Tom Lane 57664ed25e Wrap appendrel member outputs in PlaceHolderVars in additional cases. ... Add PlaceHolderVar wrappers as needed to make UNION ALL sub-select output expressions appear non-constant and distinct from each other. This makes the world safe for add_child_rel_equivalences to do what it does. Before, it was possible for that function to add identical expressions to different EquivalenceClasses, which logically should imply merging such ECs, which would be wrong; or to improperly add a constant to an EquivalenceClass, drastically changing its behavior. Per report from Teodor Sigaev. The only currently known consequence of this bug is "MergeAppend child's targetlist doesn't match MergeAppend" planner failures in 9.1 and later. I am suspicious that there may be other failure modes that could affect older release branches; but in the absence of any hard evidence, I'll refrain from back-patching further than 9.1.		2011-11-08 21:14:21 -05:00
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backend	Wrap appendrel member outputs in PlaceHolderVars in additional cases.	2011-11-08 21:14:21 -05:00
bin	Show statistics target for columns in \d+ on a table	2011-11-05 13:02:48 +01:00
include	Wrap appendrel member outputs in PlaceHolderVars in additional cases.	2011-11-08 21:14:21 -05:00
interfaces	Clean up whitespace and indentation in parser and scanner files	2011-11-01 21:51:30 +02:00
makefiles	Fix pgxs.mk to always add --dbname=$(CONTRIB_TESTDB) to REGRESS_OPTS.	2011-08-24 15:16:50 -04:00
pl	Support range data types.	2011-11-03 13:42:15 +02:00
port	Fix typo in pg_srand48 (srand48 in older branches).	2011-09-03 16:17:34 -04:00
template	Remove cvs keywords from all files.	2010-09-20 22:08:53 +02:00
test	Wrap appendrel member outputs in PlaceHolderVars in additional cases.	2011-11-08 21:14:21 -05:00
timezone	Update docs to point to the timezone library's new home at IANA.	2011-10-27 23:09:05 -04:00
tools	Add simple script to check for right recursion in Bison grammars.	2011-10-27 13:50:57 -04:00
tutorial	Stamp copyrights for year 2011.	2011-01-01 13:18:15 -05:00
.gitignore	Convert cvsignore to gitignore, and add .gitignore for build targets.	2010-09-22 12:57:04 +02:00
bcc32.mak	Remove useless whitespace at end of lines	2010-11-23 22:34:55 +02:00
DEVELOPERS	Replace a couple of references to files that no longer exist in the source	2009-05-04 08:08:47 +00:00
Makefile	Fix some oversights in distprep and maintainer-clean targets.	2011-03-10 00:04:05 -05:00
Makefile.global.in	Make distprep and *clean build targets recurse into all subdirectories.	2011-07-03 13:55:12 -04:00
Makefile.shlib	Use single quotes in preference to double quotes for protecting pathnames.	2011-06-15 21:45:23 -04:00
nls-global.mk	Add the possibility to pass --flag arguments to xgettext calls	2011-06-27 00:37:21 +03:00
win32.mak	Remove useless whitespace at end of lines	2010-11-23 22:34:55 +02:00