Extensions on PostgreSQL
2 likes2,445 views
This document discusses extensions in PostgreSQL. It outlines the extensibility of PostgreSQL through extensions to functions, data types, languages and more. It describes core extensions that are included, common third party extensions like PostGIS, and how to install extensions using CREATE EXTENSION. It also discusses the PostgreSQL Extension Network (PGXN) for sharing and installing extensions.
![Common Extensions
• PostGIS
• Pgmemchache - memcache_[get|add|set]()
• SkyTools
• OracleFCE - nvl(), reverse(), etc.
• pgSphere
• pgTAP - ok(val, expected)
• textsearch_senna
• json
• PL & FDW
©2011 FORCIA, Inc.](https://image.slidesharecdn.com/extensionsonpostgresqlup-110225175928-phpapp02/85/Extensions-on-PostgreSQL-6-320.jpg)
![PLs…
• PL/perl • PL/sh
• PL/python • PL/scheme
• PL/tcl • PL/proxy
• PL/ruby • PL/js
• PL/php • PL/v8js
• PL/java • PL/whitespace – coming soon!
• PL/R • PL/brainfuck
CREATE FUNCTION bf_add(int, int) RETURNS int AS
• PL/lua $$ >>>>[-<<<<+>>>>] $$
LANGUAGE brainfuck;
• PL/lolcode SELECT * FROM bf_add(3, 5); -- 8!
©2011 FORCIA, Inc.](https://image.slidesharecdn.com/extensionsonpostgresqlup-110225175928-phpapp02/85/Extensions-on-PostgreSQL-7-320.jpg)
![PGXN , a.k.a. “PostgreSQL Extension Network”
• By David E. Wheeler
• Inspired by CPAN
– [user@host] $ pgxn install hstore
• Under development…
©2011 FORCIA, Inc.](https://image.slidesharecdn.com/extensionsonpostgresqlup-110225175928-phpapp02/85/Extensions-on-PostgreSQL-10-320.jpg)
Extensions on PostgreSQL
- 1. Extensions on PostgreSQL Ever and Will Hitoshi Harada @ FORCIA, Inc. ©2011 FORCIA, Inc.
- 2. Extensions on PostgreSQL ©2011 FORCIA, Inc.
- 3. Outline • Extensibility of PostgreSQL • Core extensions • Common extensions • CREATE EXTENSION • PGXN, a.k.a. “PostgreSQL Extension Network” ©2011 FORCIA, Inc.
- 4. Extensibility of PostgreSQL dblink, adminpack, pgcrypto, ... Parser cube, ltree, citext, hstore, json, … Functions Data Types PL pl/R, pl/v8js, pl/Ruby, pl/Lua, … Optimizer pgadviser Executor Table auto_explain Index GiST/GIN, textsearch_senna, textsearch_groonga SQL/MED (9.1!) c.f. external tools: pgpool, slony, pg_bulkload… ©2011 FORCIA, Inc.
- 5. Core Extensions • intagg - int_array_aggregate() • intarray - sort(), uniq() • hstore - ‘a=>1, b=>2’->’a’ • citext - case insensitive text • cube - (1.5, 2.0, 0.5) • pgcrypto - digest() -- md5, sha1 • dblink - dblink_exec(connstr, sql) • earthdistance - earth() • …and more ©2011 FORCIA, Inc.
- 6. Common Extensions • PostGIS • Pgmemchache - memcache_[get|add|set]() • SkyTools • OracleFCE - nvl(), reverse(), etc. • pgSphere • pgTAP - ok(val, expected) • textsearch_senna • json • PL & FDW ©2011 FORCIA, Inc.
- 7. PLs… • PL/perl • PL/sh • PL/python • PL/scheme • PL/tcl • PL/proxy • PL/ruby • PL/js • PL/php • PL/v8js • PL/java • PL/whitespace – coming soon! • PL/R • PL/brainfuck CREATE FUNCTION bf_add(int, int) RETURNS int AS • PL/lua $$ >>>>[-<<<<+>>>>] $$ LANGUAGE brainfuck; • PL/lolcode SELECT * FROM bf_add(3, 5); -- 8! ©2011 FORCIA, Inc.
- 8. FDWs (Foreign Data Wrapper) • file_fdw • postgresql_fdw • twitter_fdw SELECT from_user, substr(text, 1, 20), age(current_timestamp, created_at) FROM twitter_search WHERE q =‘#iphone’; from_user | substr | age -----------------+----------------------+---------------- anndreilla | Grab @Scrambleface l | 09:02:19.76668 tebow904 | @sinner_saved_ u ret | 09:02:30.76668 iphomania_de | Cydia-Tweak: Pull to | 09:02:31.76668 developerworks | The #Social #Network | 09:02:34.76668 appstorewire | AppAdvice: Project: | 09:02:42.76668 appstorewire | AppAdvice: Project: | 09:02:42.76668 appstorewire | AppAdvice: A Chance | 09:02:42.76668 appstorewire | AppAdvice: A Chance | 09:02:42.76668 appstorewire | AppAdvice: Infinity | 09:02:43.76668 appstorewire | AppAdvice: Infinity | 09:02:43.76668 ChrisCompo | RT @thedroidguy: #iP | 09:02:46.76668 DhilipSiva_Aple | #ipad #mac #iphone i | 09:02:48.76668 brandnewapps | New iPmart app: iNet | 09:02:48.76668 brandnewapps | New iPmart app: A Ne | 09:02:49.76668 muenchner_kindl | Hard Rock Mobile | 09:02:59.76668 (15 rows) ©2011 FORCIA, Inc.
- 9. CREATE EXTENSION • Proposed for 9.1 Committed for 9.1 $ psql –d dbname –f /path/to/contrib/hstore.sql db=# CREATE EXTENSION hstore; CREATE EXTENSION db1=# SELECT 'a=>1, b=>2'::hstore; hstore -------------------- "a"=>"1", "b"=>"2" (1 row) db1=# DROP EXTENSION hstore; DROP EXTENSION • EASY pg_dump/pg_restore, and DROP. Yay! ©2011 FORCIA, Inc.
- 10. PGXN , a.k.a. “PostgreSQL Extension Network” • By David E. Wheeler • Inspired by CPAN – [user@host] $ pgxn install hstore • Under development… ©2011 FORCIA, Inc.
- 11. Try to make YOUR extensions! CREATE OR REPLACE FUNCTION is_timezone( tz CITEXT ) RETURNS BOOLEAN LANGUAGE plpgsql STABLE AS $$ BEGIN PERFORM NOW() AT TIME ZONE tz; RETURN TRUE; EXCEPTION WHEN invalid_parameter_value THEN RETURN FALSE; END; $$; CREATE DOMAIN timezone AS CITEXT CHECK ( is_timezone( VALUE ) ); http://blog.pgxn.org/post/1673708474/slides-manager-work ©2011 FORCIA, Inc.
- 12. Conclusion • You can use rich extensions already. • You can make and upload your extension. • PostgreSQL is an application platform. ©2011 FORCIA, Inc.