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It seems potentially useful to label our shared libraries with version
information, now that a facility exists for retrieving that. This
patch labels them with the PG_VERSION string. There was some
discussion about using semantic versioning conventions, but that
doesn't seem terribly helpful for modules with no SQL-level presence;
and for those that do have SQL objects, we typically expect them
to support multiple revisions of the SQL definitions, so it'd still
not be very helpful.
I did not label any of src/test/modules/. It seems unnecessary since
we don't install those, and besides there ought to be someplace that
still provides test coverage for the original PG_MODULE_MAGIC macro.
Author: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/dd4d1b59-d0fe-49d5-b28f-1e463b68fa32@gmail.com
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Commit 121d2d3d70 included simd.h into pg_wchar.h. This caused a problem
on Windows, since Perl has "#define free" (referring to globals), which
breaks the Windows' header. To fix, move the static inline function
definitions from plperl_helpers.h, into plperl.h, where we already
document the necessary inclusion order. Since those functions were the
only reason for the existence of plperl_helpers.h, remove it.
First reported by Justin Pryzby
Diagnosis and review by Andres Freund, patch by myself per suggestion
from Tom Lane
Discussion: https://www.postgresql.org/message-id/20220826115546.GE2342%40telsasoft.com
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The prior commit declared them centrally.
Author: Andres Freund <andres@anarazel.de>
Reviewed-By: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/20211101020311.av6hphdl6xbjbuif@alap3.anarazel.de
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Cosmetic cleanup, not worth backpatching.
Discussion: https://postgr.es/m/20200129200401.GA6303@alvherre.pgsql
Reviewed-by: Tom Lane, Michael Paquier
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Perl likes to redefine the _() macro:
#ifdef CAN_PROTOTYPE
#define _(args) args
#else ...
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().
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Neither plperl nor plpython installed sufficient header files to
permit transform modules to be built out-of-tree using PGXS. Fix that
by installing all plperl and plpython header files (other than those
with special purposes such as generated data tables), and also install
plpython's special .mk file for mangling regression tests.
(This commit does not fix the windows install, which does not
currently install _any_ plperl or plpython headers.)
Also fix the existing transform modules for hstore and ltree so that
their cross-module #include directives work as anticipated by commit
df163230b9 et seq. This allows them to serve as working examples of
how to reference other modules when doing separate out-of-tree builds.
Discussion: https://postgr.es/m/87o9ej8bgl.fsf%40news-spur.riddles.org.uk
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Bring this transform function into sync with the policy established
by commit 3a382983d.
Also, fix it to make sure that what it drills down to is indeed a
hash, and not some other kind of Perl SV. Previously, the test
cases added here provoked crashes.
Because of the crash hazard, back-patch to 9.5 where this module
was introduced.
Discussion: https://postgr.es/m/28336.1528393969@sss.pgh.pa.us
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By project convention, these names should include "P" when dealing with a
pointer type; that is, if the result of a GETARG macro is of type FOO *,
it should be called PG_GETARG_FOO_P not just PG_GETARG_FOO. Some newer
types such as JSONB and ranges had not followed the convention, and a
number of contrib modules hadn't gotten that memo either. Rename the
offending macros to improve consistency.
In passing, fix a few places that thought PG_DETOAST_DATUM() returns
a Datum; it does not, it returns "struct varlena *". Applying
DatumGetPointer to that happens not to cause any bad effects today,
but it's formally wrong. Also, adjust an ltree macro that was designed
without any thought for what pgindent would do with it.
This is all cosmetic and shouldn't have any impact on generated code.
Mark Dilger, some further tweaks by me
Discussion: https://postgr.es/m/EA5676F4-766F-4F38-8348-ECC7DB427C6A@gmail.com
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In Perl builds that define PERL_IMPLICIT_SYS, XSUB.h defines macros
that replace a whole lot of basic libc functions with Perl functions.
We can't tolerate that in plperl.c; it breaks at least PG_TRY and
probably other stuff. The core idea of this patch is to include XSUB.h
only in the .xs files where it's really needed, and to move any code
broken by PERL_IMPLICIT_SYS out of the .xs files and into plperl.c.
The reason this hasn't been a problem before is that our build techniques
did not result in PERL_IMPLICIT_SYS appearing as a #define in PL/Perl,
even on some platforms where Perl thinks it is defined. That's about to
change in order to fix a nasty portability issue, so we need this work to
make the code safe for that.
Rather unaccountably, the Perl people chose XSUB.h as the place to provide
the versions of the aTHX/aTHX_ macros that are needed by code that's not
explicitly aware of the MULTIPLICITY API conventions. Hence, just removing
XSUB.h from plperl.c fails miserably. But we can work around that by
defining PERL_NO_GET_CONTEXT (which would make the relevant stanza of
XSUB.h a no-op anyway). As explained in perlguts.pod, that means we need
to add a "dTHX" macro call in every C function that calls a Perl API
function. In most of them we just add this at the top; but since the
macro fetches the current Perl interpreter pointer, more care is needed
in functions that switch the active interpreter. Lack of the macro is
easily recognized since it results in bleats about "my_perl" not being
defined.
(A nice side benefit of this is that it significantly reduces the number
of fetches of the current interpreter pointer. On my machine, plperl.so
gets more than 10% smaller, and there's probably some performance win too.
We could reduce the number of fetches still more by decorating the code
with pTHX_/aTHX_ macros to pass the interpreter pointer around, as
explained by perlguts.pod; but that's a task for another day.)
Formatting note: pgindent seems happy to treat "dTHX;" as a declaration
so long as it's the first thing after the left brace, as we'd already
observed with respect to the similar macro "dSP;". If you try to put
it later in a set of declarations, pgindent puts ugly extra space
around it.
Having removed XSUB.h from plperl.c, we need only move the support
functions for spi_return_next and util_elog (both of which use PG_TRY)
out of the .xs files and into plperl.c. This seems sufficient to
avoid the known problems caused by PERL_IMPLICIT_SYS, although we
could move more code if additional issues emerge.
This will need to be back-patched, but first let's see what the
buildfarm makes of it.
Patch by me, with some help from Ashutosh Sharma
Discussion: https://postgr.es/m/CANFyU97OVQ3+Mzfmt3MhuUm5NwPU=-FtbNH5Eb7nZL9ua8=rcA@mail.gmail.com
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Just turning the crank on the project started in commit d51924be8.
These cases turn out to be exact subsets of the boilerplate needed
for hstore_plpython.
Discussion: <2652.1475512158@sss.pgh.pa.us>
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Some versions of Perl export a macro named HS_KEY. This creates a
conflict in contrib/hstore_plperl against hstore's macro of the same
name. The most future-proof solution seems to be to rename our macro;
I chose HSTORE_KEY. For consistency, rename HS_VAL and related macros
similarly.
Back-patch to 9.5. contrib/hstore_plperl doesn't exist before that
so there is no need to worry about the conflict in older releases.
Per reports from Marco Atzeri and Mike Blackwell.
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Remove a bunch of "extern Datum foo(PG_FUNCTION_ARGS);" declarations that
are no longer needed now that PG_FUNCTION_INFO_V1(foo) provides that.
Some of these were evidently missed in commit e7128e8dbb305059, but others
were cargo-culted in in code added since then. Possibly that can be blamed
in part on the fact that we'd not fixed relevant documentation examples,
which I've now done.
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This provides a mechanism for specifying conversions between SQL data
types and procedural languages. As examples, there are transforms
for hstore and ltree for PL/Perl and PL/Python.
reviews by Pavel Stěhule and Andres Freund
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