RelFileNumbers are now assigned using a separate counter, instead of
being assigned from the OID counter. This counter never wraps around:
if all 2^56 possible RelFileNumbers are used, an internal error
occurs. As the cluster is limited to 2^64 total bytes of WAL, this
limitation should not cause a problem in practice.
If the counter were 64 bits wide rather than 56 bits wide, we would
need to increase the width of the BufferTag, which might adversely
impact buffer lookup performance. Also, this lets us use bigint for
pg_class.relfilenode and other places where these values are exposed
at the SQL level without worrying about overflow.
This should remove the need to keep "tombstone" files around until
the next checkpoint when relations are removed. We do that to keep
RelFileNumbers from being recycled, but now that won't happen
anyway. However, this patch doesn't actually change anything in
this area; it just makes it possible for a future patch to do so.
Dilip Kumar, based on an idea from Andres Freund, who also reviewed
some earlier versions of the patch. Further review and some
wordsmithing by me. Also reviewed at various points by Ashutosh
Sharma, Vignesh C, Amul Sul, Álvaro Herrera, and Tom Lane.
Discussion: http://postgr.es/m/CA+Tgmobp7+7kmi4gkq7Y+4AM9fTvL+O1oQ4-5gFTT+6Ng-dQ=g@mail.gmail.com
Previously, these were declared in postgres_ext.h, but they are not
needed nearly so widely as the OID declarations, so that doesn't
necessarily make sense. Also, because postgres_ext.h is included
before most of c.h has been processed, the previous location creates
some problems for a pending patch.
Patch by me, reviewed by Dilip Kumar.
Discussion: http://postgr.es/m/CA+TgmoYc8oevMqRokZQ4y_6aRn-7XQny1JBr5DyWR_jiFtONHw@mail.gmail.com
Push the units fields over to the left so that all the single-bit
flags can be together. I considered rearranging the single-bit
flags to try to group flags with similar purposes, but eventually
decided that that involved too many judgment calls.
Discussion: https://postgr.es/m/17385-9ee529fb091f0ce5@postgresql.org
Previously, the transaction-property GUCs such as transaction_isolation
could be reset after starting a transaction, because we marked them
as GUC_NO_RESET_ALL but still allowed a targeted RESET. That leads to
assertion failures or worse, because those properties aren't supposed
to change after we've acquired a transaction snapshot.
There are some NO_RESET_ALL variables for which RESET is okay, so
we can't just redefine the semantics of that flag. Instead introduce
a separate GUC_NO_RESET flag. Mark "seed", as well as the transaction
property GUCs, as GUC_NO_RESET.
We have to disallow GUC_ACTION_SAVE as well as straight RESET, because
otherwise a function having a "SET transaction_isolation" clause can
still break things: the end-of-function restore action is equivalent
to a RESET.
No back-patch, as it's conceivable that someone is doing something
this patch will forbid (like resetting one of these GUCs at transaction
start, or "CREATE FUNCTION ... SET transaction_read_only = 1") and not
running into problems with it today. Given how long we've had this
issue and not noticed, the side effects in non-assert builds can't be
too serious.
Per bug #17385 from Andrew Bille.
Masahiko Sawada
Discussion: https://postgr.es/m/17385-9ee529fb091f0ce5@postgresql.org
While at it, remove an unused queryString parameter from
CheckPubRelationColumnList() and make other minor stylistic changes.
Backpatch to 15.
Reported by Kyotaro Horiguchi <horikyota.ntt@gmail.com>
Co-authored-by: Hou zj <houzj.fnst@fujitsu.com>
Discussion: https://postgr.es/m/20220926.160426.454497059203258582.horikyota.ntt@gmail.com
We weren't jumbling the merge action list, so wildly different commands
would be considered to use the same query ID. Add that, mention it in
the docs, and some test lines.
Backpatch to 15.
Author: Tatsu <bt22nakamorit@oss.nttdata.com>
Reviewed-by: Julien Rouhaud <rjuju123@gmail.com>
Discussion: https://postgr.es/m/d87e391694db75a038abc3b2597828e8@oss.nttdata.com
While I (Andres) had planned to use relative rpaths, it looks like agreeing on
the precise path might take a bit. So set up absolute rpaths for now.
I'm pushing this fairly quickly after posting the patch as several hackers
fought with this issue.
Discussion: https://postgr.es/m/20220927011951.j3h4o7n6bhf7dwau@awork3.anarazel.de
This was used as the returned result type of the generated contents for
the backup_label and backup history files. This is replaced by a simple
string, reducing the cleanup burden of all the callers of
build_backup_content().
Reviewed-by: Bharath Rupireddy
Discussion: https://postgr.es/m/YzERvNPaZivHEKZJ@paquier.xyz
Historically we've been more worried about making the output of
float fields look pretty than whether they'd be read back exactly.
That won't work if we're to compare the read-back nodes for
equality, so switch to using the Ryu code for float output.
Author: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/flat/4159834.1657405226@sss.pgh.pa.us
Historically, outToken has represented both NULL and empty-string
strings as "<>", which readfuncs.c then read as NULL, thus failing
to preserve empty-string fields accurately. Remarkably, this has
not caused any serious problems yet, but let's fix it.
We'll keep the "<>" notation for NULL, and use """" for empty string,
because that matches other notational choices already in use.
An actual input string of """" is converted to "\""" (this was true
already, apparently as a hangover from an ancient time when string
quoting was handled directly by pg_strtok).
CHAR fields also use "<>", but for '\0'.
Author: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/flat/4159834.1657405226@sss.pgh.pa.us
This change simplifies some of the logic related to the generation and
creation of the backup_label and backup history files, which has become
unnecessarily complicated since the removal of the exclusive backup mode
in commit 39969e2. The code was previously generating the contents of
these files as a string (start phase for the backup_label and stop phase
for the backup history file), one problem being that the contents of the
backup_label string were scanned to grab some of its internal contents
at the stop phase.
This commit changes the logic so as we store the data required to build
these files in an intermediate structure named BackupState. The
backup_label file and backup history file strings are generated when
they are ready to be sent back to the client. Both files are now
generated with the same code path. While on it, this commit renames
some variables for clarity.
Two new files named xlogbackup.{c,h} are introduced in this commit, to
remove from xlog.c some of the logic around base backups. Note that
more could be moved to this new set of files.
Author: Bharath Rupireddy, Michael Paquier
Reviewed-by: Fujii Masao
Discussion: https://postgr.es/m/CALj2ACXWwTDgJqCjdaPyfR7djwm6SrybGcrZyrvojzcsmt4FFw@mail.gmail.com
Commit 25936fd46 adjusted things so that the "storeslot" we use
for remapping trigger tuples would have adequate lifespan, but it
neglected to consider the lifespan of the tuple descriptor that
the slot depends on. It turns out that in at least some cases, the
tupdesc we are passing is a refcounted tupdesc, and the refcount for
the slot's reference can get assigned to a resource owner having
different lifespan than the slot does. That leads to an error like
"tupdesc reference 0x7fdef236a1b8 is not owned by resource owner
SubTransaction". Worse, because of a second oversight in the same
commit, we'd try to free the same tupdesc refcount again while
cleaning up after that error, leading to recursive errors and an
"ERRORDATA_STACK_SIZE exceeded" PANIC.
To fix the initial problem, let's just make a non-refcounted copy
of the tupdesc we're supposed to use. That seems likely to guard
against additional problems, since there's no strong reason for
this code to assume that what it's given is a refcounted tupdesc;
in which case there's an independent hazard of the tupdesc having
shorter lifespan than the slot does. (I didn't bother trying to
free said copy, since it should go away anyway when the (sub)
transaction context is cleaned up.)
The other issue can be fixed by making the code added to
AfterTriggerFreeQuery work like the rest of that function, ie be
sure that it doesn't try to free the same slot twice in the event
of recursive error cleanup.
While here, also clean up minor stylistic issues in the test case
added by 25936fd46: don't use "create or replace function", as any
name collision within the tests is likely to have ill effects
that that won't mask; and don't use function names as generic as
trigger_function1, especially if you're not going to drop them
at the end of the test stanza.
Per bug #17607 from Thomas Mc Kay. Back-patch to v12, as the
previous fix was.
Discussion: https://postgr.es/m/17607-bd8ccc81226f7f80@postgresql.org
Commit 4fb5c794e intended to add coverage of some ambuildempty
methods that were not getting reached, without removing any
test coverage. However, by changing a temp table to unlogged
it managed to negate the intent of 4c51a2d1e, which means that
we didn't have reliable test coverage of ginvacuum.c anymore.
As things stand, much of that file might or might not get reached
depending on timing, which seems pretty undesirable.
Although this is only clearly broken for the GIN test, it seems
best to revert 4fb5c794e altogether and instead add bespoke test
cases covering unlogged indexes for these four AMs. We don't
need to do very much with them, so the extra tests are cheap.
(Note that btree, hash, and bloom already have similar test cases,
so they need no additional work.)
We can also undo dec8ad367. Since the testing deficiency that that
hacked around was later fixed by 2f2e24d90, let's intentionally leave
an unlogged table behind to improve test coverage in the modules that
use the regression database for other test purposes. (The case I used
also leaves an unlogged sequence behind.)
Per report from Alex Kozhemyakin. Back-patch to v15 where the
faulty test came in.
Discussion: https://postgr.es/m/b00c8ee096ee46cd25c183125562a1a7@postgrespro.ru
The node types A_Const, Constraint, and A_Expr had custom output
functions, but no read functions were implemented so far.
The A_Expr output format had to be tweaked a bit to make it easier to
parse.
Be a bit more cautious about applying strncmp to unterminated strings.
Also error out if an unrecognized enum value is found in each case,
instead of just printing a placeholder value. That was maybe ok for
debugging but won't work if we want to have robust round-tripping.
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/flat/4159834.1657405226@sss.pgh.pa.us
The node tokenizer went out of its way to store BitString node values
without the leading 'b'. But everything else in the system stores the
leading 'b'. This would break if a BitString node is
read-printed-read.
Also, the node tokenizer didn't know that BitString node tokens could
also start with 'x'.
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/flat/4159834.1657405226@sss.pgh.pa.us
The main parser checks whether a literal fits into an int when
deciding whether it should be put into an Integer or Float node. The
parser processes integer literals without signs. So a most-negative
integer literal will not fit into Integer and will end up as a Float
node.
The node tokenizer did this differently. It included the sign when
checking whether the literal fit into int. So a most-negative integer
would indeed fit that way and end up as an Integer node.
In order to preserve the node structure correctly, we need the node
tokenizer to also analyze integer literals without sign.
There are a number of test cases in the regression tests that have a
most-negative integer argument of some utility statement, so this
issue is easily reproduced under WRITE_READ_PARSE_PLAN_TREES.
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/flat/4159834.1657405226@sss.pgh.pa.us
There's really no need to build win32ver.rc as part of building
pgmsgevent.rc. This will make it sligthly easier to add rc file generation to
the meson build.
Because index creation does not go through heap_create_with_catalog() we
didn't call pgstat_create_relation(), leading to index stats of a newly
created realtion not getting dropped during rollback. To fix, move the
pgstat_create_relation() to heap_create(), which indexes do use.
Similarly, because dropping an index does not go through
heap_drop_with_catalog(), we didn't drop index stats when the transaction
dropping an index committed. Here there's no convenient common path for
indexes and relations, so index_drop() now calls pgstat_drop_relation().
Add tests for transactional index stats handling.
Author: "Drouvot, Bertrand" <bdrouvot@amazon.com>
Reviewed-by: Andres Freund <andres@anarazel.de>
Reviewed-by: Kyotaro Horiguchi <horikyota.ntt@gmail.com>
Discussion: https://postgr.es/m/51bbf286-2b4a-8998-bd12-eaae4b765d99@amazon.com
Backpatch: 15-, like 8b1dccd37c, which introduced the bug
The extended query protocol implementation I added in commit
acb7e4eb6b has bugs when used in pipeline mode. Rather than spend
more time trying to fix it, remove that code and make the function rely
on simple query protocol only, meaning it can no longer be used in
pipeline mode.
Users can easily change their applications to use PQsendQueryParams
instead. We leave PQsendQuery in place for Postgres 14, just in case
somebody is using it and has not hit the mentioned bugs; but we should
recommend that it not be used.
Backpatch to 15.
Per bug report from Gabriele Varrazzo.
Discussion: https://postgr.es/m/CA+mi_8ZGSQNmW6-mk_iSR4JZB_LJ4ww3suOF+1vGNs3MrLsv4g@mail.gmail.com
The "emulation" I wrote for PQsendQuery in pipeline mode to use extended
query protocol, in commit acb7e4eb6b, is problematic. Due to numerous
bugs we'll soon remove it. As a first step and for all branches back to
14, stop using PQsendQuery in libpq_pipeline. Also remove a few test
lines that will no longer be relevant.
Backpatch to 14.
Discussion: https://postgr.es/m/CA+mi_8ZGSQNmW6-mk_iSR4JZB_LJ4ww3suOF+1vGNs3MrLsv4g@mail.gmail.com
Ommitted in e6b6ea025c, but necessary for libintl to be found. All other
dependencies can be found via pkg-config (which searches in /usr/local/...)
and thus worked even without adding the directories.
We previously thought that allowing such cases can confuse users when they
specify DROP TABLES IN SCHEMA but that doesn't seem to be the case based
on discussion. This helps to uplift the restriction during
ALTER TABLE ... SET SCHEMA which used to ensure that we couldn't end up
with a publication having both a schema and the same schema's table.
To allow this, we need to forbid having any schema on a publication if
column lists on a table are specified (and vice versa). This is because
otherwise we still need a restriction during ALTER TABLE ... SET SCHEMA to
forbid cases where it could lead to a publication having both a schema and
the same schema's table with column list.
Based on suggestions by Peter Eisentraut.
Author: Hou Zhijie and Vignesh C
Reviewed-By: Peter Smith, Amit Kapila
Backpatch-through: 15, where it was introduced
Discussion: https://postgr.es/m/2729c9e2-9aac-8cda-f2f4-34f2bcc18f4e@enterprisedb.com
The pg_dump and pg_dumpall man pages referred to app-psql-patterns
as appearing "below", which I suspect was copied-and-pasted from
equivalent text in psql-ref.sgml rather than being actually thought
through. At least to me, that phrasing means "later in this same
web page/section", which this link target is not. Drop the
misleading and unnecessary-in-any-case adjective.
Make sure that function declarations use names that exactly match the
corresponding names from function definitions in pg_dump/pg_dumpall
related code.
Affected code happens to be inconsistent in how it applies conventions
around how Archive and Archive Handle variables are named. Significant
code churn is required to fully fix those inconsistencies, so take the
least invasive approach possible: treat function definition names as
authoritative, and mechanically adjust corresponding names from function
definitions to match.
Like other recent commits that cleaned up function parameter names, this
commit was written with help from clang-tidy.
Author: Peter Geoghegan <pg@bowt.ie>
Reviewed-By: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/CAH2-Wzmma+vzcO6gr5NYDZ+sx0G14aU-UrzFutT2FoRaisVCUQ@mail.gmail.com
Make sure that function declarations use names that exactly match the
corresponding names from function definitions in contrib code.
Like other recent commits that cleaned up function parameter names, this
commit was written with help from clang-tidy.
Author: Peter Geoghegan <pg@bowt.ie>
Discussion: https://postgr.es/m/CAH2-WznJt9CMM9KJTMjJh_zbL5hD9oX44qdJ4aqZtjFi-zA3Tg@mail.gmail.com
Make ecpg function declarations consistently use named parameters. Also
make sure that the declarations use names that match corresponding names
from function definitions.
Like other recent commits that cleaned up function parameter names, this
commit was written with help from clang-tidy.
Author: Peter Geoghegan <pg@bowt.ie>
Reviewed-By: David Rowley <dgrowleyml@gmail.com>
Discussion: https://postgr.es/m/CAH2-WznJt9CMM9KJTMjJh_zbL5hD9oX44qdJ4aqZtjFi-zA3Tg@mail.gmail.com
This may be a bit too subtle, but removing that word from there makes
this clause no longer a perfect parallel of the GRANT variant "ALL
TABLES IN SCHEMA": indeed, for publications what we record is the schema
itself, not the tables therein, which means that any tables added to the
schema in the future are also published. This is completely different
to what GRANT does, which is affect only the tables that exist when the
command is executed.
There isn't resounding support for this change, but there are a few
positive votes and no opposition. Because the time to 15 RC1 is very
short, let's get this out now.
Backpatch to 15.
Discussion: https://postgr.es/m/2729c9e2-9aac-8cda-f2f4-34f2bcc18f4e
Commit 5ef1eefd76, which added
archive_library, purged most mentions of archive_command from the
documentation. This is inappropriate, since archive_command is still
a feature in use and users will want to see information about it.
This restores all the removed mentions and rephrases things so that
archive_command and archive_library are presented as alternatives of
each other.
Reviewed-by: Nathan Bossart <nathandbossart@gmail.com>
Discussion: https://www.postgresql.org/message-id/9366d634-a917-85a9-4991-b2a4859edaf9@enterprisedb.com
The bounds hardcoded in compression.c since ffd5365 (minimum at 1 and
maximum at 22) do not match the reality of what zstd is able to
handle, these values being available via ZSTD_maxCLevel() and
ZSTD_minCLevel() at run-time. The maximum of 22 is actually correct
in recent versions, but the minimum was not as the library can go down
to -131720 by design. This commit changes the code to use the run-time
values in the code instead of some hardcoded ones.
Zstd seems to assume that these bounds could change in the future, and
Postgres will be able to adapt automatically to such changes thanks to
what's being done in this commit.
Reported-by: Justin Prysby
Discussion: https://postgr.es/m/20220922033716.GL31833@telsasoft.com
Backpatch-through: 15
The Windows task is changed to use meson as there currently is no way to run
all tests in the old MSVC build system (only ninja is covered for now, we
don't have enough CI resources to test msbuild as well).
To maintain autoconf coverage, the Linux task is duplicated to test both meson
and autoconf builds (linux is currently the fastest task). FreeBSD and macOS
are also converted to meson, as it seems more important to have coverage for
meson than autoconf.
Author: Andres Freund <andres@anarazel.de>
Author: Nazir Bilal Yavuz <byavuz81@gmail.com>
Author: Justin Pryzby <pryzby@telsasoft.com>
Autoconf is showing its age, fewer and fewer contributors know how to wrangle
it. Recursive make has a lot of hard to resolve dependency issues and slow
incremental rebuilds. Our home-grown MSVC build system is hard to maintain for
developers not using Windows and runs tests serially. While these and other
issues could individually be addressed with incremental improvements, together
they seem best addressed by moving to a more modern build system.
After evaluating different build system choices, we chose to use meson, to a
good degree based on the adoption by other open source projects.
We decided that it's more realistic to commit a relatively early version of
the new build system and mature it in tree.
This commit adds an initial version of a meson based build system. It supports
building postgres on at least AIX, FreeBSD, Linux, macOS, NetBSD, OpenBSD,
Solaris and Windows (however only gcc is supported on aix, solaris). For
Windows/MSVC postgres can now be built with ninja (faster, particularly for
incremental builds) and msbuild (supporting the visual studio GUI, but
building slower).
Several aspects (e.g. Windows rc file generation, PGXS compatibility, LLVM
bitcode generation, documentation adjustments) are done in subsequent commits
requiring further review. Other aspects (e.g. not installing test-only
extensions) are not yet addressed.
When building on Windows with msbuild, builds are slower when using a visual
studio version older than 2019, because those versions do not support
MultiToolTask, required by meson for intra-target parallelism.
The plan is to remove the MSVC specific build system in src/tools/msvc soon
after reaching feature parity. However, we're not planning to remove the
autoconf/make build system in the near future. Likely we're going to keep at
least the parts required for PGXS to keep working around until all supported
versions build with meson.
Some initial help for postgres developers is at
https://wiki.postgresql.org/wiki/Meson
With contributions from Thomas Munro, John Naylor, Stone Tickle and others.
Author: Andres Freund <andres@anarazel.de>
Author: Nazir Bilal Yavuz <byavuz81@gmail.com>
Author: Peter Eisentraut <peter@eisentraut.org>
Reviewed-By: Peter Eisentraut <peter.eisentraut@enterprisedb.com>
Discussion: https://postgr.es/m/20211012083721.hvixq4pnh2pixr3j@alap3.anarazel.de
Robert Haas