mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-12-09 08:10:09 +08:00
fa5e44017a
can tell whether it is being used as an aggregate or not. This allows such a function to avoid re-pallocing a pass-by-reference transition value; normally it would be unsafe for a function to scribble on an input, but in the aggregate case it's safe to reuse the old transition value. Make int8inc() do this. This gets a useful improvement in the speed of COUNT(*), at least on narrow tables (it seems to be swamped by I/O when the table rows are wide). Per a discussion in early December with Neil Conway. I also fixed int_aggregate.c to check this, thereby turning it into something approaching a supportable technique instead of being a crude hack. |
||
|---|---|---|
| .. | ||
| adddepend | ||
| array | ||
| btree_gist | ||
| chkpass | ||
| cube | ||
| dbase | ||
| dblink | ||
| dbmirror | ||
| dbsize | ||
| earthdistance | ||
| findoidjoins | ||
| fulltextindex | ||
| fuzzystrmatch | ||
| intagg | ||
| intarray | ||
| ipc_check | ||
| isbn_issn | ||
| lo | ||
| ltree | ||
| mac | ||
| miscutil | ||
| mSQL-interface | ||
| mysql | ||
| noupdate | ||
| oid2name | ||
| oracle | ||
| pg_autovacuum | ||
| pg_buffercache | ||
| pg_dumplo | ||
| pg_trgm | ||
| pg_upgrade | ||
| pgbench | ||
| pgcrypto | ||
| pgstattuple | ||
| reindexdb | ||
| rtree_gist | ||
| seg | ||
| spi | ||
| start-scripts | ||
| string | ||
| tablefunc | ||
| tips | ||
| tools | ||
| tsearch | ||
| tsearch2 | ||
| userlock | ||
| vacuumlo | ||
| xml | ||
| xml2 | ||
| contrib-global.mk | ||
| Makefile | ||
| 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. Each subdirectory contains a README file with information about the module. 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: ------ adddepend - Add object dependency information to pre-7.3 objects. by Rod Taylor <rbt@rbt.ca> array - Array iterator functions (now obsolete due to backend improvements) by Massimo Dal Zotto <dz@cs.unitn.it> 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> cube - Multidimensional-cube datatype (GiST indexing example) by Gene Selkov, Jr. <selkovjr@mcs.anl.gov> dbase - Converts from dbase/xbase to PostgreSQL by Maarten.Boekhold <Maarten.Boekhold@reuters.com>, Frank Koormann <fkoorman@usf.uni-osnabrueck.de>, Ivan Baldo <lubaldo@adinet.com.uy> dblink - Allows remote query execution by Joe Conway <mail@joeconway.com> dbmirror - Replication server by Steven Singer <ssinger@navtechinc.com> dbsize - Reports database and table disk space by Peter Eisentraut <peter_e@gmx.net> earthdistance - Operator for computing earth distance for two points by Hal Snyder <hal@vailsys.com> findoidjoins - Finds the joins used by oid columns by examining the actual values in the oid columns and row oids. by Bruce Momjian <pgman@candle.pha.pa.us> fulltextindex - Full text indexing using triggers by Maarten Boekhold <maartenb@dutepp0.et.tudelft.nl> fuzzystrmatch - Levenshtein, metaphone, and soundex fuzzy string matching by Joe Conway <mail@joeconway.com>, Joel Burton <jburton@scw.org> 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> ipc_check - Simple test script to help in configuring IPC. FreeBSD only, for now. isbn_issn - PostgreSQL type extensions for ISBN (books) and ISSN (serials) by Garrett A. Wollman <wollman@khavrinen.lcs.mit.edu> 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> mSQL-interface - mSQL API translation library by Aldrin Leal <aldrin@americasnet.com> mac - Support functions for MAC address types by Lawrence E. Rosenman <ler@lerctr.org> miscutil - PostgreSQL assert checking and various utility functions by Massimo Dal Zotto <dz@cs.unitn.it> mysql - Utility to convert MySQL schema dumps to SQL92 and PostgreSQL by Thomas Lockhart <lockhart@alumni.caltech.edu> Max Rudensky <fonin@ziet.zhitomir.ua> Valentine Danilchuk <valdan@ziet.zhitomir.ua> noupdate - Trigger to prevent updates on single columns oid2name - Maps numeric files to table names by B Palmer <bpalmer@crimelabs.net> oracle - Converts Oracle database schema to PostgreSQL by Gilles Darold <gilles@darold.net> pg_autovacuum - Automatically performs vacuum by Matthew T. O'Connor <matthew@zeut.net> pg_buffercache - Real time queries on the shared buffer cache by Mark Kirkwood <markir@paradise.net.nz> pg_dumplo - Dump large objects by Karel Zak <zakkr@zf.jcu.cz> 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> pg_upgrade - Upgrade from previous PostgreSQL version without pg_dump/reload by Bruce Momjian <pgman@candle.pha.pa.us> pgbench - TPC-B like benchmarking tool by Tatsuo Ishii <t-ishii@sra.co.jp> pgcrypto - Cryptographic functions by Marko Kreen <marko@l-t.ee> pgstattuple - A function to return statistics about "dead" tuples and free space within a table by Tatsuo Ishii <t-ishii@sra.co.jp> reindexdb - Reindexes a database by Shaun Thomas <sthomas@townnews.com> rtree_gist - Support for emulating RTREE indexing in GiST by Oleg Bartunov <oleg@sai.msu.su> and Teodor Sigaev <teodor@sigaev.ru> seg - Confidence-interval datatype (GiST indexing example) by Gene Selkov, Jr. <selkovjr@mcs.anl.gov> spi - Various trigger functions, examples for using SPI. start-scripts - Scripts for starting the server at boot time. string - C-like input/output conversion routines for strings by Massimo Dal Zotto <dz@cs.unitn.it> tablefunc - Examples of functions returning tables by Joe Conway <mail@joeconway.com> tips/apache_logging - Getting Apache to log to PostgreSQL by Terry Mackintosh <terry@terrym.com> tools - Assorted developer tools by Massimo Dal Zotto <dz@cs.unitn.it> tsearch - Full-text-index support using GiST (obsolete version) by Teodor Sigaev <teodor@sigaev.ru> and Oleg Bartunov <oleg@sai.msu.su>. tsearch2 - Full-text-index support using GiST by Teodor Sigaev <teodor@sigaev.ru> and Oleg Bartunov <oleg@sai.msu.su>. userlock - User locks by Massimo Dal Zotto <dz@cs.unitn.it> vacuumlo - Remove orphaned large objects by Peter T Mount <peter@retep.org.uk> xml - Storing XML in PostgreSQL (obsolete version) by John Gray <jgray@azuli.co.uk> xml2 - Storing XML in PostgreSQL by John Gray <jgray@azuli.co.uk>