rdelaage
/
postgresql
mirror of https://git.postgresql.org/git/postgresql.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
12,162 Commits 36 Branches 606 Tags 423 MiB
C 86%
PLpgSQL 5.5%
Perl 4.1%
Yacc 1.3%
Makefile 0.7%
Other 2.3%
Go to file
Bruce Momjian 7ab7467318 I've attached a patch which implements Bob Jenkin's hash function for 
PostgreSQL. This hash function replaces the one used by hash indexes and
the catalog cache. Hash joins use a different, relatively poor-quality
hash function, but I'll fix that later.

As suggested by Tom Lane, this patch also changes the size of the fixed
hash table used by the catalog cache to be a power-of-2 (instead of a
prime: I chose 256 instead of 257). This allows the catcache to lookup
hash buckets using a simple bitmask. This should improve the performance
of the catalog cache slightly, since the previous method (modulo a
prime) was slow.

In my tests, this improves the performance of hash indexes by between 4%
and 8%; the performance when using btree indexes or seqscans is
basically unchanged.

Neil Conway <neilconway@rogers.com>
 		2002-03-06 20:49:46 +00:00
config Heimdal support (Kerberos V implementation from KTH) 2002-02-23 04:17:47 +00:00
contrib This simple patch fixes broken Makefile, broken ApplySnapshot and 2002-03-06 20:41:36 +00:00
doc alter table doc cleanups. 2002-03-06 20:42:38 +00:00
src I've attached a patch which implements Bob Jenkin's hash function for 2002-03-06 20:49:46 +00:00
COPYRIGHT Better formatting 2001-12-19 18:53:47 +00:00
GNUmakefile.in /doc/src -> /doc for Peter. 2001-11-21 23:19:25 +00:00
HISTORY Consistend spelling for PL/pgSQL 2002-01-31 21:20:03 +00:00
INSTALL Rebuild from source. 2002-01-31 00:46:26 +00:00
Makefile Restructure the key include files per recent pghackers discussion: there 2001-02-10 02:31:31 +00:00
README New edition 2001-12-19 18:53:58 +00:00
aclocal.m4 Put the right runpath to libpq into the Perl module shared object on more 2001-08-26 22:28:04 +00:00
configure Autoconf for jdbc debug changes. 2002-03-05 17:55:45 +00:00
configure.in At this moment, --enable-debug adds debugging information to most of the 2002-03-05 17:55:23 +00:00
register.txt Stamp 7.2 for release. 2002-02-03 21:00:09 +00:00

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 several language
bindings, including C, C++, Perl, Python, and Tcl, as well as drivers
for JDBC and ODBC.

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
ftp://ftp.postgresql.org/pub/.  For more information look at our web
site located at http://www.postgresql.org/.