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Tom Lane e6336b8b57 Save a few cycles in advance_transition_function(). Keep a pre-initialized FunctionCallInfoData in AggStatePerAggData, and re-use that at each row instead of doing InitFunctionCallInfoData each time. This saves only half a dozen assignments and maybe some stack manipulation, and yet that seems to be good for a percent or two of the overall query run time for simple aggregates such as count(*). The cost is that the FunctionCallInfoData (which is about a kilobyte, on 64-bit machines) stays allocated for the duration of the query instead of being short-lived stack data. But we're already paying an equivalent space cost for each regular FuncExpr or OpExpr node, so I don't feel bad about paying it for aggregate functions. The code seems a little cleaner this way too, since the number of things passed to advance_transition_function decreases.		2014-01-08 13:58:37 -05:00
config	Remove maintainer-check target, fold into normal build	2013-10-10 20:11:56 -04:00
contrib	pg_upgrade: Fix fatal error handling	2014-01-08 07:01:16 -05:00
doc	Update copyright for 2014	2014-01-07 16:05:30 -05:00
src	Save a few cycles in advance_transition_function().	2014-01-08 13:58:37 -05:00
.dir-locals.el	Update Emacs configuration	2013-08-13 20:08:44 -04:00
.gitattributes	gitattributes: Make syntax compatible with older Git versions	2013-11-12 21:58:46 -05:00
.gitignore	Add *.pot to .gitignore	2013-10-19 10:56:52 -04:00
COPYRIGHT	Update copyright for 2014	2014-01-07 16:05:30 -05:00
GNUmakefile.in	Remove maintainer-check target, fold into normal build	2013-10-10 20:11:56 -04:00
Makefile	Allow make check in PL directories	2011-02-15 06:52:12 +02:00
README	Remove useless whitespace at end of lines	2010-11-23 22:34:55 +02:00
README.git	Fix doc links in README file to work with new website layout	2013-11-12 12:53:32 +01:00
aclocal.m4	Remove cvs keywords from all files.	2010-09-20 22:08:53 +02:00
configure	Update copyright for 2014	2014-01-07 16:05:30 -05:00
configure.in	Update copyright for 2014	2014-01-07 16:05:30 -05:00

README

PostgreSQL Database Management System
=====================================

This directory contains the source code distribution of the PostgreSQL
database management system.

PostgreSQL is an advanced object-relational database management system
that supports an extended subset of the SQL standard, including
transactions, foreign keys, subqueries, triggers, user-defined types
and functions.  This distribution also contains C language bindings.

PostgreSQL has many language interfaces, many of which are listed here:

	http://www.postgresql.org/download

See the file INSTALL for instructions on how to build and install
PostgreSQL.  That file also lists supported operating systems and
hardware platforms and contains information regarding any other
software packages that are required to build or run the PostgreSQL
system.  Changes between all PostgreSQL releases are recorded in the
file HISTORY.  Copyright and license information can be found in the
file COPYRIGHT.  A comprehensive documentation set is included in this
distribution; it can be read as described in the installation
instructions.

The latest version of this software may be obtained at
http://www.postgresql.org/download/.  For more information look at our
web site located at http://www.postgresql.org/.