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Tom Lane 7097e6c4a4 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.		14 years ago
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access	Don't assume that a tuple's header size is unchanged during toasting.	14 years ago
bootstrap	Capitalization fixes	15 years ago
catalog	More cleanup after failed reduced-lock-levels-for-DDL feature.	14 years ago
commands	Change FK trigger creation order to better support self-referential FKs.	14 years ago
executor	Fix handling of PlaceHolderVars in nestloop parameter management.	14 years ago
foreign	deflist_to_tuplestore dumped core on an option with no value.	15 years ago
lib	Stamp copyrights for year 2011.	15 years ago
libpq	Add host name resolution information to pg_hba.conf error messages	15 years ago
main	Pgindent run before 9.1 beta2.	15 years ago
nodes	Don't trust deferred-unique indexes for join removal.	14 years ago
optimizer	Wrap appendrel member outputs in PlaceHolderVars in additional cases.	14 years ago
parser	Don't let transform_null_equals=on affect CASE foo WHEN NULL ... constructs.	14 years ago
po	Translation updates	15 years ago
port	Back-patch assorted latch-related fixes.	15 years ago
postmaster	Fix pg_upgrade for EXEC_BACKEND builds (e.g. Windows) by properly	14 years ago
regex	Pgindent run before 9.1 beta2.	15 years ago
replication	Fix overly-complicated usage of errcode_for_file_access().	14 years ago
rewrite	Finish disabling reduced-lock-levels-for-DDL feature.	15 years ago
snowball	Stamp copyrights for year 2011.	15 years ago
storage	Derive oldestActiveXid at correct time for Hot Standby.	14 years ago
tcop	Back-patch assorted latch-related fixes.	15 years ago
tsearch	Pgindent run before 9.1 beta2.	15 years ago
utils	Make DatumGetInetP() unpack inet datums with a 1-byte header, and add	14 years ago
.gitignore	Add gitignore for mingw/cygwin build outputs	15 years ago
Makefile	Fix symlink for errcodes.h so it works in VPATH builds from tarballs.	15 years ago
common.mk	Workaround for recursive make breakage	15 years ago
nls.mk	Translation updates	15 years ago