Tom Lane [Mon, 3 Jun 2019 22:06:04 +0000 (18:06 -0400)]
Fix contrib/auto_explain to not cause problems in parallel workers.
A parallel worker process should not be making any decisions of its
own about whether to auto-explain. If the parent session process
passed down flags asking for instrumentation data, do that, otherwise
not. Trying to enable instrumentation anyway leads to bugs like the
"could not find key N in shm TOC" failure reported in bug #15821
from Christian Hofstaedtler.
We can implement this cheaply by piggybacking on the existing logic
for not doing anything when we've chosen not to sample a statement.
While at it, clean up some tin-eared coding related to the sampling
feature, including an off-by-one error that meant that asking for 1.0
sampling rate didn't actually result in sampling every statement.
Although the specific case reported here only manifested in >= v11,
I believe that related misbehaviors can be demonstrated in any version
that has parallel query; and the off-by-one error is certainly there
back to 9.6 where that feature was added. So back-patch to 9.6.
Tom Lane [Mon, 3 Jun 2019 20:59:16 +0000 (16:59 -0400)]
Fix unsafe memory management in CloneRowTriggersToPartition().
It's not really supported to call systable_getnext() in a different
memory context than systable_beginscan() was called in, and it's
*definitely* not safe to do so and then reset that context between
calls. I'm not very clear on how this code survived
CLOBBER_CACHE_ALWAYS testing ... but Alexander Lakhin found a case
that would crash it pretty reliably.
Per bug #15828. Fix, and backpatch to v11 where this code came in.
Michael Paquier [Mon, 3 Jun 2019 02:02:32 +0000 (11:02 +0900)]
Fix some issues and improve psql completion for access methods
The following issues have been spotted:
- CREATE INDEX .. USING suggests both index and table AMs, but it should
consider only index AMs.
- CREATE TABLE .. USING has no completion support. USING was not being
included in the completion list where it should, and follow-up
suggestions for table AMs have been missing as well.
- CREATE ACCESS METHOD .. TYPE suggests only INDEX, with TABLE missing.
Author: Michael Paquier
Discussion: https://postgr.es/m/20190601191007.GC1905@paquier.xyz
Tom Lane [Sun, 2 Jun 2019 17:45:01 +0000 (13:45 -0400)]
Make cpluspluscheck more portable.
Teach it to scrape -I and -D switches from CPPFLAGS in Makefile.global.
This is useful for testing on, eg, FreeBSD, where you won't get far
without "-I/usr/local/include".
Also, expand the set of blacklisted-for-unportability atomics headers,
based on noting that arch-x86.h fails to compile on an ARM box. The
other ones I'd omitted seem to compile all right on architectures they
don't belong to, but that's surely too shaky to rely on. Let's do
like we did for the src/include/port/ headers, and ignore all except
the variant that's pulled in by the arch-independent header.
There was lots not to like about the way we dealt with this before:
1. Instead of taking care of the conflict centrally in plperl.h, we
expected every one of its ever-growing number of includers to do so.
This is duplicative and error-prone in itself, plus it means that
plperl.h fails to meet the expectation of being compilable standalone,
resulting in macro-redefinition warnings in cpluspluscheck.
2. We left _() with its Perl definition, meaning that if someone tried
to use it in any Perl-related extension, it would silently fail to
provide run-time translation. I don't see any live bugs of this ilk,
but it's clearly a hard-to-notice bug waiting to happen.
So fix that by centralizing the cleanup logic, making it match what
we're already doing for other macro conflicts with Perl. Since we only
expect plperl.h to be included by extensions not core code, we should
redefine _() as dgettext() not gettext().
Tom Lane [Sun, 2 Jun 2019 15:07:54 +0000 (11:07 -0400)]
Un-break ecpg tests for Windows.
Declaring a function "inline" still doesn't work with Windows compilers
(C99? what's that?), unless the macro provided by pg_config.h is
in-scope, which it is not in our ECPG test programs. So the workaround
I tried to use in commit 7640f9312 doesn't work for Windows. Revert
the change in printf_hack.h, and instead just blacklist that file
in cpluspluscheck --- since it's a not-installed test file, we don't
really need to verify its C++ cleanliness anyway.
Alvaro Herrera [Sun, 2 Jun 2019 04:29:49 +0000 (00:29 -0400)]
Increase test coverage for worker_spi by ∞%
This test module was not getting invoked, other than at compile time,
limiting its usefulness -- and keeping its coverage at 0%. Add a
minimal regression test to ensure it runs on make check-world; this
makes it 92% covered (line-wise), which seems sufficient.
Author: Álvaro Herrera <alvherre@alvh.no-ip.org> Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/20190529193256.GA17603@alvherre.pgsql
Michael Paquier [Sat, 1 Jun 2019 19:33:47 +0000 (15:33 -0400)]
Fix documentation of check_option in information_schema.views
Support of CHECK OPTION for updatable views has been added in 9.4, but
the documentation of information_schema never got the call even if the
information displayed is correct.
Tom Lane [Fri, 31 May 2019 20:32:07 +0000 (16:32 -0400)]
Improve coverage of cpluspluscheck.
Formerly, cpluspluscheck was only meant to examine headers that
we thought of as exported --- but its notion of what we export
was well behind the times. Let's just make it check *all* .h
files, except for a well-defined blacklist, instead.
While at it, improve its ability to use a C++ compiler other than g++,
by scraping the CXX setting from Makefile.global and making it possible
to override the warning options used (per suggestion from Andres Freund).
Andres Freund [Fri, 31 May 2019 19:36:17 +0000 (12:36 -0700)]
Integrate cpluspluscheck into build system.
Previously cpluspluscheck wouldn't work in vpath builds, this commit
fixes that. To make it easier to invoke, there's a top-level
cpluspluscheck target.
Tom Lane [Fri, 31 May 2019 15:45:33 +0000 (11:45 -0400)]
Fix assorted header files that failed to compile standalone.
We have a longstanding project convention that all .h files should
be includable with no prerequisites other than postgres.h. This is
tested/relied-on by cpluspluscheck. However, cpluspluscheck has not
historically been applied to most headers outside the src/include
tree, with the predictable consequence that some of them don't work.
Fix that, usually by adding missing #include dependencies.
The change in printf_hack.h might require some explanation: without
it, my C++ compiler whines that the function is unused. There's
not so many call sites that "inline" is going to cost much, and
besides all the callers are in test code that we really don't care
about the size of.
There's no actual bugs being fixed here, so I see no need to back-patch.
Tom Lane [Fri, 31 May 2019 14:40:00 +0000 (10:40 -0400)]
Make our perfect hash functions be valid C++.
While C is happy to cast "const void *" to "const unsigned char *"
silently, C++ insists on an explicit cast. Since we put these
functions into header files, cpluspluscheck whines about that.
Add the cast to pacify it.
Michael Paquier [Thu, 30 May 2019 20:58:17 +0000 (16:58 -0400)]
Rework options of pg_checksums options for filenode handling
This makes the tool consistent with the option set of oid2name, which
has been historically using -f for filenodes, and has more recently
gained long options and --filenode via 1aaf532.
Reported-by: Peter Eisentraut
Author: Fabien Coelho
Discussion: https://postgr.es/m/97045260-fb9e-e145-a950-cf7d28c4eaea@2ndquadrant.com
Interestingly only C++ compilers have, so far, complained about this
odd forward declaration. This originated when IndexBuildCallback was
defined in another file, but now is completely unnecessary (but was
wrong before too, cpluspluscheck just wouldn't have noticed).
Reported-By: Tom Lane
Discussion: https://postgr.es/m/53941.1559239260@sss.pgh.pa.us
Tomas Vondra [Thu, 30 May 2019 14:16:12 +0000 (16:16 +0200)]
Make error logging in extended statistics more consistent
Most errors reported in extended statistics are internal issues, and so
should use elog(). The MCV list code was already following this rule, but
the functional dependencies and ndistinct coefficients were using a mix
of elog() and ereport(). Fix this by changing most places to elog(), with
the exception of input functions.
This is a mostly cosmetic change, it makes the life a little bit easier
for translators, as elog() messages are not translated. So backpatch to
PostgreSQL 10, where extended statistics were introduced.
Author: Tomas Vondra
Backpatch-through: 10 where extended statistics were added
Discussion: https://postgr.es/m/20190503154404.GA7478@alvherre.pgsql
Michael Paquier [Wed, 29 May 2019 15:19:06 +0000 (11:19 -0400)]
Fix some documentation about FKs and partitioned tables
This got forgotten in f56f8f which has added foreign key support for
partitioned tables. In passing, add a mention about caveats applying to
tables partitioned using inheritance regarding indexes and foreign keys.
Author: Paul A Jungwirth Reviewed-by: Amit Langote, Michael Paquier
Discussion: https://postgr.es/m/CA+renyUuSmYgmZjKc_DfUNVZ0uttF91-FwhDVW3F7WEPj0jL5w@mail.gmail.com
Noah Misch [Tue, 28 May 2019 19:59:00 +0000 (12:59 -0700)]
In the pg_upgrade test suite, don't write to src/test/regress.
When this suite runs installcheck, redirect file creations from
src/test/regress to src/bin/pg_upgrade/tmp_check/regress. This closes a
race condition in "make -j check-world". If the pg_upgrade suite wrote
to a given src/test/regress/results file in parallel with the regular
src/test/regress invocation writing it, a test failed spuriously. Even
without parallelism, in "make -k check-world", the suite finishing
second overwrote the other's regression.diffs. This revealed test
"largeobject" assuming @abs_builddir@ is getcwd(), so fix that, too.
Buildfarm client REL_10, released fifty-four days ago, supports saving
regression.diffs from its new location. When an older client reports a
pg_upgradeCheck failure, it will no longer include regression.diffs.
Back-patch to 9.5, where pg_upgrade moved to src/bin.
Noah Misch [Tue, 28 May 2019 19:58:30 +0000 (12:58 -0700)]
In the pg_upgrade test suite, remove and recreate "tmp_check".
This allows "vcregress upgradecheck" to pass twice in immediate
succession, and it's more like how $(prove_check) works. Back-patch to
9.5, where pg_upgrade moved to src/bin.
Tom Lane [Sun, 26 May 2019 14:39:11 +0000 (10:39 -0400)]
Fix more thinkos in new ECPG "PREPARE AS" code.
ecpg_build_params() failed to check for ecpg_alloc failure in one
newly-added code path, and leaked a temporary string in another path.
Errors in commit a1dc6ab46, spotted by Coverity.
Tom Lane [Sun, 26 May 2019 14:06:37 +0000 (10:06 -0400)]
Fix thinko in new ECPG "PREPARE AS" code.
ecpg_register_prepared_stmt() is pretty obviously checking the wrong
variable while trying to detect malloc failure. Error in commit a1dc6ab46, spotted by Coverity.
Amit Kapila [Sun, 26 May 2019 12:58:18 +0000 (18:28 +0530)]
Fix typos.
Reported-by: Alexander Lakhin
Author: Alexander Lakhin Reviewed-by: Amit Kapila and Tom Lane
Discussion: https://postgr.es/m/7208de98-add8-8537-91c0-f8b089e2928c@gmail.com
Andres Freund [Thu, 23 May 2019 23:25:48 +0000 (16:25 -0700)]
tableam: Rename wrapper functions to match callback names.
Some of the wrapper functions didn't match the callback names. Many of
them due to staying "consistent" with historic naming of the wrapped
functionality. We decided that for most cases it's more important to
be for tableam to be consistent going forward, than with the past.
The one exception is beginscan/endscan/... because it'd have looked
odd to have systable_beginscan/endscan/... with a different naming
scheme, and changing the systable_* APIs would have caused way too
much churn (including breaking a lot of external users).
Author: Ashwin Agrawal, with some small additions by Andres Freund Reviewed-By: Andres Freund
Discussion: https://postgr.es/m/CALfoeiugyrXZfX7n0ORCa4L-m834dzmaE8eFdbNR6PMpetU4Ww@mail.gmail.com
Michael Paquier [Thu, 23 May 2019 23:19:21 +0000 (08:19 +0900)]
Fix table dump in pg_dump[all] with backends older than 9.5
The access method name "amname" can be dumped as of 3b925e90, but
queries for backends older than 9.5 forgot to map it to a dummy NULL
value, causing the column to not be mapped to a number. As a result,
pg_dump was throwing some spurious errors in its stderr output coming
from libpq:
pg_dump: column number -1 is out of range 0..36
Fix this issue by adding a mapping of "amname" to NULL to all the older
queries.
Discussion: https://postgr.es/m/20190522083038.GA16837@paquier.xyz
Author: Michael Paquier Reviewed-by: Dmitry Dolgov, Andres Freund, Tom Lane
Andres Freund [Thu, 23 May 2019 21:46:52 +0000 (14:46 -0700)]
pg_upgrade: Make test.sh's installcheck use to-be-upgraded version's bindir.
On master (after 700538) the old version's installed psql was used -
even when the old version might not actually be installed / might be
installed into a temporary directory. As commonly the case when just
executing make check for pg_upgrade, as $oldbindir is just the current
version's $bindir.
In the back branches, with --install specified, psql from the new
version's temporary installation was used, without --install (e.g for
NO_TEMP_INSTALL, cf 47b3c26642), the new version's installed psql was
used (which might or might not exist).
Author: Andres Freund
Discussion: https://postgr.es/m/20190522175150.c26f4jkqytahajdg@alap3.anarazel.de
Andrew Gierth [Thu, 23 May 2019 14:26:01 +0000 (15:26 +0100)]
Fix array size allocation for HashAggregate hash keys.
When there were duplicate columns in the hash key list, the array
sizes could be miscomputed, resulting in access off the end of the
array. Adjust the computation to ensure the array is always large
enough.
(I considered whether the duplicates could be removed in planning, but
I can't rule out the possibility that duplicate columns might have
different hash functions assigned. Simpler to just make sure it works
at execution time regardless.)
Bug apparently introduced in fc4b3dea2 as part of narrowing down the
tuples stored in the hashtable. Reported by Colm McHugh of Salesforce,
though I didn't use their patch. Backpatch back to version 10 where
the bug was introduced.
Michael Paquier [Thu, 23 May 2019 01:48:17 +0000 (10:48 +0900)]
Fix ordering of GRANT commands in pg_dumpall for tablespaces
This uses a method similar to 68a7c24f and now b8c6014 (applied for
database creation), which guarantees that GRANT commands using the WITH
GRANT OPTION are dumped in a way so as cascading dependencies are
respected. Note that tablespaces do not have support for initial
privileges via pg_init_privs, so the same method needs to be applied
again. It would be nice to merge all the logic generating ACL queries
in dumps under the same banner, but this requires extending the support
of pg_init_privs to objects that cannot use it yet, so this is left as
future work.
Discussion: https://postgr.es/m/20190522071555.GB1278@paquier.xyz
Author: Michael Paquier Reviewed-by: Nathan Bossart
Backpatch-through: 9.6
Tom Lane [Wed, 22 May 2019 17:04:48 +0000 (13:04 -0400)]
Phase 2 pgindent run for v12.
Switch to 2.1 version of pg_bsd_indent. This formats
multiline function declarations "correctly", that is with
additional lines of parameter declarations indented to match
where the first line's left parenthesis is.
Tom Lane [Wed, 22 May 2019 16:55:34 +0000 (12:55 -0400)]
Initial pgindent run for v12.
This is still using the 2.0 version of pg_bsd_indent.
I thought it would be good to commit this separately,
so as to document the differences between 2.0 and 2.1 behavior.
Peter Eisentraut [Wed, 15 May 2019 17:37:52 +0000 (19:37 +0200)]
Convert ExecComputeStoredGenerated to use tuple slots
This code was still using the old style of forming a heap tuple rather
than using tuple slots. This would be less efficient if a non-heap
access method was used. And using tuple slots is actually quite a bit
faster when using heap as well.
Also add some test cases for generated columns with null values and
with varlena values. This lack of coverage was discovered while
working on this patch.
Fujii Masao [Wed, 22 May 2019 16:18:16 +0000 (01:18 +0900)]
Mention ANALYZE boolean options in documentation.
Commit 41b54ba78e allowed not only VACUUM but also ANALYZE options
to take a boolean argument. But it forgot to update the documentation
for ANALYZE. This commit adds the descriptions about those ANALYZE
boolean options into the documentation.
This patch also updates tab-completion for ANALYZE boolean options.
Tom Lane [Wed, 22 May 2019 15:46:57 +0000 (11:46 -0400)]
Fix O(N^2) performance issue in pg_publication_tables view.
The original coding of this view relied on a correlated IN sub-query.
Our planner is not very bright about correlated sub-queries, and even
if it were, there's no way for it to know that the output of
pg_get_publication_tables() is duplicate-free, making the de-duplicating
semantics of IN unnecessary. Hence, rewrite as a LATERAL sub-query.
This provides circa 100X speedup for me with a few hundred published
tables (the whole regression database), and things would degrade as
roughly O(published_relations * all_relations) beyond that.
Because the rules.out expected output changes, force a catversion bump.
Ordinarily we might not want to do that post-beta1; but we already know
we'll be doing a catversion bump before beta2 to fix pg_statistic_ext
issues, so it's pretty much free to fix it now instead of waiting for v13.
Tom Lane [Wed, 22 May 2019 14:38:21 +0000 (10:38 -0400)]
In transam.h, don't expose static inline functions to frontend code.
That leads to unsatisfied external references if the C compiler fails
to elide unused static functions. Apparently, we have no buildfarm
members building HEAD that have that issue ... but such compilers still
exist in the wild. Need to do something about that.
Michael Paquier [Wed, 22 May 2019 05:48:00 +0000 (14:48 +0900)]
Fix ordering of GRANT commands in pg_dump for database creation
This uses a method similar to 68a7c24f, which guarantees that GRANT
commands using the WITH GRANT OPTION are dumped in a way so as cascading
dependencies are respected. As databases do not have support for
initial privileges via pg_init_privs, we need to repeat again the same
ACL reordering method.
ACL for databases have been moved from pg_dumpall to pg_dump in v11, so
this impacts pg_dump for v11 and above, and pg_dumpall for v9.6 and
v10.
Michael Meskes [Wed, 22 May 2019 02:58:29 +0000 (04:58 +0200)]
Implement PREPARE AS statement for ECPG.
Besides implementing the new statement this change fix some issues with the
parsing of PREPARE and EXECUTE statements. The different forms of these
statements are now all handled in a ujnified way.
When $(MAKE) is present in a rule, make assumes that target is a
submake, and it doesn't need to buffer its output. But in this case
it's a shell script that needs buffered output. Avoid that heuristic,
by referring to $(MAKE) via an indirection.
Andres Freund [Tue, 21 May 2019 21:56:29 +0000 (14:56 -0700)]
pg_upgrade: Don't use separate installation for test.
For pg_upgrade's test we (unless prevented by the caller via via
NO_TEMP_INSTALL) built a separate installation. That causes an
unnecessary slowdown after the infrastructure introduced by dcae5faccab (and unnecessarily duplicates code).
Author: Andres Freund Reviewed-By: Tom Lane
Discussion:
https://postgr.es/m/20190521191918.z7kwnrlj45mk2k67@alap3.anarazel.de
https://postgr.es/m/20190521195209.qfzwfxvymguuwlu5@alap3.anarazel.de
Tom Lane [Tue, 21 May 2019 17:11:57 +0000 (13:11 -0400)]
Make pg_upgrade's test.sh less chatty.
The use of "set -x" to echo a subset of the test's commands might've
been a good idea during development of this test, but it's been stable
for long enough now that the extra output isn't very useful. Also
our project expectations have been trending towards less output in
non-error cases; the fact that "set -x" produces output on stderr
is particularly annoying from that standpoint. So get rid of it.
Also, pass "-A trust" to initdb explicitly so that it won't issue
a warning about "trust" being an insecure default. This matches
what the TAP tests have done for a long time, and again gets rid
of some noise on stderr.
Tom Lane [Tue, 21 May 2019 16:23:16 +0000 (12:23 -0400)]
Insert temporary debugging output in regression tests.
We're seeing occasional instability in the plans generated for
parallel queries on the "a_star" table hierarchy. This suggests
that something is changing the planner's stats for those tables,
but that should not be happening within a regression test run.
To try to gather some information about what's happening, insert
additional queries to check the basic page/tuple counts for these
tables, as well as whether any vacuums or analyzes have happened
on them. (We expect that only the database-wide VACUUM in
sanity_check.sql will have touched them.)
I added the probes not only in select_parallel.sql itself, but
also in stats.sql, bearing in mind that the stats collector's
lag may prevent the initial query from reporting current truth.
If any extra vacuum/analyze has happened, the recheck in stats.sql
definitely ought to see it.
This commit can be reverted once we figure out what's going on.
Per suggestion from David Rowley, though I changed the queries around.
Tom Lane [Mon, 20 May 2019 22:39:53 +0000 (18:39 -0400)]
Doc: improve description of regexp character classes.
Define the meanings of the POSIX-spec character classes in line,
rather than referring to the ctype(3) man page. That man page
doesn't even exist on many modern systems, and if it does exist
it probably says the wrong things about non-ASCII characters.
Also document our non-POSIX-spec "ascii" character class.
Also, point out here that this behavior is controlled by collation or
LC_CTYPE, since the existing text explaining that is pretty far away.
Per gripe from Geert Lobbestael. Given the lack of prior complaints,
I'm not excited about back-patching this.
This shouldn't have been committed without even running the tests (nor
were the tests added that were suggested). I'm fixing up the results
to get the buildfarm back to green, it's quite possible we'll want to
revert this later.
Fujii Masao [Mon, 20 May 2019 15:22:06 +0000 (00:22 +0900)]
Make VACUUM accept 1 and 0 as a boolean value.
Commit 41b54ba78e allowed existing VACUUM options to take a boolean
argument. It's documented that valid boolean values that VACUUM can
accept are true, false, on, off, 1, and 0. But previously the parser
failed to accept 1 and 0 as a boolean value in VACUUM syntax because
of a lack of NumericOnly clause for vac_analyze_option_arg in gram.y.
This commit adds such NumericOnly clause so that VACUUM options
can take also 1 and 0 as a boolean value.
Andres Freund [Mon, 20 May 2019 01:01:06 +0000 (18:01 -0700)]
Minimally fix partial aggregation for aggregates that don't have one argument.
For partial aggregation combine steps,
AggStatePerTrans->numTransInputs was set to the transition function's
number of inputs, rather than the combine function's number of
inputs (always 1).
That lead to partial aggregates with strict combine functions to
wrongly check for NOT NULL input as required by strictness. When the
aggregate wasn't exactly passed one argument, the strictness check was
either omitted (in the 0 args case) or too many arguments were
checked. In the latter case we'd read beyond the end of
FunctionCallInfoData->args (only in master).
AggStatePerTrans->numTransInputs actually has been wrong since since
9.6, where partial aggregates were added. But it turns out to not be
an active problem in 9.6 and 10, because numTransInputs wasn't used at
all for combine functions: Before c253b722f6 there simply was no NULL
check for the input to strict trans functions, and after that the
check was simply hardcoded for the right offset in fcinfo, as it's
done by code specific to combine functions.
In bf6c614a2f2 (11) the strictness check was generalized, with common
code doing the strictness checks for both plain and combine transition
functions, based on numTransInputs. For combine functions this lead to
not emitting an expression step to check for strict input in the 0
arguments case, and in the > 1 arguments case, we'd check too many
arguments.Due to the fact that the relevant fcinfo->isnull[2..] was
always zero-initialized (more or less by accident, by being part of
the AggStatePerTrans struct, which is palloc0'ed), there was no
observable damage in the latter case before a9c35cf85ca1f, we just
checked too many array elements.
Due to the changes in a9c35cf85ca1f, > 1 argument bug became visible,
because these days fcinfo is a) dynamically allocated without being
zeroed b) exactly the length required for the number of specified
arguments (hardcoded to 2 in this case).
This commit only contains a fairly minimal fix, setting numTransInputs
to a hardcoded 1 when building a pertrans for a combine function. It
seems likely that we'll want to clean this up further (e.g. the
arguments build_pertrans_for_aggref() aren't particularly meaningful
for combine functions). But the wrap date for 12 beta1 is coming up
fast, so it seems good to have a minimal fix in place.
Backpatch to 11. While AggStatePerTrans->numTransInputs was set
wrongly before that, the value was not used for combine functions.
Reported-By: Rajkumar Raghuwanshi Diagnosed-By: Kyotaro Horiguchi, Jeevan Chalke, Andres Freund, David Rowley
Author: David Rowley, Kyotaro Horiguchi, Andres Freund
Discussion: https://postgr.es/m/CAKcux6=uZEyWyLw0N7HtR9OBc-sWEFeByEZC7t-KDf15FKxVew@mail.gmail.com
Michael Paquier [Mon, 20 May 2019 00:47:19 +0000 (09:47 +0900)]
Fix some grammar in documentation of spgist and pgbench
Discussion: https://postgr.es/m/92961161-9b49-e42f-0a72-d5d47e0ed4de@postgrespro.ru
Author: Liudmila Mantrova Reviewed-by: Jonathan Katz, Tom Lane, Michael Paquier
Backpatch-through: 9.4
Andres Freund [Sun, 19 May 2019 23:17:18 +0000 (16:17 -0700)]
Fix and improve SnapshotType comments.
The comment for SNAPSHOT_SELF was unfortunately explaining
SNAPSHOT_DIRTY, as reported by Sergei. Also expand a few comments, and
include a few more comments from heapam_visibility.c, so they're in an
AM independent place.
Reported-By: Sergei Kornilov
Author: Andres Freund
Discussion: https://postgr.es/m/9152241558192351@sas1-d856b3d759c7.qloud-c.yandex.net
Andres Freund [Sun, 19 May 2019 22:10:28 +0000 (15:10 -0700)]
Don't to predicate lock for analyze scans, refactor scan option passing.
Before this commit, when ANALYZE was run on a table and serializable
was used (either by virtue of an explicit BEGIN TRANSACTION ISOLATION
LEVEL SERIALIZABLE, or default_transaction_isolation being set to
serializable) a null pointer dereference lead to a crash.
The analyze scan doesn't need a snapshot (nor predicate locking), but
before this commit a scan only contained information about being a
bitmap or sample scan.
Refactor the option passing to the scan_begin callback to use a
bitmask instead. Alternatively we could have added a new boolean
parameter, but that seems harder to read. Even before this issue
various people (Heikki, Tom, Robert) suggested doing so.
These changes don't change the scan APIs outside of tableam. The flags
argument could be exposed, it's not necessary to fix this
problem. Also the wrapper table_beginscan* functions encapsulate most
of that complexity.
After these changes fixing the bug is trivial, just don't acquire
predicate lock for analyze style scans. That was already done for
bitmap heap scans. Add an assert that a snapshot is passed when
acquiring the predicate lock, so this kind of bug doesn't require
running with serializable.
Also add a comment about sample scans currently requiring predicate
locking the entire relation, that previously wasn't remarked upon.
Reported-By: Joe Wildish
Author: Andres Freund
Discussion:
https://postgr.es/m/4EA80A20-E9BF-49F1-9F01-5B66CAB21453@elusive.cx
https://postgr.es/m/20190411164947.nkii4gaeilt4bui7@alap3.anarazel.de
https://postgr.es/m/20190518203102.g7peu2fianukjuxm@alap3.anarazel.de
Noah Misch [Sun, 19 May 2019 21:36:44 +0000 (14:36 -0700)]
In the pg_upgrade test suite, don't write to src/test/regress.
When this suite runs installcheck, redirect file creations from
src/test/regress to src/bin/pg_upgrade/tmp_check/regress. This closes a
race condition in "make -j check-world". If the pg_upgrade suite wrote
to a given src/test/regress/results file in parallel with the regular
src/test/regress invocation writing it, a test failed spuriously. Even
without parallelism, in "make -k check-world", the suite finishing
second overwrote the other's regression.diffs. This revealed test
"largeobject" assuming @abs_builddir@ is getcwd(), so fix that, too.
Buildfarm client REL_10, released forty-five days ago, supports saving
regression.diffs from its new location. When an older client reports a
pg_upgradeCheck failure, it will no longer include regression.diffs.
Back-patch to 9.5, where pg_upgrade moved to src/bin.
Tom Lane [Sun, 19 May 2019 17:55:39 +0000 (13:55 -0400)]
Improve logrotate test so that it meaningfully exercises syslogger.
Discussion of bug #15804 reveals that this test didn't really prove
that the syslogger child process ever launched successfully, much
less did anything. It was only checking that the expected log file
gets created, and that's done in the postmaster. Moreover, the
test assumed it could rename the log file, which is likely to fail
on Windows (cf. commit d611175e5).
Instead, use the default log file name pattern, which should result
in a new file name being chosen after 1 second, and verify that
rotation has occurred by checking for a new file name. Also add code
to test that messages actually do propagate through the syslogger.
In theory this version of the test should work on Windows, so
revert d611175e5.
While that's still a good idea in the abstract, we found out
that there are multiple crasher bugs in it on Windows builds,
making the logging_collector option unusable on Windows.
There's no time left to fix these issues before 12beta1,
so revert the patch to allow Windows beta testing to proceed.
We'll try again at some future date.
Per bug #15804 from Yulian Khodorkovskiy and additional
investigation by Michael Paquier.
Tom Lane [Sun, 19 May 2019 00:16:50 +0000 (20:16 -0400)]
ANSI-ify a few straggler K&R-style function definitions.
We still had a couple of these left in ancient src/port/ files.
Convert them to modern style in preparation for switching to
a version of pg_bsd_indent that doesn't cope well with K&R style.
Tom Lane [Sat, 18 May 2019 17:51:16 +0000 (13:51 -0400)]
Make BufFileCreateTemp() ensure that temp tablespaces are set up.
If PrepareTempTablespaces() has never been called in the current
transaction, OpenTemporaryFile() will fall back to using the default
tablespace, which is a bug if the user wanted temp files placed elsewhere.
gistInitBuildBuffers() appears to have this disease already, and it
seems like an easy trap for future coders to fall into.
We discussed other ways to close this gap, but none of them are prettier
or more reliable than just having BufFileCreateTemp do it. In particular,
having fd.c do this creates layering issues that we could do without.
Per suggestion from Melanie Plageman. Arguably this is a bug fix, but
nobody seems very excited about back-patching, so change in HEAD only.
Andres Freund [Sat, 18 May 2019 01:52:01 +0000 (18:52 -0700)]
tableam: Avoid relying on relation size to determine validity of tids.
Instead add a tableam callback to do so. To avoid adding per
validation overhead, pass a scan to tuple_tid_valid. In heap's case
we'd otherwise incurred a RelationGetNumberOfBlocks() call for each
tid - which'd have added noticable overhead to nodeTidscan.c.
Author: Andres Freund Reviewed-By: Ashwin Agrawal
Discussion: https://postgr.es/m/20190515185447.gno2jtqxyktylyvs@alap3.anarazel.de
Andres Freund [Sat, 18 May 2019 01:06:18 +0000 (18:06 -0700)]
tableam: Don't assume that every AM uses md.c style storage.
Previously various parts of the code routed size requests through
RelationGetNumberOfBlocks[InFork]. That works if md.c is used by the
AM, but not otherwise.
Add a tableam callback to return the size of the table. As not every
AM will use postgres' BLCKSZ, have it return bytes, and have
RelationGetNumberOfBlocksInFork() round the byte size up into blocks.
To allow code outside of the AM to determine the actual relation size
map InvalidForkNumber the total size of a relation, as not every AM
might just need the postgres defined forks.
A few users of RelationGetNumberOfBlocks() ought to be converted away
from that. One case, the use of it to determine whether a tid is
valid, will be fixed in a follow up commit. Others will have to wait
for v13.
Author: Andres Freund
Discussion: https://postgr.es/m/20190423225201.3bbv6tbqzkb5w7cw@alap3.anarazel.de
Tom Lane [Fri, 17 May 2019 23:44:19 +0000 (19:44 -0400)]
Restructure creation of run-time pruning steps.
Previously, gen_partprune_steps() always built executor pruning steps
using all suitable clauses, including those containing PARAM_EXEC
Params. This meant that the pruning steps were only completely safe
for executor run-time (scan start) pruning. To prune at executor
startup, we had to ignore the steps involving exec Params. But this
doesn't really work in general, since there may be logic changes
needed as well --- for example, pruning according to the last operator's
btree strategy is the wrong thing if we're not applying that operator.
The rules embodied in gen_partprune_steps() and its minions are
sufficiently complicated that tracking their incremental effects in
other logic seems quite impractical.
Short of a complete redesign, the only safe fix seems to be to run
gen_partprune_steps() twice, once to create executor startup pruning
steps and then again for run-time pruning steps. We can save a few
cycles however by noting during the first scan whether we rejected
any clauses because they involved exec Params --- if not, we don't
need to do the second scan.
In support of this, refactor the internal APIs in partprune.c to make
more use of passing information in the GeneratePruningStepsContext
struct, rather than as separate arguments.
This is, I hope, the last piece of our response to a bug report from
Alan Jackson. Back-patch to v11 where this code came in.
projects / postgresql / log