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Rewrite plancache.c so that a "cached plan" (which is rather a misnomer
at this point) can support generation of custom, parameter-value-dependent
plans, and can make an intelligent choice between using custom plans and
the traditional generic-plan approach. The specific choice algorithm
implemented here can probably be improved in future, but this commit is
all about getting the mechanism in place, not the policy.
In addition, restructure the API to greatly reduce the amount of extraneous
data copying needed. The main compromise needed to make that possible was
to split the initial creation of a CachedPlanSource into two steps. It's
worth noting in particular that SPI_saveplan is now deprecated in favor of
SPI_keepplan, which accomplishes the same end result with zero data
copying, and no need to then spend even more cycles throwing away the
original SPIPlan. The risk of long-term memory leaks while manipulating
SPIPlans has also been greatly reduced. Most of this improvement is based
on use of the recently-added MemoryContextSetParent primitive.
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Module initialization functions in Python 3 must have external
linkage, because PyMODINIT_FUNC does dllexport on Windows-like
platforms. Without this change, the build with Python 3 fails on
Windows.
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Dropped columns within a composite type were not handled correctly.
Also, we did not check for whether a composite result type had changed
since we cached the information about it.
Jan Urbański, per a bug report from Jean-Baptiste Quenot
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To avoid having the python headers hijack various definitions,
we now include them after all the system headers we want, having
first undefined some of the things they want to define. After that's
done we restore the things they scribbled on that matter, namely our
snprintf and vsnprintf macros, if we're using them.
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There may be some other places where we should use errdetail_internal,
but they'll have to be evaluated case-by-case. This commit just hits
a bunch of places where invoking gettext is obviously a waste of cycles.
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This lets us stop including rel.h into execnodes.h, which is a widely
used header.
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Per suggestion from Josh Kupershmidt.
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Certain subdirectories do not get built if corresponding options are not
selected at configure time. However, "make distprep" should visit such
directories anyway, so that constructing derived files to be included in
the tarball happens without requiring all configure options to be given
in the tarball build script. Likewise, it's better if cleanup actions
unconditionally visit all directories (for example, this ensures proper
cleanup if someone has done a manual make in such a subdirectory).
To handle this, set up a convention that subdirectories that are
conditionally included in SUBDIRS should be added to ALWAYS_SUBDIRS
instead when they are excluded.
Back-patch to 9.1, so that plpython's spiexceptions.h will get provided
in 9.1 tarballs. There don't appear to be any instances where distprep
actions got missed in previous releases, and anyway this fix requires
gmake 3.80 so we don't want to apply it before 9.1.
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The --flag argument can be used to tell xgettext the arguments of
which functions should be flagged with c-format in the PO files,
instead of guessing based on the presence of format specifiers, which
fails if no format specifiers are present but the translation
accidentally introduces one.
Appropriate flag settings have been added for each message catalog.
based on a patch by Christoph Berg for bug #6066
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Put gettext trigger words that are common to the backend and backend
modules into a makefile variable to include everywhere, to avoid
error-prone repetitions.
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It currently doesn't make a difference, but it's inconsistent with
most other usage, and it might interfere with a future patch, so I'll
change it all in a separate commit.
Also, replace tabs with spaces for alignment.
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Add "|| exit" so that the rule aborts when a command fails.
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install-sh can install multiple files at once, so for loops are not
necessary. This was already changed for the rest of the code some
time ago, but pgxs.mk was apparently forgotten, and the obsolete
coding style has now been copied to the PLs as well.
This also fixes the problem that the for loops in question did not
catch errors.
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printf type functions.
The style is set to "printf" for backwards compatibility everywhere except
on Windows, where it is set to "gnu_printf", which eliminates hundreds of
false error messages from modern versions of gcc arising from %m and %ll{d,u}
formats.
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It assumed that the lineno from the traceback always refers to the
PL/Python function. If you created a PL/Python function that imports
some code, runs it, and that code raises an exception, PLy_traceback
would get utterly confused.
Now we look at the file name reported with the traceback and only
print the source line if it came from the PL/Python function.
Jan Urbański
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This will (hopefully) eliminate the need for the
plpython_unicode_0.out expected file.
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Jan Urbański
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This mimics the traceback information the Python interpreter prints
with exceptions.
Jan Urbański
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blocks.
Investigation by Jan Urbański, though I didn't use his patch.
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Report and patch from Daniel Popowich, bug #5842
(with some debugging help from Alex Hunsaker)
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It should cause a elog(FATAL) error, and it fact it was simply causing
a elog(ERROR).
Jan Urbański
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This improves reporting, as the error string now includes the actual
Python exception. As a side effect, this no longer sets the errcode to
ERRCODE_DATA_EXCEPTION, which might be considered a feature, as it's
not documented and not clear why iterator errors should be treated
differently.
Jan Urbański
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Seen with an older gcc version. I'm not sure these represent any real
risk factor, but still a bit scary. Anyway we have lots of other
volatile-marked variables in this code, so a couple more won't hurt.
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The original scheme for this was to symlink plpython.$DLSUFFIX to
plpython2.$DLSUFFIX, but that doesn't work on Windows, and only
accidentally failed to fail because of the way that CREATE LANGUAGE created
or didn't create new C functions. My changes of yesterday exposed the
weakness of that approach. To fix, get rid of the symlink and make
pg_pltemplate show what's really going on.
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This mostly just involves creating control, install, and
update-from-unpackaged scripts for them. However, I had to adjust plperl
and plpython to not share the same support functions between variants,
because we can't put the same function into multiple extensions.
catversion bump forced due to new contents of pg_pltemplate, and because
initdb now installs plpgsql as an extension not a bare language.
Add support for regression testing these as extensions not bare
languages.
Fix a couple of other issues that popped up while testing this: my initial
hack at pg_dump binary-upgrade support didn't work right, and we don't want
an extra schema permissions test after all.
Documentation changes still to come, but I'm committing now to see
whether the MSVC build scripts need work (likely they do).
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Mostly text supplied by Jan Urbański.
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Patch from Jan Urbański.
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plpython_subtransaction test needs a separate expected file
specifically for Python 2.5.
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This provides a separate exception class for each error code that the
backend defines, as well as the ability to get the SQLSTATE from the
exception object.
Jan Urbański, reviewed by Steve Singer
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Adds a context manager, obtainable by plpy.subtransaction(), to run a
group of statements in a subtransaction.
Jan Urbański, reviewed by Steve Singer, additional scribbling by me
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We don't have complete expected coverage for Python 2.2 anyway, so it
doesn't seem worth keeping this one around that no one appears to be
updating anyway. Visual inspection of the differences ought to be
good enough for those few who care about this obsolete Python version.
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This allows functions with multiple OUT parameters returning both one
or multiple records (RECORD or SETOF RECORD).
Jan Urbański, reviewed by Hitoshi Harada
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Add functions plpy.quote_ident, plpy.quote_literal,
plpy.quote_nullable, which wrap the equivalent SQL functions.
To be able to propagate char * constness properly, make the argument
of quote_literal_cstr() const char *. This also makes it more
consistent with quote_identifier().
Jan Urbański, reviewed by Hitoshi Harada, some refinements by Peter
Eisentraut
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type changes.
The invalidation will cause the type information to be refetched, and
everything will work.
Jan Urbański, reviewed by Alex Hunsaker
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The first argument of PyEval_EvalCode() was changed from PyCodeObject*
to PyObject* because of PEP 384.
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Also add make check-world target, and refactor pg_regress invocation
code in makefiles a bit.
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This allows the language-specific try/catch construct to catch and
handle exceptions arising from SPI calls, matching the behavior of
other PLs.
As an additional bonus you no longer get all the ugly "unrecognized
error in PLy_spi_execute_query" errors.
Jan Urbański, reviewed by Steve Singer
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Jan Urbański, reviewed by Hitoshi Harada
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