Tom Lane d26559dbf3 Teach tuplesort.c about "top N" sorting, in which only the first N tuples ... need be returned. We keep a heap of the current best N tuples and sift-up new tuples into it as we scan the input. For M input tuples this means only about M*log(N) comparisons instead of M*log(M), not to mention a lot less workspace when N is small --- avoiding spill-to-disk for large M is actually the most attractive thing about it. Patch includes planner and executor support for invoking this facility in ORDER BY ... LIMIT queries. Greg Stark, with some editorialization by moi.		2007-05-04 01:13:45 +00:00
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backend	Teach tuplesort.c about "top N" sorting, in which only the first N tuples	2007-05-04 01:13:45 +00:00
bin	Another tweak for tab completion of CREATE TEMP. Instead of only	2007-04-26 22:25:56 +00:00
include	Teach tuplesort.c about "top N" sorting, in which only the first N tuples	2007-05-04 01:13:45 +00:00
interfaces	Removed non-existant function from extern.h	2007-04-27 07:55:14 +00:00
makefiles	Add $(CFLAGS) to the simplified build rule for .so libraries on Darwin.	2006-11-28 05:45:43 +00:00
pl	Support for MOVE in PL/PgSQL. Initial patch from Magnus, some improvements	2007-04-29 01:21:09 +00:00
port	Silence mingw compiler warning	2007-04-18 08:32:40 +00:00
template	Make --with-ldap build on Unixware, per Olivier Prenant.	2006-12-14 21:49:54 +00:00
test	Fix a thinko in my patch of a couple months ago for bug #3116: it did the	2007-05-01 18:53:52 +00:00
timezone	Sync timezone data with 2007e zic release.	2007-04-19 22:44:32 +00:00
tools	Release builds generate different strangely formatted export names	2007-05-03 14:04:03 +00:00
tutorial	Replace direct assignments to VARATT_SIZEP(x) with SET_VARSIZE(x, len).	2007-02-27 23:48:10 +00:00
bcc32.mak	Remove old-style win32 client-only visual c++ build infrastructure for everything except	2007-03-05 14:18:38 +00:00
DEVELOPERS	Testing commit stuff	2006-07-10 15:50:02 +00:00
Makefile	Remove remains of old depend target.	2007-01-20 17:16:17 +00:00
Makefile.global.in	Contrib module uuid-ossp for generating UUID values using the OSSP UUID	2007-04-21 17:26:18 +00:00
Makefile.shlib	Change $(CC) to $(COMPILER) on Solaris gcc so -m64 is passed into the	2007-02-20 22:45:57 +00:00
nls-global.mk	When merging PO files, take into consideration translations in other PO	2006-04-05 13:40:15 +00:00
win32.mak	Remove old-style win32 client-only visual c++ build infrastructure for everything except	2007-03-05 14:18:38 +00:00