Up to now, read_sql_construct() has collected all the source text from
the statement or expression's initial token up to the character just
before the "until" token. It normally tries to strip trailing
whitespace from that, largely for neatness. If there was a "-- text"
comment after the expression, this resulted in removing the newline
that terminates the comment, which creates a hazard if we try to paste
the collected text into a larger SQL construct without inserting a
newline after it. In particular this caused our handling of CASE
constructs to fail if there's a comment after a WHEN expression.
Commit 4adead1d2 noticed a similar problem with cursor arguments,
and worked around it through the rather crude hack of suppressing
the whitespace-trimming behavior for those. Rather than do that
and leave the hazard open for future hackers to trip over, let's
fix it properly. pl_scanner.c already has enough infrastructure
to report the end location of the expression's last token, so
we can copy up to that location and never collect any trailing
whitespace or comment to begin with.
Erik Wienhold and Tom Lane, per report from Michal Bartak.
Back-patch to all supported branches.
Discussion: https://postgr.es/m/CAAVzF_FjRoi8fOVuLCZhQJx6HATQ7MKm=aFOHWZODFnLmjX-xA@mail.gmail.com
The "pltargs" variable wasn't marked volatile, which makes it unsafe
to change its value within the PG_TRY block. It looks like the worst
outcome would be to fail to release a refcount on Py_None during an
(improbable) error exit, which would likely go unnoticed in the field.
Still, it's a bug. A one-liner fix could be to mark pltargs volatile,
but on the whole it seems cleaner to arrange things so that we don't
change its value within PG_TRY.
Per report from Xing Guo. This has been there for quite awhile,
so back-patch to all supported branches.
Discussion: https://postgr.es/m/CACpMh+DLrk=fDv07MNpBT4J413fDAm+gmMXgi8cjPONE+jvzuw@mail.gmail.com
This checks that certain I/O-related Perl functions properly check
their return value. Some parts of the PostgreSQL code had been a bit
sloppy about that. The new perlcritic warnings are fixed here. I
didn't design any beautiful error messages, mostly just used "or die
$!", which mostly matches existing code, and also this is
developer-level code, so having the system error plus source code
reference should be ok.
Initially, we only activate this check for a subset of what the
perlcritic check would warn about. The effective list is
chmod flock open read rename seek symlink system
The initial set of functions is picked because most existing code
already checked the return value of those, so any omissions are
probably unintended, or because it seems important for test
correctness.
The actual perlcritic configuration is written as an exclude list.
That seems better so that we are clear on what we are currently not
checking. Maybe future patches want to investigate checking some of
the other functions. (In principle, we might eventually want to check
all of them, but since this is test and build support code, not
production code, there are probably some reasonable compromises to be
made.)
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Discussion: https://www.postgresql.org/message-id/flat/88b7d4f2-46d9-4cc7-b1f7-613c90f9a76a%40eisentraut.org
This allows a RETURNING clause to be appended to a MERGE query, to
return values based on each row inserted, updated, or deleted. As with
plain INSERT, UPDATE, and DELETE commands, the returned values are
based on the new contents of the target table for INSERT and UPDATE
actions, and on its old contents for DELETE actions. Values from the
source relation may also be returned.
As with INSERT/UPDATE/DELETE, the output of MERGE ... RETURNING may be
used as the source relation for other operations such as WITH queries
and COPY commands.
Additionally, a special function merge_action() is provided, which
returns 'INSERT', 'UPDATE', or 'DELETE', depending on the action
executed for each row. The merge_action() function can be used
anywhere in the RETURNING list, including in arbitrary expressions and
subqueries, but it is an error to use it anywhere outside of a MERGE
query's RETURNING list.
Dean Rasheed, reviewed by Isaac Morland, Vik Fearing, Alvaro Herrera,
Gurjeet Singh, Jian He, Jeff Davis, Merlin Moncure, Peter Eisentraut,
and Wolfgang Walther.
Discussion: http://postgr.es/m/CAEZATCWePEGQR5LBn-vD6SfeLZafzEm2Qy_L_Oky2=qw2w3Pzg@mail.gmail.com
Previously, backend ID was an index into the ProcState array, in the
shared cache invalidation manager (sinvaladt.c). The entry in the
ProcState array was reserved at backend startup by scanning the array
for a free entry, and that was also when the backend got its backend
ID. Things become slightly simpler if we redefine backend ID to be the
index into the PGPROC array, and directly use it also as an index to
the ProcState array. This uses a little more memory, as we reserve a
few extra slots in the ProcState array for aux processes that don't
need them, but the simplicity is worth it.
Aux processes now also have a backend ID. This simplifies the
reservation of BackendStatusArray and ProcSignal slots.
You can now convert a backend ID into an index into the PGPROC array
simply by subtracting 1. We still use 0-based "pgprocnos" in various
places, for indexes into the PGPROC array, but the only difference now
is that backend IDs start at 1 while pgprocnos start at 0. (The next
commmit will get rid of the term "backend ID" altogether and make
everything 0-based.)
There is still a 'backendId' field in PGPROC, now part of 'vxid' which
encapsulates the backend ID and local transaction ID together. It's
needed for prepared xacts. For regular backends, the backendId is
always equal to pgprocno + 1, but for prepared xact PGPROC entries,
it's the ID of the original backend that processed the transaction.
Reviewed-by: Andres Freund, Reid Thompson
Discussion: https://www.postgresql.org/message-id/8171f1aa-496f-46a6-afc3-c46fe7a9b407@iki.fi
If one of these constructs referenced a nonexistent object, we'd fall
through to feeding the whole construct to the core parser, which would
reject it with a "syntax error" message. That's pretty unhelpful and
misleading. There's no good reason for plpgsql_parse_wordtype and
friends not to throw a useful error for incorrect input, so make them
do that instead of returning NULL.
Discussion: https://postgr.es/m/1964516.1708977740@sss.pgh.pa.us
plpgsql fails on new-style CREATE FUNCTION/PROCEDURE commands within
a routine or DO block, because make_execsql_stmt believes that a
semicolon token always terminates a SQL command. Now, that's actually
been wrong since the day it was written, because CREATE RULE has long
allowed multiple rule actions separated by semicolons. But there are
few enough people using multi-action rules that there was never an
attempt to fix it. New-style SQL functions, though, are popular.
psql has this same problem of "does this semicolon really terminate
the command?". It deals with CREATE RULE by counting parenthesis
nesting depth: a semicolon within parens doesn't end a command.
Commits e717a9a18 and 029c5ac03 created a similar heuristic to count
matching BEGIN/END pairs (but only within CREATEs, so as not to be
fooled by plain BEGIN). That's survived several releases now without
trouble reports, so let's just absorb those heuristics into plpgsql.
Per report from Samuel Dussault. Back-patch to v14 where new-style
SQL function syntax came in.
Discussion: https://postgr.es/m/YT2PR01MB88552C3E9AD40A6C038774A781722@YT2PR01MB8855.CANPRD01.PROD.OUTLOOK.COM
Support referencing a composite-type variable in %TYPE.
Remove the undocumented, untested, and pretty useless ability
to have the subject of %TYPE be an (unqualified) type name.
You get the same result by just not writing %TYPE.
Add or adjust some test cases to improve code coverage here.
Discussion: https://postgr.es/m/716852.1704402127@sss.pgh.pa.us
There are a lot of Perl scripts in the tree, mostly code generation
and TAP tests. Occasionally, these scripts produce warnings. These
are probably always mistakes on the developer side (true positives).
Typical examples are warnings from genbki.pl or related when you make
a mess in the catalog files during development, or warnings from tests
when they massage a config file that looks different on different
hosts, or mistakes during merges (e.g., duplicate subroutine
definitions), or just mistakes that weren't noticed because there is a
lot of output in a verbose build.
This changes all warnings into fatal errors, by replacing
use warnings;
by
use warnings FATAL => 'all';
in all Perl files.
Discussion: https://www.postgresql.org/message-id/flat/06f899fd-1826-05ab-42d6-adeb1fd5e200%40eisentraut.org
Like commit 388e80132, use "#pragma GCC system_header" to silence
warnings appearing within the Python headers, since newer Python
versions no longer worry about some restrictions we still use like
-Wdeclaration-after-statement.
This patch improves on 388e80132 by inventing a separate wrapper
header file, allowing the pragma to be tightly scoped to just
the Python headers and not other stuff we have laying about in
plpython.h. I applied the same technique to plperl for the same
reason: the original patch suppressed warnings for a good deal
of our own code, not only the Perl headers.
Like the previous commit, back-patch to supported branches.
Peter Eisentraut and Tom Lane
Discussion: https://postgr.es/m/ae523163-6d2a-4b81-a875-832e48dec502@eisentraut.org
Up to now, our distribution tarballs have included a plain-text form
of the installation.sgml chapter. The rationale for that was that a
recipient might not have either ready internet access or HTML-viewing
tools; a theory that seems downright quaint today. Maintaining the
ability to generate this file is not without cost, because it puts
special requirements on installation.sgml that are often overlooked.
Moreover, we are moving in the direction of making our distribution
tarballs be pure git snapshots for traceability/reproducibility
reasons; including generated files doesn't fit into that plan.
Hence, let's just drop INSTALL and remove the infrastructure for
generating it. The top-level README will now recommend visiting
our website to see the installation instructions. As a useful
side-effect, we can get rid of README.git which has provoked
confusion.
Discussion: https://postgr.es/m/20231220114927.faccqqprmuyrzdip@alap3.anarazel.de
Discussion: https://postgr.es/m/e07408d9-e5f2-d9fd-5672-f53354e9305e@eisentraut.org
A few places in array_in() and plperl would report a misleading value
(always MAXDIM+1) for the number of dimensions in the input, because
we'd error out as soon as that was clearly too large rather than
scanning the entire input. There doesn't seem to be much value in
offering the true number, at least not enough to justify the extra
complication involved in trying to get it. So just remove that
parenthetical remark. We already have other places that do it
like that, anyway.
Per suggestions from Alexander Lakhin and Heikki Linnakangas.
Discussion: https://postgr.es/m/2794005.1683042087@sss.pgh.pa.us
Instead of having a separate array/hash for each resource kind, use a
single array and hash to hold all kinds of resources. This makes it
possible to introduce new resource "kinds" without having to modify
the ResourceOwnerData struct. In particular, this makes it possible
for extensions to register custom resource kinds.
The old approach was to have a small array of resources of each kind,
and if it fills up, switch to a hash table. The new approach also uses
an array and a hash, but now the array and the hash are used at the
same time. The array is used to hold the recently added resources, and
when it fills up, they are moved to the hash. This keeps the access to
recent entries fast, even when there are a lot of long-held resources.
All the resource-specific ResourceOwnerEnlarge*(),
ResourceOwnerRemember*(), and ResourceOwnerForget*() functions have
been replaced with three generic functions that take resource kind as
argument. For convenience, we still define resource-specific wrapper
macros around the generic functions with the old names, but they are
now defined in the source files that use those resource kinds.
The release callback no longer needs to call ResourceOwnerForget on
the resource being released. ResourceOwnerRelease unregisters the
resource from the owner before calling the callback. That needed some
changes in bufmgr.c and some other files, where releasing the
resources previously always called ResourceOwnerForget.
Each resource kind specifies a release priority, and
ResourceOwnerReleaseAll releases the resources in priority order. To
make that possible, we have to restrict what you can do between
phases. After calling ResourceOwnerRelease(), you are no longer
allowed to remember any more resources in it or to forget any
previously remembered resources by calling ResourceOwnerForget. There
was one case where that was done previously. At subtransaction commit,
AtEOSubXact_Inval() would handle the invalidation messages and call
RelationFlushRelation(), which temporarily increased the reference
count on the relation being flushed. We now switch to the parent
subtransaction's resource owner before calling AtEOSubXact_Inval(), so
that there is a valid ResourceOwner to temporarily hold that relcache
reference.
Other end-of-xact routines make similar calls to AtEOXact_Inval()
between release phases, but I didn't see any regression test failures
from those, so I'm not sure if they could reach a codepath that needs
remembering extra resources.
There were two exceptions to how the resource leak WARNINGs on commit
were printed previously: llvmjit silently released the context without
printing the warning, and a leaked buffer io triggered a PANIC. Now
everything prints a WARNING, including those cases.
Add tests in src/test/modules/test_resowner.
Reviewed-by: Aleksander Alekseev, Michael Paquier, Julien Rouhaud
Reviewed-by: Kyotaro Horiguchi, Hayato Kuroda, Álvaro Herrera, Zhihong Yu
Reviewed-by: Peter Eisentraut, Andres Freund
Discussion: https://www.postgresql.org/message-id/cbfabeb0-cd3c-e951-a572-19b365ed314d%40iki.fi
A PostgreSQL release tarball contains a number of prebuilt files, in
particular files produced by bison, flex, perl, and well as html and
man documentation. We have done this consistent with established
practice at the time to not require these tools for building from a
tarball. Some of these tools were hard to get, or get the right
version of, from time to time, and shipping the prebuilt output was a
convenience to users.
Now this has at least two problems:
One, we have to make the build system(s) work in two modes: Building
from a git checkout and building from a tarball. This is pretty
complicated, but it works so far for autoconf/make. It does not
currently work for meson; you can currently only build with meson from
a git checkout. Making meson builds work from a tarball seems very
difficult or impossible. One particular problem is that since meson
requires a separate build directory, we cannot make the build update
files like gram.h in the source tree. So if you were to build from a
tarball and update gram.y, you will have a gram.h in the source tree
and one in the build tree, but the way things work is that the
compiler will always use the one in the source tree. So you cannot,
for example, make any gram.y changes when building from a tarball.
This seems impossible to fix in a non-horrible way.
Second, there is increased interest nowadays in precisely tracking the
origin of software. We can reasonably track contributions into the
git tree, and users can reasonably track the path from a tarball to
packages and downloads and installs. But what happens between the git
tree and the tarball is obscure and in some cases non-reproducible.
The solution for both of these issues is to get rid of the step that
adds prebuilt files to the tarball. The tarball now only contains
what is in the git tree (*). Getting the additional build
dependencies is no longer a problem nowadays, and the complications to
keep these dual build modes working are significant. And of course we
want to get the meson build system working universally.
This commit removes the make distprep target altogether. The make
dist target continues to do its job, it just doesn't call distprep
anymore.
(*) - The tarball also contains the INSTALL file that is built at make
dist time, but not by distprep. This is unchanged for now.
The make maintainer-clean target, whose job it is to remove the
prebuilt files in addition to what make distclean does, is now just an
alias to make distprep. (In practice, it is probably obsolete given
that git clean is available.)
The following programs are now hard build requirements in configure
(they were already required by meson.build):
- bison
- flex
- perl
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Reviewed-by: Andres Freund <andres@anarazel.de>
Discussion: https://www.postgresql.org/message-id/flat/e07408d9-e5f2-d9fd-5672-f53354e9305e@eisentraut.org
Since C99, there can be a trailing comma after the last value in an
enum definition. A lot of new code has been introducing this style on
the fly. Some new patches are now taking an inconsistent approach to
this. Some add the last comma on the fly if they add a new last
value, some are trying to preserve the existing style in each place,
some are even dropping the last comma if there was one. We could
nudge this all in a consistent direction if we just add the trailing
commas everywhere once.
I omitted a few places where there was a fixed "last" value that will
always stay last. I also skipped the header files of libpq and ecpg,
in case people want to use those with older compilers. There were
also a small number of cases where the enum type wasn't used anywhere
(but the enum values were), which ended up confusing pgindent a bit,
so I left those alone.
Discussion: https://www.postgresql.org/message-id/flat/386f8c45-c8ac-4681-8add-e3b0852c1620%40eisentraut.org
Add "-gmt 1" to our test invocations of the Tcl "clock" command,
so that they do not consult the timezone environment. While it
doesn't really matter which timezone is used here, it does
matter that the command not fall over entirely. We've now
discovered that at least on FreeBSD, "clock scan" will fail if
/etc/localtime is missing. It seems worth making the test
insensitive to that.
Per Tomas Vondras' buildfarm animal dikkop. Thanks to
Thomas Munro for the diagnosis.
Discussion: https://postgr.es/m/316d304a-1dcd-cea1-3d6c-27f794727a06@enterprisedb.com
Parse analysis of a CallStmt will inject mutable information,
for instance the OID of the called procedure, so that subsequent
DDL may create a need to re-parse the CALL. We failed to detect
this for CALLs in plpgsql routines, because no dependency information
was collected when putting a CallStmt into the plan cache. That
could lead to misbehavior or strange errors such as "cache lookup
failed".
Before commit ee895a655, the issue would only manifest for CALLs
appearing in atomic contexts, because we re-planned non-atomic
CALLs every time through anyway.
It is now apparent that extract_query_dependencies() probably
needs a special case for every utility statement type for which
stmt_requires_parse_analysis() returns true. I wanted to add
something like Assert(!stmt_requires_parse_analysis(...)) when
falling out of extract_query_dependencies_walker without doing
anything, but there are API issues as well as a more fundamental
point: stmt_requires_parse_analysis is supposed to be applied to
raw parser output, so it'd be cheating to assume it will give the
correct answer for post-parse-analysis trees. I contented myself
with adding a comment.
Per bug #18131 from Christian Stork. Back-patch to all supported
branches.
Discussion: https://postgr.es/m/18131-576854e79c5cd264@postgresql.org
PLy_elog() was not able to handle correctly cases where a SPI called
failed, which would fill in a DETAIL string able to trigger an
assertion. We may want to improve this infrastructure so as it is able
to provide any extra detail information provided by an error stack, but
this is left as a future improvement as it could impact existing error
stacks and any applications that depend on them. For now, the assertion
is removed and a regression test is added to cover the case of a failure
with a detail string.
This problem exists since 2bd78eb8d5, so backpatch all the way down
with tweaks to the regression tests output added where required.
Author: Alexander Lakhin
Discussion: https://postgr.es/m/18070-ab9c171cbf4ebb0f@postgresql.org
Backpatch-through: 11
Revalidation of a plancache entry (after a cache invalidation event)
requires acquiring a snapshot. Normally that is harmless, but not
if the cached statement is one that needs to run without acquiring a
snapshot. We were already aware of that for TransactionStmts,
but for some reason hadn't extrapolated to the other statements that
PlannedStmtRequiresSnapshot() knows mustn't set a snapshot. This can
lead to unexpected failures of commands such as SET TRANSACTION
ISOLATION LEVEL. We can fix it in the same way, by excluding those
command types from revalidation.
However, we can do even better than that: there is no need to
revalidate for any statement type for which parse analysis, rewrite,
and plan steps do nothing interesting, which is nearly all utility
commands. To mechanize this, invent a parser function
stmt_requires_parse_analysis() that tells whether parse analysis does
anything beyond wrapping a CMD_UTILITY Query around the raw parse
tree. If that's what it does, then rewrite and plan will just
skip the Query, so that it is not possible for the same raw parse
tree to produce a different plan tree after cache invalidation.
stmt_requires_parse_analysis() is basically equivalent to the
existing function analyze_requires_snapshot(), except that for
obscure reasons that function omits ReturnStmt and CallStmt.
It is unclear whether those were oversights or intentional.
I have not been able to demonstrate a bug from not acquiring a
snapshot while analyzing these commands, but at best it seems mighty
fragile. It seems safer to acquire a snapshot for parse analysis of
these commands too, which allows making stmt_requires_parse_analysis
and analyze_requires_snapshot equivalent.
In passing this fixes a second bug, which is that ResetPlanCache
would exclude ReturnStmts and CallStmts from revalidation.
That's surely *not* safe, since they contain parsable expressions.
Per bug #18059 from Pavel Kulakov. Back-patch to all supported
branches.
Discussion: https://postgr.es/m/18059-79c692f036b25346@postgresql.org
Eventually it is likely worth trying to deal with this in a more expansive
way, by generating dependency files generated within the scripts. But it's not
entirely obvious how to do that in perl and is work more suitable for 17
anyway.
Reported-by: Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>
Reviewed-by: Tristan Partin <tristan@neon.tech>
Discussion: https://postgr.es/m/87v8g7s6bf.fsf@wibble.ilmari.org
Run pgindent, pgperltidy, and reformat-dat-files.
This set of diffs is a bit larger than typical. We've updated to
pg_bsd_indent 2.1.2, which properly indents variable declarations that
have multi-line initialization expressions (the continuation lines are
now indented one tab stop). We've also updated to perltidy version
20230309 and changed some of its settings, which reduces its desire to
add whitespace to lines to make assignments etc. line up. Going
forward, that should make for fewer random-seeming changes to existing
code.
Discussion: https://postgr.es/m/20230428092545.qfb3y5wcu4cm75ur@alvherre.pgsql
Like plperl before f47004add, plpython wasn't being sufficiently
careful about checking that list-of-list structures represent
rectangular arrays, so that it would accept some cases in which
different parts of the "array" are nested to different depths.
This was exacerbated by Python's weak distinction between
sequences and lists, so that in some cases strings could get
treated as though they are lists (and burst into individual
characters) even though a different ordering of the upper-level
list would give a different result.
Some of this behavior was unreachable (without risking a crash)
before 81eaaf65e. It seems like a good idea to clean it all up
in the same releases, rather than shipping a non-crashing but
nonetheless visibly buggy behavior in the name of minimal change.
Hence, back-patch.
Per bug #17912 and further testing by Alexander Lakhin.
Discussion: https://postgr.es/m/17912-82ceed78731d9cdc@postgresql.org
plperl_array_to_datum() wasn't sufficiently careful about checking
that nested lists represent a rectangular array structure; it would
accept inputs such as "[1, []]". This is a bit related to the
PL/Python bug fixed in commit 81eaaf65e, but it doesn't seem to
provide any direct route to a memory stomp. Instead the likely
failure mode is for makeMdArrayResult to be passed fewer Datums than
the claimed array dimensionality requires, possibly leading to a wild
pointer dereference and SIGSEGV.
Per report from Alexander Lakhin. It's been broken for a long
time, so back-patch to all supported branches.
Discussion: https://postgr.es/m/5ebae5e4-d401-fadf-8585-ac3eaf53219c@gmail.com
If PLySequence_ToArray came across a zero-length sublist, it'd compute
the overall array size as zero, possibly leading to a memory clobber.
(This would likely qualify as a security bug, were it not that plpython
is an untrusted language already.)
I think there are other corner-case issues in this code as well, notably
that the error messages don't match the core code and for some ranges
of array sizes you'd get "invalid memory alloc request size" rather than
the intended message about array size.
Really this code has no business doing its own array size calculation
at all, so remove the faulty code in favor of using ArrayGetNItems().
Per bug #17912 from Alexander Lakhin. Bug seems to have come in with
commit 94aceed31, so back-patch to all supported branches.
Discussion: https://postgr.es/m/17912-82ceed78731d9cdc@postgresql.org
Commit 04fe805a1 modified plpgsql so that datatype casts make use of
expressions cached by plancache.c, in place of older code where these
expression trees were managed by plpgsql itself. However, I (tgl)
forgot that we use a separate, shorter-lived cast info hashtable in
DO blocks. The new mechanism thus resulted in session-lifespan
leakage of the plancache data once a DO block containing one or more
casts terminated. To fix, split the cast hash table into two parts,
one that tracks only the plancache's CachedExpressions and one that
tracks the expression state trees generated from them. DO blocks need
their own expression state trees and hence their own version of the
second hash table, but there's no reason they can't share the
CachedExpressions with regular plpgsql functions.
Per report from Ajit Awekar. Back-patch to v12 where the issue
was introduced.
Ajit Awekar and Tom Lane
Discussion: https://postgr.es/m/CAHv6PyrNaqdvyWUspzd3txYQguFTBSnhx+m6tS06TnM+KWc_LQ@mail.gmail.com
Make sure that function declarations use names that exactly match the
corresponding names from function definitions in a few places. These
inconsistencies were all introduced relatively recently, after the code
base had parameter name mismatches fixed in bulk (see commits starting
with commits 4274dc22 and 035ce1fe).
pg_bsd_indent still has a couple of similar inconsistencies, which I
(pgeoghegan) have left untouched for now.
Like all earlier commits that cleaned up function parameter names, this
commit was written with help from clang-tidy.
Invent "GET DIAGNOSTICS oid_variable = PG_ROUTINE_OID".
This is useful for avoiding the maintenance nuisances that come
with embedding a function's name in its body, as one might do
for logging purposes for example. Typically users would cast the
result to regproc or regprocedure to get something human-readable,
but we won't pre-judge whether that's appropriate.
Pavel Stehule, reviewed by Kirk Wolak and myself
Discussion: https://postgr.es/m/CAFj8pRA4zMd5pY-B89Gm64bDLRt-L+akOd34aD1j4PEstHHSVQ@mail.gmail.com
When extracting an attr from a cached tuple in the syscache with
SysCacheGetAttr the isnull parameter must be checked in case the
attr cannot be NULL. For cases when this is known beforehand, a
wrapper is introduced which perform the errorhandling internally
on behalf of the caller, invoking an elog in case of a NULL attr.
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: Peter Eisentraut <peter.eisentraut@enterprisedb.com>
Reviewed-by: David Rowley <dgrowleyml@gmail.com>
Discussion: https://postgr.es/m/AD76405E-DB45-46B6-941F-17B1EB3A9076@yesql.se
One file per line seems best. We already did this in some cases.
This adopts the same format everywhere (except in some cases where the
list reasonably fits on one line).
force_parallel_mode is meant to be used to allow us to exercise the
parallel query infrastructure to ensure that it's working as we expect.
It seems some users think this GUC is for forcing the query planner into
picking a parallel plan regardless of the costs. A quick look at the
documentation would have made them realize that they were wrong, but the
GUC is likely too conveniently named which, evidently, seems to often
result in users expecting that it forces the planner into usefully
parallelizing queries.
Here we rename the GUC to something which casual users are less likely to
mistakenly think is what they need to make their query run more quickly.
For now, the old name can still be used. We'll revisit if the old name
mapping can be removed once the buildfarm configs are all updated.
Reviewed-by: John Naylor
Discussion: https://postgr.es/m/CAApHDvrsOi92_uA7PEaHZMH-S4Xv+MGhQWA+GrP8b1kjpS1HjQ@mail.gmail.com
This allows underscores to be used in integer and numeric literals,
and their corresponding type input functions, for visual grouping.
For example:
1_500_000_000
3.14159_26535_89793
0xffff_ffff
0b_1001_0001
A single underscore is allowed between any 2 digits, or immediately
after the base prefix indicator of non-decimal integers, per SQL:202x
draft.
Peter Eisentraut and Dean Rasheed
Discussion: https://postgr.es/m/84aae844-dc55-a4be-86d9-4f0fa405cc97%40enterprisedb.com
We undefined them to avoid warnings about macro redefinitions. But we haven't
fully followed the necessary include order, since at least 147c248254, in
2011. Recently the combination of the include order rules not being followed
and undefining _POSIX_C_SOURCE started to cause a compile failure, starting
with 03023a2664. Undefining _POSIX_C_SOURCE hides clock_gettime(), which is
referenced in an inline function as of 03023a2664, whereas it was a macro
before.
After seeing some evidence that undefining _POSIX_C_SOURCE et al isn't
required, I tried to build postgres with plpython on most of our supported
platforms (except DragonFlyBSD and Illumos, but similar systems were tested),
with/without the #undefines. No compiler warning / behavioral difference.
The oldest supported python version, 3.2, defines _POSIX_C_SOURCE to 200112L
ad _XOPEN_SOURCE to 600, whereas newer versions of python use 200809L/700
respectively. As _POSIX_C_SOURCE/_XOPEN_SOURCE will default to the newer
operating system on most platforms, it's possible that when using python 3.2
new warnings would be emitted - but that seems acceptable.
It's possible that this approach won't work on some older platforms. But
getting rid of most of the include-order complexity seems promising, and it's
an easily revertible patch if we end up having to go another way.
Discussion: https://postgr.es/m/20230124165814.2njc7gnvubn2amh6@awork3.anarazel.de
Until now we undefined and then redefined a lot of *printf macros due to
worries about conflicts with Python.h macro definitions. Current Python.h
doesn't define any *printf macros, and older versions just defined snprintf,
vsnprintf, guarded by #if defined(MS_WIN32) && !defined(HAVE_SNPRINTF).
Thus we can replace the undefine/define section with a single
#define HAVE_SNPRINTF 1
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/20230124165814.2njc7gnvubn2amh6@awork3.anarazel.de
Tom Lane