of review and feedback by Melanie.
Backpatch to 18, where the hashjoin memory balancing was introduced.
Reported-by: Vaibhav Jain <jainva@google.com>
Reviewed-by: Melanie Plageman <melanieplageman@gmail.com>
Backpatch-through: 18
Discussion: https://postgr.es/m/CABa-Az174YvfFq7rLS+VNKaQyg7inA2exvPWmPWqnEn6Ditr_Q@mail.gmail.com
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Author: Mikhail Gribkov <youzhick@gmail.com>
Reviewed-by: Nazir Bilal Yavuz <byavuz81@gmail.com>
Discussion: https://postgr.es/m/CAMEv5_sxuaiAfSy1ZyN%3D7UGbHg3C10cwHhEk8nXEjiCsBVs4vQ%40mail.gmail.com
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Transpose the changes made by commit fabb33b35 in 002_pg_dump.pl
into its recently-created clone 006_pg_dump_compress.pl.
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The SSL tests for pg_stat_ssl tries to exactly match the serial
from the certificate by extracting it with the openssl binary.
If that fails due to the binary not being available, a fallback
match is used, but the attempt to execute a missing binary adds
a warning to the output which can confuse readers for a failure
in the test. Fix by only attempting if the openssl binary was
found by autoconf/meson.
Backpatch down to v16 where commit c8e4030d1bdd made the test
use the OPENSSL variable from autoconf/meson instead of a hard-
coded value.
Author: Daniel Gustafsson <daniel@yesql.se>
Reported-by: Christoph Berg <myon@debian.org>
Discussion: https://postgr.es/m/aNPSp1-RIAs3skZm@msg.df7cb.de
Backpatch-through: 16
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Previously, this was initialized at run time so that it did not have
to be maintained by hand in guc_tables.c. But since that table is now
generated anyway, we might as well generate this bit as well.
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/8fdfb91e-60fb-44fa-8df6-f5dea47353c9@eisentraut.org
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This makes the generating script simpler and the output easier to
read. In the future, it will make it easier to reorder and rearrange
the underlying C structures.
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/8fdfb91e-60fb-44fa-8df6-f5dea47353c9@eisentraut.org
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The function returns false if it fails to allocate memory, so
make sure to check the return value in callsites.
Author: Aleksander Alekseev <aleksander@tigerdata.com>
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Discussion: https://postgr.es/m/CAJ7c6TNPrU8ZxgdfN3PyGY1tzo0bgszx+KkqW0Z7zt3heyC1GQ@mail.gmail.com
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The URL for "Sorting and Searching Algorithms: A Cookbook"
by Thomas Niemann has started returning 404, and since we
refer to the page for license terms this replaces the now
defunct link with one to the copy on archive.org.
Author: Chao Li <lic@highgo.com>
Discussion: https://postgr.es/m/6DED3DEF-875E-4D1D-8F8F-7353D5AF7B79@gmail.com
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The TAP tests whose ok() calls are changed in this commit were relying
on perl operators, rather than equivalents available in Test::More. For
example, rather than the following:
ok($data =~ qr/expr/m, "expr matching");
ok($data !~ qr/expr/m, "expr not matching");
The new test code uses this equivalent:
like($data, qr/expr/m, "expr matching");
unlike($data, qr/expr/m, "expr not matching");
A huge benefit of the new formulation is that it is possible to know
about the values we are checking if a failure happens, making debugging
easier, should the test runs happen in the buildfarm, in the CI or
locally.
This change leads to more test code overall as perltidy likes to make
the code pretty the way it is in this commit.
Author: Sadhuprasad Patro <b.sadhu@gmail.com>
Discussion: https://postgr.es/m/CAFF0-CHhwNx_Cv2uy7tKjODUbeOgPrJpW4Rpf1jqB16_1bU2sg@mail.gmail.com
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042_low_level_backup compared the result of a query two times with a
comparison operator based on an integer, while the result should be
compared with a string.
The outcome of the tests is currently not impacted by this change.
However, it could be possible that the tests fail to detect future
issues if the query results become different, for some reason.
Oversight in 99b4a63bef94.
Author: Sadhuprasad Patro <b.sadhu@gmail.com>
Discussion: https://postgr.es/m/CAFF0-CHhwNx_Cv2uy7tKjODUbeOgPrJpW4Rpf1jqB16_1bU2sg@mail.gmail.com
Backpatch-through: 17
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040_pg_createsubscriber has been calling safe_psql(), that returns the
result of a SQL query, with ok() without checking the result generated
(in this case 't', for a number of publications).
The outcome of the tests is currently not impacted by this change.
However, it could be possible that the test fails to detect future
issues if the query results become different.
The test is rewritten so as the number of publications is checked. This
is not the fix suggested originally by the author, but this is more
reliable in the long run.
Oversight in e5aeed4b8020.
Author: Sadhuprasad Patro <b.sadhu@gmail.com>
Discussion: https://postgr.es/m/CAFF0-CHhwNx_Cv2uy7tKjODUbeOgPrJpW4Rpf1jqB16_1bU2sg@mail.gmail.com
Backpatch-through: 18
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The original formulation failed to take into account the fact that for
the PGXS case, the source dir is not $(top_srcdir), so it ended up not
doing anything. Handle it explicitly.
Author: Ryo Matsumura <matsumura.ryo@fujitsu.com>
Reviewed-by: Bryan Green <dbryan.green@gmail.com>
Backpatch-through: 13
Discussion: https://postgr.es/m/TYCPR01MB113164770FB0B0BE6ED21E68EE8DCA@TYCPR01MB11316.jpnprd01.prod.outlook.com
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Add a test case to cover pg_dump with --compress=none. This
brings the coverage of compress_none.c up from about 64% to 90%,
in particular covering the new code added in a previous patch.
Include compression of toc.dat in manually-compressed test cases.
We would have found the bug fixed in commit a239c4a0c much sooner
if we'd done this. As far as I can tell, this doesn't reduce test
coverage at all, since there are other tests of directory format
that still use an uncompressed toc.dat.
Widen the wide row used to verify correct (de) compression.
Commit 1a05c1d25 advises us (not without reason) to ensure that
this test case fully fills DEFAULT_IO_BUFFER_SIZE, so that loops
within the compression logic will iterate completely. To follow
that advice with the proposed DEFAULT_IO_BUFFER_SIZE of 128K,
we need something close to this. This does indeed increase the
reported code coverage by a few lines.
While here, fix a glitch that I noticed in testing: the
$glob_patterns tests were incapable of failing, because glob()
will return 'foo' as 'foo' whether there is a matching file or
not. (Indeed, the stanza just above that one relies on that.)
In my testing, this patch adds approximately as much runtime
as was saved by the previous patch, so that it's about a wash
compared to the old code. However, we get better test coverage.
Author: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/3515357.1760128017@sss.pgh.pa.us
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Add a new test script 006_pg_dump_compress.pl, containing just
the pg_dump tests specifically concerned with compression, and
remove those tests from 002_pg_dump.pl. We can also drop some
infrastructure in 002_pg_dump.pl that was used only for these tests.
The point of this is to avoid the cost of running these test
cases over and over in all the scenarios (runs) that 002_pg_dump.pl
exercises. We don't learn anything more about the behavior of the
compression code that way, and we expend significant amounts of
time, since one of these test cases is quite large and due to get
larger.
The intent of this specific patch is to provide exactly the same
coverage as before, except that I went back to using --no-sync
in all the test runs moved over to 006_pg_dump_compress.pl.
I think that avoiding that had basically been cargo-culted into
these test cases as a result of modeling them on the
defaults_custom_format test case; again, doing that over and over
isn't going to teach us anything new.
Author: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/3515357.1760128017@sss.pgh.pa.us
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After commit fe8192a95, compress_zstd.c tends to produce data block
sizes around 128K, and we don't really have any control over that
unless we want to overrule ZSTD_CStreamOutSize(). Which seems like
a bad idea. But let's try to align the other compression modes to
produce block sizes roughly comparable to that, so that pg_restore's
skip-data performance isn't enormously different for different modes.
gzip compression can be brought in line simply by setting
DEFAULT_IO_BUFFER_SIZE = 128K, which this patch does. That
increases some unrelated buffer sizes, but none of them seem
problematic for modern platforms.
lz4's idea of appropriate block size is highly nonlinear:
if we just increase DEFAULT_IO_BUFFER_SIZE then the output
blocks end up around 200K. I found that adjusting the slop
factor in LZ4State_compression_init was a not-too-ugly way
of bringing that number roughly into line.
With compress = none you get data blocks the same sizes as the
table rows, which seems potentially problematic for narrow tables.
Introduce a layer of buffering to make that case match the others.
Comments in compress_io.h and 002_pg_dump.pl suggest that if
we increase DEFAULT_IO_BUFFER_SIZE then we need to increase the
amount of data fed through the tests in order to improve coverage.
I've not done that here, leaving it for a separate patch.
Author: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/3515357.1760128017@sss.pgh.pa.us
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This information appears to have been unused since commit
c5b7ba4e67. We could not find any references in third-party code,
either.
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://postgr.es/m/aO_CyFRpbVMtgJWM%40nathan
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To support the upcoming addition of a sequence synchronization worker,
this patch extracts common synchronization logic shared by table sync
workers and the new sequence sync worker into a dedicated file. This
modularization improves code reuse, maintainability, and clarity in the
logical workers framework.
Author: vignesh C <vignesh21@gmail.com>
Author: Hou Zhijie <houzj.fnst@fujitsu.com>
Reviewed-by: shveta malik <shveta.malik@gmail.com>
Reviewed-by: Dilip Kumar <dilipbalaut@gmail.com>
Reviewed-by: Peter Smith <smithpb2250@gmail.com>
Reviewed-by: Hayato Kuroda <kuroda.hayato@fujitsu.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Reviewed-by: Amit Kapila <amit.kapila16@gmail.com>
Discussion: https://postgr.es/m/CAA4eK1LC+KJiAkSrpE_NwvNdidw9F2os7GERUeSxSKv71gXysQ@mail.gmail.com
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EvalPlanQualStart() failed to propagate es_partition_directory into
the child EState used for EPQ rechecks. When execution time partition
pruning ran during the EPQ scan, executor code dereferenced a NULL
partition directory and crashed.
Previously, propagating es_partition_directory into the EPQ EState was
unnecessary because CreatePartitionPruneState(), which sets it on
demand, also initialized the exec-pruning context. After commit
d47cbf474, CreatePartitionPruneState() now initializes only the init-
time pruning context, leaving exec-pruning context initialization to
ExecInitNode(). Since EvalPlanQualStart() runs only ExecInitNode() and
not CreatePartitionPruneState(), it can encounter a NULL
es_partition_directory. Other executor fields initialized during
CreatePartitionPruneState() are already copied into the child EState
thanks to commit 8741e48e5d, but es_partition_directory was missed.
Fix by borrowing the parent estate's es_partition_directory in
EvalPlanQualStart(), and by clearing that field in EvalPlanQualEnd()
so the parent remains responsible for freeing the directory.
Add an isolation test permutation that triggers EPQ with execution-
time partition pruning, the case that reproduces this crash.
Bug: #19078
Reported-by: Yuri Zamyatin <yuri@yrz.am>
Diagnosed-by: David Rowley <dgrowleyml@gmail.com>
Author: David Rowley <dgrowleyml@gmail.com>
Co-authored-by: Amit Langote <amitlangote09@gmail.com>
Discussion: https://postgr.es/m/19078-dfd62f840a2c0766@postgresql.org
Backpatch-through: 18
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Per report from buildfarm member prion. The CI does not use this
parameter, and this buildfarm member sets log_error_verbosity to
"verbose". This would generate extra LOCATION entries in the logs,
causing the regexps of the test to fail.
Trying to support log_error_verbosity=verbose in the test would mean to
tweak all the regexps used in the test to detect an optional set of
LOCATION lines, at least. This would not improve the coverage, and
forcing the GUC value is simpler.
Oversight in 76bba033128a.
Discussion: https://postgr.es/m/aPBaNNGiYT3xMBN1@paquier.xyz
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Temporary file usage is sometimes attributed to the wrong query in the logs
output. One identified reason is that unnamed portal cleanup (and
consequently temp file logging) happens during the next BIND message as
a, after debug_query_string has already been updated to the new query.
Dropping an unnamed portal in the next BIND message is a rather old
protocol behavior (fe19e56c572f, also mentioned in the docs).
log_temp_files is a bit newer than that, as of be8a4318815.
This commit adds tests to track which query is displayed next to the
temporary file(s) removed when a portal is dropped, and in some cases if
a query is displayed or not. We have not concluded how to improve the
situation yet; these tests will at least help in checking what changes
in the logs depending on the proposal discussed and how it affects the
scenarios tracked by this new test.
Author: Sami Imseih <samimseih@gmail.com>
Author: Frédéric Yhuel <frederic.yhuel@dalibo.com>
Reviewed-by: Mircea Cadariu <cadariu.mircea@gmail.com>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://postgr.es/m/3d07ee43-8855-42db-97e0-bad5db82d972@dalibo.com
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This commit adjusts RangeVarCallbackForReindexIndex() to handle an
extremely unlikely race condition involving concurrent OID reuse.
In short, if REINDEX INDEX is executed at the same time that the
index is re-created with the same name and OID but a different
parent table OID, we might lock the wrong parent table. To fix,
simply detect when this happens and emit an ERROR. Unfortunately,
we can't gracefully handle this situation because we will have
already locked the index, and we must lock the parent table before
the index to avoid deadlocks.
While at it, I've replaced all but one early return in this
callback function with ERRORs that should be unreachable. While I
haven't verified the presence of a live bug, the checks in question
appear to be unnecessary, and the early returns seem prone to
breaking the parent table locking code in subtle ways. If nothing
else, this simplifies the code a bit.
This is a bug fix and could be back-patched, but given the presumed
rarity of the race condition and the lack of reports, I'm not going
to bother.
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: Jeff Davis <pgsql@j-davis.com>
Discussion: https://postgr.es/m/Z8zwVmGzXyDdkAXj%40nathan
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Per-character pg_locale_t APIs. Useful for tsearch parsing and
potentially other places.
Significant overlap with the regc_wc_isalpha() and related functions
in regc_pg_locale.c, but this change leaves those intact for
now.
Discussion: https://postgr.es/m/0151ad01239e2cc7b3139644358cf8f7b9622ff7.camel@j-davis.com
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Presently, these functions look up the relation's OID, lock it, and
then check privileges. Not only does this approach provide no
guarantee that the locked relation matches the arguments of the
lookup, but it also allows users to briefly lock relations for
which they do not have privileges, which might enable
denial-of-service attacks. This commit adjusts these functions to
use RangeVarGetRelidExtended(), which is purpose-built to avoid
both of these issues. The new RangeVarGetRelidCallback function is
somewhat complicated because it must handle both tables and
indexes, and for indexes, we must check privileges on the parent
table and lock it first. Also, it needs to handle a couple of
extremely unlikely race conditions involving concurrent OID reuse.
A downside of this change is that the coding doesn't allow for
locking indexes in AccessShare mode anymore; everything is locked
in ShareUpdateExclusive mode. Per discussion, the original choice
of lock levels was intended for a now defunct implementation that
used in-place updates, so we believe this change is okay.
Reviewed-by: Jeff Davis <pgsql@j-davis.com>
Discussion: https://postgr.es/m/Z8zwVmGzXyDdkAXj%40nathan
Backpatch-through: 18
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This is not specific to the GUC parameter type, so it can be part of
the generic struct rather than the type-specific struct (like the
related "extra" field). This allows for some code simplifications.
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/8fdfb91e-60fb-44fa-8df6-f5dea47353c9@eisentraut.org
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