Tom Lane 6d2c8c0e2a Drop cheap-startup-cost paths during add_path() if we don't need them. ... We can detect whether the planner top level is going to care at all about cheap startup cost (it will only do so if query_planner's tuple_fraction argument is greater than zero). If it isn't, we might as well discard paths immediately whose only advantage over others is cheap startup cost. This turns out to get rid of quite a lot of paths in complex queries --- I saw planner runtime reduction of more than a third on one large query. Since add_path isn't currently passed the PlannerInfo "root", the easiest way to tell it whether to do this was to add a bool flag to RelOptInfo. That's a bit redundant, since all relations in a given query level will have the same setting. But in the future it's possible that we'd refine the control decision to work on a per-relation basis, so this seems like a good arrangement anyway. Per my suggestion of a few months ago.		2012-09-01 18:16:24 -04:00
..
access	Split tuple struct defs from htup.h to htup_details.h	2012-08-30 16:52:35 -04:00
bootstrap	Fix management of pendingOpsTable in auxiliary processes.	2012-07-18 15:28:10 -04:00
catalog	Collect and use histograms of lower and upper bounds for range types.	2012-08-27 15:58:46 +03:00
commands	Split heapam_xlog.h from heapam.h	2012-08-28 19:02:00 -04:00
datatype	Run pgindent on 9.2 source tree in preparation for first 9.3	2012-06-10 15:20:04 -04:00
executor	Split tuple struct defs from htup.h to htup_details.h	2012-08-30 16:52:35 -04:00
foreign	Run pgindent on 9.2 source tree in preparation for first 9.3	2012-06-10 15:20:04 -04:00
lib	Run pgindent on 9.2 source tree in preparation for first 9.3	2012-06-10 15:20:04 -04:00
libpq	Support having multiple Unix-domain sockets per postmaster.	2012-08-10 17:27:15 -04:00
mb	Fix bogus macro definition.	2012-07-10 22:36:11 -04:00
nodes	Drop cheap-startup-cost paths during add_path() if we don't need them.	2012-09-01 18:16:24 -04:00
optimizer	Suppress creation of backwardly-indexed paths for LATERAL join clauses.	2012-08-30 14:33:00 -04:00
parser	Allow OLD and NEW in multi-row VALUES within rules.	2012-08-19 14:12:16 -04:00
port	Run pgindent on 9.2 source tree in preparation for first 9.3	2012-06-10 15:20:04 -04:00
portability	Update copyright notices for year 2012.	2012-01-01 18:01:58 -05:00
postmaster	Support having multiple Unix-domain sockets per postmaster.	2012-08-10 17:27:15 -04:00
regex	Re-implement extraction of fixed prefixes from regular expressions.	2012-07-10 14:54:37 -04:00
replication	syncrep.h must include xlogdefs.h	2012-08-28 09:46:08 -04:00
rewrite	Centralize the logic for detecting misplaced aggregates, window funcs, etc.	2012-08-10 11:36:15 -04:00
snowball	Run pgindent on 9.2 source tree in preparation for first 9.3	2012-06-10 15:20:04 -04:00
storage	Improve coding around the fsync request queue.	2012-07-17 16:56:54 -04:00
tcop	Make new event trigger facility actually do something.	2012-07-20 11:39:01 -04:00
tsearch	Replace int2/int4 in C code with int16/int32	2012-06-25 01:51:46 +03:00
utils	Split tuple struct defs from htup.h to htup_details.h	2012-08-30 16:52:35 -04:00
.gitignore	Convert cvsignore to gitignore, and add .gitignore for build targets.	2010-09-22 12:57:04 +02:00
c.h	Replace int2/int4 in C code with int16/int32	2012-06-25 01:51:46 +03:00
fmgr.h	Update copyright notices for year 2012.	2012-01-01 18:01:58 -05:00
funcapi.h	Update copyright notices for year 2012.	2012-01-01 18:01:58 -05:00
getaddrinfo.h	Update copyright notices for year 2012.	2012-01-01 18:01:58 -05:00
getopt_long.h	Update copyright notices for year 2012.	2012-01-01 18:01:58 -05:00
Makefile	Fix server header file installation with vpath builds	2011-11-10 20:52:54 +02:00
miscadmin.h	Support having multiple Unix-domain sockets per postmaster.	2012-08-10 17:27:15 -04:00
pg_config.h.in	Make configure probe for mbstowcs_l as well as wcstombs_l.	2012-08-31 14:17:56 -04:00
pg_config.h.win32	Make configure probe for mbstowcs_l as well as wcstombs_l.	2012-08-31 14:17:56 -04:00
pg_config_manual.h	Run pgindent on 9.2 source tree in preparation for first 9.3	2012-06-10 15:20:04 -04:00
pg_trace.h	Run pgindent on 9.2 source tree in preparation for first 9.3	2012-06-10 15:20:04 -04:00
pgstat.h	Unify calling conventions for postgres/postmaster sub-main functions	2012-06-25 21:30:12 +03:00
pgtime.h	Update copyright notices for year 2012.	2012-01-01 18:01:58 -05:00
port.h	Make new event trigger facility actually do something.	2012-07-20 11:39:01 -04:00
postgres.h	Run pgindent on 9.2 source tree in preparation for first 9.3	2012-06-10 15:20:04 -04:00
postgres_ext.h	Remove cvs keywords from all files.	2010-09-20 22:08:53 +02:00
postgres_fe.h	Update copyright notices for year 2012.	2012-01-01 18:01:58 -05:00
rusagestub.h	Update copyright notices for year 2012.	2012-01-01 18:01:58 -05:00
windowapi.h	Update copyright notices for year 2012.	2012-01-01 18:01:58 -05:00