377 lines
17 KiB
Plaintext
377 lines
17 KiB
Plaintext
TODO list for PostgreSQL
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========================
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Last updated: Sun Feb 1 15:08:57 EST 1998
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Current maintainer: Bruce Momjian (maillist@candle.pha.pa.us)
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The most recent version of this document can be viewed at
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the PostgreSQL WWW site, http://www.postgreSQL.org.
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THE CHANGES FOR 6.3 APPEAR AT THE END OF THIS DOCUMENT
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A dash(-) marks changes to be in the next release.
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Developers who have claimed items are:
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-------------------------------------
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* Bruce is Bruce Momjian<maillist@candle.pha.pa.us>
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* Bryan is Bryan Henderson<bryanh@giraffe.netgate.net>
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* D'Arcy is D'Arcy J.M. Cain <darcy@druid.net>
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* Dan is Dan McGuirk <mcguirk@indirect.com>
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* Daniel is Daniel Kalchev <daniel@digsys.bg>
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* Darren is Darren King <darrenk@insightdist.com>
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* Edmund is Edmund Mergl <E.Mergl@bawue.de>
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* Erich Stamberger <eberger@gewi.kfunigraz.ac.at>
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* Gerhard is Gerhard Reithofer <gerhardr@tech-edv.co.at>
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* Goran is Goran Thyni <goran@bildbasen.se>
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* Henry is Henry B. Hotz <hotz@jpl.nasa.gov>
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* Igor is Igor <igor@sba.miami.edu>
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* Jan is Jan Wieck <wieck@sapserv.debis.de>
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* Jun is Jun Kuwamura <juk@rccm.co.jp>
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* Kurt is "Kurt J. Lidl" <lidl@va.pubnix.com>
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* Marc is Marc Fournier <scrappy@hub.org>
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* Martin is Martin S. Utesch <utesch@aut.tu-freiberg.de>
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* Oleg is Oleg Bartunov <oleg@sai.msu.su>
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* Paul is Paul M. Aoki <aoki@CS.Berkeley.EDU>
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* Patrick is Patrick van Kleef <pvk@pobox.com>
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* Peter is Peter T Mount <psqlhack@maidast.demon.co.uk>
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* Phil is Phil Thompson <phil@river-bank.demon.co.uk>
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* Raymond is Raymond Toy <toy@rtp.ericsson.se>
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* Soo-Ho Ok <shok@detc.dongeui-tc.ac.kr>
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* Stefan Simkovics <ssimkovi@rainbow.studorg.tuwien.ac.at>
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* Sven is Sven Verdoolaege <skimo@breughel.ufsia.ac.be>
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* Tatsuo is Tatsuo Ishii <t-ishii@sra.co.jp>
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* Thomas is Thomas Lockhart <tgl@mythos.jpl.nasa.gov>
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* Todd is Todd Brandys is <brandys@eng3.hep.uiuc.edu>
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* Vadim is "Vadim B. Mikheev" <vadim@sable.krasnoyarsk.su>
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* Vivek is Vivek Khera <khera@kci.kciLink.com>
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Additional; 6.3 developers include:
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---------------------------------
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* Billy is Billy G. Allie <Bill.Allie@mug.org>
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* Brook is Brook Milligan
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* James is James Hughes <jamesh@interpath.com>
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* Jeroen is Jeroen van Vianen <jeroenv@design.nl>
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* Matt is Matt Maycock <maycock@intelliquest.com>
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* Ryan is Ryan Kirkpatrick <rkirkpat@nag.cs.colorado.edu>
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* TomH is Tom I Helbekkmo <tih@Hamartun.Priv.NO>
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* TomS is Tom Szybist
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* Travis is Travis Melhiser <melhiser@viper.co.union.nc.us>
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RELIABILITY
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-----------
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* Overhaul mdmgr/smgr to fix double unlinking and double opens, cleanup
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* Overhaul bufmgr/lockmgr/transaction manager
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* -Fix CLUSTER
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* Remove EXTEND?
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* -Aggregates on VIEW always returns zero (maybe because there is no oid for views?)
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* CREATE VIEW requires super-user priviledge
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* Can lo_export()/lo_import() read/write anywhere, causing a security problem?
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* Tables that start with xinv confused to be large objects
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* Two and three dimmensional arrays display improperly, missing {}
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* -Add GROUP BY to INSERT INTO table SELECT * FROM table2
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* lo_unlink() crashes server
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* Prevent auto-table reference, like SELECT table.col WHERE col = 3 (?)
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* -Remove un-needed malloc() calls and replace with palloc().
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* SELECT * FROM table WHERE int4_column = '1' fails
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* SELECT a[1] FROM test fails, it needs test.a[1]
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* -SELECT COUNT(*) FROM TAB1, TAB2 fails
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* -SELECT SUM(2+2) FROM table dumps core
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* UPDATE table SET table.value = 3 fails
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* -UPDATE key_table SET keyval=count(reftab.num) fails
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* -INSERT INTO ... SELECT DISTINCT ... does not accept DISTINCT
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* -INSERT INTO table SELECT id, count(*) FROM table2 GROUP BY id generates error
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* Make pg_dump preserve inheritance column order, do non-inherits first
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* User who can create databases can modify pg_database table
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ENHANCEMENTS
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------------
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* Replace table-level locking with row or page-level locking(Vadim)
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* -PRIMARY KEY during table creation(Thomas)
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* Add SERIAL type
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* -Preserve GRANT/REVOKE/pg_group in pg_dump
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* Transaction log, so re-do log can be on a separate disk
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* Allow transaction commits with rollback with no-fsync performance
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* More access control over who can create tables and access the database
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* Add full ANSI SQL capabilities
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* -add subselects(Vadim)
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* Implement HAVING clause
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* -Implement EXISTS qualifier
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* -report "Not implemented" if valid syntax is supplied
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* add OUTER joins, left and right (Thomas)
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* make VIEWs updateable where possible
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* -add UNIONS(Bruce)
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* add INTERSECTS, SUBTRACTS
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* add temporary tables(Bruce)
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* add sql3 recursive unions
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* add the concept of dataspaces
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* add DECIMAL, NUMERIC, DOUBLE PRECISION, BIT, BIT VARYING
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* NCHAR (as distinguished from ordinary varchar),
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* Allow compression of large fields or a compressed field type
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* Fix the rules system(Jan?,Soo-Ho)
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* robust
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* making INSTEAD rules work
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* add CONSTRAINT
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* Full set of text operations and functions
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* word searches, concat,max() on text, char
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* Large objects
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* -overwriting blocks has problems(Peter)
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* -there are other problems, too.(Peter)
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* Fix large object mapping scheme, own reltype
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* not to stuff everything as files in a single directory
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* Better interface for adding to pg_group
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* Make MONEY/DECIMAL have a defined precision
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* Add support for tables >2G, or test current version
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* Threaded version of the server or libpq
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* Allow libpq to cancel query requests
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* Add REGEX internationalization
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* -Add other language types for built-in functions
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* expand to allow tcl, perl, java
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* generalize the function manager switch to pass
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* function sources to interpreter engines.
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* -remove time-travel feature(Vadim)
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* -reduce system column overhead(Vadmin)
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* -remove pg_time table(Vadim)
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* allow row re-use without vacuum, maybe?(Vadim)
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* Remove restriction that ORDER BY field must be in SELECT list
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* Add word index for text fields, maybe with trigrams, i.e.:
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* ' (cat | dog) & ! fox ' meaning text has cat or dog, but not fox
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* Populate backend status area and write program to dump status data
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* Add ALTER TABLE DROP COLUMN feature
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* Allow INSERT INTO ... SELECT to convert column types
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* Add syslog functionality(Marc)
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* Add STDDEV/VARIANCE() function for standard deviation computation/variance
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* -Add table/column/function discription table indexed by oid
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* -add pg_type attribute to identify types that need length (bpchar, varchar)
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* add UNIQUE capability to non-btree indexes
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* make number of backends a config parameter, storage/sinvaladt.h:MaxBackendId
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* certain indexes will not shrink, i.e. oid indexes with many inserts
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* make NULL's come out at the beginning or end depending on the ORDER BY direction
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* change the library/backend interface to use network byte order
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* -allow unix domain sockets for local connections for performance and security
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* -Add PAGER for psql's \dt, \d, \z tablename
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* -Make timezone set-able by client applications(Thomas)
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* Restore unused oid's on backend exit if no one else has gotten oids
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* remove non-standard types from the system, and make them loadable
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* -make reads queue behind a write waiting for a lock(Bruce)
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* -add LOCK statement(Bruce)
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* -add report of offending line when COPY command fails
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* have UPDATE/DELETE clean out indexes
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* -allow varchar() to only store used bytes, not maximum
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* allow WHERE restriction on ctid
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* allow pg_descriptions when creating types, tables, columns, and functions
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* Fix compile and security of Kerberos/GSSAPI code
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* Allow psql to print nulls as distinct from ""(?)
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* Allow variable casts with BETWEEN 'today'::asbtime AND 'today'::abstime
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* Allow VIEW permissions to be set separately from the underlying tables
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* Allow text, char(), and varchar() overhead to be only 2 bytes, not 4 bytes
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PERFORMANCE
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-----------
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* Use indexes in ORDER BY, min(), max()
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* -Allow LIKE/wildcard matches to use indexes if the wildcard character is not first
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* Optimizing disjunctive queries
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* Fix bushy-plans (Martin)
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* Other optimizer bugs
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* Prevent fsync in SELECT-only queries
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* Cache most recent query plan(s?)
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* Shared catalog cache, reduce lseek()'s by caching table size in shared area
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* Allow compression of log and meta data
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* Add FILLFACTOR to index creation
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* Allow indexes to be used with OR clauses(Vadim)
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* update pg_statistic table to remove operator column
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* make index creation use psort code, because it is now faster(Vadim)
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* remove fork()/exec() of backend and make it just fork()
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DOCUMENTATION
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-------------
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* Update usermanual source(many)
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* added features used in grammer but not in docs, like :: and CAST
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* update libpq++ and pginterface manual page
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* Add keyword list to documentation, already in /tools
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=============================================================================
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CHANGES IN THE 6.3 RELEASE
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--------------------------
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Developers who have claimed items are:
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-------------------------------------
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* Billy is Billy G. Allie <Bill.Allie@mug.org>
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* Brook is Brook Milligan
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* Bruce is Bruce Momjian <maillist@candle.pha.pa.us>
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* D'Arcy is D'Arcy J.M. Cain <darcy@druid.net>
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* Dan is Dan McGuirk <mcguirk@indirect.com>
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* Darren is Darren King <darrenk@insightdist.com>
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* Goran is Goran Thyni <goran@bildbasen.se>
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* Henry is Henry B. Hotz <hotz@jpl.nasa.gov>
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* James is James Hughes <jamesh@interpath.com>
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* Jan is Jan Wieck <wieck@sapserv.debis.de>
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* Jeroen is Jeroen van Vianen <jeroenv@design.nl>
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* Marc is Marc Fournier <scrappy@hub.org>
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* Martin is Martin S. Utesch <utesch@aut.tu-freiberg.de>
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* Matt is Matt Maycock <maycock@intelliquest.com>
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* Peter is Peter T Mount <psqlhack@maidast.demon.co.uk>
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* Phil is Phil Thompson <phil@river-bank.demon.co.uk>
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* Ryan is Ryan Kirkpatrick <rkirkpat@nag.cs.colorado.edu>
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* Tatsuo is Tatsuo Ishii <t-ishii@sra.co.jp>
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* Thomas is Thomas Lockhart <lockhart@alumni.caltech.edu>
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* TomH is Tom I Helbekkmo <tih@Hamartun.Priv.NO>
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* TomS is Tom Szybist
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* Todd is Todd Brandys is <brandys@eng3.hep.uiuc.edu>
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* Travis is Travis Melhiser <melhiser@viper.co.union.nc.us>
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* Vadim is "Vadim B. Mikheev" <vadim@sable.krasnoyarsk.su>
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Bug Fixes
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---------
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Fix binary cursors broken by MOVE implementation(Vadim)
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Fix for tcl library crash(Jan)
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Fix for array handling, from Gerhard Hintermayer
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Fix acl error, and remove duplicate pqtrace(Bruce)
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Fix psql \e for empty file(Bruce)
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Fix for textcat on varchar() fields(Bruce)
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Fix for DBT Sendproc (Zeugswetter Andres)
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Fix vacuum analyze syntax problem(Bruce)
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Fix for international identifiers(Tatsuo)
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Fix aggregates on inherited tables(Bruce)
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Fix substr() for out-of-bounds data
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Fix for select 1=1 or 2=2, select 1=1 and 2=2, and select sum(2+2)(Bruce)
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Fix notty output to show status result. -q option still turns it off(Bruce)
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Fix for count(*), aggs with views and multiple tables and sum(3)(Bruce)
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Fix cluster(Bruce)
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Fix for PQtrace start/stop several times(Bruce)
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Fix a variety of locking problems like newer lock waiters getting
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lock before older waiters, and having readlock people not share
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locks if a writer is waiting for a lock, and waiting writers not
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getting priority over waiting readers(Bruce)
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Fix crashes in psql when executing queries from external files(James)
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Fix problem with multiple order by columns, with the first one having
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NULL values(Jeroen)
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Use correct hash table support functions for float8 and int4(Thomas)
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Re-enable JOIN= option in CREATE OPERATOR statement (Thomas)
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Change precedence for boolean operators to match expected behavior(Thomas)
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Generate elog(ERROR) on over-large integer(Bruce)
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Allow multiple-argument functions in constraint clauses(Thomas)
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Check boolean input literals for 'true','false','yes','no','1','0'
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and throw elog(ERROR) if unrecognized(Thomas)
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Enhancements
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------------
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Real deadlock detection, no more timeouts(Bruce)
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<NOT DONE YET> Subselects with EXISTS, IN, ALL, ANY keywords (Vadim, Bruce, Thomas)
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Add SQL92 "constants" CURRENT_DATE, CURRENT_TIME, CURRENT_TIMESTAMP,
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CURRENT_USER(Thomas)
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Speedup by inlining some frequently-called functions
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Modify constraint syntax to be SQL92-compliant(Thomas)
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Implement SQL92 PRIMARY KEY and UNIQUE clauses using indices(Thomas)
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Recognize SQL92 syntax for FOREIGN KEY. Throw elog notice(Thomas)
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Allow NOT NULL UNIQUE constraint clause (each allowed separately before)(Thomas)
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Allow Postgres-style casting ("::") of non-constants(Thomas)
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Add support for SQL3 TRUE and FALSE boolean constants(Thomas)
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Support SQL92 syntax for IS TRUE/IS FALSE/IS NOT TRUE/IS NOT FALSE(Thomas)
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Allow shorter strings for boolean literals (e.g. "t", "tr", "tru")(Thomas)
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Allow SQL92 delimited identifiers(Thomas)
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Implement SQL92 binary and hexadecimal string decoding (b'10' and x'1F')(Thomas)
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Support SQL92 syntax for type coercion of literal strings
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(e.g. "DATETIME 'now'")(Thomas)
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Add conversions for int2, int4, and OID types to and from text(Thomas)
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Use shared lock when building indices(Vadim)
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Free memory allocated for an user query inside transaction block after
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this query is done, was turned off in <= 6.2.1(Vadim)
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New SQL statement CREATE PROCEDURAL LANGUAGE(Jan)
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New PostgreSQL Procedural Language (PL) backend interface(Jan)
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Rename pg_dump -H option to -h(Bruce)
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Add Java support for passwords, European dates(Peter)
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Use indices for LIKE and ~, !~ operations(Bruce)
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Add hash functions for datetime and timespan(Thomas)
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Time Travel removed(Vadim, Bruce)
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Add paging for \d and \z, and fix \i(Bruce)
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Add Unix domain socket support to backend and to frontend library(Goran)
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Implement CREATE DATABASE/WITH LOCATION and initlocation utility(Thomas)
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Allow more SQL92 and/or Postgres reserved words as column identifiers(Thomas)
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Augment support for SQL92 SET TIME ZONE...(Thomas)
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SET/SHOW/RESET TIME ZONE uses TZ backend environment variable(Thomas)
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Implement SET keyword = DEFAULT and SET TIME ZONE DEFAULT(Thomas)
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Enable SET TIME ZONE using TZ environment variable(Thomas)
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Add PGDATESTYLE environment variable to frontend and backend initialization(Thomas)
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Add PGTZ, PGCOSTHEAP, PGCOSTINDEX, PGRPLANS, PGGEQO
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frontend library initialization environment variables(Thomas)
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Regression tests time zone automatically set with "setenv PGTZ PST8PDT"(Thomas)
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Add pg_description table for info on tables, columns, operators, types, and
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aggregates(Bruce)
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Increase 16 char limit on system table/index names to 32 characters(Bruce)
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Rename system indices(Bruce)
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Add 'GERMAN' option to SET DATESTYLE(Thomas)
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Define an "ISO-style" timespan output format with "hh:mm:ss" fields(Thomas)
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Allow fractional values for delta times (e.g. '2.5 days')(Thomas)
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Validate numeric input more carefully for delta times(Thomas)
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Implement day of year as possible input to date_part()(Thomas)
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Define timespan_finite() and text_timespan() functions(Thomas)
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Remove archive stuff(Bruce)
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Allow for a pg_password authentication database that is separate from
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the system password file(Todd)
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Dump ACLs, GRANT, REVOKE permissions(Matt)
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Define text, varchar, and bpchar string length functions(Thomas)
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Fix Query handling for inheritance, and cost computations(Bruce)
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Implement CREATE TABLE/AS SELECT (alternative to SELECT/INTO)(Thomas)
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Allow NOT, IS NULL, IS NOT NULL in constraints(Thomas)
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Implement UNIONs for SELECT(Bruce)
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Add UNION, GROUP, DISTINCT to INSERT(Bruce)
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varchar() stores only necessary bytes on disk(Bruce)
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Fix for BLOBs(Peter)
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Mega-Patch for JDBC...see README_6.3 for list of changes(Peter)
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Allow installation data block size and max tuple size configuration(Darren)
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Remove unused "option" from PQconnectdb()
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New LOCK command and lock manual page describing deadlocks(Bruce)
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Add new psql \da, \dd, \df, \do, \dS, and \dT commands(Bruce)
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Enhance psql \z to show sequences(Bruce)
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Show NOT NULL and DEFAULT in psql \d table(Bruce)
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New psql .psqlrc file startup(Andrew)
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Modify sample startup script in contrib/linux to show syslog(Thomas)
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New types for IP and MAC addresses in contrib/ip_and_mac(TomH)
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Unix system time conversions with date/time types in contrib/unixdate(Thomas)
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Update of contrib stuff(Massimo)
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Add Unix socket support to DBD::Pg(Goran)
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New python interface (PyGreSQL 2.0)(D'Arcy)
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New frontend/backend protocol has a version number, network byte order(Phil)
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Security features in pg_hba.conf enhanced and documented, many cleanups(Phil)
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New HTML and Postscript documentation(Thomas)
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Source Tree Changes
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-------------------
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Add new html development tools, and flow chart in /tools/backend
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Fix for SCO compiles
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Stratus computer port "Gillies, Robert" <GilliesR@Nichols.com>
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Added support for shlib for BSD44_derived & i386_solaris
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Make configure more automated(Brook)
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Add script to check regression test results
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Break parser functions into smaller files, group together(Bruce)
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Rename heap_create to heap_create_and_catalog, rename heap_creatr
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to heap_create()(Bruce)
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Sparc/Linux patch for locking(TomS)
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Remove PORTNAME and reorganize port-specific stuff(Marc)
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Add optimizer README file(Bruce)
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Remove some recursion in optimizer and clean up some code there(Bruce)
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Fix for NetBSD locking(Henry)
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Fix for libptcl make(Tatsuo)
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AIX patch(Darren)
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Change IS TRUE, IS FALSE, ... to expressions using "=" rather than
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function calls to istrue() or isfalse() to allow optimization(Thomas)
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Various fixes NetBSD/Sparc related(TomH)
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Alpha linux locking(Travis,Ryan)
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Change elog(WARN) to elog(ERROR)(Bruce)
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FAQ for FreeBSD(Marc)
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Bring in the PostODBC source tree as part of our standard distribution(Marc)
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A minor patch for HP/UX 10 vs 9(Stan)
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New pg_attribute.atttypmod for type-specific info like varchar length(Bruce)
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Unixware patches(Billy)
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New i386 'lock' for spin lock asm(Billy)
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Support for multiplexed backends is removed
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Start an OpenBSD port
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Start an AUX port
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Start a Cygnus port
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Add string functions to regression suite(Thomas)
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Expand a few function names formerly truncated to 16 characters(Thomas)
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