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Andrew Dunstan 1bb619d4d6 Cache by-reference missing values in a long lived context 
Attribute missing values might be needed past the lifetime of the tuple
descriptors from which they are extracted. To avoid possibly using
pointers for by-reference values which might thus be left dangling, we
cache a datumCopy'd version of the datum in the TopMemoryContext. Since
we first search for the value this only needs to be done once per
session for any such value.

Original complaint from Tom Lane, idea for mitigation by Andrew Dunstan,
tweaked by Tom Lane.

Backpatch to version 11 where missing values were introduced.

Discussion: https://postgr.es/m/1306569.1687978174@sss.pgh.pa.us
2023-08-22 15:15:31 -04:00
..
editors Make Emacs perl-mode indent more like perltidy. 2019-01-13 11:32:31 -08:00
findoidjoins Move connect.h from fe_utils to src/include/common. 2020-08-10 09:22:58 -07:00
ifaddrs Update copyrights for 2020 2020-01-01 12:21:45 -05:00
make_diff Remove useless whitespace at end of lines 2010-11-23 22:34:55 +02:00
msvc Define OPENSSL_API_COMPAT 2023-06-24 20:22:57 +09:00
perlcheck Stop requiring an explicit return from perl subroutines 2020-04-14 16:55:34 -04:00
pginclude Use perl warnings pragma consistently 2020-04-13 11:55:45 -04:00
pgindent Cache by-reference missing values in a long lived context 2023-08-22 15:15:31 -04:00
ccsym tools/ccsym: update for modern versions of gcc 2015-01-20 13:02:58 -05:00
check_bison_recursion.pl Update copyrights for 2020 2020-01-01 12:21:45 -05:00
codelines Fix remaining stray references to CVS. 2010-09-22 19:51:39 -04:00
copyright.pl Remove libpq.rc, use win32ver.rc for libpq 2020-01-15 15:06:12 +01:00
find_badmacros Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
find_static Fix omission of -X (--no-psqlrc) in some psql invocations. 2015-12-28 11:46:43 -05:00
find_typedef Refer to OS X as "macOS", except for the port name which is still "darwin". 2016-09-25 15:40:57 -04:00
fix-old-flex-code.pl Use perl warnings pragma consistently 2020-04-13 11:55:45 -04:00
gen_keywordlist.pl Update copyrights for 2020 2020-01-01 12:21:45 -05:00
git-external-diff Preserve information on use of git-external-diff 2018-05-24 23:45:31 +09:30
git_changelog git_changelog: use modern format for rel branch names in example 2020-04-24 15:16:07 -04:00
make_ctags Improve missing-program error handling in make_ctags and make_etags. 2019-01-13 13:33:50 -05:00
make_etags Improve missing-program error handling in make_ctags and make_etags. 2019-01-13 13:33:50 -05:00
make_mkid Add another pgdefine path check, and a cvs-git change. 2011-08-26 21:52:35 -04:00
PerfectHash.pm Update copyrights for 2020 2020-01-01 12:21:45 -05:00
pgtest pgtest: run clean, build, and check stages separately 2018-07-28 15:34:06 -04:00
RELEASE_CHANGES Update oidjoins regression test for v13. 2020-05-09 13:05:08 -04:00
testint128.c Update copyrights for 2020 2020-01-01 12:21:45 -05:00
valgrind.supp Avoid need for valgrind suppressions for pg_atomic_init_u64 on some platforms. 2020-06-08 20:02:49 -07:00
version_stamp.pl Initial pgindent and pgperltidy run for v13. 2020-05-14 13:06:50 -04:00
win32tzlist.pl Update Windows timezone name list to include currently-known zones. 2020-04-24 17:53:23 -04:00