postgresql/contrib
Tom Lane fd785441ff When using the OSSP UUID library, cache its uuid_t state object.
The original coding in contrib/uuid-ossp created and destroyed a uuid_t
object (or, in some cases, even two of them) each time it was called.
This is not the intended usage: you're supposed to keep the uuid_t object
around so that the library can cache its state across uses.  (Other UUID
libraries seem to keep equivalent state behind-the-scenes in static
variables, but OSSP chose differently.)  Aside from being quite inefficient,
creating a new uuid_t loses knowledge of the previously generated UUID,
which in theory could result in duplicate V1-style UUIDs being created
on sufficiently fast machines.

On at least some platforms, creating a new uuid_t also draws some entropy
from /dev/urandom, leaving less for the rest of the system.  This seems
sufficiently unpleasant to justify back-patching this change.
2014-05-29 13:51:18 -04:00
..
adminpack Convert cvsignore to gitignore, and add .gitignore for build targets. 2010-09-22 12:57:08 +02:00
auto_explain 8.4 pgindent run, with new combined Linux/FreeBSD/MinGW typedef list 2009-06-11 14:49:15 +00:00
btree_gin Some more gitignore cleanups: cover contrib and PL regression test outputs. 2010-09-22 17:23:00 -04:00
btree_gist Initialize padding bytes in btree_gist varbit support. 2014-05-13 15:27:43 +03:00
chkpass Prevent potential overruns of fixed-size buffers. 2014-02-17 11:20:38 -05:00
citext Some more gitignore cleanups: cover contrib and PL regression test outputs. 2010-09-22 17:23:00 -04:00
cube Revert "Fix bogus %name-prefix option syntax in all our Bison files." 2014-05-28 19:30:15 -04:00
dblink Remove tabs after spaces in C comments 2014-05-06 11:26:24 -04:00
dict_int Fix bogus code in contrib/ tsearch dictionary examples. 2011-11-03 19:18:04 -04:00
dict_xsyn Fix bogus code in contrib/ tsearch dictionary examples. 2011-11-03 19:18:04 -04:00
earthdistance Remove tabs after spaces in C comments 2014-05-06 11:26:24 -04:00
fuzzystrmatch Convert cvsignore to gitignore, and add .gitignore for build targets. 2010-09-22 12:57:08 +02:00
hstore Some more gitignore cleanups: cover contrib and PL regression test outputs. 2010-09-22 17:23:00 -04:00
intagg Reduce contrib/intagg to a thin wrapper around the new core functions 2008-11-14 19:58:45 +00:00
intarray Remove tabs after spaces in C comments 2014-05-06 11:26:24 -04:00
isn Fix calculation of ISMN check digit. 2014-01-13 15:44:14 +02:00
lo Defend against bad trigger definitions in contrib/lo's lo_manage() trigger. 2013-11-23 22:46:21 -05:00
ltree Remove tabs after spaces in C comments 2014-05-06 11:26:24 -04:00
oid2name Remove tabs after spaces in C comments 2014-05-06 11:26:24 -04:00
pageinspect Take buffer lock while inspecting btree index pages in contrib/pageinspect. 2012-11-30 17:02:48 -05:00
pg_buffercache Convert cvsignore to gitignore, and add .gitignore for build targets. 2010-09-22 12:57:08 +02:00
pg_freespacemap Convert cvsignore to gitignore, and add .gitignore for build targets. 2010-09-22 12:57:08 +02:00
pg_standby Properly check for readdir/closedir() failures 2014-03-21 13:45:11 -04:00
pg_stat_statements Remove tabs after spaces in C comments 2014-05-06 11:26:24 -04:00
pg_trgm Fix possible buffer overrun in contrib/pg_trgm. 2014-01-13 13:07:26 -05:00
pgbench Convert cvsignore to gitignore, and add .gitignore for build targets. 2010-09-22 12:57:08 +02:00
pgcrypto Remove tabs after spaces in C comments 2014-05-06 11:26:24 -04:00
pgrowlocks Convert cvsignore to gitignore, and add .gitignore for build targets. 2010-09-22 12:57:08 +02:00
pgstattuple Remove tabs after spaces in C comments 2014-05-06 11:26:24 -04:00
seg Revert "Fix bogus %name-prefix option syntax in all our Bison files." 2014-05-28 19:30:15 -04:00
spi Remove tabs after spaces in C comments 2014-05-06 11:26:24 -04:00
sslinfo Remove tabs after spaces in C comments 2014-05-06 11:26:24 -04:00
start-scripts Remove inappropriate cd commands, per David Wheeler. Also make 2008-01-16 21:00:25 +00:00
tablefunc Some more gitignore cleanups: cover contrib and PL regression test outputs. 2010-09-22 17:23:00 -04:00
test_parser Fix one-byte buffer overrun in contrib/test_parser. 2012-01-09 19:57:46 -05:00
tsearch2 Some more gitignore cleanups: cover contrib and PL regression test outputs. 2010-09-22 17:23:00 -04:00
uuid-ossp When using the OSSP UUID library, cache its uuid_t state object. 2014-05-29 13:51:18 -04:00
vacuumlo Remove tabs after spaces in C comments 2014-05-06 11:26:24 -04:00
xml2 Prevent access to external files/URLs via contrib/xml2's xslt_process(). 2012-08-14 18:32:44 -04:00
Makefile Add btree_gin contrib module. 2009-03-25 23:20:01 +00:00
README Add btree_gin contrib module. 2009-03-25 23:20:01 +00:00
contrib-global.mk Some marginal tweaks to make 'make installcheck' mostly work when 2005-09-27 17:43:31 +00:00

README

The PostgreSQL contrib tree
---------------------------

This subtree contains porting tools, analysis utilities, and plug-in
features that are not part of the core PostgreSQL system, mainly because
they address a limited audience or are too experimental to be part of
the main source tree.  This does not preclude their usefulness.

User documentation for each module appears in the main SGML documentation.

Most items can be built with `gmake all' and installed with
`gmake install' in the usual fashion, after you have run the `configure'
script in the top-level directory.  Some directories supply new
user-defined functions, operators, or types.  In these cases, after you have
installed the files you need to register the new entities in the database
system by running the commands in the supplied .sql file.  For example,

	$ psql -d dbname -f module.sql

See the PostgreSQL documentation for more information about this
procedure.


Index:
------

adminpack -
	File and log manipulation routines, used by pgAdmin
	by Dave Page <dpage@vale-housing.co.uk>

auto_explain -
	Log EXPLAIN output for long-running queries
	by Takahiro Itagaki <itagaki.takahiro@oss.ntt.co.jp>

btree_gin -
	Support for emulating BTREE indexing in GIN
	by Oleg Bartunov <oleg@sai.msu.su> and Teodor Sigaev <teodor@sigaev.ru>

btree_gist -
	Support for emulating BTREE indexing in GiST
	by Oleg Bartunov <oleg@sai.msu.su> and Teodor Sigaev <teodor@sigaev.ru>

chkpass -
	An auto-encrypted password datatype
	by D'Arcy J.M. Cain <darcy@druid.net>

citext -
	A case-insensitive character string datatype
	by David E. Wheeler <david@kineticode.com>

cube -
	Multidimensional-cube datatype (GiST indexing example)
	by Gene Selkov, Jr. <selkovjr@mcs.anl.gov>

dblink -
	Allows remote query execution
	by Joe Conway <mail@joeconway.com>

dict_int -
	Text search dictionary template for integers
	by Sergey Karpov <karpov@sao.ru>

dict_xsyn -
	Text search dictionary template for extended synonym processing
	by Sergey Karpov <karpov@sao.ru>

earthdistance -
	Functions for computing distances between two points on Earth
        by Bruno Wolff III <bruno@wolff.to> and Hal Snyder <hal@vailsys.com>

fuzzystrmatch -
	Levenshtein, metaphone, and soundex fuzzy string matching
	by Joe Conway <mail@joeconway.com> and Joel Burton <jburton@scw.org>

hstore -
	Module for storing (key, value) pairs
	by Oleg Bartunov <oleg@sai.msu.su> and Teodor Sigaev <teodor@sigaev.ru>

intagg -
	Integer aggregator
	by mlw <markw@mohawksoft.com>

intarray -
	Index support for arrays of int4, using GiST
	by Teodor Sigaev <teodor@sigaev.ru> and Oleg Bartunov <oleg@sai.msu.su>

isn -
	PostgreSQL type extensions for ISBN, ISSN, ISMN, EAN13 product numbers
	by Germ<72>n M<>ndez Bravo (Kronuz) <kronuz@hotmail.com>

lo -
	Large Object maintenance
	by Peter Mount <peter@retep.org.uk> 

ltree -
	Tree-like data structures
	by Teodor Sigaev <teodor@sigaev.ru> and Oleg Bartunov <oleg@sai.msu.su>

oid2name - 
	Maps numeric files to table names
	by B Palmer <bpalmer@crimelabs.net>

pageinspect -
	Allows inspection of database pages
	Heikki Linnakangas <heikki@enterprisedb.com>

pg_buffercache -
	Real time queries on the shared buffer cache
	by Mark Kirkwood <markir@paradise.net.nz>

pg_freespacemap -
	Displays the contents of the free space map (FSM)
	by Mark Kirkwood <markir@paradise.net.nz>

pg_standby -
	Sample archive_command for warm standby operation
	by Simon Riggs <simon@2ndquadrant.com>

pg_stat_statements -
	Track statement execution times across a whole database cluster
	by Takahiro Itagaki <itagaki.takahiro@oss.ntt.co.jp>

pg_trgm -
	Functions for determining the similarity of text based on trigram
	matching.
	by Oleg Bartunov <oleg@sai.msu.su> and Teodor Sigaev <teodor@sigaev.ru>

pgbench -
	TPC-B like benchmarking tool
	by Tatsuo Ishii <ishii@sraoss.co.jp>

pgcrypto -
	Cryptographic functions
	by Marko Kreen <marko@l-t.ee>

pgrowlocks -
	A function to return row locking information
	by Tatsuo Ishii <ishii@sraoss.co.jp>

pgstattuple -
	Functions to return statistics about "dead" tuples and free
	space within a table
	by Tatsuo Ishii <ishii@sraoss.co.jp>

seg -
	Confidence-interval datatype (GiST indexing example)
	by Gene Selkov, Jr. <selkovjr@mcs.anl.gov>

spi -
	Various trigger functions, examples for using SPI.

sslinfo -
	Functions to get information about SSL certificates
	by Victor Wagner <vitus@cryptocom.ru>

start-scripts - 
	Scripts for starting the server at boot time on various platforms.

tablefunc -
	Examples of functions returning tables
	by Joe Conway <mail@joeconway.com>

test_parser -
	Sample text search parser
	by Sergey Karpov <karpov@sao.ru>

tsearch2 -
	Compatibility package for the pre-8.3 implementation of text search.
	Pavel Stehule <pavel.stehule@gmail.com>, based on code originally by
	Teodor Sigaev <teodor@sigaev.ru> and Oleg Bartunov <oleg@sai.msu.su>.

uuid-ossp -
	UUID generation functions
	by Peter Eisentraut <peter_e@gmx.net>

vacuumlo -
	Remove orphaned large objects
	by Peter T Mount <peter@retep.org.uk>

xml2 -
	Storing XML in PostgreSQL
	by John Gray <jgray@azuli.co.uk>