Tom Lane e2159f3842 Teach the planner to remove SubqueryScan nodes from the plan if they ... aren't doing anything useful (ie, neither selection nor projection). Also, extend to SubqueryScan the hacks already in place to avoid unnecessary ExecProject calls when the result would just be the same tuple the subquery already delivered. This saves some overhead in UNION and other set operations, as well as avoiding overhead for unflatten-able subqueries. Per example from Sokolov Yura.		2005-05-22 22:30:20 +00:00
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access	Add support for wal_fsync_writethrough for Darwin, and restructure the	2005-05-20 14:53:26 +00:00
bootstrap	For some reason access/tupmacs.h has been #including utils/memutils.h,	2005-05-06 17:24:55 +00:00
catalog	Split the shared-memory array of PGPROC pointers out of the sinval	2005-05-19 21:35:48 +00:00
commands	Split the shared-memory array of PGPROC pointers out of the sinval	2005-05-19 21:35:48 +00:00
executor	Teach the planner to remove SubqueryScan nodes from the plan if they	2005-05-22 22:30:20 +00:00
lib	Replace the use of "0" with "NULL" where appropriate in dllist.c, for	2005-01-18 22:59:32 +00:00
libpq	Finish up the flat-files project: get rid of GetRawDatabaseInfo() hack	2005-02-26 18:43:34 +00:00
main	Tag appropriate files for rc3	2004-12-31 22:04:05 +00:00
nodes	Modify tidbitmap.c to avoid creating a hash table until there is more	2005-05-17 00:43:47 +00:00
optimizer	Teach the planner to remove SubqueryScan nodes from the plan if they	2005-05-22 22:30:20 +00:00
parser	Add COPY WITH CVS HEADER to allow a heading line as the first line in	2005-05-07 02:22:49 +00:00
po	Translation updates	2005-01-17 20:27:44 +00:00
port	Refactor fork()-related code. We need to do various housekeeping tasks	2005-03-10 07:14:03 +00:00
postmaster	Rename Rendezvous to Bonjour to match OS/X renaming.	2005-05-15 00:26:19 +00:00
regex	Install Tcl regex fixes to sync our regex engine with Tcl 8.4.8 (up from	2004-11-24 22:56:54 +00:00
rewrite	Implement sharable row-level locks, and use them for foreign key references	2005-04-28 21:47:18 +00:00
storage	Add support for wal_fsync_writethrough for Darwin, and restructure the	2005-05-20 14:53:26 +00:00
tcop	Change CREATE TYPE to require datatype output and send functions to have	2005-05-01 18:56:19 +00:00
utils	Remove excess parens, use Abs instead of : ?.	2005-05-21 03:38:05 +00:00
Makefile	On Windows, set the postmaster executable's stack size to 4MB, so that	2005-01-26 21:55:26 +00:00
nls.mk	New translation	2005-01-09 17:10:29 +00:00