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.

When building from the source distribution, these modules are not
built automatically, unless you build the "world" target.  You can
also build and install them all by running "make all" and "make
install" in this directory; or to build and install just one selected
module, do the same in that module's subdirectory.

Some directories supply new user-defined functions, operators, or
types.  To make use of one of these modules, after you have installed
the code you need to register the new SQL objects in the database
system by executing a CREATE EXTENSION command.  In a fresh database,
you can simply do

    CREATE EXTENSION module_name;

See the PostgreSQL documentation for more information about this
procedure.

Index:
------

adminpack -
	File and log manipulation routines, used by pgAdmin
	by Dave Page <[email protected]>

auth_delay
	Add a short delay after a failed authentication attempt, to make
	brute-force attacks on database passwords a bit harder.
	by KaiGai Kohei <[email protected]>

auto_explain -
	Log EXPLAIN output for long-running queries
	by Takahiro Itagaki <[email protected]>

btree_gin -
	Support for emulating BTREE indexing in GIN
	by Oleg Bartunov <[email protected]> and Teodor Sigaev <[email protected]>

btree_gist -
	Support for emulating BTREE indexing in GiST
	by Oleg Bartunov <[email protected]> and Teodor Sigaev <[email protected]>

chkpass -
	An auto-encrypted password datatype
	by D'Arcy J.M. Cain <[email protected]>

citext -
	A case-insensitive character string datatype
	by David E. Wheeler <[email protected]>

cube -
	Multidimensional-cube datatype (GiST indexing example)
	by Gene Selkov, Jr. <[email protected]>

dblink -
	Allows remote query execution
	by Joe Conway <[email protected]>

dict_int -
	Text search dictionary template for integers
	by Sergey Karpov <[email protected]>

dict_xsyn -
	Text search dictionary template for extended synonym processing
	by Sergey Karpov <[email protected]>

earthdistance -
	Functions for computing distances between two points on Earth
	by Bruno Wolff III <[email protected]> and Hal Snyder <[email protected]>

file_fdw
	Foreign-data wrapper for server-side CSV/TEXT files
	by Shigeru Hanada <[email protected]>

fuzzystrmatch -
	Levenshtein, metaphone, and soundex fuzzy string matching
	by Joe Conway <[email protected]> and Joel Burton <[email protected]>

hstore -
	Module for storing (key, value) pairs
	by Oleg Bartunov <[email protected]> and Teodor Sigaev <[email protected]>

intagg -
	Integer aggregator
	by mlw <[email protected]>

intarray -
	Index support for arrays of int4, using GiST
	by Teodor Sigaev <[email protected]> and Oleg Bartunov <[email protected]>

interconnect -
	Module for interconnect
	Split from src/backend/cdb/motion/ as a independency module

isn -
	PostgreSQL type extensions for ISBN, ISSN, ISMN, EAN13 product numbers
	by Germán Méndez Bravo (Kronuz) <[email protected]>

lo -
	Large Object maintenance
	by Peter Mount <[email protected]>

ltree -
	Tree-like data structures
	by Teodor Sigaev <[email protected]> and Oleg Bartunov <[email protected]>

oid2name -
	Maps numeric files to table names
	by B Palmer <[email protected]>

pageinspect -
	Allows inspection of database pages
	Heikki Linnakangas <[email protected]>

passwordcheck
    Simple password strength checker
    Laurenz Albe <[email protected]>

pg_buffercache -
	Real time queries on the shared buffer cache
	by Mark Kirkwood <[email protected]>

pg_freespacemap -
	Displays the contents of the free space map (FSM)
	by Mark Kirkwood <[email protected]>

pg_standby -
	Sample archive_command for warm standby operation
	by Simon Riggs <[email protected]>

pg_stat_statements -
	Track statement execution times across a whole database cluster
	by Takahiro Itagaki <[email protected]>

pg_test_fsync -
	Test different wal_sync_method settings
	by Bruce Momjian <[email protected]>

pg_trgm -
	Functions for determining the similarity of text based on trigram
	matching.
	by Oleg Bartunov <[email protected]> and Teodor Sigaev <[email protected]>

pgbench -
	TPC-B like benchmarking tool
	by Tatsuo Ishii <[email protected]>

pgcrypto -
	Cryptographic functions
	by Marko Kreen <[email protected]>

pgrowlocks -
	A function to return row locking information
	by Tatsuo Ishii <[email protected]>

pgstattuple -
	Functions to return statistics about "dead" tuples and free
	space within a table
	by Tatsuo Ishii <[email protected]>

seg -
	Confidence-interval datatype (GiST indexing example)
	by Gene Selkov, Jr. <[email protected]>

sepgsql -
	External security provider using SELinux
	by KaiGai Kohei <[email protected]>

spi -
	Various trigger functions, examples for using SPI.

sslinfo -
	Functions to get information about SSL certificates
	by Victor Wagner <[email protected]>

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

tablefunc -
	Examples of functions returning tables
	by Joe Conway <[email protected]>

test_parser -
	Sample text search parser
	by Sergey Karpov <[email protected]>

tsearch2 -
	Compatibility package for the pre-8.3 implementation of text search.
	Pavel Stehule <[email protected]>, based on code originally by
	Teodor Sigaev <[email protected]> and Oleg Bartunov <[email protected]>.

unaccent -
	Unaccent dictionary for text search
	Teodor Sigaev <[email protected]> and Oleg Bartunov <[email protected]>.

uuid-ossp -
	UUID generation functions
	by Peter Eisentraut <[email protected]>

vacuumlo -
	Remove orphaned large objects
	by Peter T Mount <[email protected]>

xml2 -
	Storing XML in PostgreSQL
	by John Gray <[email protected]>