This reverts commit b0a55f4, to remove for now the TAP test that did the
equivalent of check_guc. The test has been using pg_config --sharedir
to find the location of postgresql.conf.sample. While the buildfarm and
normal build environments rather liked that, this proves to be an issue
for Debian where pg_config is patched to not be relocatable, causing the
test to fail.
Rather than relying on pg_config, we'd better find the sample file based
on its location from the source directory. However, this is also an
issue as a TAP test only offers the build directory as of TESTDIR in the
environment context, so this would fail with VPATH builds. Perhaps the
source path could be provided additionally when running the TAP tests.
Or perhaps we may be able to get away by just switching to a SQL
approach, by using PG_ABS_SRCDIR but this is going to require some extra
loops to get the sample file from the correct path in src/backend/. In
any case, this needs more thoughts, so just revert the test case until
something better is done about this relocation problem.
Reported-by: Christopher Berg
Discussion: https://postgr.es/m/YgYw25OXV5men8Fj@msg.df7cb.de
Redefine a scanned page as any heap page that actually gets pinned by
VACUUM's first pass over the heap, regardless of whether or not the page
was cleanup locked. Although it's fundamentally impossible to prune a
heap page without a cleanup lock (since we cannot safely defragment the
page), we can do just about everything else. The only notable further
exception is freezing tuples, though even that is arguably a consequence
of not being able to prune (not a separate issue).
VACUUM now does as much of the same processing as possible for pages
that could not be cleanup locked. Any failure to do specific required
processing is treated as a special case exception, which will be rare in
practice. We now collect any preexisting LP_DEAD items (left behind by
earlier opportunistic pruning) in the dead_items array for these heap
pages, and count their tuples in the usual way. Steps used to decide if
we'll attempt relation truncation are performed in the usual way for
no-cleanup-lock scanned pages, too.
Although eliminating these special cases is intrinsically useful, it's
even more useful as an enabler of further simplifications. The only
essential difference between aggressive and non-aggressive is that only
aggressive is _guaranteed_ to be able to advance relfrozenxid up to
FreezeLimit. Advancing relfrozenxid is always useful, but before now
non-aggressive VACUUMs threw away the opportunity to do so whenever a
cleanup lock could not be acquired on any page, no matter what the
details were. This was very pessimistic.
It isn't actually necessary to "behave aggressively" to maintain the
ability to advance relfrozenxid when a cleanup lock isn't immediately
available (most of the time). The non-aggressive case will now make
sure that it isn't safe to advance relfrozenxid (without waiting) using
only a share lock. It will usually notice that there are no tuples that
need to be frozen anyway, just like in the aggressive case -- and so it
no longer wastes an opportunity to advance relfrozenxid over nothing.
(The non-aggressive case still won't wait for a cleanup lock when there
really are tuples on the page that need to be frozen, since that really
would amount to "behaving aggressively".)
VACUUM currently has a tendency to set heap pages to all-visible in the
visibility map before it freezes all of the tuples on the page. Only a
subsequent aggressive VACUUM will visit these pages to freeze their
tuples, usually only when the tuple XIDs are much older than the
vacuum_freeze_min_age GUC (FreezeLimit cutoff) is supposed to allow.
And so non-aggressive VACUUMs are still far less likely to be able to
advance relfrozenxid in practice, even with the enhancements from this
commit. This remaining issue will be addressed by future work that
overhauls the criteria for freezing tuples. Once that's in place,
almost every VACUUM operation will be able to advance relfrozenxid in
practice.
Author: Peter Geoghegan <pg@bowt.ie>
Reviewed-By: Andres Freund <andres@anarazel.de>
Reviewed-By: Masahiko Sawada <sawada.mshk@gmail.com>
Discussion: https://postgr.es/m/CAH2-Wznp=c=Opj8Z7RMR3G=ec3_JfGYMN_YvmCEjoPCHzWbx0g@mail.gmail.com
createplan.c tries to save a runtime projection step by specifying
a scan plan node's output as being exactly the table's columns, or
index's columns in the case of an index-only scan, if there is not a
reason to do otherwise. This logic did not previously pay attention
to whether an index's columns are returnable. That worked, sort of
accidentally, until commit 9a3ddeb51 taught setrefs.c to reject plans
that try to read a non-returnable column. I have no desire to loosen
setrefs.c's new check, so instead adjust use_physical_tlist() to not
try to optimize this way when there are non-returnable column(s).
Per report from Ryan Kelly. Like the previous patch, back-patch
to all supported branches.
Discussion: https://postgr.es/m/CAHUie24ddN+pDNw7fkhNrjrwAX=fXXfGZZEHhRuofV_N_ftaSg@mail.gmail.com
Rather than doing manual book keeping to plan the number of tests to run
in each TAP suite, conclude each run with done_testing() summing up the
the number of tests that ran. This removes the need for maintaning and
updating the plan count at the expense of an accurate count of remaining
during the test suite runtime.
This patch has been discussed a number of times, often in the context of
other patches which updates tests, so a larger number of discussions can
be found in the archives.
Reviewed-by: Julien Rouhaud <rjuju123@gmail.com>
Reviewed-by: Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Reviewed-by: Kyotaro Horiguchi <horikyota.ntt@gmail.com>
Discussion: https://postgr.es/m/DD399313-3D56-4666-8079-88949DAC870F@yesql.se
The connection strings in the SSL client tests were using the host
set up from Cluster.pm which is a temporary pathname. When SNI is
enabled we pass the host to OpenSSL in order to set the server name
indication ClientHello extension via SSL_set_tlsext_host_name.
OpenSSL doesn't validate the hostname apart from checking the max
length, but LibreSSL checks for RFC 5890 conformance which results
in errors during testing as the pathname from Cluster.pm is not a
valid hostname.
Fix by setting the host explicitly to localhost, as that's closer
to the intent of the test.
Backpatch through 14 where SNI support came in.
Reported-by: Nazir Bilal Yavuz <byavuz81@gmail.com>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/17391-304f81bcf724b58b@postgresql.org
Backpatch-through: 14
Some pre-2017 Test::More versions need perfect $Test::Builder::Level
maintenance to find the variable. Buildfarm member snapper reported an
overall failure that the file intended to hide via the TODO construct.
That trouble was reachable in v11 and v10. For later branches, this
serves as defense in depth. Back-patch to v10 (all supported versions).
Discussion: https://postgr.es/m/20220202055556.GB2745933@rfd.leadboat.com
src/backend/utils/misc/check_guc is a script that cross-checks the
consistency of the GUCs with postgresql.conf.sample, making sure that
its format is in line with what guc.c has. It has never been run
automatically, and has rotten over the years, creating a lot of false
positives as per a report from Justin Pryzby.
d10e41d has introduced a SQL function to publish the most relevant flags
associated to a GUC, with tests added in the main regression test suite
to make sure that we avoid most of the inconsistencies in the GUC
settings, based on recent reports, but there was nothing able to
cross-check postgresql.conf.sample with the contents of guc.c.
This commit adds a TAP test that covers the remaining gap. It emulates
the most relevant checks that check_guc does, so as any format mistakes
are detected in postgresql.conf.sample at development stage, with the
following checks:
- Check that parameters marked as NOT_IN_SAMPLE are not in the sample
file.
- Check that there are no dead entries in postgresql.conf.sample for
parameters not marked as NOT_IN_SAMPLE.
- Check that no parameters are missing from the sample file if listed in
guc.c without NOT_IN_SAMPLE.
The idea of building a list of the GUCs by parsing the sample file comes
from Justin, and he wrote the regex used in the patch to find all the
GUCs (this same formatting rule basically applies for the last 20~ years
or so). In order to test this patch, I have played with manual
modifications of postgresql.conf.sample and guc.c, making sure that we
detect problems with the GUC rules and the sample file format.
The test is located in src/test/modules/test_misc, which is the best
location I could think about for such sanity checks.
Reviewed-by: Justin Pryzby
Discussion: https://postgr.es/m/Yf9YGSwPiMu0c7fP@paquier.xyz
Rename create_function_0 to create_function_c, and create_function_3
to create_function_sql, to establish their charters more clearly.
This should also reduce confusion versus our underscore-digit
convention for naming variant expected-files.
I separated this from the previous commit on the premise that keeping
the renaming distinct might make "git blame" tracking easier.
Discussion: https://postgr.es/m/1114748.1640383217@sss.pgh.pa.us
The idea behind this patch is to make it possible to run individual
test scripts without running the entire core test suite. Making all
the scripts completely independent would involve a massive rewrite,
and would probably be worse for coverage of things like concurrent DDL.
So this patch just does what seems practical with limited changes.
The net effect is that any test script can be run after running
limited earlier dependencies:
* all scripts depend on test_setup
* many scripts depend on create_index
* other dependencies are few in number, and are documented in
the parallel_schedule file.
To accomplish this, I chose a small number of commonly-used tables
and moved their creation and filling into test_setup. Later scripts
are expected not to modify these tables' data contents, for fear of
affecting other scripts' results. Also, our former habit of declaring
all C functions in one place is now gone in favor of declaring them
where they're used, if that's just one script, or in test_setup if
necessary.
There's more that could be done to remove some of the remaining
inter-script dependencies, but significantly more-invasive changes
would be needed, and at least for now it doesn't seem worth it.
Discussion: https://postgr.es/m/1114748.1640383217@sss.pgh.pa.us
The SQL standard has been ambiguous about whether null values in
unique constraints should be considered equal or not. Different
implementations have different behaviors. In the SQL:202x draft, this
has been formalized by making this implementation-defined and adding
an option on unique constraint definitions UNIQUE [ NULLS [NOT]
DISTINCT ] to choose a behavior explicitly.
This patch adds this option to PostgreSQL. The default behavior
remains UNIQUE NULLS DISTINCT. Making this happen in the btree code
is pretty easy; most of the patch is just to carry the flag around to
all the places that need it.
The CREATE UNIQUE INDEX syntax extension is not from the standard,
it's my own invention.
I named all the internal flags, catalog columns, etc. in the negative
("nulls not distinct") so that the default PostgreSQL behavior is the
default if the flag is false.
Reviewed-by: Maxim Orlov <orlovmg@gmail.com>
Reviewed-by: Pavel Borisov <pashkin.elfe@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/84e5ee1b-387e-9a54-c326-9082674bde78@enterprisedb.com
To avoid "ERROR: canceling statement due to conflict with recovery",
as seen on a couple of slower build farm animals, crank
max_standby_streaming_delay right up.
In passing, adjust a configuration option that accidentally used a
non-standard format (not a problem, but needlessly inconsistent).
Reviewed-by: Andres Freund <andres@anarazel.de>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/CA%2BhUKGK65xVqNgsSPyrr2LEwtfUN%3DGfEuQ868hTC-mu0bFG42A%40mail.gmail.com
Teach canonicalize_path() how to strip all unnecessary uses of "."
and "..", replacing the previous ad-hoc code that got rid of only
some such cases. In particular, we can always remove all such
uses from absolute paths.
The proximate reason to do this is that Windows rejects paths
involving ".." in some cases (in particular, you can't put one in a
symlink), so we ought to be sure we don't use ".." unnecessarily.
Moreover, it seems like good cleanup on general principles.
There is other path-munging code that could be simplified now, but
we'll leave that for followup work.
It is tempting to call this a bug fix and back-patch it. On the other
hand, the misbehavior can only be reached if a highly privileged user
does something dubious, so it's not unreasonable to say "so don't do
that". And this patch could result in unexpected behavioral changes,
in case anybody was expecting uses of ".." to stay put. So at least
for now, just put it in HEAD.
Shenhao Wang, editorialized a bit by me
Discussion: https://postgr.es/m/OSBPR01MB4214FA221FFE046F11F2AD74F2D49@OSBPR01MB4214.jpnprd01.prod.outlook.com
The most meaningful flags are shown, which are the ones useful for the
user and for automating and extending the set of tests supported
currently by check_guc.
This script may actually be removed in the future, but we are not
completely sure yet if and how we want to support the remaining sanity
checks performed there, that are now integrated in the main regression
test suite as of this commit.
Thanks also to Peter Eisentraut and Kyotaro Horiguchi for the
discussion.
Bump catalog version.
Author: Justin Pryzby
Discussion: https://postgr.es/m/20211129030833.GJ17618@telsasoft.com
Although select_common_type() has a failure-return convention, an
apparent successful return just provides a type OID that *might* work
as a common supertype; we've not validated that the required casts
actually exist. In the mainstream use-cases that doesn't matter,
because we'll proceed to invoke coerce_to_common_type() on each input,
which will fail appropriately if the proposed common type doesn't
actually work. However, a few callers didn't read the (nonexistent)
fine print, and thought that if they got back a nonzero OID then the
coercions were sure to work.
This affects in particular the recently-added "anycompatible"
polymorphic types; we might think that a function/operator using
such types matches cases it really doesn't. A likely end result
of that is unexpected "ambiguous operator" errors, as for example
in bug #17387 from James Inform. Another, much older, case is that
the parser might try to transform an "x IN (list)" construct to
a ScalarArrayOpExpr even when the list elements don't actually have
a common supertype.
It doesn't seem desirable to add more checking to select_common_type
itself, as that'd just slow down the mainstream use-cases. Instead,
write a separate function verify_common_type that performs the
missing checks, and add a call to that where necessary. Likewise add
verify_common_type_from_oids to go with select_common_type_from_oids.
Back-patch to v13 where the "anycompatible" types came in. (The
symptom complained of in bug #17387 doesn't appear till v14, but
that's just because we didn't get around to converting || to use
anycompatible till then.) In principle the "x IN (list)" fix could
go back all the way, but I'm not currently convinced that it makes
much difference in real-world cases, so I won't bother for now.
Discussion: https://postgr.es/m/17387-5dfe54b988444963@postgresql.org
The invocation of pg_regress in 027_stream_regress.pl didn't specify the
host. It ends up working on most systems because of connection
defaults. However, on windows it makes the test very slow unless
PG_TEST_USE_UNIX_SOCKETS is used.
The problem is that windows resolves "localhost" to ::0, 127.0.0.1, the server
started only listens on 127.0.0.1. On windows refused TCP connections are
internally retried a few times, with back-off between tries, taking at least 2
seconds.
Noticed while investigating a complaint about the test's slow speed by Andrew
Dunstan.
Discussion: https://postgr.es/m/20220127220351.kyp3bdaukfytmoqx@alap3.anarazel.de
Perl instances on some msys toolchains (e.g. UCRT64) have their
configured osname set to 'MSWin32' rather than 'msys'. The test for
the msys2 platform is adjusted accordingly.
Backpatch to release 14.
This fixes a set of issues that have accumulated over the past months
(or years) in various code areas. Most fixes are related to some recent
additions, as of the development of v15.
Author: Justin Pryzby
Discussion: https://postgr.es/m/20220124030001.GQ23027@telsasoft.com
Previously, unless we had to add a NOT NULL constraint to the column,
this command resulted in updating only the index's relcache entry.
That's problematic when replication behavior is being driven off the
existence of a primary key: other sessions (and ours too for that
matter) failed to recalculate their opinion of whether the table can
be replicated. Add a relcache invalidation to fix it.
This has been broken since pg_class.relhaspkey was removed in v11.
Before that, updating the table's relhaspkey value sufficed to cause
a cache flush. Hence, backpatch to v11.
Report and patch by Hou Zhijie
Discussion: https://postgr.es/m/OS0PR01MB5716EBE01F112C62F8F9B786947B9@OS0PR01MB5716.jpnprd01.prod.outlook.com
Commits 6c4a8903b et al. had a couple of deficiencies:
* The logic I added to Cluster::start to see if a PID file is present
could be fooled by a stale PID file left over from a previous
postmaster. To fix, if we're not sure whether we expect to find a
running postmaster or not, validate the PID using "kill 0".
* 017_shm.pl has a loop in which it just issues repeated Cluster::start
calls; this will fail if some invocation fails but leaves self->_pid
set. Per buildfarm results, the above fix is not enough to make this
safe: we might have "validated" a PID for a postmaster that exits
immediately after we look. Hence, match each failed start call with
a stop call that will get us back to the self->_pid == undef state.
Add a fail_ok option to Cluster::stop to make this work.
Discussion: https://postgr.es/m/CA+hUKGKV6fOHvfiPt8=dOKzvswjAyLoFoJF1iQXMNpi7+hD1JQ@mail.gmail.com
Since the test requires reproducible behavior from VACUUM, and since
DISABLE_PAGE_SKIPPING doesn't actually disable all forms of page
skipping, let's use a temporary table to avoid contention.
Back-patch to 12, like commit 3414099c.
Discussion: https://postgr.es/m/20220120052404.sonrhq3f3qgplpzj%40alap3.anarazel.de
"pg_ctl start" might start a new postmaster and then return failure
anyway, for example if PGCTLTIMEOUT is exceeded. If there is a
postmaster there, it's still incumbent on us to shut it down at
script end, so check for the PID file even though we are about
to fail.
This has been broken all along, so back-patch to all supported branches.
Discussion: https://postgr.es/m/647439.1642622744@sss.pgh.pa.us
In adverse circumstances, the fsync calls cause this test to run for
quite a long time (multiple minutes) and even suffer timeout failures.
This seems to date from before we made an effort to disable fsync in
all our test cases; there's not a lot of point in using it if there's
not a plan to force an O/S crash during the test.
Discussion: https://postgr.es/m/440239.1642560607@sss.pgh.pa.us
Where we test vacuum_truncate's effects, sometimes this is failing to
truncate as expected on the build farm. That could be explained by page
skipping, so disable it explicitly, with the theory that commit fe246d1c
didn't go far enough.
Back-patch to 12, where the vacuum_truncate tests were added.
Discussion: https://postgr.es/m/CA%2BhUKGLT2UL5_JhmBzUgkdyKfc%3D5J-gJSQJLysMs4rqLUKLAzw%40mail.gmail.com
The tests added by 14d755b000 added a
test case for psql's \set ECHO errors. After the test, it then reset
this to \set ECHO none, which is the default. But the regression
tests are actually run under \set ECHO all (psql -a), so that would
have been the correct way to restore the previous state. Otherwise,
test cases added after that point would not have their input lines
displayed. This was never the intention, so fix this now.
The original coding (from c33869cc3) failed with "more than one row
returned by a subquery used as an expression" if there were unrelated
triggers of the same tgname on parent partitioned tables. (That's
possible because statement-level triggers don't get inherited.) Fix
by applying LIMIT 1 after sorting the candidates by inheritance level.
Also, wrap the subquery in a CASE so that we don't have to execute it at
all when the trigger is visibly non-inherited. Aside from saving some
cycles, this avoids the need for a confusing and undocumented NULLIF().
While here, tweak the format of the emitted query to look a bit
nicer for "psql -E", and add some explanation of this subquery,
because it badly needs it.
Report and patch by Justin Pryzby (with some editing by me).
Back-patch to v13 where the faulty code came in.
Discussion: https://postgr.es/m/20211217154356.GJ17618@telsasoft.com
Currently, database OIDs, relfilenodes, and tablespace OIDs can all
change when a cluster is upgraded using pg_upgrade. It seems better
to preserve them, because (1) it makes troubleshooting pg_upgrade
easier, since you don't have to do a lot of work to match up files
in the old and new clusters, (2) it allows 'rsync' to save bandwidth
when used to re-sync a cluster after an upgrade, and (3) if we ever
encrypt or sign blocks, we would likely want to use a nonce that
depends on these values.
This patch only arranges to preserve relfilenodes and tablespace
OIDs. The task of preserving database OIDs is left for another patch,
since it involves some complexities that don't exist in these cases.
Database OIDs have a similar issue, but there are some tricky points
in that case that do not apply to these cases, so that problem is left
for another patch.
Shruthi KC, based on an earlier patch from Antonin Houska, reviewed
and with some adjustments by me.
Discussion: http://postgr.es/m/CA+TgmoYgTwYcUmB=e8+hRHOFA0kkS6Kde85+UNdon6q7bt1niQ@mail.gmail.com
Before, SQL-level boolean constants were represented by a string with
a cast, and internal Boolean values in DDL commands were usually
represented by Integer nodes. This takes the place of both of these
uses, making the intent clearer and having some amount of type safety.
Reviewed-by: Pavel Stehule <pavel.stehule@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/8c1a2e37-c68d-703c-5a83-7a6077f4f997@enterprisedb.com
The need for this was foreseen long ago, but when record_eq
actually became hashable (in commit 01e658fa7), we missed updating
this spot.
Per bug #17363 from Elvis Pranskevichus. Back-patch to v14 where
the faulty commit came in.
Discussion: https://postgr.es/m/17363-f6d42fd0d726be02@postgresql.org
By default, wait_for_catchup() waits for the replication connection
to reach the primary's write LSN. That's fine, but in an apparent
attempt to save one query round-trip, it was coded so that we
executed pg_current_wal_lsn() again during each probe query.
Thus, we presented the standby with a moving target to be reached.
(While the test script itself couldn't be causing the write LSN
to advance while it's blocked in wait_for_catchup(), it's plenty
plausible that background activity such as autovacuum is emitting
more WAL.) That could make the test take longer than necessary,
and potentially it could mask bugs by allowing the standby to process
more WAL than a strict interpretation of the test scenario allows.
So, change wait_for_catchup() to do it "by the book", explicitly
collecting the write LSN to wait for at the outset.
Also, various call sites were instructing wait_for_catchup() to
wait for the standby to reach the primary's insert LSN rather than
its write LSN. This also seems like a bad idea. While in most
test scenarios those are the same, if they are different then the
inserted-but-not-yet-written WAL is not presently available to the
standby. The test isn't doing anything to make it become so, so
again we have the potential for unwanted test delay, perhaps even
a test timeout. (Again, background activity would be needed to
make this more than a hypothetical problem.) Hence, change the
callers where necessary so that the wait target is always the
primary's write LSN.
While at it, simplify callers by making use of wait_for_catchup's
default arguments wherever possible (the preceding change makes
this possible in more places than it was before). And rewrite
wait_for_catchup's documentation a bit.
Patch by me; thanks to Julien Rouhaud for review.
Discussion: https://postgr.es/m/2368336.1641843098@sss.pgh.pa.us
Add pg_statistic_ext_data.stxdinherit flag, so that for each extended
statistics definition we can store two versions of data - one for the
relation alone, one for the whole inheritance tree. This is analogous to
pg_statistic.stainherit, but we failed to include such flag in catalogs
for extended statistics, and we had to work around it (see commits
859b3003de, 36c4bc6e72 and 20b9fa308e).
This changes the relationship between the two catalogs storing extended
statistics objects (pg_statistic_ext and pg_statistic_ext_data). Until
now, there was a simple 1:1 mapping - for each definition there was one
pg_statistic_ext_data row, and this row was inserted while creating the
statistics (and then updated during ANALYZE). With the stxdinherit flag,
we don't know how many rows there will be (child relations may be added
after the statistics object is defined), so there may be up to two rows.
We could make CREATE STATISTICS to always create both rows, but that
seems wasteful - without partitioning we only need stxdinherit=false
rows, and declaratively partitioned tables need only stxdinherit=true.
So we no longer initialize pg_statistic_ext_data in CREATE STATISTICS,
and instead make that a responsibility of ANALYZE. Which is what we do
for regular statistics too.
Patch by me, with extensive improvements and fixes by Justin Pryzby.
Author: Tomas Vondra, Justin Pryzby
Reviewed-by: Tomas Vondra, Justin Pryzby
Discussion: https://postgr.es/m/20210923212624.GI831%40telsasoft.com
Since this test schedule is not run by default, it's next door to
unused. Moreover, its test coverage is very thin, and what there is
is just about entirely superseded by the src/test/recovery tests.
Let's drop it instead of carrying obsolete tests.
Discussion: https://postgr.es/m/3911012.1641246643@sss.pgh.pa.us
AFAICS we had no coverage of this point except in the seldom-used,
slated-for-removal standby_schedule test suite. Sequence updates
are enough different from regular table updates that it seems worth
covering them explicitly in src/test/recovery.
Discussion: https://postgr.es/m/999497.1641431891@sss.pgh.pa.us
Commit 859b3003de disabled building of extended stats for inheritance
trees, to prevent updating the same catalog row twice. While that
resolved the issue, it also means there are no extended stats for
declaratively partitioned tables, because there are no data in the
non-leaf relations.
That also means declaratively partitioned tables were not affected by
the issue 859b3003de addressed, which means this is a regression
affecting queries that calculate estimates for the whole inheritance
tree as a whole (which includes e.g. GROUP BY queries).
But because partitioned tables are empty, we can invert the condition
and build statistics only for the case with inheritance, without losing
anything. And we can consider them when calculating estimates.
It may be necessary to run ANALYZE on partitioned tables, to collect
proper statistics. For declarative partitioning there should no prior
statistics, and it might take time before autoanalyze is triggered. For
tables partitioned by inheritance the statistics may include data from
child relations (if built 859b3003de), contradicting the current code.
Report and patch by Justin Pryzby, minor fixes and cleanup by me.
Backpatch all the way back to PostgreSQL 10, where extended statistics
were introduced (same as 859b3003de).
Author: Justin Pryzby
Reported-by: Justin Pryzby
Backpatch-through: 10
Discussion: https://postgr.es/m/20210923212624.GI831%40telsasoft.com
Since commit 859b3003de we only build extended statistics for individual
relations, ignoring the child relations. This resolved the issue with
updating catalog tuple twice, but we still tried to use the statistics
when calculating estimates for the whole inheritance tree. When the
relations contain very distinct data, it may produce bogus estimates.
This is roughly the same issue 427c6b5b9 addressed ~15 years ago, and we
fix it the same way - by ignoring extended statistics when calculating
estimates for the inheritance tree as a whole. We still consider
extended statistics when calculating estimates for individual child
relations, of course.
This may result in plan changes due to different estimates, but if the
old statistics were not describing the inheritance tree particularly
well it's quite likely the new plans is actually better.
Report and patch by Justin Pryzby, minor fixes and cleanup by me.
Backpatch all the way back to PostgreSQL 10, where extended statistics
were introduced (same as 859b3003de).
Author: Justin Pryzby
Reported-by: Justin Pryzby
Backpatch-through: 10
Discussion: https://postgr.es/m/20210923212624.GI831%40telsasoft.com
Add a new TAP test under src/test/recovery to run the standard
regression tests while a streaming replica replays the WAL. This
provides a basic workout for WAL decoding and redo code, and compares
the replicated result.
Optionally, enable (expensive) wal_consistency_checking if listed in
the env variable PG_TEST_EXTRA.
Reviewed-by: 綱川 貴之 (Takayuki Tsunakawa) <tsunakawa.takay@fujitsu.com>
Reviewed-by: Andres Freund <andres@anarazel.de>
Reviewed-by: Andrew Dunstan <andrew@dunslane.net>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: Anastasia Lubennikova <lubennikovaav@gmail.com>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://postgr.es/m/CA%2BhUKGKpRWQ9SxdxxDmTBCJoR0YnFpMBe7kyzY8SUQk%2BHeskxg%40mail.gmail.com
The tablespace tests in the main regression tests have been changed to
use "in-place" tablespaces, so that they work when streamed to a replica
on the same host. Add a new TAP test that exercises tablespaces with
absolute paths, for coverage.
Reviewed-by: Andres Freund <andres@anarazel.de>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://postgr.es/m/CA%2BhUKGKpRWQ9SxdxxDmTBCJoR0YnFpMBe7kyzY8SUQk%2BHeskxg%40mail.gmail.com
Remove the machinery from pg_regress that manages the testtablespace
directory. Instead, use "in-place" tablespaces, because they work
correctly when there is a streaming replica running on the same host.
Reviewed-by: Andres Freund <andres@anarazel.de>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://postgr.es/m/CA%2BhUKGKpRWQ9SxdxxDmTBCJoR0YnFpMBe7kyzY8SUQk%2BHeskxg%40mail.gmail.com
Commit 7745bc352 intended to ensure that whole-row Vars would be
printed with "::type" decoration in all contexts where plain
"var.*" notation would result in star-expansion, notably in
ROW() and VALUES() constructs. However, it missed the case of
INSERT with a single-row VALUES, as reported by Timur Khanjanov.
Nosing around ruleutils.c, I found a second oversight: the
code for RowCompareExpr generates ROW() notation without benefit
of an actual RowExpr, and naturally it wasn't in sync :-(.
(The code for FieldStore also does this, but we don't expect that
to generate strictly parsable SQL anyway, so I left it alone.)
Back-patch to all supported branches.
Discussion: https://postgr.es/m/efaba6f9-4190-56be-8ff2-7a1674f9194f@intrans.baku.az
When building append paths, we've been looking only at startup and total
costs for the paths. When building fractional paths that may eliminate
the cheapest one, because it may be dominated by two separate paths (one
for startup, one for total cost).
This extends generate_orderedappend_paths() to also consider which paths
have lowest fractional cost. Currently we only consider paths matching
pathkeys - in the future this may be improved by also considering paths
that are only partially sorted, with an incremental sort on top.
Original report of an issue by Arne Roland, patch by me (based on a
suggestion by Tom Lane).
Reviewed-by: Arne Roland, Zhihong Yu
Discussion: https://postgr.es/m/e8f9ec90-546d-e948-acce-0525f3e92773%40enterprisedb.com
Discussion: https://postgr.es/m/1581042da8044e71ada2d6e3a51bf7bb%40index.de
Previously pg_log_backend_memory_contexts() could request to
log the memory contexts of backends, but not of auxiliary processes
such as checkpointer. This commit enhances the function so that
it can also send the request to auxiliary processes. It's useful to
look at the memory contexts of those processes for debugging purpose
and better understanding of the memory usage pattern of them.
Note that pg_log_backend_memory_contexts() cannot send the request
to logger or statistics collector. Because this logging request
mechanism is based on shared memory but those processes aren't
connected to that.
Author: Bharath Rupireddy
Reviewed-by: Vignesh C, Kyotaro Horiguchi, Fujii Masao
Discussion: https://postgr.es/m/CALj2ACU1nBzpacOK2q=a65S_4+Oaz_rLTsU1Ri0gf7YUmnmhfQ@mail.gmail.com
Try to disable ASLR when building in EXEC_BACKEND mode, to avoid random
memory mapping failures while testing. For developer use only, no
effect on regular builds.
Suggested-by: Andres Freund <andres@anarazel.de>
Tested-by: Bossart, Nathan <bossartn@amazon.com>
Discussion: https://postgr.es/m/20210806032944.m4tz7j2w47mant26%40alap3.anarazel.de
Prevent logical replication workers from performing insert, update,
delete, truncate, or copy commands on tables unless the subscription
owner has permission to do so.
Prevent subscription owners from circumventing row-level security by
forbidding replication into tables with row-level security policies
which the subscription owner is subject to, without regard to whether
the policy would ordinarily allow the INSERT, UPDATE, DELETE or
TRUNCATE which is being replicated. This seems sufficient for now, as
superusers, roles with bypassrls, and target table owners should still
be able to replicate despite RLS policies. We can revisit the
question of applying row-level security policies on a per-row basis if
this restriction proves too severe in practice.
Author: Mark Dilger
Reviewed-by: Jeff Davis, Andrew Dunstan, Ronan Dunklau
Discussion: https://postgr.es/m/9DFC88D3-1300-4DE8-ACBC-4CEF84399A53%40enterprisedb.com
We disallow altering a column datatype within a regular table,
if the table's rowtype is used as a column type elsewhere,
because we lack code to go around and rewrite the other tables.
This restriction should apply to partitioned tables as well, but it
was not checked because ATRewriteTables and ATPrepAlterColumnType
were not on the same page about who should do it for which relkinds.
Per bug #17351 from Alexander Lakhin. Back-patch to all supported
branches.
Discussion: https://postgr.es/m/17351-6db1870f3f4f612a@postgresql.org
The ACL is printed when you add + to the command, similarly to
various other psql backslash commands.
Along the way, move the code for this into describe.c,
where it is a better fit (and can share some code).
Pavel Luzanov, reviewed by Georgios Kokolatos
Discussion: https://postgr.es/m/6d722115-6297-bc53-bb7f-5f150e765299@postgrespro.ru
The code-coverage report says that this test doesn't increase
coverage by one single line, which I now realize is because
I made src/test/modules/test_regex/sql/test_regex_utf8.sql
to cover all the code that this would. So really it's pointless
and we should just drop it.
Up to now this has just sat there as a test you could invoke via
EXTRA_TESTS, which of course nobody does. I'm feeling encouraged
because c2e8bd275 hasn't yet broke anything, so let's try making this
run with a suitable guard condition (similar to collate.linux.utf8).
While user-defined triggers defined on a partitioned table have
a catalog definition for both it and its partitions, internal
triggers used by foreign keys defined on partitioned tables only
have a catalog definition for its partitions. This commit fixes
that so that partitioned tables get the foreign key triggers too,
just like user-defined triggers. Moreover, like user-defined
triggers, partitions' internal triggers will now also have their
tgparentid set appropriately. This is to allow subsequent commit(s)
to make the foreign key related events to be fired in some cases
using the parent table triggers instead of those of partitions'.
This also changes what tgisinternal means in some cases. Currently,
it means either that the trigger is an internal implementation object
of a foreign key constraint, or a "child" trigger on a partition
cloned from the trigger on the parent. This commit changes it to
only mean the former to avoid confusion. As for the latter, it can
be told by tgparentid being nonzero, which is now true both for user-
defined and foreign key's internal triggers.
Author: Amit Langote <amitlangote09@gmail.com>
Reviewed-by: Masahiko Sawada <sawada.mshk@gmail.com>
Reviewed-by: Arne Roland <A.Roland@index.de>
Discussion: https://postgr.es/m/CA+HiwqG7LQSK+n8Bki8tWv7piHD=PnZro2y6ysU2-28JS6cfgQ@mail.gmail.com
Commit 4ace45677 failed to fix the problem fully, because the
same issue of attempting to fetch a non-returnable index column
can occur when rechecking the indexqual after using a lossy index
operator. Moreover, it broke EXPLAIN for such indexquals (which
indicates a gap in our test cases :-().
Revert the code changes of 4ace45677 in favor of adding a new field
to struct IndexOnlyScan, containing a version of the indexqual that
can be executed against the index-returned tuple without using any
non-returnable columns. (The restrictions imposed by check_index_only
guarantee this is possible, although we may have to recompute indexed
expressions.) Support construction of that during setrefs.c
processing by marking IndexOnlyScan.indextlist entries as resjunk
if they can't be returned, rather than removing them entirely.
(We could alternatively require setrefs.c to look up the IndexOptInfo
again, but abusing resjunk this way seems like a reasonably safe way
to avoid needing to do that.)
This solution isn't great from an API-stability standpoint: if there
are any extensions out there that build IndexOnlyScan structs directly,
they'll be broken in the next minor releases. However, only a very
invasive extension would be likely to do such a thing. There's no
change in the Path representation, so typical planner extensions
shouldn't have a problem.
As before, back-patch to all supported branches.
Discussion: https://postgr.es/m/3179992.1641150853@sss.pgh.pa.us
Discussion: https://postgr.es/m/17350-b5bdcf476e5badbb@postgresql.org
Adjust the error texts used for unrecognized/unsupported datetime
units so that there are just two strings to translate, not two
per datatype. Along the way, follow our usual error message style
of not double-quoting type names, and instead making sure that we
say the name is a type. Fix a couple of places in date.c that
were using the wrong one of "unrecognized" and "unsupported".
Nikhil Benesch, with a bit more editing by me
Discussion: https://postgr.es/m/CAPWqQZTURGixmbMH2_Z3ZtWGA0ANjUb9bwtkkxSxSfDeFHuM6Q@mail.gmail.com
If an index has both returnable and non-returnable columns, and one of
the non-returnable columns is an expression using a Var that is in a
returnable column, then a query returning that expression could result
in an index-only scan plan that attempts to read the non-returnable
column, instead of recomputing the expression from the returnable
column as intended.
To fix, redefine the "indextlist" list of an IndexOnlyScan plan node
as containing null Consts in place of any non-returnable columns.
This solves the problem by preventing setrefs.c from falsely matching
to such entries. The executor is happy since it only cares about the
exposed types of the entries, and ruleutils.c doesn't care because a
correct plan won't reference those entries. I considered some other
ways to prevent setrefs.c from doing the wrong thing, but this way
seems good since (a) it allows a very localized fix, (b) it makes
the indextlist structure more compact in many cases, and (c) the
indextlist is now a more faithful representation of what the index AM
will actually produce, viz. nulls for any non-returnable columns.
This is easier to hit since we introduced included columns, but it's
possible to construct failing examples without that, as per the
added regression test. Hence, back-patch to all supported branches.
Per bug #17350 from Louis Jachiet.
Discussion: https://postgr.es/m/17350-b5bdcf476e5badbb@postgresql.org
The reverted commit attempted to fix SQL specification compliance for
the cases which 6aaaa76bb left. This however broke existing behavior
which takes precedence over spec compliance so revert. The introduced
tests are left after the revert since the codepath isn't well covered.
Per bug report 17346. Backpatch down to 14 where it was introduced.
Reported-by: Andrew Bille <andrewbille@gmail.com>
Discussion: https://postgr.es/m/17346-f72b28bd1a341060@postgresql.org
This seems like a clearer name for what it does now.
Provide a compatibility macro so that extensions don't have to convert
to the new name right away.
Discussion: https://postgr.es/m/116024.1640111629@sss.pgh.pa.us
Commit 75d22069e made SET print a warning if you tried to set an
unrecognized parameter within namespace previously reserved by an
extension. It seems better for that to be an outright error though,
for the same reason that we don't let you set unrecognized unqualified
parameter names. In any case, the preceding implementation was
inefficient and erroneous. Perform the check in a more appropriate
spot, and be more careful about prefix-match cases.
Discussion: https://postgr.es/m/116024.1640111629@sss.pgh.pa.us
Extensions that define any custom GUCs should call
EmitWarningsOnPlaceholders after doing so, to help catch misspellings.
Many of our contrib modules hadn't gotten the memo on that, though.
Also add such calls to src/test/modules extensions that have GUCs.
While these aren't really user-facing, they should illustrate good
practice not faulty practice.
Shinya Kato
Discussion: https://postgr.es/m/524fa2c0a34f34b68fbfa90d0760d515@oss.nttdata.com
"git mv" all the input/*.source and output/*.source files into
the corresponding sql/ and expected/ directories. Then remove
the pg_regress and Makefile infrastructure associated with
dynamic translation.
Discussion: https://postgr.es/m/1655733.1639871614@sss.pgh.pa.us
pg_regress has long had provisions for dynamically substituting path
names into regression test scripts and result files, but use of that
feature has always been a serious pain in the neck, mainly because
updating the result files requires tedious manual editing. Let's
get rid of that in favor of passing down the paths in environment
variables.
In addition to being easier to maintain, this way is capable of
dealing with path names that require escaping at runtime, for example
paths containing single-quote marks. (There are other stumbling
blocks in the way of actually building in a path that looks like
that, but removing this one seems like a good thing to do.) The key
coding rule that makes that possible is to concatenate pieces of a
dynamically-variable string using psql's \set command, and then use
the :'variable' notation to quote and escape the string for the next
level of interpretation.
In hopes of making this change more transparent to "git blame",
I've split it into two steps. This commit adds the necessary
pg_regress.c support and changes all the *.source files in-place
so that they no longer require any dynamic translation. The next
commit will just "git mv" them into the regular sql/ and expected/
directories.
Discussion: https://postgr.es/m/1655733.1639871614@sss.pgh.pa.us
\getenv fetches the value of an environment variable into a psql
variable. This is the inverse of the \setenv command that was added
over ten years ago. We'd not seen a compelling use-case for \getenv
at the time, but upcoming regression test refactoring provides a
sufficient reason to add it now.
Discussion: https://postgr.es/m/1655733.1639871614@sss.pgh.pa.us
Our previous validator used a traditional algorithm that performed
comparison and branching one byte at a time. It's useful in that
we always know exactly how many bytes we have validated, but that
precision comes at a cost. Input validation can show up prominently
in profiles of COPY FROM, and future improvements to COPY FROM such
as parallelism or faster line parsing will put more pressure on input
validation. Hence, add fast paths for both ASCII and multibyte UTF-8:
Use bitwise operations to check 16 bytes at a time for ASCII. If
that fails, use a "shift-based" DFA on those bytes to handle the
general case, including multibyte. These paths are relatively free
of branches and thus robust against all kinds of byte patterns. With
these algorithms, UTF-8 validation is several times faster, depending
on platform and the input byte distribution.
The previous coding in pg_utf8_verifystr() is retained for short
strings and for when the fast path returns an error.
Review, performance testing, and additional hacking by: Heikki
Linakangas, Vladimir Sitnikov, Amit Khandekar, Thomas Munro, and
Greg Stark
Discussion:
https://www.postgresql.org/message-id/CAFBsxsEV_SzH%2BOLyCiyon%3DiwggSyMh_eF6A3LU2tiWf3Cy2ZQg%40mail.gmail.com
In the wake of commit b073c3ccd, it's necessary to grant create
permissions on the public schema to PUBLIC to get many of the
core regression test scripts to pass. That commit did so via the
quick-n-dirty expedient of adding the GRANT to the tablespace test,
which runs first. This is problematic for single-machine
replication testing, though. The least painful way to run the
regression tests on such a setup is to skip the tablespace test,
and that no longer works.
To fix, let's invent a separate "test_setup" script to run first,
and put the GRANT there. Revert b073c3ccd's changes to
the tablespace.source files.
In the future it might be good to try to reduce coupling between
the various test scripts by having test_setup create widely-used
objects, with the goal that most of the scripts could run after
having run only test_setup. That's going to take some effort,
so this commit just addresses my immediate pain point.
Discussion: https://postgr.es/m/1363170.1639763559@sss.pgh.pa.us
Fix the code changed by commit 5c056b0c2 so that we always generate
RelabelType, not something else, for a cast to unspecified typmod.
Otherwise planner optimizations might not happen.
It appears we missed this point because the previous experiments were
done on type numeric: the parser undesirably generates a call on the
numeric() length-coercion function, but then numeric_support()
optimizes that down to a RelabelType, so that everything seems fine.
It misbehaves for types that have a non-optimized length coercion
function, such as bpchar.
Per report from John Naylor. Back-patch to all supported branches,
as the previous patch eventually was. Unfortunately, that no longer
includes 9.6 ... we really shouldn't put this type of change into a
nearly-EOL branch.
Discussion: https://postgr.es/m/CAFBsxsEfbFHEkouc+FSj+3K1sHipLPbEC67L0SAe-9-da8QtYg@mail.gmail.com
Nobody has filled in these stubs for upwards of twenty years,
so it's time to drop the idea that they might get implemented
any day now. The associated pg_operator and pg_proc entries
are just confusing wastes of space.
Per complaint from Anton Voloshin.
Discussion: https://postgr.es/m/3426566.1638832718@sss.pgh.pa.us
geo_ops.c contains half a dozen functions that are just stubs throwing
ERRCODE_FEATURE_NOT_SUPPORTED. Since it's been like that for more
than twenty years, there's clearly not a lot of interest in filling in
the stubs. However, I'm uncomfortable with deleting poly_distance(),
since every other geometric type supports a distance-to-another-object-
of-the-same-type function. We can easily add this capability by
cribbing from poly_overlap() and path_distance().
It's possible that the (existing) test case for this will show some
numeric instability, but hopefully the buildfarm will expose it if so.
In passing, improve the documentation to try to explain why polygons
are distinct from closed paths in the first place.
Discussion: https://postgr.es/m/3426566.1638832718@sss.pgh.pa.us
When writing / debugging an isolation test it sometimes is useful to see which
session holds what lock etc. To make it easier, both as part of spec files and
interactively, append the session name to application_name. Since b1907d688
application_name already contains the test name, this appends the session's
name to that.
insert-conflict-specconflict did something like this manually, which can now
be removed.
As we have done lately with other test infrastructure improvements, backpatch
this change, to make it easier to backpatch tests.
Author: Andres Freund <andres@anarazel.de>
Reviewed-By: Michael Paquier <michael@paquier.xyz>
Reviewed-By: Andrew Dunstan <andrew@dunslane.net>
Discussion: https://postgr.es/m/20211211012052.2blmzcmxnxqawd2z@alap3.anarazel.de
Backpatch: 10-, to make backpatching of tests easier.
We need to replace windows-style \ path separators with / when putting socket
directories either in postgresql.conf or libpq connection strings, otherwise
they are interpreted as escapes.
Author: Andres Freund <andres@anarazel.de>
Reviewed-By: Peter Eisentraut <peter.eisentraut@enterprisedb.com>
Discussion: https://postgr.es/m/4da250a5-4222-1522-f14d-8a72bcf7e38e@enterprisedb.com
The multirange_get_range() function fails when two boundaries of the same
range have different alignments. Fix that by adding proper pointer alignment.
Reported-by: Alexander Lakhin
Discussion: https://postgr.es/m/17300-dced2d01ddeb1f2f%40postgresql.org
Backpatch-through: 14
The test added by 5753d4ee32 relies on statistics collector, and so it
may occasionally fail when the UDP packet gets lost. Some machines may
be susceptible to this, probably depending on load etc.
Move the test to stats.sql, which is known to already have this issue
and people know to ignore it.
Reported-by: Justin Pryzby
Discussion: https://postgr.es/m/CAFp7QwpMRGcDAQumN7onN9HjrJ3u4X3ZRXdGFT0K5G2JWvnbWg%40mail.gmail.com
We publish the child table's data twice for a publication that has both
child and parent tables and is published with publish_via_partition_root
as true. This happens because subscribers will initiate synchronization
using both parent and child tables, since it gets both as separate tables
in the initial table list.
Ensure that pg_publication_tables returns only parent tables in such
cases.
Author: Hou Zhijie
Reviewed-by: Greg Nancarrow, Amit Langote, Vignesh C, Amit Kapila
Backpatch-through: 13
Discussion: https://postgr.es/m/OS0PR01MB57167F45D481F78CDC5986F794B99@OS0PR01MB5716.jpnprd01.prod.outlook.com
Extend the foreign key ON DELETE actions SET NULL and SET DEFAULT by
allowing the specification of a column list, like
CREATE TABLE posts (
...
FOREIGN KEY (tenant_id, author_id) REFERENCES users ON DELETE SET NULL (author_id)
);
If a column list is specified, only those columns are set to
null/default, instead of all the columns in the foreign-key
constraint.
This is useful for multitenant or sharded schemas, where the tenant or
shard ID is included in the primary key of all tables but shouldn't be
set to null.
Author: Paul Martinez <paulmtz@google.com>
Discussion: https://www.postgresql.org/message-id/flat/CACqFVBZQyMYJV=njbSMxf+rbDHpx=W=B7AEaMKn8dWn9OZJY7w@mail.gmail.com
We show duplicate values for child tables in publications that have both
child and parent tables and are published with publish_via_partition_root
as false which is not what the user would expect.
We decided not to backpatch this as there is no user complaint about this
and it doesn't seem to be a critical issue.
Author: Hou Zhijie
Reviewed-by: Bharath Rupireddy, Amit Langote, Amit Kapila
Discussion: https://postgr.es/m/OS0PR01MB5716E97F00732B52DC2BBC2594989@OS0PR01MB5716.jpnprd01.prod.outlook.com
This simplifies the code so as it is not necessary anymore for the
caller of parse_subscription_options() to zero SubOpts, holding a
bitmaps of the provided options as well as the default/parsed option
values. This also simplifies some checks related to the options
supported by a command when checking for incompatibilities.
While on it, the errors generated for unsupported combinations with
"slot_name = NONE" are reordered. This may generate a different errors
compared to the previous major versions, but users have to go through
all those errors to get a correct command in this case when using
incorrect values for options "enabled" and "create\slot", so at the end
the resulting command would remain the same.
Author: Peter Smith
Reviewed-by: Nathan Bossart
Discussion: https://postgr.es/m/CAHut+PtXHfLgLHDDJ8ZN5f5Be_37mJoxpEsRg8LNmm4XCr06Rw@mail.gmail.com
REINDEX CONCURRENTLY run on a toast index or a toast relation could
corrupt the target indexes rebuilt, as a backend running in parallel
that manipulates toast values would directly release the lock on the
toast relation when its local operation is done, rather than releasing
the lock once the transaction that manipulated the toast values
committed.
The fix done here is simple: we now hold a ROW EXCLUSIVE lock on the
toast relation when saving or deleting a toast value until the
transaction working on them is committed, so as a concurrent reindex
happening in parallel would be able to wait for any activity and see any
new rows inserted (or deleted).
An isolation test is added to check after the case fixed here, which is
a bit fancy by design as it relies on allow_system_table_mods to rename
the toast table and its index to fixed names. This way, it is possible
to reindex them directly without any dependency on the OID of the
underlying relation. Note that this could not use a DO block either, as
REINDEX CONCURRENTLY cannot be run in a transaction block. The test is
backpatched down to 13, where it is possible, thanks to c4a7a39, to use
allow_system_table_mods in a test suite.
Reported-by: Alexey Ermakov
Analyzed-by: Andres Freund, Noah Misch
Author: Michael Paquier
Reviewed-by: Nathan Bossart
Discussion: https://postgr.es/m/17268-d2fb426e0895abd4@postgresql.org
Backpatch-through: 12
Perl's hex() function complains if its argument contains trailing white
space (or in fact anything other than hex digits), so remove the
offending text.
The temporary path generated in commit c113d8ad5 cannot be passed as-is in
the connection string on Windows since the path delimiting backslashes will
be treated as escape characters. Fix by converting backslash to slash as in
similar path usecases in other tests.
Reported-by: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/20211202195130.e7pprpsx4ell22sp@alap3.anarazel.de
psql's lexer has historically deleted dash-dash (single-line) comments
from what's collected and sent to the server. This is inconsistent
with what it does for slash-star comments, and people have complained
before that they wish such comments would be captured in the server log.
Undoing the decision completely seems like too big a behavioral change,
however. In particular, comments on lines preceding the start of a
query are generally not thought of as being part of that query.
What we can do to improve the situation is to capture comments that
are clearly *within* a query, that is after the first non-whitespace,
non-comment token but before the query's ending semicolon or backslash
command. This is a nearly trivial code change, and it affects only a
few regression test results.
(It is tempting to try to apply the same rule to slash-star comments.
But it's hard to see how to do that without getting strange history
behavior for comments that cross lines, especially if the user then
starts a new query on the same line as the star-slash. In view of
the lack of complaints, let's leave that case alone.)
Discussion: https://postgr.es/m/CAJcOf-cAdMVr7azeYR7nWKsNp7qhORzc84rV6d7m7knG5Hrtsw@mail.gmail.com
An extension can already de facto reserve a GUC prefix using
EmitWarningsOnPlaceholders(). But this was only checked against
settings that exist at the time the extension is loaded (or the
extension chooses to call this). No diagnostic is given when a SET
command later uses a nonexisting setting with a custom prefix.
With this change, EmitWarningsOnPlaceholders() saves the prefixes it
reserves in a list, and SET checks when it finds a "placeholder"
setting whether it belongs to a reserved prefix and issues a warning
in that case.
Add a regression test that checks the patch using the "plpgsql"
registered prefix.
Author: Florin Irion <florin.irion@enterprisedb.com>
Discussion: https://www.postgresql.org/message-id/flat/CA+HEvJDhWuuTpGTJT9Tgbdzm4QS4EzPAwDBScWK18H2Q=FVJFw@mail.gmail.com
Commit c113d8ad50 moved the copying of certificates into a temporary path
for the duration of the tests, instead of using the source tree. This broke
the tests on msys as the absolute path wasn't adapted for the msys platform.
Ensure to convert the path with perl2host before copying and passing in the
connection string.
While there also make certificate copying error handling uniform across all
the test suites.
Discussion: https://postgr.es/m/YacT3tm97xziSUFw@paquier.xyz
The tests didn't considered that an error unrelated to apply changes, e.g.
"replication origin with OID %d is already active ...", could occur on the
table sync worker before starting to copy changes.
To make the test robust we instead need to check the expected error and
the source of error which will be either tablesync or apply worker.
In passing remove the harmless option "streaming = off" from Create
Subscription command as that is anyway the default.
Per buildfarm member sidewinder.
Author: Masahiko Sawada
Reviewed-by: Hou Zhijie, Vignesh C, Amit Kapila
Discussion: https://postgr.es/m/CAD21AoDeScrsHhLyEPYqN3sydg6PxAPVBboK=30xJfUVihNZDA@mail.gmail.com
Discussion: https://postgr.es/m/E1mrtvV-0002Gz-73@gemulon.postgresql.org
When determining whether an index update may be skipped by using HOT, we
can ignore attributes indexed only by BRIN indexes. There are no index
pointers to individual tuples in BRIN, and the page range summary will
be updated anyway as it relies on visibility info.
This also removes rd_indexattr list, and replaces it with rd_attrsvalid
flag. The list was not used anywhere, and a simple flag is sufficient.
Patch by Josef Simanek, various fixes and improvements by me.
Author: Josef Simanek
Reviewed-by: Tomas Vondra, Alvaro Herrera
Discussion: https://postgr.es/m/CAFp7QwpMRGcDAQumN7onN9HjrJ3u4X3ZRXdGFT0K5G2JWvnbWg%40mail.gmail.com
The SSL and SCRAM TAP test suites both use temporary copies of the
supplied test keys in order to ensure correct permissions. These
were however copied inside the tree using temporary filenames rather
than a true temporary folder. Fix by using tmp_check supplied by
PostgreSQL::Test::Utils. Spotted by Tom Lane during review of the
nearby sslinfo TAP test patch.
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/599244.1638041239@sss.pgh.pa.us
This adds rudimentary coverage of the sslinfo extension into the SSL
test harness. The output is validated by comparing with pg_stat_ssl
to provide some level of test stability should the underlying certs
be slightly altered. A new cert is added to provide an extension to
test against.
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: Andrew Dunstan <andrew@dunslane.net>
Reviewed-by: Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>
Discussion: https://postgr.es/m/E23F9811-0C77-45DA-912F-D809AB140741@yesql.se
In order to be able to test extensions with SSL connections, allow
configure_test_server_for_ssl to create any extensions passed as
an array. Each extension is created in all the test databases.
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: Andrew Dunstan <andrew@dunslane.net>
Reviewed-by: Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>
Discussion: https://postgr.es/m/E23F9811-0C77-45DA-912F-D809AB140741@yesql.se
This commit adds a new system view pg_stat_subscription_workers, that
shows information about any errors which occur during the application of
logical replication changes as well as during performing initial table
synchronization. The subscription statistics entries are removed when the
corresponding subscription is removed.
It also adds an SQL function pg_stat_reset_subscription_worker() to reset
single subscription errors.
The contents of this view can be used by an upcoming patch that skips the
particular transaction that conflicts with the existing data on the
subscriber.
This view can be extended in the future to track other xact related
statistics like the number of xacts committed/aborted for subscription
workers.
Author: Masahiko Sawada
Reviewed-by: Greg Nancarrow, Hou Zhijie, Tang Haiying, Vignesh C, Dilip Kumar, Takamichi Osumi, Amit Kapila
Discussion: https://postgr.es/m/CAD21AoDeScrsHhLyEPYqN3sydg6PxAPVBboK=30xJfUVihNZDA@mail.gmail.com
Standardize on xoroshiro128** as our basic PRNG algorithm, eliminating
a bunch of platform dependencies as well as fundamentally-obsolete PRNG
code. In addition, this API replacement will ease replacing the
algorithm again in future, should that become necessary.
xoroshiro128** is a few percent slower than the drand48 family,
but it can produce full-width 64-bit random values not only 48-bit,
and it should be much more trustworthy. It's likely to be noticeably
faster than the platform's random(), depending on which platform you
are thinking about; and we can have non-global state vectors easily,
unlike with random(). It is not cryptographically strong, but neither
are the functions it replaces.
Fabien Coelho, reviewed by Dean Rasheed, Aleksander Alekseev, and myself
Discussion: https://postgr.es/m/alpine.DEB.2.22.394.2105241211230.165418@pseudo
Commit 6aaaa76bb added support for the GRANTED BY clause in GRANT and
REVOKE statements, but missed adding support for checking the role in
the REVOKE ROLE case. Fix by checking that the parsed role matches the
CURRENT_ROLE/CURRENT_USER requirement, and also add some tests for it.
Backpatch to v14 where GRANTED BY support was introduced.
Discussion: https://postgr.es/m/B7F6699A-A984-4943-B9BF-CEB84C003527@yesql.se
Backpatch-through: 14
Replica identities that depend directly on an index rely on a set of
properties, one of them being that all the columns defined in this index
have to be marked as NOT NULL. There was a hole in the logic with ALTER
TABLE DROP NOT NULL, where it was possible to remove the NOT NULL
property of a column part of an index used as replica identity, so block
it to avoid problems with logical decoding down the road.
The same check was already done columns part of a primary key, so the
fix is straight-forward.
Author: Haiying Tang, Hou Zhijie
Reviewed-by: Dilip Kumar, Michael Paquier
Discussion: https://postgr.es/m/OS0PR01MB6113338C102BEE8B2FFC5BD9FB619@OS0PR01MB6113.jpnprd01.prod.outlook.com
Backpatch-through: 10
It's possible that a subplan below a Memoize node contains a parameter
from above the Memoize node. If this parameter changes then cache entries
may become out-dated due to the new parameter value.
Previously Memoize was mistakenly not aware of this. We fix this here by
flushing the cache whenever a parameter that's not part of the cache
key changes.
Bug: #17213
Reported by: Elvis Pranskevichus
Author: David Rowley
Discussion: https://postgr.es/m/17213-988ed34b225a2862@postgresql.org
Backpatch-through: 14, where Memoize was added
It's possible that a subplan below a Memoize node contains a parameter
from above the Memoize node. If this parameter changes then cache entries
may become out-dated due to the new parameter value.
Previously Memoize was mistakenly not aware of this. We fix this here by
flushing the cache whenever a parameter that's not part of the cache
key changes.
Bug: #17213
Reported by: Elvis Pranskevichus
Author: David Rowley
Discussion: https://postgr.es/m/17213-988ed34b225a2862@postgresql.org
Backpatch-through: 14, where Memoize was added
Memoize would always use the hash equality operator for the cache key
types to determine if the current set of parameters were the same as some
previously cached set. Certain types such as floating points where -0.0
and +0.0 differ in their binary representation but are classed as equal by
the hash equality operator may cause problems as unless the join uses the
same operator it's possible that whichever join operator is being used
would be able to distinguish the two values. In which case we may
accidentally return in the incorrect rows out of the cache.
To fix this here we add a binary mode to Memoize to allow it to the
current set of parameters to previously cached values by comparing
bit-by-bit rather than logically using the hash equality operator. This
binary mode is always used for LATERAL joins and it's used for normal
joins when any of the join operators are not hashable.
Reported-by: Tom Lane
Author: David Rowley
Discussion: https://postgr.es/m/3004308.1632952496@sss.pgh.pa.us
Backpatch-through: 14, where Memoize was added
This commit adds a set of functions able to look at the contents of
various paths related to replication slots:
- pg_ls_logicalsnapdir, for pg_logical/snapshots/
- pg_ls_logicalmapdir, for pg_logical/mappings/
- pg_ls_replslotdir, for pg_replslot/<slot_name>/
These are intended to be used by monitoring tools. Unlike pg_ls_dir(),
execution permission can be granted to non-superusers. Roles members of
pg_monitor gain have access to those functions.
Bump catalog version.
Author: Bharath Rupireddy
Reviewed-by: Nathan Bossart, Justin Pryzby
Discussion: https://postgr.es/m/CALj2ACWsfizZjMN6bzzdxOk1ADQQeSw8HhEjhmVXn_Pu+7VzLw@mail.gmail.com
Oversights in commit 405f32fc4.
Also, add a tip (discovered the hard way) about getting Test::More
0.98 to pass its regression tests on recent Linux platforms.
Commit ac9099fc1 rearranged the logic in spgGetCache() that determines
the index's attType (nominal input data type) and leafType (actual
type stored in leaf index tuples). Turns out this broke things for
the case where (a) the actual input data type is different from the
nominal type, (b) the opclass's config function leaves leafType
defaulted, and (c) the opclass has no "compress" function. (b) caused
us to assign the actual input data type as leafType, and then since
that's not attType, we complained that a "compress" function is
required. For non-polymorphic opclasses, condition (a) arises in
binary-compatible cases, such as using SP-GiST text_ops for a varchar
column, or using any opclass on a domain over its nominal input type.
To fix, use attType for leafType when the index's declared column type
is different from but binary-compatible with attType. Do this only in
the defaulted-leafType case, to avoid overriding any explicit
selection made by the opclass.
Per bug #17294 from Ilya Anfimov. Back-patch to v14.
Discussion: https://postgr.es/m/17294-8f6c7962ce877edc@postgresql.org
This commit adds to the main regression test suite a table with all
the in-core data types (some exceptions apply). This table is not
dropped, so as pg_upgrade would be able to check the binary
compatibility of the types tracked in the table. If a new type is added
in core, this part of the tests would need a refresh but the tests are
designed to fail if that were to happen.
As this is useful for upgrades and that these rely on the objects
created in the regression test suite of the old version upgraded from,
a backpatch down to 12 is done, which is the last point where a binary
incompatible change has been done (7c15cef). This will hopefully be
enough to find out if something gets broken during the development of a
new version of Postgres, so as it is possible to take actions in
pg_upgrade itself in this case (like 0ccfc28 for sql_identifier).
An area that is not covered yet is related to external modules, which
may create their own types. The testing infrastructure of pg_upgrade is
not integrated yet with the external modules stored in core
(src/test/modules/ or contrib/, all use the same database name for their
tests so there would be an overlap). This could be improved in the
future.
Author: Justin Pryzby
Reviewed-by: Jacob Champion, Peter Eisentraut, Tom Lane, Michael Paquier
Discussion: https://postgr.es/m/20201206180248.GI24052@telsasoft.com
Backpatch-through: 12
This fills in some gaps in planner support for starts_with() and
the equivalent ^@ operator:
* A condition such as "textcol ^@ constant" can now use a regular
btree index, not only an SP-GiST index, so long as the index's
collation is C. (This works just like "textcol LIKE 'foo%'".)
* "starts_with(textcol, constant)" can be optimized the same as
"textcol ^@ constant".
* Fixed-prefix LIKE and regex patterns are now more like starts_with()
in another way: if you apply one to an SPGiST-indexed column, you'll
get an index condition using ^@ rather than two index conditions with
>= and <.
Per a complaint from Shay Rojansky. Patch by me; thanks to
Nathan Bossart for review.
Discussion: https://postgr.es/m/232599.1633800229@sss.pgh.pa.us
If a SQL-standard function body contains an INSERT ... SELECT statement,
any function parameters referenced within the SELECT were always printed
in $N style, rather than using the parameter name if any. While not
strictly incorrect, this wasn't the intention, and it's inconsistent
with the way that such parameters would be printed in any other kind
of statement.
The cause is that the recursion to get_query_def from
get_insert_query_def neglected to pass down the context->namespaces
list, passing constant NIL instead. This is a very ancient oversight,
but AFAICT it had no visible consequences before commit e717a9a18
added an outermost namespace with function parameters. We don't allow
INSERT ... SELECT as a sub-query, except in a top-level WITH clause,
where it couldn't contain any outer references that might need to access
upper namespaces. So although that's arguably a bug, I don't see any
point in changing it before v14.
In passing, harden the code added to get_parameter by e717a9a18 so that
it won't crash if a PARAM_EXTERN Param appears in an unexpected place.
Per report from Erki Eessaar. Code fix by me, regression test case
by Masahiko Sawada.
Discussion: https://postgr.es/m/AM9PR01MB8268347BED344848555167FAFE949@AM9PR01MB8268.eurprd01.prod.exchangelabs.com
Commit 81d5995b4b introduced more fine-grained errormessages for
incorrect relkinds for publication, while unlogged and temporary
tables were reported with using the same message. This provides
separate error messages for these types of relpersistence.
Author: Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>
Reviewed-by: Peter Eisentraut <peter.eisentraut@enterprisedb.com>
Reviewed-by: Jeevan Ladhe <jeevan.ladhe@enterprisedb.com>
Reviewed-by: Euler Taveira <euler@eulerto.com>
Discussion: https://postgr.es/m/CALj2ACW9S=AswyQHjtO6WMcsergMkCBTtzXGrM8DX26DzfeTLQ@mail.gmail.com
When changing REPLICA IDENTITY INDEX to another one, the target table's
relcache was not being invalidated. This leads to skipping update/delete
operations during apply on the subscriber side as the columns required to
search corresponding rows won't get logged.
Author: Tang Haiying, Hou Zhijie
Reviewed-by: Euler Taveira, Amit Kapila
Backpatch-through: 10
Discussion: https://postgr.es/m/OS0PR01MB61133CA11630DAE45BC6AD95FB939@OS0PR01MB6113.jpnprd01.prod.outlook.com
Commit 90627cf98 added support for retaining the data directory even on
successful tests, but failed to document the environment variable which
controls retention. This adds a small note to the TAP test README about
PG_TEST_NOCLEAN which when set skips removing the data directories from
successful tests.
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/2B02C1B3-3F41-4E14-92B9-005D83623A0B@yesql.se
pg_stat_get_slru() in pgstatfuncs.c would point to one element after the
end of the array PgStat_SLRUStats when finishing to scan its entries.
This had no direct consequences as no data from the extra memory area
was read, but static analyzers would rightfully complain here. So let's
be clean.
While on it, this adds one regression test in the area reserved for
system views.
Reported-by: Alexander Kozhemyakin, via AddressSanitizer
Author: Kyotaro Horiguchi
Discussion: https://postgr.es/m/17280-37da556e86032070@postgresql.org
Backpatch-through: 13
PostgreSQL 13 and newer versions are directly impacted by that through
the SQL function normalize(), which would cause a call of this function
to write one byte past its allocation if using in input an empty
string after recomposing the string with NFC and NFKC. Older versions
(v10~v12) are not directly affected by this problem as the only code
path using normalization is SASLprep in SCRAM authentication that
forbids the case of an empty string, but let's make the code more robust
anyway there so as any out-of-core callers of this function are covered.
The solution chosen to fix this issue is simple, with the addition of a
fast-exit path if the decomposed string is found as empty. This would
only happen for an empty string as at its lowest level a codepoint would
be decomposed as itself if it has no entry in the decomposition table or
if it has a decomposition size of 0.
Some tests are added to cover this issue in v13~. Note that an empty
string has always been considered as normalized (grammar "IS NF[K]{C,D}
NORMALIZED", through the SQL function is_normalized()) for all the
operations allowed (NFC, NFD, NFKC and NFKD) since this feature has been
introduced as of 2991ac5. This behavior is unchanged but some tests are
added in v13~ to check after that.
I have also checked "make normalization-check" in src/common/unicode/,
while on it (works in 13~, and breaks in older stable branches
independently of this commit).
The release notes should just mention this commit for v13~.
Reported-by: Matthijs van der Vleuten
Discussion: https://postgr.es/m/17277-0c527a373794e802@postgresql.org
Backpatch-through: 10
We've seen intermittent failures in this test on slower buildfarm
machines, which I think can be explained by assuming that autovacuum
emitted some additional WAL. Disable autovacuum to stabilize it.
In passing, use stringwise not numeric comparison to compare
WAL file names. Doesn't matter at present, but they are
hex strings not decimal ...
Discussion: https://postgr.es/m/1372189.1636499287@sss.pgh.pa.us
Commit 5a2832465f introduced some enums to represent all tables in schema
publications and used REL in their names. Use TABLE instead of REL in
those enums to avoid confusion with other objects like SEQUENCES that can
be part of a publication in the future.
In the passing, (a) Change one of the newly introduced error messages to
make it consistent for Create and Alter commands, (b) add missing alias in
one of the SQL Statements that is used to print publications associated
with the table.
Reported-by: Tomas Vondra, Peter Smith
Author: Vignesh C
Reviewed-by: Hou Zhijie, Peter Smith
Discussion: https://www.postgresql.org/message-id/CALDaNm0OANxuJ6RXqwZsM1MSY4s19nuH3734j4a72etDwvBETQ%40mail.gmail.com
The tsvector data type has always forbidden lexemes to be empty.
However, array_to_tsvector() didn't get that memo, and would
allow an empty-string array element to become an empty lexeme.
This could result in dump/restore failures later, not to mention
whatever semantic issues might be behind the original prohibition.
However, other functions that take a plain text input directly as
a lexeme value do not need a similar restriction, because they only
match the string against existing tsvector entries. In particular
it'd be a bad idea to make ts_delete() reject empty strings, since
that is the most convenient way to clean up any bad data that might
have gotten into a tsvector column via this bug.
Reflecting on that, let's also remove the prohibition against NULL
array elements in tsvector_delete_arr and tsvector_setweight_by_filter.
It seems more consistent to ignore them, as an empty-string element
would be ignored.
There's a case for back-patching this, since it's clearly a bug fix.
On balance though, it doesn't seem like something to change in a
minor release.
Jean-Christophe Arnu
Discussion: https://postgr.es/m/CAHZmTm1YVndPgUVRoag2WL0w900XcoiivDDj-gTTYBsG25c65A@mail.gmail.com
When calculating distance between float4/float8 values, we need to be a
bit more careful about NaN values in order not to trigger assert. We
consider NaN values to be equal (distace 0.0) and in infinite distance
from all other values.
On builds without asserts, this issue is mostly harmless - the ranges
may be merged in less efficient order, but the index is still correct.
Per report from Andreas Seltenreich. Backpatch to 14, where this new
BRIN opclass was introduced.
Reported-by: Andreas Seltenreich
Discussion: https://postgr.es/m/87r1bw9ukm.fsf@credativ.de
If lo_export() fails to open the target file or to write to it, it leaks
the created LargeObjectDesc and its snapshot in the top-transaction
context and resource owner. That's pretty harmless, it's a small leak
after all, but it gives the user a "Snapshot reference leak" warning.
Fix by using a short-lived memory context and no resource owner for
transient LargeObjectDescs that are opened and closed within one function
call. The leak is easiest to reproduce with lo_export() on a directory
that doesn't exist, but in principle the other lo_* functions could also
fail.
Backpatch to all supported versions.
Reported-by: Andrew B
Reviewed-by: Alvaro Herrera
Discussion: https://www.postgresql.org/message-id/32bf767a-2d65-71c4-f170-122f416bab7e@iki.fi
Commit b4af70cb, which simplified state managed by VACUUM, performed
refactoring of parallel VACUUM in passing. Confusion about the exact
details of the tasks that the leader process is responsible for led to
code that made it possible for parallel VACUUM to miss a subset of the
table's indexes entirely. Specifically, indexes that fell under the
min_parallel_index_scan_size size cutoff were missed. These indexes are
supposed to be vacuumed by the leader (alongside any parallel unsafe
indexes), but weren't vacuumed at all. Affected indexes could easily
end up with duplicate heap TIDs, once heap TIDs were recycled for new
heap tuples. This had generic symptoms that might be seen with almost
any index corruption involving structural inconsistencies between an
index and its table.
To fix, make sure that the parallel VACUUM leader process performs any
required index vacuuming for indexes that happen to be below the size
cutoff. Also document the design of parallel VACUUM with these
below-size-cutoff indexes.
It's unclear how many users might be affected by this bug. There had to
be at least three indexes on the table to hit the bug: a smaller index,
plus at least two additional indexes that themselves exceed the size
cutoff. Cases with just one additional index would not run into
trouble, since the parallel VACUUM cost model requires two
larger-than-cutoff indexes on the table to apply any parallel
processing. Note also that autovacuum was not affected, since it never
uses parallel processing.
Test case based on tests from a larger patch to test parallel VACUUM by
Masahiko Sawada.
Many thanks to Kamigishi Rei for her invaluable help with tracking this
problem down.
Author: Peter Geoghegan <pg@bowt.ie>
Author: Masahiko Sawada <sawada.mshk@gmail.com>
Reported-By: Kamigishi Rei <iijima.yun@koumakan.jp>
Reported-By: Andrew Gierth <andrew@tao11.riddles.org.uk>
Diagnosed-By: Andres Freund <andres@anarazel.de>
Bug: #17245
Discussion: https://postgr.es/m/17245-ddf06aaf85735f36@postgresql.org
Discussion: https://postgr.es/m/20211030023740.qbnsl2xaoh2grq3d@alap3.anarazel.de
Backpatch: 14-, where the refactoring commit appears.
The opclass parameter Datums from the old index are fetched in the same
way as for predicates and expressions, by grabbing them directly from
the system catalogs. They are then copied into the new IndexInfo that
will be used for the creation of the new copy.
This caused the new index to be rebuilt with default parameters rather
than the ones pre-defined by a user. The only way to get back a new
index with correct opclass parameters would be to recreate a new index
from scratch.
The issue has been introduced by 911e702.
Author: Michael Paquier
Reviewed-by: Zhihong Yu
Discussion: https://postgr.es/m/YX0CG/QpLXcPr8HJ@paquier.xyz
Backpatch-through: 13
Rearrange src/test/perl/README so that the first section is more
clearly "how to run these tests", and the rest "how to write new
tests". Add some basic info there about debugging test failures.
Then, add cross-refs to that READNE from other READMEs that
describe how to run TAP tests.
Per suggestion from Kevin Burke, though this is not his original
patch.
Discussion: https://postgr.es/m/CAKcy5eiSbwiQnmCfnOnDCVC7B8fYyev3E=6pvvECP9pLE-Fcuw@mail.gmail.com
Previously, we pointed at the surrounding block's BEGIN keyword.
If there are multiple variables being initialized in a DECLARE section,
this isn't good enough: it can be quite confusing and unhelpful.
We do know where the variable's declaration started, so it just takes
a tiny bit more error-reporting infrastructure to use that.
Discussion: https://postgr.es/m/713975.1635530414@sss.pgh.pa.us
We had a test showing that a variable isn't referenceable in its
own initialization expression, nor in prior ones in the same block.
It *is* referenceable in later expressions in the same block, but
AFAICS there is no test case exercising that. Add one, and also
add some error cases.
Also, document that this is possible, since the docs failed to
cover the point.
Per question from tomás at tuxteam. I don't feel any need to
back-patch this, but we should ensure we don't break it in future.
Discussion: https://postgr.es/m/20211029121435.GA5414@tuxteam.de
Commits fdd965d07 and 3cd9c3b92 tested CREATE INDEX CONCURRENTLY by
launching two separate pgbench runs concurrently. This was needed so
that only a single client thread would run CREATE INDEX CONCURRENTLY,
avoiding deadlock between two CICs. However, there's a better way,
which is to use an advisory lock to prevent concurrent CICs. That's
better in part because the test code is shorter and more readable, but
mostly because it automatically scales things to launch an appropriate
number of CICs relative to the number of INSERT transactions.
As committed, typically half to three-quarters of the CIC transactions
were pointless because the INSERT transactions had already stopped.
In passing, remove background_pgbench, which was added to support
these tests and isn't needed anymore. We can always put it back
if we find a use for it later.
Back-patch to v12; older pgbench versions lack the
conditional-execution features needed for this method.
Tom Lane and Andrey Borodin
Discussion: https://postgr.es/m/139687.1635277318@sss.pgh.pa.us
This adds tests checking for the execution of both commands. The
recovery test 002_archiving.pl is nicely adapted to that, as promotion
is triggered already twice there, and even if any of those commands fail
they don't affect recovery or promotion.
A command success is checked using a file generated by an "echo"
command, that should be able to work in all the buildfarm environments,
even Msys (but we'll know soon about that). Command failure is tested
with an "echo" command that points to a path that does not exist,
scanning the backend logs to make sure that the failure happens. Both
rely on the backend triggering the commands from the root of the data
folder, making its logic more robust.
Thanks to Neha Sharma for the extra tests on Windows.
Author: Amul Sul, Michael Paquier
Reviewed-by: Andres Freund, Euler Taveira
Discussion: https://postgr.es/m/CAAJ_b95R_c4T5moq30qsybSU=eDzDHm=4SPiAWaiMWc2OW7=1Q@mail.gmail.com
Grant privileges on views pg_backend_memory_contexts and
pg_shmem_allocations to the role pg_read_all_stats. Also grant on the
underlying functions that those views depend on.
Author: Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>
Reviewed-by: Nathan Bossart <bossartn@amazon.com>
Discussion: https://postgr.es/m/CALj2ACWAZo3Ar_EVsn2Zf9irG+hYK3cmh1KWhZS_Od45nd01RA@mail.gmail.com
Commit b4c4a00ea refactored the gist of the sslfiles target into a
separate makefile in order to override settings in Makefile.global.
The invocation of this this file didn't however include the absolute
path for VPATH builds, resulting in "make clean" failing. Fix by
providing the path to the new makefile.
Reported-by: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/20211026174152.jjcagswnbhxu7uqz@alap3.anarazel.de
A new option "FOR ALL TABLES IN SCHEMA" in Create/Alter Publication allows
one or more schemas to be specified, whose tables are selected by the
publisher for sending the data to the subscriber.
The new syntax allows specifying both the tables and schemas. For example:
CREATE PUBLICATION pub1 FOR TABLE t1,t2,t3, ALL TABLES IN SCHEMA s1,s2;
OR
ALTER PUBLICATION pub1 ADD TABLE t1,t2,t3, ALL TABLES IN SCHEMA s1,s2;
A new system table "pg_publication_namespace" has been added, to maintain
the schemas that the user wants to publish through the publication.
Modified the output plugin (pgoutput) to publish the changes if the
relation is part of schema publication.
Updates pg_dump to identify and dump schema publications. Updates the \d
family of commands to display schema publications and \dRp+ variant will
now display associated schemas if any.
Author: Vignesh C, Hou Zhijie, Amit Kapila
Syntax-Suggested-by: Tom Lane, Alvaro Herrera
Reviewed-by: Greg Nancarrow, Masahiko Sawada, Hou Zhijie, Amit Kapila, Haiying Tang, Ajin Cherian, Rahila Syed, Bharath Rupireddy, Mark Dilger
Tested-by: Haiying Tang
Discussion: https://www.postgresql.org/message-id/CALDaNm0OANxuJ6RXqwZsM1MSY4s19nuH3734j4a72etDwvBETQ@mail.gmail.com
Remove superuser check, allowing any user granted permissions on
pg_log_backend_memory_contexts() to log the memory contexts of any
backend.
Note that this could allow a privileged non-superuser to log the
memory contexts of a superuser backend, but as discussed, that does
not seem to be a problem.
Reviewed-by: Nathan Bossart, Bharath Rupireddy, Michael Paquier, Kyotaro Horiguchi, Andres Freund
Discussion: https://postgr.es/m/e5cf6684d17c8d1ef4904ae248605ccd6da03e72.camel@j-davis.com
The foreign data wrapper's validator function provides a HINT message with
list of valid options for the object specified in CREATE or ALTER command,
when the option given in the command is invalid. Previously
postgresql_fdw_validator() and the validator functions for postgres_fdw and
dblink_fdw worked in that way even there were no valid options in the object,
which could lead to the HINT message with empty list (because there were
no valid options). For example, ALTER FOREIGN DATA WRAPPER postgres_fdw
OPTIONS (format 'csv') reported the following ERROR and HINT messages.
This behavior was confusing.
ERROR: invalid option "format"
HINT: Valid options in this context are:
There is no such issue in file_fdw. The validator function for file_fdw
reports the HINT message "There are no valid options in this context."
instead in that case.
This commit improves postgresql_fdw_validator() and the validator functions
for postgres_fdw and dblink_fdw so that they do likewise. For example,
this change causes the above ALTER FOREIGN DATA WRAPPER command to
report the following messages.
ERROR: invalid option "nonexistent"
HINT: There are no valid options in this context.
Author: Kosei Masumura
Reviewed-by: Bharath Rupireddy, Fujii Masao
Discussion: https://postgr.es/m/557d06cebe19081bfcc83ee2affc98d3@oss.nttdata.com
The case checking for a NULL output when a slot does not exist was
too lax, as it was passing for any output generated by the query. This
fixes the matching pattern to be what it should be, matching only on
"||".
Oversight in b4ada4e.
The command is supported for physical slots for now, and returns the
type of slot, its restart_lsn and its restart_tli.
This will be useful for an upcoming patch related to pg_receivewal, to
allow the tool to be able to stream from the position of a slot, rather
than the last WAL position flushed by the backend (as reported by
IDENTIFY_SYSTEM) if the archive directory is found as empty, which would
be an advantage in the case of switching to a different archive
locations with the same slot used to avoid holes in WAL segment
archives.
Author: Ronan Dunklau
Reviewed-by: Kyotaro Horiguchi, Michael Paquier, Bharath Rupireddy
Discussion: https://postgr.es/m/18708360.4lzOvYHigE@aivenronan
The five modules in our TAP test framework all had names in the top
level namespace. This is unwise because, even though we're not
exporting them to CPAN, the names can leak, for example if they are
exported by the RPM build process. We therefore move the modules to the
PostgreSQL::Test namespace. In the process PostgresNode is renamed to
Cluster, and TestLib is renamed to Utils. PostgresVersion becomes simply
PostgreSQL::Version, to avoid possible confusion about what it's the
version of.
Discussion: https://postgr.es/m/aede93a4-7d92-ef26-398f-5094944c2504@dunslane.net
Reviewed by Erik Rijkers and Michael Paquier
CIC and REINDEX CONCURRENTLY assume backends see their catalog changes
no later than each backend's next transaction start. That failed to
hold when a backend absorbed a relevant invalidation in the middle of
running RelationBuildDesc() on the CIC index. Queries that use the
resulting index can silently fail to find rows. Fix this for future
index builds by making RelationBuildDesc() loop until it finishes
without accepting a relevant invalidation. It may be necessary to
reindex to recover from past occurrences; REINDEX CONCURRENTLY suffices.
Back-patch to 9.6 (all supported versions).
Noah Misch and Andrey Borodin, reviewed (in earlier versions) by Andres
Freund.
Discussion: https://postgr.es/m/20210730022548.GA1940096@gust.leadboat.com
For non-MSVC builds this is make's $(CURDIR), while for MSVC builds it
is $topdir/$Config/$module. The directory is added as the second element
in the PATH, so that the install location takes precedence, but the
added PATH element takes precedence over the rest of the PATH.
The reason for this is to allow tests to find built products that are
not installed, such as the libpq_pipeline test driver.
The libpq_pipeline test is adjusted to take advantage of this.
Based on a suggestion from Andres Freund.
Backpatch to release 14.
Discussion: https://postgr.es/m/4941f5a5-2d50-1a0e-6701-14c5fefe92d6@dunslane.net
The certificate serial number generation was changed in b4c4a00ea to
use the current timestamp. The testharness must thus interrogate the
cert for the serialnumber using "openssl x509" which emits the serial
in hex format. Converting the serial to integer format to match whats
in pg_stat_ssl requires a 64-bit capable Perl. This adds a fallback
to checking for an integer when the tests with a 32-bit Perl.
Per failure on buildfarm member prairiedog.
Discussion: https://postgr.es/m/0D295F43-806D-4B3F-AB98-F941A19E0271@yesql.se
Support issuing more than one "-c command" switch to a single
psql invocation. This allows combining some things that formerly
required two or more backend launches into a single session.
In particular, we can issue DROP DATABASE as one of the -c commands
without getting "DROP DATABASE cannot run inside a transaction block".
In addition to reducing the number of sessions needed, this patch
also suppresses "NOTICE: database "foo" does not exist, skipping"
chatter that was formerly generated during pg_regress's DROP DATABASE
(or ROLE) IF NOT EXISTS calls. That moves us another step closer
to the ideal of not seeing any messages during successful build/test.
This also eliminates some hard-coded restrictions on the length of
the commands issued. I don't think we were anywhere near hitting
those, but getting rid of the limit is comforting.
Patch by me, but thanks to Nathan Bossart for starting the discussion.
Discussion: https://postgr.es/m/DCBAE0E4-BD56-482F-8A70-7FD0DC0860BE@amazon.com
Commit 1b5d797cd4 intended to relax the lock level used to rename
indexes, but inadvertently allowed *any* relation to be renamed with a
lowered lock level, as long as the command is spelled ALTER INDEX.
That's undesirable for other relation types, so retry the operation with
the higher lock if the relation turns out not to be an index.
After this fix, ALTER INDEX <sometable> RENAME will require access
exclusive lock, which it didn't before.
Author: Nathan Bossart <bossartn@amazon.com>
Author: Álvaro Herrera <alvherre@alvh.no-ip.org>
Reported-by: Onder Kalaci <onderk@microsoft.com>
Discussion: https://postgr.es/m/PH0PR21MB1328189E2821CDEC646F8178D8AE9@PH0PR21MB1328.namprd21.prod.outlook.com
ldapsearch's deprecated -h/-p arguments were removed, need to use -H now -
which has been around for over 20 years.
As perltidy insists on reflowing the parameters anyway, change order and
"phrasing" to yield a less confusing layout (per suggestion from Tom Lane).
Discussion: https://postgr.es/m/20211009233850.wvr6apcrw2ai6cnj@alap3.anarazel.de
Backpatch: 11-, where the tests were added.
The Makefile handling of certificate and keypairs used for TLS testing
had become quite difficult to work with. Adding a new cert without the
need to regenerate everything was too complicated. This patch refactors
the sslfiles make target such that adding a new certificate requires
only adding a .config file, adding it to the top of the Makefile, and
running make sslfiles.
Improvements:
- Interfile dependencies should be fixed, with the exception of the CRL
dirs.
- New certificates have serial numbers based on the current time,
reducing the chance of collision.
- The CA index state is created on demand and cleaned up automatically
at the end of the Make run.
- *.config files are now self-contained; one certificate needs one
config file instead of two.
- Duplication is reduced, and along with it some unneeded code (and
possible copy-paste errors).
- all configuration files underneath the conf/ directory.
The target is moved to its own makefile in order to avoid colliding
with global make settings.
Author: Jacob Champion <pchampion@vmware.com>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://postgr.es/m/d15a9838344ba090e09fd866abf913584ea19fb7.camel@vmware.com
An update such as "UPDATE ... SET fld[n].subfld = whatever"
failed if the array elements were domains rather than plain
composites. That's because isAssignmentIndirectionExpr()
failed to cope with the CoerceToDomain node that would appear
in the expression tree in this case. The result would typically
be a crash, and even if we accidentally didn't crash, we'd not
correctly preserve other fields of the same array element.
Per report from Onder Kalaci. Back-patch to v11 where arrays of
domains came in.
Discussion: https://postgr.es/m/PH0PR21MB132823A46AA36F0685B7A29AD8BD9@PH0PR21MB1328.namprd21.prod.outlook.com
The grammar of this command run on indexes with column names has always
been authorized by the parser, and it has never been documented.
Since 911e702, it is possible to define opclass parameters as of CREATE
INDEX, which actually broke the old case of ALTER INDEX/TABLE where
relation-level parameters n_distinct and n_distinct_inherited could be
defined for an index (see 76a47c0 and its thread where this point has
been touched, still remained unused). Attempting to do that in v13~
would cause the index to become unusable, as there is a new dedicated
code path to load opclass parameters instead of the relation-level ones
previously available. Note that it is possible to fix things with a
manual catalog update to bring the relation back online.
This commit disables this command for now as the use of column names for
indexes does not make sense anyway, particularly when it comes to index
expressions where names are automatically computed. One way to properly
support this case properly in the future would be to use column numbers
when it comes to indexes, in the same way as ALTER INDEX .. ALTER COLUMN
.. SET STATISTICS.
Partitioned indexes were already blocked, but not indexes. Some tests
are added for both cases.
There was some code in ANALYZE to enforce n_distinct to be used for an
index expression if the parameter was defined, but just remove it for
now until/if there is support for this (note that index-level parameters
never had support in pg_dump either, previously), so this was just dead
code.
Reported-by: Matthijs van der Vleuten
Author: Nathan Bossart, Michael Paquier
Reviewed-by: Vik Fearing, Dilip Kumar
Discussion: https://postgr.es/m/17220-15d684c6c2171a83@postgresql.org
Backpatch-through: 13
Failing to do that, any direct inserts/updates of those partitions
would fail to enforce the correct constraint, that is, one that
considers the new partition constraint of their parent table.
Backpatch to 10.
Reported by: Hou Zhijie <houzj.fnst@fujitsu.com>
Author: Amit Langote <amitlangote09@gmail.com>
Author: Álvaro Herrera <alvherre@alvh.no-ip.org>
Reviewed-by: Nitin Jadhav <nitinjadhavpostgres@gmail.com>
Reviewed-by: Pavel Borisov <pashkin.elfe@gmail.com>
Discussion: https://postgr.es/m/OS3PR01MB5718DA1C4609A25186D1FBF194089%40OS3PR01MB5718.jpnprd01.prod.outlook.com
Do not update shm_mq's mq_bytes_written until we have written
an amount of data greater than 1/4th of the ring size, unless
the caller of shm_mq_send(v) requests a flush at the end of
the message. This reduces the number of calls to SetLatch(),
and also the number of CPU cache misses, considerably, and thus
makes shm_mq significantly faster.
Dilip Kumar, reviewed by Zhihong Yu and Tomas Vondra. Some
minor cosmetic changes by me.
Discussion: http://postgr.es/m/CAFiTN-tVXqn_OG7tHNeSkBbN+iiCZTiQ83uakax43y1sQb2OBA@mail.gmail.com
If a function-in-FROM laterally references the output of some sub-SELECT
earlier in the FROM clause, and we are able to flatten that sub-SELECT
into the outer query, the expression(s) copied into the function RTE
missed being processed by eval_const_expressions. This'd lead to trouble
and probable crashes at execution if such expressions contained
named-argument function call syntax or functions with defaulted arguments.
The bug is masked if the query contains any explicit JOIN syntax, which
may help explain why we'd not noticed.
Per bug #17227 from Bernd Dorn. This is an oversight in commit 7266d0997,
so back-patch to v13 where that came in.
Discussion: https://postgr.es/m/17227-5a28ed1512189fa4@postgresql.org
The test code added with ff9f111bce fails under valgrind, and probably
other slow cases too, because if (say) autovacuum runs in between and
produces WAL of its own, the large INSERT fails to account for that in
the LSN calculations. Rewrite to use a DO loop.
Per complaint from Andres Freund
Backpatch to all branches.
Discussion: https://postgr.es/m/20211013180338.5guyqzpkcisqugrl@alap3.anarazel.de
Incrementing the level of the call stack reported is useful for
debugging purposes as it allows to control which part of the test is
exactly failing, especially if a test is structured with subroutines
that call routines from Test::More.
This adds more incrementations of $Test::Builder::Level where debugging
gets improved (for example it does not make sense for some paths like
pg_rewind where long subroutines are used).
A note is added to src/test/perl/README about that, based on a
suggestion from Andrew Dunstan and a wording coming from both of us.
Usage of Test::Builder::Level has spread in 12, so a backpatch down to
this version is done.
Reviewed-by: Andrew Dunstan, Peter Eisentraut, Daniel Gustafsson
Discussion: https://postgr.es/m/YV1CCFwgM1RV1LeS@paquier.xyz
Backpatch-through: 12
The previous text didn't provide any clear explanation of our policy
around TAP test portability. The recipe for using perlbrew had some
problems, too: it resulted in a non-shared libperl (preventing
testing of plperl) and it caused some modules to be updated to
current when the point of the recipe is to build an old environment.
Discussion: https://postgr.es/m/E1mYY6Z-0006OL-QN@gemulon.postgresql.org
This fixes a loss of precision that occurs when the first input is
very close to 1, so that its logarithm is very small.
Formerly, during the initial low-precision calculation to estimate the
result weight, the logarithm was computed to a local rscale that was
capped to NUMERIC_MAX_DISPLAY_SCALE (1000). However, the base may be
as close as 1e-16383 to 1, hence its logarithm may be as small as
1e-16383, and so the local rscale needs to be allowed to exceed 16383,
otherwise all precision is lost, leading to a poor choice of rscale
for the full-precision calculation.
Fix this by removing the cap on the local rscale during the initial
low-precision calculation, as we already do in the full-precision
calculation. This doesn't change the fact that the initial calculation
is a low-precision approximation, computing the logarithm to around 8
significant digits, which is very fast, especially when the base is
very close to 1.
Patch by me, reviewed by Alvaro Herrera.
Discussion: https://postgr.es/m/CAEZATCV-Ceu%2BHpRMf416yUe4KKFv%3DtdgXQAe5-7S9tD%3D5E-T1g%40mail.gmail.com
3c5b0685b9 used setFilePointer() to set the position of the filehandle, but
passed the wrong filehandle, always leaving the position at 0. Instead of just
fixing that, remove use of setFilePointer(), we have a perl fd at this point,
so we can just use perl's seek().
Additionally, the perl filehandle wasn't closed, just the windows filehandle.
Reviewed-By: Andrew Dunstan <andrew@dunslane.net>
Author: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/20211003173038.64mmhgxctfqn7wl6@alap3.anarazel.de
Backpatch: 9.6-, like 3c5b0685b9
Prior to v14, we insisted that the query in RETURN QUERY be of a type
that returns tuples. (For instance, INSERT RETURNING was allowed,
but not plain INSERT.) That happened indirectly because we opened a
cursor for the query, so spi.c checked SPI_is_cursor_plan(). As a
consequence, the error message wasn't terribly on-point, but at least
it was there.
Commit 2f48ede08 lost this detail. Instead, plain RETURN QUERY
insisted that the query be a SELECT (by checking for SPI_OK_SELECT)
while RETURN QUERY EXECUTE failed to check the query type at all.
Neither of these changes was intended.
The only convenient place to check this in the EXECUTE case is inside
_SPI_execute_plan, because we haven't done parse analysis until then.
So we need to pass down a flag saying whether to enforce that the
query returns tuples. Fortunately, we can squeeze another boolean
into struct SPIExecuteOptions without an ABI break, since there's
padding space there. (It's unlikely that any extensions would
already be using this new struct, but preserving ABI in v14 seems
like a smart idea anyway.)
Within spi.c, it seemed like _SPI_execute_plan's parameter list
was already ridiculously long, and I didn't want to make it longer.
So I thought of passing SPIExecuteOptions down as-is, allowing that
parameter list to become much shorter. This makes the patch a bit
more invasive than it might otherwise be, but it's all internal to
spi.c, so that seems fine.
Per report from Marc Bachmann. Back-patch to v14 where the
faulty code came in.
Discussion: https://postgr.es/m/1F2F75F0-27DF-406F-848D-8B50C7EEF06A@gmail.com
The previous approach didn't really work on windows, due to the PATH separator
being ';' not ':'. Instead of making the PATH change more complicated,
reference the binary using the TESTDIR environment.
Reported-By: Andres Freund <andres@anarazel.de>
Suggested-By: Andrew Dunstan <andrew@dunslane.net>
Discussion: https://postgr.es/m/20210930214040.odkdd42vknvzifm6@alap3.anarazel.de
Backpatch: 14-, where the test was introduced.
Commit ff9f111bce added some test code that's unportable and doesn't
add meaningful coverage. Remove it rather than try and get it to work
everywhere.
While at it, fix a typo in a log message added by the aforementioned
commit.
Backpatch to 14.
Discussion: https://postgr.es/m/3000074.1632947632@sss.pgh.pa.us
Computing related timestamps by subtracting "N days" is sensitive
to the prevailing timezone, since we interpret that as "same local
time on the N'th prior day". Even though the intervals in question
are only two to four days, through remarkable bad luck they managed
to cross the end of Ramadan in 2014, causing the test's output to
change if timezone is set to Africa/Casablanca. (Maybe in other
Muslim areas as well; I didn't check.) There's absolutely no reason
for this test to exercise interval subtraction, so just get rid of
that and use plain timestamptz constants representing the intended
values.
Per report from Andres Freund. Back-patch to v10 where this test
script came in.
Discussion: https://postgr.es/m/20210930183641.7lh4jhvpipvromca@alap3.anarazel.de
First, as pointed out by Tom Lane and Michael Paquier, I failed to
realize that Windows' PostgresNode needs an extra pg_hba.conf line
(added by PostgresNode->set_replication_conf, called internally by
->init() when 'allows_streaming=>1' is given -- but I purposefully
omitted that). I think a good fix should be to have nodes with only
'has_archiving=>1' set up for replication too, but that's a bigger
discussion. Fix it by calling ->set_replication_conf, which is not
unprecedented, as pointed out by Andrew Dunstan.
I also forgot to uncomment a ->finish() call for a pumpable IPC::Run
file descriptor. Apparently this is innocuous in almost all platforms.
Backpatch to 14. The older branches were added this file too, but not
this particular part of the test.
Discussion: https://postgr.es/m/3000074.1632947632@sss.pgh.pa.us
Discussion: https://postgr.es/m/YVT7qwhR8JmC2kfz@paquier.xyz
Physical replication always ships WAL segment files to replicas once
they are complete. This is a problem if one WAL record is split across
a segment boundary and the primary server crashes before writing down
the segment with the next portion of the WAL record: WAL writing after
crash recovery would happily resume at the point where the broken record
started, overwriting that record ... but any standby or backup may have
already received a copy of that segment, and they are not rewinding.
This causes standbys to stop following the primary after the latter
crashes:
LOG: invalid contrecord length 7262 at A8/D9FFFBC8
because the standby is still trying to read the continuation record
(contrecord) for the original long WAL record, but it is not there and
it will never be. A workaround is to stop the replica, delete the WAL
file, and restart it -- at which point a fresh copy is brought over from
the primary. But that's pretty labor intensive, and I bet many users
would just give up and re-clone the standby instead.
A fix for this problem was already attempted in commit 515e3d84a0, but
it only addressed the case for the scenario of WAL archiving, so
streaming replication would still be a problem (as well as other things
such as taking a filesystem-level backup while the server is down after
having crashed), and it had performance scalability problems too; so it
had to be reverted.
This commit fixes the problem using an approach suggested by Andres
Freund, whereby the initial portion(s) of the split-up WAL record are
kept, and a special type of WAL record is written where the contrecord
was lost, so that WAL replay in the replica knows to skip the broken
parts. With this approach, we can continue to stream/archive segment
files as soon as they are complete, and replay of the broken records
will proceed across the crash point without a hitch.
Because a new type of WAL record is added, users should be careful to
upgrade standbys first, primaries later. Otherwise they risk the standby
being unable to start if the primary happens to write such a record.
A new TAP test that exercises this is added, but the portability of it
is yet to be seen.
This has been wrong since the introduction of physical replication, so
backpatch all the way back. In stable branches, keep the new
XLogReaderState members at the end of the struct, to avoid an ABI
break.
Author: Álvaro Herrera <alvherre@alvh.no-ip.org>
Reviewed-by: Kyotaro Horiguchi <horikyota.ntt@gmail.com>
Reviewed-by: Nathan Bossart <bossartn@amazon.com>
Discussion: https://postgr.es/m/202108232252.dh7uxf6oxwcy@alvherre.pgsql
Updates/Deletes on a partition were allowed even without replica identity
after the parent table was added to a publication. This would later lead
to an error on subscribers. The reason was that we were not invalidating
the partition's relcache and the publication information for partitions
was not getting rebuilt. Similarly, we were not invalidating the
partitions' relcache after dropping a partitioned table from a publication
which will prohibit Updates/Deletes on its partition without replica
identity even without any publication.
Reported-by: Haiying Tang
Author: Hou Zhijie and Vignesh C
Reviewed-by: Vignesh C and Amit Kapila
Backpatch-through: 13
Discussion: https://postgr.es/m/OS0PR01MB6113D77F583C922F1CEAA1C3FBD29@OS0PR01MB6113.jpnprd01.prod.outlook.com
Contrary to the output of native perl, Msys perl generates outputs with
CRLFs characters. There are already places in the TAP code where CRLFs
(\r\n) are automatically converted to LF (\n) on Msys, but we missed a
couple of places when running commands and using their output for
comparison, that would lead to failures.
This problem has been found thanks to the test added in 5adb067 using
TestLib::command_checks_all(), but after a closer look more code paths
were missing a filter.
This is backpatched all the way down to prevent any surprises if a new
test is introduced in stable branches.
Reviewed-by: Andrew Dunstan, Álvaro Herrera
Discussion: https://postgr.es/m/1252480.1631829409@sss.pgh.pa.us
Backpatch-through: 9.6
Commit 55dc86eca changed pull_varnos to use (if possible) the associated
ph_eval_at for a PlaceHolderVar. I missed a fine point though: we might
be looking at a PHV in the quals or tlist of a child appendrel, in which
case we need to compute a ph_eval_at value that's been translated in the
same way that the PHV itself has been (cf. adjust_appendrel_attrs).
Fortunately, enough info is available in the PlaceHolderInfo to make
such translation possible without additional outside data, so we don't
need another round of uglification of planner APIs. This is a little
bit complicated, but since it's a hard-to-hit corner case, I'm not much
worried about adding cycles here.
Per report from Jaime Casanova. Back-patch to v12, like the previous
commit.
Discussion: https://postgr.es/m/20210915230959.GB17635@ahch-to
The rewriter transformation for SEARCH BREADTH FIRST produces a
FieldSelect on a Var of type RECORD, where the Var references the
recursive union's worktable output. EXPLAIN VERBOSE failed to handle
this case, because it only expected such Vars to appear in CteScans
not WorkTableScans. Fix that, and add some test cases exercising
EXPLAIN on SEARCH and CYCLE queries.
In principle this oversight is an old bug, but it seems that the
case is unreachable without SEARCH BREADTH FIRST, because the
parser fails when attempting to create such a reference manually.
So for today I'll just patch HEAD/v14. Someday we might find that
the code portion of this patch needs to be back-patched further.
Per report from Atsushi Torikoshi.
Discussion: https://postgr.es/m/5bafa66ad529e11860339565c9e7c166@oss.nttdata.com
It's possible for us to copy an AlternativeSubPlan expression node
into multiple places, for example the scan quals of several
partition children. Then it's possible that we choose a different
one of the alternatives as optimal in each place. Commit 41efb8340
failed to consider this scenario, so its attempt to remove "unused"
subplans could remove subplans that were still used elsewhere.
Fix by delaying the removal logic until we've examined all the
AlternativeSubPlans in a given query level. (This does assume that
AlternativeSubPlans couldn't get copied to other query levels, but
for the foreseeable future that's fine; cf qual_is_pushdown_safe.)
Per report from Rajkumar Raghuwanshi. Back-patch to v14
where the faulty logic came in.
Discussion: https://postgr.es/m/CAKcux6==O3NNZC3bZ2prRYv3cjm3_Zw1GfzmOjEVqYN4jub2+Q@mail.gmail.com
We have long forbidden fetching backwards from a NO SCROLL cursor,
but the prohibition didn't extend to cases in which we rewind the
query altogether and then re-fetch forwards. I think the reason is
that this logic was mainly meant to protect plan nodes that can't
be run in the reverse direction. However, re-reading the query output
is problematic if the query is volatile (which includes SELECT FOR
UPDATE, not just queries with volatile functions): the re-read can
produce different results, which confuses the cursor navigation logic
completely. Another reason for disliking this approach is that some
code paths will either fetch backwards or rewind-and-fetch-forwards
depending on the distance to the target row; so that seemingly
identical use-cases may or may not draw the "cursor can only scan
forward" error. Hence, let's clean things up by disallowing rewind
as well as fetch-backwards in a NO SCROLL cursor.
Ordinarily we'd only make such a definitional change in HEAD, but
there is a third reason to consider this change now. Commit ba2c6d6ce
created some new user-visible anomalies for non-scrollable cursors
WITH HOLD, in that navigation in the cursor result got confused if the
cursor had been partially read before committing. The only good way
to resolve those anomalies is to forbid rewinding such a cursor, which
allows removal of the incorrect cursor state manipulations that
ba2c6d6ce added to PersistHoldablePortal.
To minimize the behavioral change in the back branches (including
v14), refuse to rewind a NO SCROLL cursor only when it has a holdStore,
ie has been held over from a previous transaction due to WITH HOLD.
This should avoid breaking most applications that have been sloppy
about whether to declare cursors as scrollable. We'll enforce the
prohibition across-the-board beginning in v15.
Back-patch to v11, as ba2c6d6ce was.
Discussion: https://postgr.es/m/3712911.1631207435@sss.pgh.pa.us
This switches the default ACL to what the documentation has recommended
since CVE-2018-1058. Upgrades will carry forward any old ownership and
ACL. Sites that declined the 2018 recommendation should take a fresh
look. Recipes for commissioning a new database cluster from scratch may
need to create a schema, grant more privileges, etc. Out-of-tree test
suites may require such updates.
Reviewed by Peter Eisentraut.
Discussion: https://postgr.es/m/20201031163518.GB4039133@rfd.leadboat.com
If we copy data-modifying CTEs from the original query to a replacement
query (from a DO INSTEAD rule), we must set hasModifyingCTE properly
in the replacement query. Failure to do this can cause various
unpleasantness, such as unsafe usage of parallel plans. The code also
neglected to propagate hasRecursive, though that's only cosmetic at
the moment.
A difficulty arises if the rule action is an INSERT...SELECT. We
attach the original query's RTEs and CTEs to the sub-SELECT Query, but
data-modifying CTEs are only allowed to appear in the topmost Query.
For the moment, throw an error in such cases. It would probably be
possible to avoid this error by attaching the CTEs to the top INSERT
Query instead; but that would require a bunch of new code to adjust
ctelevelsup references. Given the narrowness of the use-case, and
the need to back-patch this fix, it does not seem worth the trouble
for now. We can revisit this if we get field complaints.
Per report from Greg Nancarrow. Back-patch to all supported branches.
(The test case added here does not fail before v10, but there are
plenty of places checking top-level hasModifyingCTE in 9.6, so I have
no doubt that this code change is necessary there too.)
Greg Nancarrow and Tom Lane
Discussion: https://postgr.es/m/CAJcOf-f68DT=26YAMz_i0+Au3TcLO5oiHY5=fL6Sfuits6r+_w@mail.gmail.com
Discussion: https://postgr.es/m/CAJcOf-fAdj=nDKMsRhQzndm-O13NY4dL6xGcEvdX5Xvbbi0V7g@mail.gmail.com
The correct nomenclature for the highest privileged user is superuser
and not "super user", this replaces the few instances where that was
used erroneously. No user-visible changes are done as all changes are
in comments, so no back-patching.
Author: Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>
Discussion: https://postgr.es/m/CALj2ACW3snGBD8BAQiArMDS1Y43LuX3ymwO+N8aUg1Hrv6hYNw@mail.gmail.com
Commit 01e658fa74 added hash support for row types. This also added
support for hashing anonymous record types, using the same approach
that the type cache uses for comparison support for record types: It
just reports that it works, but it might fail at run time if a
component type doesn't actually support the operation. We get away
with that for comparison because most types support that. But some
types don't support hashing, so the current state can result in
failures at run time where the planner chooses hashing over sorting,
whereas that previously worked if only sorting was an option.
We do, however, want the record hashing support for path tracking in
recursive unions, and the SEARCH and CYCLE clauses built on that. In
that case, hashing is the only plan option. So enable that, this
commit implements the following approach: The type cache does not
report that hashing is available for the record type. This undoes
that part of 01e658fa74. Instead, callers that require hashing no
matter what can override that result themselves. This patch only
touches the callers to make the aforementioned recursive query cases
work, namely the parse analysis of unions, as well as the hash_array()
function.
Reported-by: Sait Talha Nisanci <sait.nisanci@microsoft.com>
Bug: #17158
Discussion: https://www.postgresql.org/message-id/flat/17158-8a2ba823982537a4%40postgresql.org
Updates/Deletes on a relation were allowed even without replica identity
after we define the publication for all tables. This would later lead to
an error on subscribers. The reason was that for such publications we were
not invalidating the relcache and the publication information for
relations was not getting rebuilt. Similarly, we were not invalidating the
relcache after dropping of such publications which will prohibit
Updates/Deletes without replica identity even without any publication.
Author: Vignesh C and Hou Zhijie
Reviewed-by: Hou Zhijie, Kyotaro Horiguchi, Amit Kapila
Backpatch-through: 10, where it was introduced
Discussion: https://postgr.es/m/CALDaNm0pF6zeWqCA8TCe2sDuwFAy8fCqba=nHampCKag-qLixg@mail.gmail.com
Modern POSIX seems to require strtod() to accept "-NaN", but there's
nothing about NaN in SUSv2, and some of our oldest buildfarm members
don't like it. Let's try writing it as -'NaN' instead; that seems
to produce the same result, at least on Intel hardware.
Per buildfarm.
The IEEE 754 standard allows a wide variety of bit patterns for NaNs,
of which at least two ("NaN" and "-NaN") are pretty easy to produce
from SQL on most machines. This is problematic because our btree
comparison functions deem all NaNs to be equal, but our float hash
functions know nothing about NaNs and will happily produce varying
hash codes for them. That causes unexpected results from queries
that hash a column containing different NaN values. It could also
produce unexpected lookup failures when using a hash index on a
float column, i.e. "WHERE x = 'NaN'" will not find all the rows
it should.
To fix, special-case NaN in the float hash functions, not too much
unlike the existing special case that forces zero and minus zero
to hash the same. I arranged for the most vanilla sort of NaN
(that coming from the C99 NAN constant) to still have the same
hash code as before, to reduce the risk to existing hash indexes.
I dithered about whether to back-patch this into stable branches,
but ultimately decided to do so. It's a clear improvement for
queries that hash internally. If there is anybody who has -NaN
in a hash index, they'd be well advised to re-index after applying
this patch ... but the misbehavior if they don't will not be much
worse than the misbehavior they had before.
Per bug #17172 from Ma Liangzhu.
Discussion: https://postgr.es/m/17172-7505bea9e04e230f@postgresql.org
Until now, when defining extended statistics, everything except a plain
column reference was treated as complex expression. So for example "a"
was a column reference, but "(a)" would be an expression. In most cases
this does not matter much, but there were a couple strange consequences.
For example
CREATE STATISTICS s ON a FROM t;
would fail, because extended stats require at least two columns. But
CREATE STATISTICS s ON (a) FROM t;
would succeed, because that requirement does not apply to expressions.
Moreover, that statistics object is useless - the optimizer will always
use the regular statistics collected for attribute "a".
So do a bit more work to identify those expressions referencing a single
column, and translate them to a simple column reference. Backpatch to
14, where support for extended statistics on expressions was introduced.
Reported-by: Justin Pryzby
Backpatch-through: 14
Discussion: https://postgr.es/m/20210816013255.GS10479%40telsasoft.com
The check to test whether the subscription workers were restarting after a
change in the subscription was failing. The reason was that the test was
assuming the walsender started before it reaches the 'streaming' state and
the walsender was exiting due to an error before that. Now, the walsender
was erroring out before reaching the 'streaming' state because it tries to
acquire the slot before the previous walsender has exited.
In passing, improve the die messages so that it is easier to investigate
the failures in the future if any.
Reported-by: Michael Paquier, as per buildfarm
Author: Ajin Cherian
Reviewed-by: Masahiko Sawada, Amit Kapila
Backpatch-through: 10, where this test was introduced
Discussion: https://postgr.es/m/YRnhFxa9bo73wfpV@paquier.xyz
This is useful to test for a command failure with some default
connection parameters associated to a node, in combination with checks
on error patterns expected. This routine will be used by an upcoming
future patch, but could be also plugged into some of the existing
tests.
Extracted from a larger patch by the same author.
Author: Ronan Dunklau
Discussion: https://postgr.es/m/5742739.ga3mSNWIix@aivenronan
The code printing expressions for extended statistics doubled the
parens, producing results like ((a+1)), which is unnecessary and not
consistent with how we print expressions elsewhere.
Fixed by tweaking the code to produce just a single set of parens.
Reported by Mark Dilger, fix by me. Backpatch to 14, where support for
extended statistics on expressions was added.
Reported-by: Mark Dilger
Discussion: https://postgr.es/m/20210122040101.GF27167%40telsasoft.com
Commit 5be8ce82e8 added a new role to the stats_ext regression suite,
but the role name did not start with regress_ causing failures when
running with ENFORCE_REGRESSION_TEST_NAME_RESTRICTIONS. Fixed by
renaming the role to start with the expected regress_ prefix.
Backpatch-through: 10, same as the new regression test
Discussion: https://postgr.es/m/1F238937-7CC2-4703-A1B1-6DC225B8978A%40enterprisedb.com
When an ownership check on extended statistics object failed, the code
was calling aclcheck_error_type to report the failure, which is clearly
wrong, resulting in cache lookup errors. Fix by calling aclcheck_error.
This issue exists since the introduction of extended statistics, so
backpatch all the way back to PostgreSQL 10. It went unnoticed because
there were no tests triggering the error, so add one.
Reported-by: Mark Dilger
Backpatch-through: 10, where extended stats were introduced
Discussion: https://postgr.es/m/1F238937-7CC2-4703-A1B1-6DC225B8978A%40enterprisedb.com
When starting to use a query parsetree loaded from the catalogs,
we must begin by applying AcquireRewriteLocks(), to obtain the same
relation locks that the parser would have gotten if the query were
entered interactively, and to do some other cleanup such as dealing
with later-dropped columns. New-style SQL functions are just as
subject to this rule as other stored parsetrees; however, of the
places dealing with such functions, only init_sql_fcache had gotten
the memo. In particular, if we successfully inlined a new-style
set-returning SQL function that contained any relation references,
we'd either get an assertion failure or attempt to use those
relation(s) sans locks.
I also added AcquireRewriteLocks calls to fmgr_sql_validator and
print_function_sqlbody. Desultory experiments didn't demonstrate any
failures in those, but I suspect that I just didn't try hard enough.
Certainly we don't expect nearby code paths to operate without locks.
On the same logic of it-ought-to-have-the-same-effects-as-the-old-code,
call pg_rewrite_query() in fmgr_sql_validator, too. It's possible
that neither code path there needs to bother with rewriting, but
doing the analysis to prove that is beyond my goals for today.
Per bug #17161 from Alexander Lakhin.
Discussion: https://postgr.es/m/17161-048a1cdff8422800@postgresql.org
Per our message style guidelines, for human consumption we quote
qualified names as a whole rather than each part separately; but commits
bc085205c8 introduced a deviation for extended statistics and
a4d75c86bf copied it. I don't agree with this policy applying to
names shown by psql, but that's a poor reason to deviate from the
practice only in two obscure corners, so make said corners use the same
style as everywhere else.
Backpatch to 14. The first of these is older, but I'm not sure we want
to destabilize the psql output in the older branches for such a small
thing.
Discussion: https://postgr.es/m/20210828181618.GS26465@telsasoft.com
If the system crashed between CREATE TABLESPACE and the next checkpoint,
the result could be some files in the tablespace unexpectedly containing
no rows. Affected files would be those for which the system did not
write WAL; see the wal_skip_threshold documentation. Before v13, a
different set of conditions governed the writing of WAL; see v12's
<sect2 id="populate-pitr">. (The v12 conditions were broader in some
ways and narrower in others.) Users may want to audit non-default
tablespaces for unexpected short files. The bug could have truncated an
index without affecting the associated table, and reindexing the index
would fix that particular problem.
This fixes the bug by making create_tablespace_directories() more like
TablespaceCreateDbspace(). create_tablespace_directories() was
recursively removing tablespace contents, reasoning that WAL redo would
recreate everything removed that way. That assumption holds for other
wal_level values. Under wal_level=minimal, the old approach could
delete files for which no other copy existed. Back-patch to 9.6 (all
supported versions).
Reviewed by Robert Haas and Prabhat Sahu. Reported by Robert Haas.
Discussion: https://postgr.es/m/CA+TgmoaLO9ncuwvr2nN-J4VEP5XyAcy=zKiHxQzBbFRxxGxm0w@mail.gmail.com
There are two identical error messages about valid value of modulus for
hash partition, in PostgreSQL source code. Commit 0e1275fb07 improved
only one of them so that ambiguous word "positive" was avoided there,
and forgot to improve the other. This commit improves the other.
Which would reduce translator burden.
Back-pach to v11 where the error message exists.
Author: Kyotaro Horiguchi
Reviewed-by: Fujii Masao
Discussion: https://postgr.es/m/20210819.170315.1413060634876301811.horikyota.ntt@gmail.com
Regexps like "(.){0}...\1" drew an "invalid backreference number".
That's not unreasonable on its face, since the capture group will
never be matched if it's iterated zero times. However, other engines
such as Perl's don't complain about this, nor do we throw an error for
related cases such as "(.)|\1", even though that backref can never
succeed either. Also, if the zero-iterations case happens at runtime
rather than compile time --- say, "(x)*...\1" when there's no "x" to
be found --- that's not an error, we just deem the backref to not
match. Making this even less defensible, no error was thrown for
nested cases such as "((.)){0}...\2"; and to add insult to injury,
those cases could result in assertion failures instead. (It seems
that nothing especially bad happened in non-assert builds, though.)
Let's just fix it so that no error is thrown and instead the backref
is deemed to never match, so that compile-time detection of no
iterations behaves the same as run-time detection.
Per report from Mark Dilger. This appears to be an aboriginal error
in Spencer's library, so back-patch to all supported versions.
Pre-v14, it turns out to also be necessary to back-patch one aspect of
commits cb76fbd7e/00116dee5, namely to create capture-node subREs with
the begin/end states of their subexpressions, not the current lp/rp
of the outer parseqatom invocation. Otherwise delsub complains that
we're trying to disconnect a state from itself. This is a bit scary
but code examination shows that it's safe: in the pre-v14 code, if we
want to wrap iteration around the subexpression, the first thing we do
is overwrite the atom's begin/end fields with new states. So the
bogus values didn't survive long enough to be used for anything, except
if no iteration is required, in which case it doesn't matter.
Discussion: https://postgr.es/m/A099E4A8-4377-4C64-A98C-3DEDDC075502@enterprisedb.com
The current refresh behavior tries to just refresh added/dropped
publications but that leads to removing wrong tables from subscription. We
can't refresh just the dropped publication because it is quite possible
that some of the tables are removed from publication by that time and now
those will remain as part of the subscription. Also, there is a chance
that the tables that were part of the publication being dropped are also
part of another publication, so we can't remove those.
So, we decided that by default, add/drop commands will also act like
REFRESH PUBLICATION which means they will refresh all the publications. We
can keep the old behavior for "add publication" but it is better to be
consistent with "drop publication".
Author: Hou Zhijie
Reviewed-by: Masahiko Sawada, Amit Kapila
Backpatch-through: 14, where it was introduced
Discussion: https://postgr.es/m/OS0PR01MB5716935D4C2CC85A6143073F94EF9@OS0PR01MB5716.jpnprd01.prod.outlook.com
The recursion in cdissect() was careless about clearing match data
for capturing parentheses after rejecting a partial match. This
could allow a later back-reference to succeed when by rights it
should fail for lack of a defined referent.
To fix, think a little more rigorously about what the contract
between different levels of cdissect's recursion needs to be.
With the right spec, we can fix this using fewer rather than more
resets of the match data; the key decision being that a failed
sub-match is now explicitly responsible for clearing any matches
it may have set.
There are enough other cross-checks and optimizations in the code
that it's not especially easy to exhibit this problem; usually, the
match will fail as-expected. Plus, regexps that are even potentially
vulnerable are most likely user errors, since there's just not much
point in writing a back-ref that doesn't always have a referent.
These facts perhaps explain why the issue hasn't been detected,
even though it's almost certainly a couple of decades old.
Discussion: https://postgr.es/m/151435.1629733387@sss.pgh.pa.us
We've supported parallel aggregation since e06a38965. At the time, we
didn't quite get around to also adding parallel DISTINCT. So, let's do
that now.
This is implemented by introducing a two-phase DISTINCT. Phase 1 is
performed on parallel workers, rows are made distinct there either by
hashing or by sort/unique. The results from the parallel workers are
combined and the final distinct phase is performed serially to get rid of
any duplicate rows that appear due to combining rows for each of the
parallel workers.
Author: David Rowley
Reviewed-by: Zhihong Yu
Discussion: https://postgr.es/m/CAApHDvrjRxVKwQN0he79xS+9wyotFXL=RmoWqGGO2N45Farpgw@mail.gmail.com
transformLockingClause neglected to exclude the pseudo-RTEs for
OLD/NEW when processing a rule's query. This led to odd errors
or even crashes later on. This bug is very ancient, but it's
not terribly surprising that nobody noticed, since the use-case
for SELECT FOR UPDATE in a non-view rule is somewhere between
thin and non-existent. Still, crashing is not OK.
Per bug #17151 from Zhiyong Wu. Thanks to Masahiko Sawada
for analysis of the problem.
Discussion: https://postgr.es/m/17151-c03a3e6e4ec9aadb@postgresql.org
Recursion into the FILTER clause was mis-implemented, such that a
relevant Var or Aggref at the very top of the FILTER clause would
be ignored. (Of course, that'd have to be a plain boolean Var or
boolean-returning aggregate.) The consequence would be
mis-identification of the correct semantic level of the aggregate,
which could lead to not-per-spec query behavior. If the FILTER
expression is an aggregate, this could also lead to failure to issue
an expected "aggregate function calls cannot be nested" error, which
would likely result in a core dump later on, since the planner and
executor aren't expecting such cases to appear.
The root cause is that commit b560ec1b0 blindly copied some code
that assumed it's recursing into a List, and thus didn't examine the
top-level node. To forestall questions about why this call doesn't
look like the others, as well as possible future copy-and-paste
mistakes, let's change all three check_agg_arguments_walker calls in
check_agg_arguments, even though only the one for the filter clause
is really broken.
Per bug #17152 from Zhiyong Wu. This has been wrong since we
implemented FILTER, so back-patch to all supported versions.
(Testing suggests that pre-v11 branches manage to avoid crashing
in the bad-Aggref case, thanks to "redundant" checks in ExecInitAgg.
But I'm not sure how thorough that protection is, and anyway the
wrong-behavior issue remains, so fix 9.6 and 10 too.)
Discussion: https://postgr.es/m/17152-c7f906cc1a88e61b@postgresql.org
I was overoptimistic to assume that UTF8-based locales would all
consider U+1500 to be a member of the [[:alpha:]] char class.
Tweak the test cases added by commit 78a843f11 to avoid that
assumption. We might need to lobotomize them further, but this
should be enough to fix the early buildfarm reports.
The functions moveins(), copyins(), moveouts(), copyouts() are
required to preserve the invariant that there are no duplicate arcs in
the regex's NFA. Spencer's original implementation of them was O(N^2)
since it checked separately for a match to each source arc. In commit
579840ca0 I improved that by adding sort/merge logic to be used if
more than a few arcs are to be moved/copied. However, I now realize
that that missed a bet. At many call sites, the target state is newly
made and cannot have any existing in-arcs (respectively out-arcs)
that could be duplicates. So spending any cycles at all on checking
for duplicates is wasted effort; in these cases we can just blindly
move/copy all the source arcs. Add code paths to do that.
It turns out that for copyins()/copyouts(), *all* the call sites have
this property, making all the "improved" logic in them flat out
unreachable. Perhaps we'll need the full capability again someday,
so I just #ifdef'd those paths out rather than removing them entirely.
In passing, add a few test cases to improve code coverage in this
area as well as in regc_locale.c/regc_pg_locale.c.
Discussion: https://postgr.es/m/810272.1629064063@sss.pgh.pa.us
If the replacement string doesn't contain \1...\9, then we don't
need sub-match locations, so we can use the REG_NOSUB optimization
here too. There's already a pre-scan of the replacement string
to look for backslashes, so extend that to check for digits, and
refactor to allow that to happen before we compile the regexp.
While at it, try to speed up the pre-scan by using memchr() instead
of a handwritten loop. It's likely that this is lost in the noise
compared to the regexp processing proper, but maybe not. In any
case, this coding is shorter.
Also, add some test cases to improve the poor coverage of
appendStringInfoRegexpSubstr().
Discussion: https://postgr.es/m/3534632.1628536485@sss.pgh.pa.us
Identifying the precise match locations for parenthesized subexpressions
is a fairly expensive task given the way our regexp engine works, both
at regexp compile time (where we must create an optimized NFA for each
parenthesized subexpression) and at runtime (where determining exact
match locations requires laborious search).
Up to now we've made little attempt to optimize this situation. This
patch identifies cases where we know at compile time that we won't
need to know subexpression match locations, and teaches the regexp
compiler to not bother creating per-subexpression regexps for
parenthesis pairs that are not referenced by backrefs elsewhere in
the regexp. (To preserve semantics, we obviously still have to
pin down the match locations of backref references.) Users could
have obtained the same results before this by being careful to
write "non capturing" parentheses wherever possible, but few people
bother with that.
Discussion: https://postgr.es/m/2219936.1628115334@sss.pgh.pa.us
Commit cebc1d34e taught parseqatom() to optimize cases where a branch
contains only one, "messy", atom by getting rid of excess subRE nodes.
The way we really should do that is to keep the subRE built for the
"messy" child atom; but to avoid changing parseqatom's nominal API,
I made it delete that node after copying its fields to the outer subRE
made by parsebranch(). It seems that that actually worked at the time;
but it became dangerous after ea1268f63, because that later commit
allowed the lower invocation of parse() to return a subRE that was also
pointed to by some v->subs[] entry. This meant we could wind up with a
dangling pointer in v->subs[], allowing a later backref to misbehave,
but only if that subRE struct had been reused in between. So the damage
seems confined to cases like '((...))...(...\2'.
To fix, do what I should have done before and modify parseqatom's API
to make it possible for it to remove the caller's subRE instead of the
callee's. That's safer because we know that subRE isn't complete yet,
so noplace else will have a pointer to it.
Per report from Mark Dilger. Back-patch to v14 where the problematic
patches came in.
Discussion: https://postgr.es/m/0203588E-E609-43AF-9F4F-902854231EE7@enterprisedb.com
Rather than trying to pick table aliases that won't conflict with
any possible user-defined matview column name, adjust the queries'
syntax so that the aliases are only used in places where they can't be
mistaken for column names. Mostly this consists of writing "alias.*"
not just "alias", which adds clarity for humans as well as machines.
We do have the issue that "SELECT alias.*" acts differently from
"SELECT alias", but we can use the same hack ruleutils.c uses for
whole-row variables in SELECT lists: write "alias.*::compositetype".
We might as well revert to the original aliases after doing this;
they're a bit easier to read.
Like 75d66d10e, back-patch to all supported branches.
Discussion: https://postgr.es/m/2488325.1628261320@sss.pgh.pa.us
Casting a value that's already of a type with a specific typmod
to an unspecified typmod doesn't do anything so far as run-time
behavior is concerned. However, it really ought to change the
exposed type of the expression to match. Up to now,
coerce_type_typmod hasn't bothered with that, which creates gotchas
in contexts such as recursive unions. If for example one side of
the union is numeric(18,3), but it needs to be plain numeric to
match the other side, there's no direct way to express that.
This is easy enough to fix, by inserting a RelabelType to update the
exposed type of the expression. However, it's a bit nervous-making
to change this behavior, because it's stood for a really long time.
(I strongly suspect that it's like this in part because the logic
pre-dates the introduction of RelabelType in 7.0. The commit log
message for 57b30e8e2 is interesting reading here.) As a compromise,
we'll sneak the change into 14beta3, and consider back-patching to
stable branches if no complaints emerge in the next three months.
Discussion: https://postgr.es/m/CABNQVagu3bZGqiTjb31a8D5Od3fUMs7Oh3gmZMQZVHZ=uWWWfQ@mail.gmail.com
Formerly, the numeric code tested whether an integer value of a larger
type would fit in a smaller type by casting it to the smaller type and
then testing if the reverse conversion produced the original value.
That's perfectly fine, except that it caused a test failure on
buildfarm animal castoroides, most likely due to a compiler bug.
Instead, do these tests by comparing against PG_INT16/32_MIN/MAX. That
matches existing code in other places, such as int84(), which is more
widely tested, and so is less likely to go wrong.
While at it, add regression tests covering the numeric-to-int8/4/2
conversions, and adjust the recently added tests to the style of
434ddfb79a (on the v11 branch) to make failures easier to diagnose.
Per buildfarm via Tom Lane, reviewed by Tom Lane.
Discussion: https://postgr.es/m/2394813.1628179479%40sss.pgh.pa.us
This fixes a long-standing bug when using to_char() to format a
numeric value in scientific notation -- if the value's exponent is
less than -NUMERIC_MAX_DISPLAY_SCALE-1 (-1001), it produced a
division-by-zero error.
The reason for this error was that get_str_from_var_sci() divides its
input by 10^exp, which it produced using power_var_int(). However, the
underflow test in power_var_int() causes it to return zero if the
result scale is too small. That's not a problem for power_var_int()'s
only other caller, power_var(), since that limits the rscale to 1000,
but in get_str_from_var_sci() the exponent can be much smaller,
requiring a much larger rscale. Fix by introducing a new function to
compute 10^exp directly, with no rscale limit. This also allows 10^exp
to be computed more efficiently, without any numeric multiplication,
division or rounding.
Discussion: https://postgr.es/m/CAEZATCWhojfH4whaqgUKBe8D5jNHB8ytzemL-PnRx+KCTyMXmg@mail.gmail.com
Commit a8fd13cab0 added support for prepared transactions to built-in
logical replication via a new option "two_phase" for a subscription. The
"two_phase" option was not allowed with the existing streaming option.
This commit permits the combination of "streaming" and "two_phase"
subscription options. It extends the pgoutput plugin and the subscriber
side code to add the prepare API for streaming transactions which will
apply the changes accumulated in the spool-file at prepare time.
Author: Peter Smith and Ajin Cherian
Reviewed-by: Vignesh C, Amit Kapila, Greg Nancarrow
Tested-By: Haiying Tang
Discussion: https://postgr.es/m/02DA5F5E-CECE-4D9C-8B4B-418077E2C010@postgrespro.ru
Discussion: https://postgr.es/m/CAMGcDxeqEpWj3fTXwqhSwBdXd2RS9jzwWscO-XbeCfso6ts3+Q@mail.gmail.com
This patch adds new functions regexp_count(), regexp_instr(),
regexp_like(), and regexp_substr(), and extends regexp_replace()
with some new optional arguments. All these functions follow
the definitions used in Oracle, although there are small differences
in the regexp language due to using our own regexp engine -- most
notably, that the default newline-matching behavior is different.
Similar functions appear in DB2 and elsewhere, too. Aside from
easing portability, these functions are easier to use for certain
tasks than our existing regexp_match[es] functions.
Gilles Darold, heavily revised by me
Discussion: https://postgr.es/m/fc160ee0-c843-b024-29bb-97b5da61971f@darold.net
959d00e9d added the ability to make use of an Append node instead of a
MergeAppend when we wanted to perform a scan of a partitioned table and
the required sort order was the same as the partitioned keys and the
partitioned table was defined in such a way that earlier partitions were
guaranteed to only contain lower-order values than later partitions.
However, previously we didn't allow these ordered partition scans for
LIST partitioned table when there were any partitions that allowed
multiple Datums. This was a very cheap check to make and we could likely
have done a little better by checking if there were interleaved
partitions, but at the time we didn't have visibility about which
partitions were pruned, so we still may have disallowed cases where all
interleaved partitions were pruned.
Since 475dbd0b7, we now have knowledge of pruned partitions, we can do a
much better job inside partitions_are_ordered().
Here we pass which partitions survived partition pruning into
partitions_are_ordered() and, for LIST partitioning, have it check to see
if any live partitions exist that are also in the new "interleaved_parts"
field defined in PartitionBoundInfo.
For RANGE partitioning we can relax the code which caused the partitions
to be unordered if a DEFAULT partition existed. Since we now know which
partitions were pruned, partitions_are_ordered() now returns true when the
DEFAULT partition was pruned.
Reviewed-by: Amit Langote, Zhihong Yu
Discussion: https://postgr.es/m/CAApHDvrdoN_sXU52i=QDXe2k3WAo=EVry29r2+Tq2WYcn2xhEA@mail.gmail.com
The test is expecting two prepared transactions corresponding to two
subscriptions but it waits to catch up for just one subscription. Fix it
by allowing to wait for both subscriptions.
Reported-by: Michael Paquier, as per buildfarm
Author: Ajin Cherian
Reviewed-By: Amit Kapila, Vignesh C, Peter Smith
Discussion: https://postgr.es/m/CAA4eK1+_0iNQ8Z=KVTjmmAqNX-hyv+1+fnZ-Yx8CVP=uAcekqw@mail.gmail.com
This fixes a couple of related problems that arise when raising
numbers to very large powers.
Firstly, when raising a negative number to a very large integer power,
the result should be well-defined, but the previous code would only
cope if the exponent was small enough to go through power_var_int().
Otherwise it would throw an internal error, attempting to take the
logarithm of a negative number. Fix this by adding suitable handling
to the general case in power_var() to cope with negative bases,
checking for integer powers there.
Next, when raising a (positive or negative) number whose absolute
value is slightly less than 1 to a very large power, the result should
approach zero as the power is increased. However, in some cases, for
sufficiently large powers, this would lose all precision and return 1
instead of 0. This was due to the way that the local_rscale was being
calculated for the final full-precision calculation:
local_rscale = rscale + (int) val - ln_dweight + 8
The first two terms on the right hand side are meant to give the
number of significant digits required in the result ("val" being the
estimated result weight). However, this failed to account for the fact
that rscale is clipped to a maximum of NUMERIC_MAX_DISPLAY_SCALE
(1000), and the result weight might be less then -1000, causing their
sum to be negative, leading to a loss of precision. Fix this by
forcing the number of significant digits calculated to be nonnegative.
It's OK for it to be zero (when the result weight is less than -1000),
since the local_rscale value then includes a few extra digits to
ensure an accurate result.
Finally, add additional underflow checks to exp_var() and power_var(),
so that they consistently return zero for cases like this where the
result is indistinguishable from zero. Some paths through this code
already returned zero in such cases, but others were throwing overflow
errors.
Dean Rasheed, reviewed by Yugo Nagata.
Discussion: http://postgr.es/m/CAEZATCW6Dvq7+3wN3tt5jLj-FyOcUgT5xNoOqce5=6Su0bCR0w@mail.gmail.com
Buildfarm shows that this test has a further failure mode when a
checkpoint starts earlier than expected, so we detect a "checkpoint
completed" line that's not the one we want. Change the config to try
and prevent this.
Per buildfarm
While at it, update one comment that was forgotten in commit
d18e75664a.
Author: Kyotaro Horiguchi <horikyota.ntt@gmail.com>
Discussion: https://postgr.es/m/20210729.162038.534808353849568395.horikyota.ntt@gmail.com
Sometimes cygpath has been observed to return a path with a trailing
slash. That can cause problems, Also, make "cygpath" usage
consistent with "pwd -W" with respect to the use of forward slashes.
Backpatch to release 14 where the current code was introduced.
The clientside log saved from the testrun was removed in 1caef31d9
but the entry in the .gitignore file remained. While this exists
in older branches as well, it's mostly a cosmetical fix so no back-
patching is done.
Reviewed-by: Michael Paquier
Discussion: https://postgr.es/m/F8E73040-BB6F-43BF-95B4-3CEC037BE856@yesql.se
There is only one constructor now for PostgresNode, with the idiomatic
name 'new'. The method is not exported by the class, and must be called
as "PostgresNode->new('name',[args])". All the TAP tests that use
PostgresNode are modified accordingly. Third party scripts will need
adjusting, which is a fairly mechanical process (I just used a sed
script).
This method will modify or delete an existing line in the config file
rather than simply appending to the file. This makes adjustment of files
for older versions much simpler and more compact.
This is now the default for pg_ctl, but having the flag here explicitly
does no harm and helps with backwards compatibility of the PostgresNode
module.
The logic used to support a change of access method for a table is
similar to changes for tablespace or relation persistence, requiring a
table rewrite with an exclusive lock of the relation changed. Table
rewrites done in ALTER TABLE already go through the table AM layer when
scanning tuples from the old relation and inserting them into the new
one, making this implementation straight-forward.
Note that partitioned tables are not supported as these have no access
methods defined.
Author: Justin Pryzby, Jeff Davis
Reviewed-by: Michael Paquier, Vignesh C
Discussion: https://postgr.es/m/20210228222530.GD20769@telsasoft.com
We failed to deal with an UNKNOWN-type input for
anycompatiblemultirange; that should throw an error indicating
that we don't know how to resolve the multirange type.
We also failed to infer the type of an anycompatiblerange output
from an anycompatiblemultirange input or vice versa.
Per bug #17066 from Alexander Lakhin. Back-patch to v14
where multiranges were added.
Discussion: https://postgr.es/m/17066-16a37f6223a8470b@postgresql.org
Commit 48c5c9068 failed to allow for buildfarm animals that
force jit = on. I'm surprised that this hasn't come up
elsewhere in explain.sql, so turn it off for that whole
test script not just the one new test case.
Per buildfarm.
The error messages using the word "non-negative" are confusing
because it's ambiguous about whether it accepts zero or not.
This commit improves those error messages by replacing it with
less ambiguous word like "greater than zero" or
"greater than or equal to zero".
Also this commit added the note about the word "non-negative" to
the error message style guide, to help writing the new error messages.
When postgres_fdw option fetch_size was set to zero, previously
the error message "fetch_size requires a non-negative integer value"
was reported. This error message was outright buggy. Therefore
back-patch to all supported versions where such buggy error message
could be thrown.
Reported-by: Hou Zhijie
Author: Bharath Rupireddy
Reviewed-by: Kyotaro Horiguchi, Fujii Masao
Discussion: https://postgr.es/m/OS0PR01MB5716415335A06B489F1B3A8194569@OS0PR01MB5716.jpnprd01.prod.outlook.com
This patch causes EXPLAIN output to refer to objects that are in
the current session's temp schema with the "pg_temp" schema alias
rather than that schema's actual name. This is useful for our own
testing purposes since it will stabilize EXPLAIN VERBOSE output
for such cases, allowing us to use that in regression tests.
It should be less confusing for end users too.
Since ruleutils.c needs to change behavior for this, the change
also leaks into a few other users of ruleutils.c, for example
pg_get_viewdef(). AFAICS that won't cause any problems.
We did find that aggressively trying to change this behavior
across-the-board would cause issues, but as long as "pg_temp"
only appears within generated SQL text, I think it'll be fine.
Along the way, make get_namespace_name_or_temp conform to the
same API as get_namespace_name, ie that it returns a palloc'd
string or NULL. The current behavior hasn't caused any bugs
since no callers attempt to pfree the result, but if it gets
more widespread usage that could become a problem.
Amul Sul, reviewed and extended by me
Discussion: https://postgr.es/m/CAAJ_b97W=QaGmag9AhWNbmx3uEYsNkXWL+OVW1_E1D3BtgWvtw@mail.gmail.com
Commit ad600bba04 added psql command \dX listing extended statistics
objects, but it failed to consider search_path when selecting the
elements so some of the returned elements might be invisible.
The visibility was already considered for tab completion (added by
commit d99d58cdc8), so adding it to the query is fairly simple.
Reported and fix by Justin Pryzby, regression tests by me. Backpatch
to PostgreSQL 14, where \dX was introduced.
Batchpatch-through: 14
Author: Justin Pryzby
Reviewed-by: Tatsuro Yamada
Discussion: https://postgr.es/m/c027a541-5856-75a5-0868-341301e1624b%40nttcom.co.jp_1
Formerly, when specifying NUMERIC(precision, scale), the scale had to
be in the range [0, precision], which was per SQL spec. This commit
extends the range of allowed scales to [-1000, 1000], independent of
the precision (whose valid range remains [1, 1000]).
A negative scale implies rounding before the decimal point. For
example, a column might be declared with a scale of -3 to round values
to the nearest thousand. Note that the display scale remains
non-negative, so in this case the display scale will be zero, and all
digits before the decimal point will be displayed.
A scale greater than the precision supports fractional values with
zeros immediately after the decimal point.
Take the opportunity to tidy up the code that packs, unpacks and
validates the contents of a typmod integer, encapsulating it in a
small set of new inline functions.
Bump the catversion because the allowed contents of atttypmod have
changed for numeric columns. This isn't a change that requires a
re-initdb, but negative scale values in the typmod would confuse old
backends.
Dean Rasheed, with additional improvements by Tom Lane. Reviewed by
Tom Lane.
Discussion: https://postgr.es/m/CAEZATCWdNLgpKihmURF8nfofP0RFtAKJ7ktY6GcZOPnMfUoRqA@mail.gmail.com
We have an implementation restriction that PREPARE TRANSACTION can't
handle cases where both session-lifespan and transaction-lifespan locks
are held on the same lockable object. (That's because we'd otherwise
need to acquire a new PROCLOCK entry during post-prepare cleanup, which
is an operation that might fail. The situation can only arise with odd
usages of advisory locks, so removing the restriction is probably not
worth the amount of effort it would take.) AtPrepare_Locks attempted
to enforce this, but its logic was many bricks shy of a load, because
it only detected cases where the session and transaction locks had the
same lockmode. Locks of different modes on the same object would lead
to the rather unhelpful message "PANIC: we seem to have dropped a bit
somewhere".
To fix, build a transient hashtable with one entry per locktag,
not one per locktag + mode, and use that to detect conflicts.
Per bug #17122 from Alexander Pyhalov. This bug is ancient,
so back-patch to all supported branches.
Discussion: https://postgr.es/m/17122-04f3c32098a62233@postgresql.org
Animals running in Czech locale failed. I could try to find table names
that don't have this problem, but it seems simpler to just use the C
locale.
Per buildfarm
Renaming triggers on partitioned tables had two problems: first,
it did not recurse to renaming the triggers on the partitions; and
second, it failed to prohibit renaming clone triggers. Having triggers
with different names in partitions is pointless, and furthermore pg_dump
would not preserve names for partitions anyway.
Not backpatched -- making the ALTER TRIGGER throw an error in stable
versions might cause problems for existing scripts.
Co-authored-by: Arne Roland <A.Roland@index.de>
Co-authored-by: Álvaro Herrera <alvherre@alvh.no-ip.org>
Reviewed-by: Zhihong Yu <zyu@yugabyte.com>
Discussion: https://postgr.es/m/d0fd7040c2fb4de1a111b9d9ccc456b8@index.de
Follow-up to 2ed532ee8c, a few error
messages in the logical replication area currently only deal with
tables, but if we're anticipating more relkinds such as sequences
being handled, then these messages also fall into the category
affected by the previous patch, so adjust them too.
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://www.postgresql.org/message-id/c9ba5c6a-4bd5-e12c-1b3c-edbcaedbf392@enterprisedb.com
We don't allow to create replication slot_name as an empty string ('') via
SQL API pg_create_logical_replication_slot() but it is allowed to be set
via Alter Subscription command. This will lead to apply worker repeatedly
keep trying to stream data via slot_name '' and the user is not allowed to
create the slot with that name.
Author: Japin Li
Reviewed-By: Ranier Vilela, Amit Kapila
Backpatch-through: 10, where it was introduced
Discussion: https://postgr.es/m/MEYP282MB1669CBD98E721C77CA696499B61A9@MEYP282MB1669.AUSP282.PROD.OUTLOOK.COM
Thomas Munro
Michael Paquier
Peter Geoghegan
Tom Lane
Daniel Gustafsson
Fujii Masao
Noah Misch
Peter Eisentraut
Andres Freund
Andrew Dunstan
Robert Haas
Tomas Vondra
Jeff Davis
Bruce Momjian
Alvaro Herrera
John Naylor
Alexander Korotkov
Amit Kapila
David Rowley
Heikki Linnakangas
Dean Rasheed