Thanks to commit 5af0263afd, binaryheap is available to frontend
code. This commit replaces the open-coded heap implementation in
pg_dump_sort.c with a binaryheap, saving a few lines of code.
Reviewed-by: Tom Lane
Discussion: https://postgr.es/m/3612876.1689443232%40sss.pgh.pa.us
Presently, parallel restores spend a lot of time sorting this list
so that we pick the largest items first. With many tables, this
sorting can become a significant bottleneck. There are a couple of
reports from the field about this, and it is easy to reproduce.
This commit improves the performance of parallel pg_restore with
many tables by converting its ready_list to a priority queue, i.e.,
a binary heap. We will first try to run the highest priority item,
but if it cannot be chosen due to the lock heuristic, we'll do a
sequential scan through the heap nodes until we find one that is
runnable. This means that we might end up picking an item with a
much lower priority. However, we expect that we will typically be
able to pick one of the first few items, which should usually have
a relatively high priority.
Suggested-by: Tom Lane
Tested-by: Pierre Ducroquet
Reviewed-by: Tom Lane
Discussion: https://postgr.es/m/3612876.1689443232%40sss.pgh.pa.us
This commit allows specifying a --sync-method in several frontend
utilities that must synchronize many files to disk (initdb,
pg_basebackup, pg_checksums, pg_dump, pg_rewind, and pg_upgrade).
On Linux, users can specify "syncfs" to synchronize the relevant
file systems instead of calling fsync() for every single file. In
many cases, using syncfs() is much faster.
As with recovery_init_sync_method, this new option comes with some
caveats. The descriptions of these caveats have been moved to a
new appendix section in the documentation.
Co-authored-by: Justin Pryzby
Reviewed-by: Michael Paquier, Thomas Munro, Robert Haas, Justin Pryzby
Discussion: https://postgr.es/m/20210930004340.GM831%40telsasoft.com
This commit adds support for using syncfs() in fsync_pgdata() and
fsync_dir_recurse() (which have been renamed to sync_pgdata() and
sync_dir_recurse()). Like recovery_init_sync_method,
sync_pgdata() calls syncfs() for the data directory, each
tablespace, and pg_wal (if it is a symlink). For now, all of the
frontend utilities that use these support functions are hard-coded
to use fsync(), but a follow-up commit will allow specifying
syncfs().
Co-authored-by: Justin Pryzby
Reviewed-by: Michael Paquier
Discussion: https://postgr.es/m/20210930004340.GM831%40telsasoft.com
We now create contype='n' pg_constraint rows for not-null constraints.
We propagate these constraints to other tables during operations such as
adding inheritance relationships, creating and attaching partitions and
creating tables LIKE other tables. We also spawn not-null constraints
for inheritance child tables when their parents have primary keys.
These related constraints mostly follow the well-known rules of
conislocal and coninhcount that we have for CHECK constraints, with some
adaptations: for example, as opposed to CHECK constraints, we don't
match not-null ones by name when descending a hierarchy to alter it,
instead matching by column name that they apply to. This means we don't
require the constraint names to be identical across a hierarchy.
For now, we omit them for system catalogs. Maybe this is worth
reconsidering. We don't support NOT VALID nor DEFERRABLE clauses
either; these can be added as separate features later (this patch is
already large and complicated enough.)
psql shows these constraints in \d+.
pg_dump requires some ad-hoc hacks, particularly when dumping a primary
key. We now create one "throwaway" not-null constraint for each column
in the PK together with the CREATE TABLE command, and once the PK is
created, all those throwaway constraints are removed. This avoids
having to check each tuple for nullness when the dump restores the
primary key creation.
pg_upgrading from an older release requires a somewhat brittle procedure
to create a constraint state that matches what would be created if the
database were being created fresh in Postgres 17. I have tested all the
scenarios I could think of, and it works correctly as far as I can tell,
but I could have neglected weird cases.
This patch has been very long in the making. The first patch was
written by Bernd Helmle in 2010 to add a new pg_constraint.contype value
('n'), which I (Álvaro) then hijacked in 2011 and 2012, until that one
was killed by the realization that we ought to use contype='c' instead:
manufactured CHECK constraints. However, later SQL standard
development, as well as nonobvious emergent properties of that design
(mostly, failure to distinguish them from "normal" CHECK constraints as
well as the performance implication of having to test the CHECK
expression) led us to reconsider this choice, so now the current
implementation uses contype='n' again. During Postgres 16 this had
already been introduced by commit e056c557ae, but there were some
problems mainly with the pg_upgrade procedure that couldn't be fixed in
reasonable time, so it was reverted.
In 2016 Vitaly Burovoy also worked on this feature[1] but found no
consensus for his proposed approach, which was claimed to be closer to
the letter of the standard, requiring an additional pg_attribute column
to track the OID of the not-null constraint for that column.
[1] https://postgr.es/m/CAKOSWNkN6HSyatuys8xZxzRCR-KL1OkHS5-b9qd9bf1Rad3PLA@mail.gmail.com
Author: Álvaro Herrera <alvherre@alvh.no-ip.org>
Author: Bernd Helmle <mailings@oopsware.de>
Reviewed-by: Justin Pryzby <pryzby@telsasoft.com>
Reviewed-by: Peter Eisentraut <peter.eisentraut@enterprisedb.com>
Reviewed-by: Dean Rasheed <dean.a.rasheed@gmail.com>
In-place tablespaces would be dumped with the path produced by
pg_tablespace_location(), which is in this case a relative path built as
pg_tblspc/OID, but this would fail to restore as such tablespaces need
to use an empty string as location. In order to detect if an in-place
tablespace is used, this commit checks if the path returned is relative
and adapts the dump contents in consequence.
Like the other changes related to in-place tablespaces, no backpatch is
done as these are only intended for development purposes. Rui Zhao has
fixed the code, while the test is from me.
Author: Rui Zhao, Michael Paquier
Discussion: https://postgr.es/m/80c80b4a-b87b-456f-bd46-1ae326601d79.xiyuan.zr@alibaba-inc.com
Until now, when DROP DATABASE got interrupted in the wrong moment, the removal
of the pg_database row would also roll back, even though some irreversible
steps have already been taken. E.g. DropDatabaseBuffers() might have thrown
out dirty buffers, or files could have been unlinked. But we continued to
allow connections to such a corrupted database.
To fix this, mark databases invalid with an in-place update, just before
starting to perform irreversible steps. As we can't add a new column in the
back branches, we use pg_database.datconnlimit = -2 for this purpose.
An invalid database cannot be connected to anymore, but can still be
dropped.
Unfortunately we can't easily add output to psql's \l to indicate that some
database is invalid, it doesn't fit in any of the existing columns.
Add tests verifying that a interrupted DROP DATABASE is handled correctly in
the backend and in various tools.
Reported-by: Evgeny Morozov <postgresql3@realityexists.net>
Author: Andres Freund <andres@anarazel.de>
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Reviewed-by: Thomas Munro <thomas.munro@gmail.com>
Discussion: https://postgr.es/m/20230509004637.cgvmfwrbht7xm7p6@awork3.anarazel.de
Discussion: https://postgr.es/m/20230314174521.74jl6ffqsee5mtug@awork3.anarazel.de
Backpatch: 11-, bug present in all supported versions
Several commands internally assemble command lines to call other
commands. This includes initdb, pg_dumpall, and pg_regress. (Also
pg_ctl, but that is different enough that I didn't consider it here.)
This has all evolved a bit organically, with fixed-size buffers, and
various optional command-line arguments being injected with
confusing-looking code, and the spacing between options handled in
inconsistent ways. Clean all this up a bit to look clearer and be
more easily extensible with new arguments and options. We start each
command with printfPQExpBuffer(), and then append arguments as
necessary with appendPQExpBuffer(). Also standardize on using
initPQExpBuffer() over createPQExpBuffer() where possible. pg_regress
uses StringInfo instead of PQExpBuffer, but many of the same ideas
apply.
Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi>
Discussion: https://www.postgresql.org/message-id/flat/16d0beac-a141-e5d3-60e9-323da75f49bf@eisentraut.org
A new-style SQL function can contain a parse-time dependency
on a unique index, much as views and matviews can (such cases
arise from GROUP BY and ON CONFLICT clauses, for example).
To dump and restore such a function successfully, pg_dump must
postpone the function until after the unique index is created,
which will happen in the post-data part of the dump. Therefore
we have to remove the normal constraint that functions are
dumped in pre-data. Add code similar to the existing logic
that handles this for matviews. I added test cases for both
as well, since code coverage tests showed that we weren't
testing the matview logic.
Per report from Sami Imseih. Back-patch to v14 where
new-style SQL functions came in.
Discussion: https://postgr.es/m/2C1933AB-C2F8-499B-9D18-4AC1882256A0@amazon.com
Two places in pg_dump_sort.c were using pg_log_info() to add
more details to a message printed with pg_log_warning().
This is bad, because at default verbosity level we would
print the warning line but not the details. One should use
pg_log_warning_detail() or pg_log_warning_hint() instead.
Commit 9a374b77f got rid of most such abuses, but unaccountably
missed these.
Noted while studying a bug report from Sami Imseih.
Back-patch to v15 where 9a374b77f came in. (Prior versions
don't have the missing-details misbehavior, for reasons
I didn't bother to track down.)
Discussion: https://postgr.es/m/2C1933AB-C2F8-499B-9D18-4AC1882256A0@amazon.com
Run pgindent, pgperltidy, and reformat-dat-files.
This set of diffs is a bit larger than typical. We've updated to
pg_bsd_indent 2.1.2, which properly indents variable declarations that
have multi-line initialization expressions (the continuation lines are
now indented one tab stop). We've also updated to perltidy version
20230309 and changed some of its settings, which reduces its desire to
add whitespace to lines to make assignments etc. line up. Going
forward, that should make for fewer random-seeming changes to existing
code.
Discussion: https://postgr.es/m/20230428092545.qfb3y5wcu4cm75ur@alvherre.pgsql
LZ4File_write() did not advance the input pointer on subsequent invocations of
LZ4F_compressUpdate(). As a result the generated compressed output would be a
compressed version of the same input chunk.
Tests failed to catch this error because the data would comfortably fit
within the default buffer size, as a single chunk. Tests have been added
to provide adequate coverage of multi-chunk compression.
WriteDataToArchiveLZ4() which is also using LZ4F_compressUpdate() did
not suffer from this omission.
Author: Georgios Kokolatos <gkokolatos@pm.me>
Reported-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://postgr.es/m/ZFhCyn4Gm2eu60rB%40paquier.xyz
LZ4Stream_gets did not null-terminate its output buffer. The callers expected
the buffer to be null-terminated and passed it around to functions such as
sscanf with unintended consequences.
Author: Georgios Kokolatos <gkokolatos@pm.me>
Reported-by: Alexander Lakhin <exclusion@gmail.com>
Discussion: https://postgr.es/m/94ae9bca-5ebb-1e68-bb7b-4f32e89fefbe@gmail.com
As written, pg_dump would call twice parse_compress_specification() for
the custom and directory formats to build a compression specification if
no compression option is defined, as these formats should be compressed
by default when compiled with zlib, or use no compression without zlib.
This made the code logic quite confusing, and the first compression
specification built would be incorrect before being overwritten by the
second one.
Rather than creating two compression specifications, this commit changes
a bit the order of the checks for the compression options so as
compression_algorithm_str is now set to a correct value for the custom
and format directory when no compression option is defined. This makes
the code easier to understand, as parse_compress_specification() is now
called once for all the format, with or without user-specified
compression methods. One comment was also confusing for the non-zlib
case, so remove it while on it.
This code has been introduced in 5e73a60 when adding support for
compression specifications in pg_dump.
Per discussion with Justin Pryzby and Georgios Kokolatos.
Discussion: https://postgr.es/m/20230225050214.GH1653@telsasoft.com
Commit ce6b672e44 changed dumping GRANT commands to ensure that
grantors already have an ADMIN OPTION on the role for which it
is granting permissions. Looping over the grants per role has a
stop condition on dumping the grant statements, but accidentally
missed updating the variable for the conditional check.
Author: Andreas Scherbaum <ads@pgug.de>
Co-authored-by: Artur Zakirov <zaartur@gmail.com>
Discussion: https://postgr.es/m/de44299d-cd31-b41f-2c2a-161fa5e586a5@pgug.de
This fixes many spelling mistakes in comments, but a few references to
invalid parameter names, function names and option names too in comments
and also some in string constants
Also, fix an #undef that was undefining the incorrect definition
Author: Alexander Lakhin
Reviewed-by: Justin Pryzby
Discussion: https://postgr.es/m/d5f68d19-c0fc-91a9-118d-7c6a5a3f5fad@gmail.com
Make sure that function declarations use names that exactly match the
corresponding names from function definitions in a few places. These
inconsistencies were all introduced relatively recently, after the code
base had parameter name mismatches fixed in bulk (see commits starting
with commits 4274dc22 and 035ce1fe).
pg_bsd_indent still has a couple of similar inconsistencies, which I
(pgeoghegan) have left untouched for now.
Like all earlier commits that cleaned up function parameter names, this
commit was written with help from clang-tidy.
This reverts commit e056c557ae and minor later fixes thereof.
There's a few problems in this new feature -- most notably regarding
pg_upgrade behavior, but others as well. This new feature is not in any
way critical on its own, so instead of scrambling to fix it we revert it
and try again in early 17 with these issues in mind.
Discussion: https://postgr.es/m/3801207.1681057430@sss.pgh.pa.us
We now create pg_constaint rows for NOT NULL constraints with
contype='n'.
We propagate these constraints during operations such as adding
inheritance relationships, creating and attaching partitions, creating
tables LIKE other tables. We mostly follow the well-known rules of
conislocal and coninhcount that we have for CHECK constraints, with some
adaptations; for example, as opposed to CHECK constraints, we don't
match NOT NULL ones by name when descending a hierarchy to alter it;
instead we match by column number. This means we don't require the
constraint names to be identical across a hierarchy.
For now, we omit them from system catalogs. Maybe this is worth
reconsidering. We don't support NOT VALID nor DEFERRABLE clauses
either; these can be added as separate features later (this patch is
already large and complicated enough.)
This has been very long in the making. The first patch was written by
Bernd Helmle in 2010 to add a new pg_constraint.contype value ('n'),
which I (Álvaro) then hijacked in 2011 and 2012, until that one was
killed by the realization that we ought to use contype='c' instead:
manufactured CHECK constraints. However, later SQL standard
development, as well as nonobvious emergent properties of that design
(mostly, failure to distinguish them from "normal" CHECK constraints as
well as the performance implication of having to test the CHECK
expression) led us to reconsider this choice, so now the current
implementation uses contype='n' again.
In 2016 Vitaly Burovoy also worked on this feature[1] but found no
consensus for his proposed approach, which was claimed to be closer to
the letter of the standard, requiring additional pg_attribute columns to
track the OID of the NOT NULL constraint for that column.
[1] https://postgr.es/m/CAKOSWNkN6HSyatuys8xZxzRCR-KL1OkHS5-b9qd9bf1Rad3PLA@mail.gmail.com
Author: Álvaro Herrera <alvherre@alvh.no-ip.org>
Author: Bernd Helmle <mailings@oopsware.de>
Reviewed-by: Justin Pryzby <pryzby@telsasoft.com>
Reviewed-by: Peter Eisentraut <peter.eisentraut@enterprisedb.com>
Discussion: https://postgr.es/m/CACA0E642A0267EDA387AF2B%40%5B172.26.14.62%5D
Discussion: https://postgr.es/m/AANLkTinLXMOEMz+0J29tf1POokKi4XDkWJ6-DDR9BKgU@mail.gmail.com
Discussion: https://postgr.es/m/20110707213401.GA27098@alvh.no-ip.org
Discussion: https://postgr.es/m/1343682669-sup-2532@alvh.no-ip.org
Discussion: https://postgr.es/m/CAKOSWNkN6HSyatuys8xZxzRCR-KL1OkHS5-b9qd9bf1Rad3PLA@mail.gmail.com
Discussion: https://postgr.es/m/20220817181249.q7qvj3okywctra3c@alvherre.pgsql
zstd compression supports a special mode for finding matched in distant
past, which may result in better compression ratio, at the expense of
using more memory (the window size is 128MB).
To enable this optional mode, use the "long" keyword when specifying the
compression method (--compress=zstd:long).
Author: Justin Pryzby
Reviewed-by: Tomas Vondra, Jacob Champion
Discussion: https://postgr.es/m/20230224191840.GD1653@telsasoft.com
Discussion: https://postgr.es/m/20220327205020.GM28503@telsasoft.com
Allow pg_dump to use the zstd compression, in addition to gzip/lz4. Bulk
of the new compression method is implemented in compress_zstd.{c,h},
covering the pg_dump compression APIs. The rest of the patch adds test
and makes various places aware of the new compression method.
The zstd library (which this patch relies on) supports multithreaded
compression since version 1.5. We however disallow that feature for now,
as it might interfere with parallel backups on platforms that rely on
threads (e.g. Windows). This can be improved / relaxed in the future.
This also fixes a minor issue in InitDiscoverCompressFileHandle(), which
was not updated to check if the file already has the .lz4 extension.
Adding zstd compression was originally proposed in 2020 (see the second
thread), but then was reworked to use the new compression API introduced
in e9960732a9. I've considered both threads when compiling the list of
reviewers.
Author: Justin Pryzby
Reviewed-by: Tomas Vondra, Jacob Champion, Andreas Karlsson
Discussion: https://postgr.es/m/20230224191840.GD1653@telsasoft.com
Discussion: https://postgr.es/m/20201221194924.GI30237@telsasoft.com
Convert to BCP47 language tags before storing in the catalog, except
during binary upgrade or when the locale comes from an existing
collation or template database.
The resulting language tags can vary slightly between ICU
versions. For instance, "@colBackwards=yes" is converted to
"und-u-kb-true" in older versions of ICU, and to the simpler (but
equivalent) "und-u-kb" in newer versions.
The process of canonicalizing to a language tag also understands more
input locale string formats than ucol_open(). For instance,
"fr_CA.UTF-8" is misinterpreted by ucol_open() and the region is
ignored; effectively treating it the same as the locale "fr" and
opening the wrong collator. Canonicalization properly interprets the
language and region, resulting in the language tag "fr-CA", which can
then be understood by ucol_open().
This commit fixes a problem in prior versions due to ucol_open()
misinterpreting locale strings as described above. For instance,
creating an ICU collation with locale "fr_CA.UTF-8" would store that
string directly in the catalog, which would later be passed to (and
misinterpreted by) ucol_open(). After this commit, the locale string
will be canonicalized to language tag "fr-CA" in the catalog, which
will be properly understood by ucol_open(). Because this fix affects
the resulting collator, we cannot change the locale string stored in
the catalog for existing databases or collations; otherwise we'd risk
corrupting indexes. Therefore, only canonicalize locales for
newly-created (not upgraded) collations/databases. For similar
reasons, do not backport.
Discussion: https://postgr.es/m/8c7af6820aed94dc7bc259d2aa7f9663518e6137.camel@j-davis.com
Reviewed-by: Peter Eisentraut
After 0da243fed0 got committed, it was reported that in some cases the
compression ratio is rather poor - particularly for custom format with
narrow tables - due to writing the LZ4 header/footer for each row.
This commit switches to LZ4F (LZ4 frame format), eliminating most of the
overhead and greatly improving the compression ratio. This makes the
compressed size about the same for plain and custom formats (just like
for gzip, for example).
LZ4F is now used by both compression APIs, which allowed refactoring and
reusing more of the code. For consistency this also renames the LZ4File
struct to LZ4State, and a number of functions are now prefixed with
LZ4Stream_ (instead of LZ4File_).
Patch by Georgios Kokolatos, based on report and initial patch by Justin
Pryzby. Review and minor cleanups by me.
Author: Georgios Kokolatos, Justin Pryzby
Reported-by: Justin Pryzby
Reviewed-by: Tomas Vondra
Discussion: https://postgr.es/m/20230227044910.GO1653%40telsasoft.com
This role can be granted to non-superusers to allow them to issue
CREATE SUBSCRIPTION. The non-superuser must additionally have CREATE
permissions on the database in which the subscription is to be
created.
Most forms of ALTER SUBSCRIPTION, including ALTER SUBSCRIPTION .. SKIP,
now require only that the role performing the operation own the
subscription, or inherit the privileges of the owner. However, to
use ALTER SUBSCRIPTION ... RENAME or ALTER SUBSCRIPTION ... OWNER TO,
you also need CREATE permission on the database. This is similar to
what we do for schemas. To change the owner of a schema, you must also
have permission to SET ROLE to the new owner, similar to what we do
for other object types.
Non-superusers are required to specify a password for authentication
and the remote side must use the password, similar to what is required
for postgres_fdw and dblink. A superuser who wants a non-superuser to
own a subscription that does not rely on password authentication may
set the new password_required=false property on that subscription. A
non-superuser may not set password_required=false and may not modify a
subscription that already has password_required=false.
This new password_required subscription property works much like the
eponymous postgres_fdw property. In both cases, the actual semantics
are that a password is not required if either (1) the property is set
to false or (2) the relevant user is the superuser.
Patch by me, reviewed by Andres Freund, Jeff Davis, Mark Dilger,
and Stephen Frost (but some of those people did not fully endorse
all of the decisions that the patch makes).
Discussion: http://postgr.es/m/CA+TgmoaDH=0Xj7OBiQnsHTKcF2c4L+=gzPBUKSJLh8zed2_+Dg@mail.gmail.com
The pg_dump Compressor API has three basic callbacks - Allocate, Write
and End. The gzip implementation (since e9960732a) wrongly assumed the
Write function would always be called, and deferred the initialization
of the internal compression system until the first such call. But when
there's no data to compress (e.g. for empty LO), this would result in
not finalizing the compression state (because it was not actually
initialized), producing invalid dump.
Fixed by initializing the internal compression system in the Allocate
call, whenever the caller provides the Write. For decompression the
state is not needed, so we leave the private_data member unpopulated.
Introduces a pg_dump TAP test compressing an empty large object.
This also rearranges the functions to their original order, to make
diffs against older code simpler to understand. Finally, replace an
unreachable pg_fatal() with a simple assert check.
Reported-by: Justin Pryzby
Author: Justin Pryzby, Georgios Kokolatos
Reviewed-by: Georgios Kokolatos, Tomas Vondra
https://postgr.es/m/20230228235834.GC30529%40telsasoft.com
Prior to the introduction of the compression API in e9960732a9, pg_dump
would use the ZLIB_IN_SIZE/ZLIB_OUT_SIZE to size input/output buffers.
Commit 0da243fed0 introduced similar constants for LZ4, but while gzip
defined both buffers to be 4kB, LZ4 used 4kB and 16kB without any clear
reasoning why that's desirable.
Furthermore, parts of the code unaware of which compression is used
(e.g. pg_backup_directory.c) continued to use ZLIB_OUT_SIZE directly.
Simplify by replacing the various constants with DEFAULT_IO_BUFFER_SIZE,
set to 4kB. The compression implementations still have an option to use
a custom value, but considering 4kB was fine for 20+ years, I find that
unlikely (and we'd probably just increase the default buffer size).
Author: Georgios Kokolatos
Reviewed-by: Tomas Vondra, Justin Pryzby
Discussion: https://postgr.es/m/33496f7c-3449-1426-d568-63f6bca2ac1f@gmail.com
After 0da243fed0 got committed, we've received a report about a compiler
warning, related to the new LZ4File_gets() function:
compress_lz4.c: In function 'LZ4File_gets':
compress_lz4.c:492:19: warning: comparison of unsigned expression in
'< 0' is always false [-Wtype-limits]
492 | if (dsize < 0)
The reason is very simple - dsize is declared as size_t, which is an
unsigned integer, and thus the check is pointless and we might fail to
notice an error in some cases (or fail in a strange way a bit later).
The warning could have been silenced by simply changing the type, but we
realized the API mostly assumes all the libraries use the same types and
report errors the same way (e.g. by returning 0 and/or negative value).
But we can't make this assumption - the gzip/lz4 libraries already
disagree on some of this, and even if they did a library added in the
future might not.
The right solution is to define what the API does, and translate the
library-specific behavior in consistent way (so that the internal errors
are not exposed to users of our compression API). So this adjusts the
data types in a couple places, so that we don't miss library errors, and
simplifies and unifies the error reporting to simply return true/false
(instead of e.g. size_t).
While at it, make sure LZ4File_open_write() does not clobber errno in
case open_func() fails.
Author: Georgios Kokolatos
Reported-by: Alexander Lakhin
Reviewed-by: Tomas Vondra, Justin Pryzby
Discussion: https://postgr.es/m/33496f7c-3449-1426-d568-63f6bca2ac1f@gmail.com
Instead of trying to optimize this by skipping creation of the
links for tables we don't plan to dump, just create them all in
bulk with a single scan over the pg_inherits data. The previous
approach was more or less O(N^2) in the number of pg_inherits
entries, not to mention being way too complicated.
Also, don't create useless TableAttachInfo objects.
It's silly to create a TableAttachInfo object that we're not
going to dump, when we know perfectly well at creation time
that it won't be dumped.
Patch by me; thanks to Julien Rouhaud for review.
Discussion: https://postgr.es/m/1376149.1675268279@sss.pgh.pa.us
Hash partitioning on an enum is problematic because the hash codes are
derived from the OIDs assigned to the enum values, which will almost
certainly be different after a dump-and-reload than they were before.
This means that some rows probably end up in different partitions than
before, causing restore to fail because of partition constraint
violations. (pg_upgrade dodges this problem by using hacks to force
the enum values to keep the same OIDs, but that's not possible nor
desirable for pg_dump.)
Users can work around that by specifying --load-via-partition-root,
but since that's a dump-time not restore-time decision, one might
find out the need for it far too late. Instead, teach pg_dump to
apply that option automatically when dealing with a partitioned
table that has hash-on-enum partitioning.
Also deal with a pre-existing issue for --load-via-partition-root
mode: in a parallel restore, we try to TRUNCATE target tables just
before loading them, in order to enable some backend optimizations.
This is bad when using --load-via-partition-root because (a) we're
likely to suffer deadlocks from restore jobs trying to restore rows
into other partitions than they came from, and (b) if we miss getting
a deadlock we might still lose data due to a TRUNCATE removing rows
from some already-completed restore job.
The fix for this is conceptually simple: just don't TRUNCATE if we're
dealing with a --load-via-partition-root case. The tricky bit is for
pg_restore to identify those cases. In dumps using COPY commands we
can inspect each COPY command to see if it targets the nominal target
table or some ancestor. However, in dumps using INSERT commands it's
pretty impractical to examine the INSERTs in advance. To provide a
solution for that going forward, modify pg_dump to mark TABLE DATA
items that are using --load-via-partition-root with a comment.
(This change also responds to a complaint from Robert Haas that
the dump output for --load-via-partition-root is pretty confusing.)
pg_restore checks for the special comment as well as checking the
COPY command if present. This will fail to identify the combination
of --load-via-partition-root and --inserts in pre-existing dump files,
but that should be a pretty rare case in the field. If it does
happen you will probably get a deadlock failure that you can work
around by not using parallel restore, which is the same as before
this bug fix.
Having done this, there seems no remaining reason for the alarmism
in the pg_dump man page about combining --load-via-partition-root
with parallel restore, so remove that warning.
Patch by me; thanks to Julien Rouhaud for review. Back-patch to
v11 where hash partitioning was introduced.
Discussion: https://postgr.es/m/1376149.1675268279@sss.pgh.pa.us
This patch adds new pg_dump switches
--table-and-children=pattern
--exclude-table-and-children=pattern
--exclude-table-data-and-children=pattern
which act the same as the existing --table, --exclude-table, and
--exclude-table-data switches, except that any partitions or
inheritance child tables of the table(s) matching the pattern
are also included or excluded.
Gilles Darold, reviewed by Stéphane Tachoires
Discussion: https://postgr.es/m/5aa393b5-5f67-8447-b83e-544516990ee2@migops.com
396d348b0 omitted adding with_icu to the pg_dump tests under
meson. Conversely, e6927270c exported ZSTD for pg_basebackup's tests, despite
pg_basebackup's ZSTD support not having any tests.
Reported-by: Justin Pryzby <pryzby@telsasoft.com>
Discussion: https://postgr.es/m/20230226225239.GL1653@telsasoft.com
This exposes the ICU facility to add custom collation rules to a
standard collation.
New options are added to CREATE COLLATION, CREATE DATABASE, createdb,
and initdb to set the rules.
Reviewed-by: Laurenz Albe <laurenz.albe@cybertec.at>
Reviewed-by: Daniel Verite <daniel@manitou-mail.org>
Discussion: https://www.postgresql.org/message-id/flat/821c71a4-6ef0-d366-9acf-bb8e367f739f@enterprisedb.com
One file per line seems best. We already did this in some cases.
This adopts the same format everywhere (except in some cases where the
list reasonably fits on one line).
Some deprecated options were not marked as such in usage output. This
does so across the installed binaries in an attempt to provide consistent
markup for this.
Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi>
Discussion: https://postgr.es/m/062C6A8A-A4E8-4F52-9E31-45F0C9E9915E@yesql.se
Commit 0a20ff54f split out the GUC variables from guc.c into a new file
guc_tables.c. This updates comments referencing guc.c regarding variables
which are now in guc_tables.c.
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/6B50C70C-8C1F-4F9A-A7C0-EEAFCC032406@yesql.se
As it stands, flagInhAttrs() can make changes in table properties that
change decisions made at other tables during other iterations of its
loop. This is a pretty bad idea, since we visit the tables in OID
order which is not necessarily related to inheritance relationships.
So far as I can tell, the consequences are just cosmetic: we might
dump DEFAULT or GENERATED expressions that we don't really need to
because they match properties of the parent. Nonetheless, it's buggy,
and somebody might someday add functionality here that fails less
benignly when the traversal order varies.
One issue is that when we decide we needn't dump a particular
GENERATED expression, we physically unlink the struct for it,
so that it will now look like the table has no such expression,
causing the wrong choice to be made at any child visited later.
We can improve that by instead clearing the dobj.dump flag,
and taking care to check that flag when it comes time to dump
the expression or not.
The other problem is that if we decide we need to fake up a DEFAULT
NULL clause to override a default that would otherwise get inherited,
we modify the data structure in the reverse fashion, creating an
attrdefs entry where there hadn't been one. It's harder to avoid
doing that, but since the backend won't report a plain "DEFAULT NULL"
property we can modify the code to recognize ones we just added.
Add some commentary to perhaps forestall future mistakes of the
same ilk.
Since the effects of this seem only cosmetic, no back-patch.
Discussion: https://postgr.es/m/1506298.1676323579@sss.pgh.pa.us
A unique index which is created with non-distinct NULLS cannot be
used for backing a primary key constraint. Make sure to disallow
such table alterations and teach pg_dump to drop the non-distinct
NULLS clause on indexes where this has been set.
Bug: 17720
Reported-by: Reiner Peterke <zedaardv@drizzle.com>
Reviewed-by: Peter Eisentraut <peter.eisentraut@enterprisedb.com>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/17720-dab8ee0fa85d316d@postgresql.org
Expand pg_dump's compression streaming and file APIs to support the lz4
algorithm. The newly added compress_lz4.{c,h} files cover all the
functionality of the aforementioned APIs. Minor changes were necessary
in various pg_backup_* files, where code for the 'lz4' file suffix has
been added, as well as pg_dump's compression option parsing.
Author: Georgios Kokolatos
Reviewed-by: Michael Paquier, Rachel Heaton, Justin Pryzby, Shi Yu, Tomas Vondra
Discussion: https://postgr.es/m/faUNEOpts9vunEaLnmxmG-DldLSg_ql137OC3JYDmgrOMHm1RvvWY2IdBkv_CRxm5spCCb_OmKNk2T03TMm0fBEWveFF9wA1WizPuAgB7Ss%3D%40protonmail.com
Switch pg_dump to use the Compression API, implemented by bf9aa490db.
The CompressFileHandle replaces the cfp* family of functions with a
struct of callbacks for accessing (compressed) files. This allows adding
new compression methods simply by introducing a new struct instance with
appropriate implementation of the callbacks.
Archives compressed using custom compression methods store an identifier
of the compression algorithm in their header instead of the compression
level. The header version is bumped.
Author: Georgios Kokolatos
Reviewed-by: Michael Paquier, Rachel Heaton, Justin Pryzby, Tomas Vondra
Discussion: https://postgr.es/m/faUNEOpts9vunEaLnmxmG-DldLSg_ql137OC3JYDmgrOMHm1RvvWY2IdBkv_CRxm5spCCb_OmKNk2T03TMm0fBEWveFF9wA1WizPuAgB7Ss%3D%40protonmail.com
Commit bf9aa490db introduced a compression API in compress_io.{c,h} to
make reuse easier, and allow adding more compression algorithms.
However, pg_backup_archiver.c was not switched to this API and continued
to call the compression directly.
This commit teaches pg_backup_archiver.c about the compression API, so
that it can benefit from bf9aa490db (simpler code, easier addition of
new compression methods).
Author: Georgios Kokolatos
Reviewed-by: Michael Paquier, Rachel Heaton, Justin Pryzby, Tomas Vondra
Discussion: https://postgr.es/m/faUNEOpts9vunEaLnmxmG-DldLSg_ql137OC3JYDmgrOMHm1RvvWY2IdBkv_CRxm5spCCb_OmKNk2T03TMm0fBEWveFF9wA1WizPuAgB7Ss%3D%40protonmail.com
pg_restore -l has always been able to read the TOC data of a dump even
if its binary has no support for compression, for both compressed and
uncompressed dumps. 5e73a60 has introduced a backward-incompatible
behavior by switching a warning to a hard error in the code path reading
the header data of a dump, preventing the TOC items to be listed even if
pg_restore -l, with no support for compression, is used on a compressed
dump. Most modern systems should have support for zlib, but it can be
also possible that somebody relies on the past behavior when copying
over a dump where binaries are not built with zlib support (most likely
some WIN32 flavors these days, though most environments should provide
that).
There is no easy way to have a regression test for this pattern, as it
requires a mix of dump/restore commands with different compilation
options, with and without compression. One possibility I see here would
be to have a command-line option that enforces a non-compression check
for a build that supports compression, but that does not seem worth the
cost, either.
Reported-by: Justin Pryzby
Author: Georgios Kokolatos
Discussion: https://postgr.es/m/20230125180020.GF22427@telsasoft.com
If the public schema has a non-default owner (perhaps due to
dropping and recreating it) then use of pg_dump's "--if-exists"
option results in a warning message:
warning: could not find where to insert IF EXISTS in statement "-- *not* dropping schema, since initdb creates it"
This is harmless since the dump output is the same either way,
but nonetheless it's undesirable. It's the fault of commit
a7a7be1f2, which created situations where a TOC entry's "defn"
or "dropStmt" fields could be just comments. Although that
commit fixed up the kluges in pg_backup_archiver.c that munge defn
strings, it missed doing so for the one that munges dropStmts.
Per bug# 17753 from Justin Zhang.
Discussion: https://postgr.es/m/17753-9c8773631747ee1c@postgresql.org
The rule system needs "old" and/or "new" pseudo-RTEs in rule actions
that are ON INSERT/UPDATE/DELETE. Historically it's put such entries
into the ON SELECT rules of views as well, but those are really quite
vestigial. The only thing we've used them for is to carry the
view's relid forward to AcquireExecutorLocks (so that we can
re-lock the view to verify it hasn't changed before re-using a plan)
and to carry its relid and permissions data forward to execution-time
permissions checks. What we can do instead of that is to retain
these fields of the RTE_RELATION RTE for the view even after we
convert it to an RTE_SUBQUERY RTE. This requires a tiny amount of
extra complication in the planner and AcquireExecutorLocks, but on
the other hand we can get rid of the logic that moves that data from
one place to another.
The principal immediate benefit of doing this, aside from a small
saving in the pg_rewrite data for views, is that these pseudo-RTEs
no longer trigger ruleutils.c's heuristic about qualifying variable
names when the rangetable's length is more than 1. That results
in quite a number of small simplifications in regression test outputs,
which are all to the good IMO.
Bump catversion because we need to dump a few more fields of
RTE_SUBQUERY RTEs. While those will always be zeroes anyway in
stored rules (because we'd never populate them until query rewrite)
they are useful for debugging, and it seems like we'd better make
sure to transmit such RTEs accurately in plans sent to parallel
workers. I don't think the executor actually examines these fields
after startup, but someday it might.
This is a second attempt at committing 1b4d280ea. The difference
from the first time is that now we can add some filtering rules to
AdjustUpgrade.pm to allow cross-version upgrade testing to pass
despite all the cosmetic changes in CREATE VIEW outputs.
Amit Langote (filtering rules by me)
Discussion: https://postgr.es/m/CA+HiwqEf7gPN4Hn+LoZ4tP2q_Qt7n3vw7-6fJKOf92tSEnX6Gg@mail.gmail.com
Discussion: https://postgr.es/m/891521.1673657296@sss.pgh.pa.us
This reverts commit 1b4d280ea1.
It's broken the buildfarm members that run cross-version-upgrade tests,
because they're not prepared to deal with cosmetic differences between
CREATE VIEW commands emitted by older servers and HEAD. Even if we had
a solution to that, which we don't, it'd take some time to roll it out
to the affected animals. This improvement isn't valuable enough to
justify addressing that problem on an emergency basis, so revert it
for now.
The rule system needs "old" and/or "new" pseudo-RTEs in rule actions
that are ON INSERT/UPDATE/DELETE. Historically it's put such entries
into the ON SELECT rules of views as well, but those are really quite
vestigial. The only thing we've used them for is to carry the
view's relid forward to AcquireExecutorLocks (so that we can
re-lock the view to verify it hasn't changed before re-using a plan)
and to carry its relid and permissions data forward to execution-time
permissions checks. What we can do instead of that is to retain
these fields of the RTE_RELATION RTE for the view even after we
convert it to an RTE_SUBQUERY RTE. This requires a tiny amount of
extra complication in the planner and AcquireExecutorLocks, but on
the other hand we can get rid of the logic that moves that data from
one place to another.
The principal immediate benefit of doing this, aside from a small
saving in the pg_rewrite data for views, is that these pseudo-RTEs
no longer trigger ruleutils.c's heuristic about qualifying variable
names when the rangetable's length is more than 1. That results
in quite a number of small simplifications in regression test outputs,
which are all to the good IMO.
Bump catversion because we need to dump a few more fields of
RTE_SUBQUERY RTEs. While those will always be zeroes anyway in
stored rules (because we'd never populate them until query rewrite)
they are useful for debugging, and it seems like we'd better make
sure to transmit such RTEs accurately in plans sent to parallel
workers. I don't think the executor actually examines these fields
after startup, but someday it might.
Amit Langote
Discussion: https://postgr.es/m/CA+HiwqEf7gPN4Hn+LoZ4tP2q_Qt7n3vw7-6fJKOf92tSEnX6Gg@mail.gmail.com
In both partitioning and traditional inheritance, require child
columns to be GENERATED if and only if their parent(s) are.
Formerly we allowed the case of an inherited column being
GENERATED when its parent isn't, but that results in inconsistent
behavior: the column can be directly updated through an UPDATE
on the parent table, leading to it containing a user-supplied
value that might not match the generation expression. This also
fixes an oversight that we enforced partition-key-columns-can't-
be-GENERATED against parent tables, but not against child tables
that were dynamically attached to them.
Also, remove the restriction that the child's generation expression
be equivalent to the parent's. In the wake of commit 3f7836ff6,
there doesn't seem to be any reason that we need that restriction,
since generation expressions are always computed per-table anyway.
By removing this, we can also allow a child to merge multiple
inheritance parents with inconsistent generation expressions, by
overriding them with its own expression, much as we've long allowed
for DEFAULT expressions.
Since we're rejecting a case that we used to accept, this doesn't
seem like a back-patchable change. Given the lack of field
complaints about the inconsistent behavior, it's likely that no
one is doing this anyway, but we won't change it in minor releases.
Amit Langote and Tom Lane
Discussion: https://postgr.es/m/2793383.1672944799@sss.pgh.pa.us
Currently, for large transactions, the publisher sends the data in
multiple streams (changes divided into chunks depending upon
logical_decoding_work_mem), and then on the subscriber-side, the apply
worker writes the changes into temporary files and once it receives the
commit, it reads from those files and applies the entire transaction. To
improve the performance of such transactions, we can instead allow them to
be applied via parallel workers.
In this approach, we assign a new parallel apply worker (if available) as
soon as the xact's first stream is received and the leader apply worker
will send changes to this new worker via shared memory. The parallel apply
worker will directly apply the change instead of writing it to temporary
files. However, if the leader apply worker times out while attempting to
send a message to the parallel apply worker, it will switch to
"partial serialize" mode - in this mode, the leader serializes all
remaining changes to a file and notifies the parallel apply workers to
read and apply them at the end of the transaction. We use a non-blocking
way to send the messages from the leader apply worker to the parallel
apply to avoid deadlocks. We keep this parallel apply assigned till the
transaction commit is received and also wait for the worker to finish at
commit. This preserves commit ordering and avoid writing to and reading
from files in most cases. We still need to spill if there is no worker
available.
This patch also extends the SUBSCRIPTION 'streaming' parameter so that the
user can control whether to apply the streaming transaction in a parallel
apply worker or spill the change to disk. The user can set the streaming
parameter to 'on/off', or 'parallel'. The parameter value 'parallel' means
the streaming will be applied via a parallel apply worker, if available.
The parameter value 'on' means the streaming transaction will be spilled
to disk. The default value is 'off' (same as current behaviour).
In addition, the patch extends the logical replication STREAM_ABORT
message so that abort_lsn and abort_time can also be sent which can be
used to update the replication origin in parallel apply worker when the
streaming transaction is aborted. Because this message extension is needed
to support parallel streaming, parallel streaming is not supported for
publications on servers < PG16.
Author: Hou Zhijie, Wang wei, Amit Kapila with design inputs from Sawada Masahiko
Reviewed-by: Sawada Masahiko, Peter Smith, Dilip Kumar, Shi yu, Kuroda Hayato, Shveta Mallik
Discussion: https://postgr.es/m/CAA4eK1+wyN6zpaHUkCLorEWNx75MG0xhMwcFhvjqm2KURZEAGw@mail.gmail.com
Combine multiple LOCK TABLE commands to reduce the number of
round trips to the server. This is particularly helpful when
dumping from a remote server, but it seems useful even without
that. In particular, shortening the time from seeing a table
in pg_class to acquiring lock on it reduces the window for
trouble from concurrent DDL.
Aleksander Alekseev, reviewed by Fabrízio de Royes Mello,
Gilles Darold, and Andres Freund
Discussion: https://postgr.es/m/CAJ7c6TO4z1+OBa-R+fC8FnaUgbEWJUf2Kq=nRngTW5EXtKru2g@mail.gmail.com
While on it, newlines are removed from the end of two elog() strings.
The others are simple grammar mistakes. One comment in pg_upgrade
referred incorrectly to sequences since a7e5457.
Author: Justin Pryzby
Discussion: https://postgr.es/m/20221230231257.GI1153@telsasoft.com
Backpatch-through: 11
This commit changes some of the bbstreamer files and pg_dump to use the
same style as a few other places (like common/compression.c), where the
name of the compression method is not part of the string, but an
argument of it. This reduces a bit the translation work with less
string patterns.
Discussion: https://postgr.es/m/Y5/5tdK+4n3clvtU@paquier.xyz
The USER SET flag specifies that the variable should be set on behalf of an
ordinary role. That lets ordinary roles set placeholder variables, which
permission requirements are not known yet. Such a value wouldn't be used if
the variable finally appear to require superuser privileges.
The new flags are stored in the pg_db_role_setting.setuser array. Catversion
is bumped.
This commit is inspired by the previous work by Steve Chavez.
Discussion: https://postgr.es/m/CAPpHfdsLd6E--epnGqXENqLP6dLwuNZrPMcNYb3wJ87WR7UBOQ%40mail.gmail.com
Author: Alexander Korotkov, Steve Chavez
Reviewed-by: Pavel Borisov, Steve Chavez
By default, the contents generated by the custom and directory dump
formats are compressed. However, with the existing test facility, the
restore program will succeed regardless of whether the dumped output was
compressed or not without checking if anything has been compressed.
This commit implements a portable way to check the contents of the
custom and directory dump formats:
- glob_patterns, that can be defined for each test as an array of
glob()-compilable strings, tracking the contents that should or should
not be compressed. While this is useful to make sure that the table
data is compressed, this also checks that blobs.toc and toc.dat are
never compressed.
- command_like, to execute a command on a dump and check its generated
output. This is used here in correlation with pg_restore -l to check if
the dumps have been compressed or not, depending on if the build
supports gzip, or not.
This hole in the tests has come up when working on 5e73a60, where
compression has to be applied by default, if available, for both dump
formats.
The idea of glob_patterns comes from me, and Georgios has come up with
the design for command_like.
Author: Georgios Kokolatos, Michael Paquier
Discussion: https://postgr.es/m/DQn4czCWR1rcbGPLL7p3LfEr5-kGmlySm-H05VgroINdikvhtS5r9EdI6b8D8sjnbKdJ09k-cxs2AqijBeHAWk9Q8gvEAxPRHuLRhwONcGc=@pm.me
For historical reasons, pg_dump refers to large objects as "BLOBs".
This term is not used anywhere else in PostgreSQL, and it also means
something different in the SQL standard and other SQL systems.
This patch renames internal functions, code comments, documentation,
etc. to use the "large object" or "LO" terminology instead. There is
no functionality change, so the archive format still uses the name
"BLOB" for the archive entry. Additional long command-line options
are added with the new naming.
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Discussion: https://www.postgresql.org/message-id/flat/868a381f-4650-9460-1726-1ffd39a270b4%40enterprisedb.com
This is present in the declaration for ReadDataFromArchive, so we'd better
have it in the definition too in order to avoid compilers from complaining
about the mismatch of function signatures.
Compression specifications are currently used by pg_basebackup and
pg_receivewal, and are able to let the user control in an extended way
the method and level of compression used. As an effect of this commit,
pg_dump's -Z/--compress is now able to use more than just an integer, as
of the grammar "method[:detail]".
The method can be either "none" or "gzip", and can optionally take a
detail string. If the detail string is only an integer, it defines the
compression level. A comma-separated list of keywords can also be used
method allows for more options, the only keyword supported now is
"level".
The change is backward-compatible, hence specifying only an integer
leads to no compression for a level of 0 and gzip compression when the
level is greater than 0.
Most of the code changes are straight-forward, as pg_dump was relying on
an integer tracking the compression level to check for gzip or no
compression. These are changed to use a compression specification and
the algorithm stored in it.
As of this change, note that the dump format is not bumped because there
is no need yet to track the compression algorithm in the TOC entries.
Hence, we still rely on the compression level to make the difference
when reading them. This will be mandatory once a new compression method
is added, though.
In order to keep the code simpler when parsing the compression
specification, the code is changed so as pg_dump now fails hard when
using gzip on -Z/--compress without its support compiled, rather than
enforcing no compression without the user knowing about it except
through a warning. Like before this commit, archive and custom formats
are compressed by default when the code is compiled with gzip, and left
uncompressed without gzip.
Author: Georgios Kokolatos
Reviewed-by: Michael Paquier
Discussion: https://postgr.es/m/O4mutIrCES8ZhlXJiMvzsivT7ztAMja2lkdL1LJx6O5f22I2W8PBIeLKz7mDLwxHoibcnRAYJXm1pH4tyUNC4a8eDzLn22a6Pb1S74Niexg=@pm.me
Currently a table can only be vacuumed or analyzed by its owner or
a superuser. This can now be extended to any user by means of an
appropriate GRANT.
Nathan Bossart
Reviewed by: Bharath Rupireddy, Kyotaro Horiguchi, Stephen Frost, Robert
Haas, Mark Dilger, Tom Lane, Corey Huinker, David G. Johnston, Michael
Paquier.
Discussion: https://postgr.es/m/20220722203735.GB3996698@nathanxps13
Similar to how the INHERIT option controls whether or not the
permissions of the granted role are automatically available to the
grantee, the new SET permission controls whether or not the grantee
may use the SET ROLE command to assume the privileges of the granted
role.
In addition, the new SET permission controls whether or not it
is possible to transfer ownership of objects to the target role
or to create new objects owned by the target role using commands
such as CREATE DATABASE .. OWNER. We could alternatively have made
this controlled by the INHERIT option, or allow it when either
option is given. An advantage of this approach is that if you
are granted a predefined role with INHERIT TRUE, SET FALSE, you
can't go and create objects owned by that role.
The underlying theory here is that the ability to create objects
as a target role is not a privilege per se, and thus does not
depend on whether you inherit the target role's privileges. However,
it's surely something you could do anyway if you could SET ROLE
to the target role, and thus making it contingent on whether you
have that ability is reasonable.
Design review by Nathan Bossat, Wolfgang Walther, Jeff Davis,
Peter Eisentraut, and Stephen Frost.
Discussion: http://postgr.es/m/CA+Tgmob+zDSRS6JXYrgq0NWdzCXuTNzT5eK54Dn2hhgt17nm8A@mail.gmail.com
Avoid having to list all the possible object types twice. Instead,
only _getObjectDescription() needs to know about specific object
types. It communicates back to _printTocEntry() whether an owner is
to be set.
In passing, remove the logic to use ALTER TABLE to set the owner of
views and sequences. This is no longer necessary. Furthermore, if
pg_dump doesn't recognize the object type, this is now a fatal error,
not a warning.
Reviewed-by: Corey Huinker <corey.huinker@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/0a00f923-599a-381b-923f-0d802a727715@enterprisedb.com
When the pg_dump 002_pg_dump.pl test generates the command to load the
schema, it does
# Add terminating semicolon
$create_sql{$test_db} .= $tests{$test}->{create_sql} . ";";
In some cases, this creates a duplicate semicolon, but more
importantly, this doesn't add any newline. So if you look at the
result in either the server log or in
tmp_check/log/regress_log_002_pg_dump, it looks like a complete mess.
This patch makes the output look cleaner for manual inspection: add
semicolon only if necessary, and add two newlines.
Discussion: https://www.postgresql.org/message-id/flat/d6aec95a-8729-43cc-2578-f2a5e46640e0%40enterprisedb.com
This substantially speeds up building for windows, due to the vast amount of
headers included via windows.h. A cross build from linux targetting mingw goes
from
994.11user 136.43system 0:31.58elapsed 3579%CPU
to
422.41user 89.05system 0:14.35elapsed 3562%CPU
The wins on windows are similar-ish (but I don't have a system at hand just
now for actual numbers). Targetting other operating systems the wins are far
smaller (tested linux, macOS, FreeBSD).
For now precompiled headers are disabled by default, it's not clear how well
they work on all platforms. E.g. on FreeBSD gcc doesn't seem to have working
support, but clang does.
When doing a full build precompiled headers are only beneficial for targets
with multiple .c files, as meson builds a separate precompiled header for each
target (so that different compilation options take effect). This commit
therefore only changes target with at least two .c files to use precompiled
headers.
Because this commit adds b_pch=false to the default_options new build
directories will have precompiled headers disabled by default, however
existing build directories will continue use the default value of b_pch, which
is true.
Note that using precompiled headers with ccache requires setting
CCACHE_SLOPPINESS=pch_defines,time_macros to get hits.
Reviewed-by: Peter Eisentraut <peter.eisentraut@enterprisedb.com>
Reviewed-by: Justin Pryzby <pryzby@telsasoft.com>
Discussion: https://postgr.es/m/CA+hUKG+50eOUbN++ocDc0Qnp9Pvmou23DSXu=ZA6fepOcftKqA@mail.gmail.com
Discussion: https://postgr.es/m/c5736f70-bb6d-8d25-e35c-e3d886e4e905@enterprisedb.com
Discussion: https://postgr.es/m/20190826054000.GE7005%40paquier.xyz
The generated resource files aren't exactly the same ones as the old
buildsystems generate. Previously "InternalName" and "OriginalFileName" were
mostly wrong / not set (despite being required), but that was hard to fix in
at least the make build. Additionally, the meson build falls back to a
"auto-generated" description when not set, and doesn't set it in a few cases -
unlikely that anybody looks at these descriptions in detail.
Author: Andres Freund <andres@anarazel.de>
Author: Nazir Bilal Yavuz <byavuz81@gmail.com>
Reviewed-by: Peter Eisentraut <peter.eisentraut@enterprisedb.com>
There are still some alignment-related failures in the buildfarm,
which might or might not be able to be fixed quickly, but I've also
just realized that it increased the size of many WAL records by 4 bytes
because a block reference contains a RelFileLocator. The effect of that
hasn't been studied or discussed, so revert for now.
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
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
Nathan Bossart
Peter Eisentraut
Alvaro Herrera
Jeff Davis
Michael Paquier
Robert Haas
Andres Freund
Tom Lane
Alexander Korotkov
Tomas Vondra
Daniel Gustafsson
David Rowley
Peter Geoghegan
John Naylor
Amit Kapila
Bruce Momjian
Andrew Dunstan