296 lines
13 KiB
Plaintext
296 lines
13 KiB
Plaintext
TODO list for PostgreSQL
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========================
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Last updated: Fri Oct 17 08:18:16 EDT 1997
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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 6.2 AND 6.2.1 APPEAR AT THE END OF THIS DOCUMENT
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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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* 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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* Igor is Igor <igor@sba.miami.edu>
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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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* 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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* 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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* 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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RELIABILITY
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-----------
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* -Overhaul mdmgr/smgr to fix double unlinking and double opens, cleanup(Erich)
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* -Overhaul bufmgr/lockmgr/transaction manager(Vadim)
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* Fix CLUSTER
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* Remove EXTEND?
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* Fix all NULL features, allow psql to print nulls meaningfully
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* Fix compile and security of Kerberos/GSSAPI code (Daniel Kalchev?)
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* COUNT 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 and HAVING to INSERT INTO table SELECT * FROM table2
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* lo_unlink() crashes server
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* Allow variable casts with BETWEEN 'today'::asbtime AND 'today'::abstime
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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=max(reftab.NUM)+1 WHERE tblname='reftab' fails
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* INSERT INTO ... SELECT DISTINCT ... generates error on DISTINCT
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* INSERT INTO table SELECT id, count(*) FROM table2 GROUP BY id generate error
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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
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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
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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 (Stefan)
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* add subselects, possibility using temporary SQL functions
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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, INTERSECTS, SUBTRACTS
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* add temporary tables
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* add sql3 recursive unions
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* add the concept of dataspaces
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* allow conversion type casts on SELECT target fields
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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
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* there are other problems, too.
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* Fix large object mapping scheme
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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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* can't vacuum large objects
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* can't reduce index file size with vacuum
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* Remove restriction that ORDER BY field must be in SELECT list(?)
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* Allow queries about owner of tables, like:
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* SELECT u.usesysid FROM postgres.pg_user u;
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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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* Allow readline-type or editor command editing of multi-line SQL commands
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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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* Remove stale files upon startup(Vivek)
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* Add command to show privileges
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* Allow INSERT INTO ... SELECT to convert column types
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* Add syslog functionality
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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 large objects have their own reltype
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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 and \d 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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PERFORMANCE
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-----------
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* Use indexes in ORDER BY
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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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* Is fsync use optimized?
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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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DOCUMENTATION
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-------------
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* Update usermanual source(many)
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* remove time-travel in documentation(Bruce)
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* added features used in grammer but not in docs, like :: and CAST
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* update libpq++ manual page
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PORTABILITY
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-----------
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---------------------------------------------------------------------------
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CHANGES IN THE 6.2.1 RELEASE
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Changes in this release
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-----------------------
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Allow TIME and TYPE column names(Thomas)
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Allow larger range of true/false as boolean values(Thomas)
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Support output of "now" and "current"(Thomas)
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Handle DEFAULT with INSERT of NULL properly(Vadim)
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Fix for relation reference counts problem in buffer manager(Vadim)
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Allow strings to span lines, like ANSI(Thomas)
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Fix for backward cursor with ORDER BY(Vadim)
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Fix avg(cash) computation(Thomas)
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Fix for specifying a column twice in ORDER/GROUP BY(Vadim)
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Documented new libpq function to return affected rows, PQcmdTuples(Bruce)
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Trigger function for inserting user names for INSERT/UPDATE(Brook Milligan)
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CHANGES IN THE 6.2 RELEASE
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Bug Fixes
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---------
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Fix problems with pg_dump for inheritance, sequences, archive tables(Bruce)
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Fix compile errors on overflow due to shifts, unsigned, and bad prototypes
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from Solaris(Diab Jerius)
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Fix bugs in geometric line arithmetic (bad intersection calculations)(Thomas)
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Check for geometric intersections at endpoints to avoid rounding ugliness(Thomas)
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Catch non-functional delete attempts(Vadim)
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Change time function names to be more consistent(Michael Reifenberg)
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Check for zero divides(Michael Reifenberg)
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Fix very old bug which made tuples changed/inserted by a commnd
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visible to the command itself (so we had multiple update of
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updated tuples, etc)(Vadim)
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Fix for SELECT null, 'fail' FROM pg_am (Patrick)
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SELECT NULL as EMPTY_FIELD now allowed(Patrick)
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Remove un-needed signal stuff from contrib/pginterface
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Fix OR (where x <> 1 or x isnull didn't return tuples with x NULL) (Vadim)
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Fix time_cmp function (Vadim)
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Fix handling of functions with non-attribute first argument in
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WHERE clauses (Vadim)
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Fix GROUP BY when order of entries is different from order
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in target list (Vadim)
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Fix pg_dump for aggregates without sfunc1 (Vadim)
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Enhancements
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------------
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Default genetic optimizer GEQO parameter is now 8(Bruce)
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Allow use parameters in target list having aggregates in functions(Vadim)
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Added JDBC driver as an interface(Adrian & Peter)
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pg_password utility
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Return number of tuples inserted/affected by INSERT/UPDATE/DELETE etc.(Vadim)
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Triggers implemented with CREATE TRIGGER (SQL3)(Vadim)
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SPI (Server Programming Interface) allows execution of queries inside
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C-functions (Vadim)
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NOT NULL implemented (SQL92)(Robson Paniago de Miranda)
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Include reserved words for string handling, outer joins, and unions(Thomas)
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Implement extended comments ("/* ... */") using exclusive states(Thomas)
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Add "//" single-line comments(Bruce)
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Remove some restrictions on characters in operator names(Thomas)
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DEFAULT and CONSTRAINT for tables implemented (SQL92)(Vadim & Thomas)
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Add text concatenation operator and function (SQL92)(Thomas)
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Support WITH TIME ZONE syntax (SQL92)(Thomas)
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Support INTERVAL <unit> TO <unit> syntax (SQL92)(Thomas)
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Define types DOUBLE PRECISION, INTERVAL, CHARACTER,
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and CHARACTER VARYING (SQL92)(Thomas)
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Define type FLOAT(p) and rudimentary DECIMAL(p,s), NUMERIC(p,s) (SQL92)(Thomas)
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Define EXTRACT(), POSITION(), SUBSTRING(), and TRIM() (SQL92)(Thomas)
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Define CURRENT_DATE, CURRENT_TIME, CURRENT_TIMESTAMP (SQL92)(Thomas)
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Add syntax and warnings for UNION, HAVING, INNER and OUTER JOIN (SQL92)(Thomas)
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Add more reserved words, mostly for SQL92 compliance(Thomas)
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Allow hh:mm:ss time entry for timespan/reltime types(Thomas)
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Add center() routines for lseg, path, polygon(Thomas)
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Add distance() routines for circle-polygon, polygon-polygon(Thomas)
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Check explicitly for points and polygons contained within polygons
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using an axis-crossing algorithm(Thomas)
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Add routine to convert circle-box(Thomas)
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Merge conflicting operators for different geometric data types(Thomas)
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Replace distance operator "<===>" with "<->"(Thomas)
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Replace "above" operator "!^" with ">^" and "below" operator "!|" with "<^"(Thomas)
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Add routines for text trimming on both ends, substring, and string position(Thomas)
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Added conversion routines circle(box) and poly(circle)(Thomas)
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Allow internal sorts to be stored in memory rather than in files(Bruce & Vadim)
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Allow functions and operators on internally-identical types to succeed(Bruce)
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Speed up backend startup after profiling analysis(Bruce)
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Inline frequently called functions for performance(Bruce)
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Reduce open() calls(Bruce)
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psql: Add PAGER for \h and \?,\C fix
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Fix for psql pager when no tty(Bruce)
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New entab utility(Bruce)
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General trigger functions for referential integrity (Vadim)
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General trigger functions for time travel (Vadim)
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General trigger functions for AUTOINCREMENT/IDENTITY feature (Vadim)
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MOVE implementation (Vadim)
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Source Tree Changes
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-------------------
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HPUX 10 patches (Vladimir Turin)
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Added SCO support, (Daniel Harris)
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mkLinux patches (Tatsuo Ishii)
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Change geometric box terminology from "length" to "width"(Thomas)
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Deprecate temporary unstored slope fields in geometric code(Thomas)
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Remove restart instructions from INSTALL(Bruce)
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Look in /usr/ucb first for install(Bruce)
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Fix c++ copy example code(Thomas)
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Add -o to psql manual page(Bruce)
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Prevent relname unallocated string length from being copied into database(Bruce)
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Cleanup for NAMEDATALEN use(Bruce)
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Fix pg_proc names over 15 chars in output(Bruce)
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Add strNcpy() function(Bruce)
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remove some (void) casts that are unnecessary(Bruce)
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new interfaces directory(Marc)
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Replace fopen() calls with calls to fd.c functions(Bruce)
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Make functions static where possible(Bruce)
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enclose unused functions in #ifdef NOT_USED(Bruce)
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Remove call to difftime() in timestamp support to fix SunOS(Bruce & Thomas)
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Changes for Digital Unix
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Portability fix for pg_dumpall(Bruce)
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Rename pg_attribute.attnvals to attdisbursion(Bruce)
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"intro/unix" manual page now "pgintro"(Bruce)
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"built-in" manual page now "pgbuiltin"(Bruce)
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"drop" manual page now "drop_table"(Bruce)
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Add "create_trigger", "drop_trigger" manual pages(Thomas)
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Add constraints regression test(Vadim & Thomas)
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Add comments syntax regression test(Thomas)
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Add PGINDENT and support program(Bruce)
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Massive commit to run PGINDENT on all *.c and *.h files(Bruce)
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Files moved to /src/tools directory(Bruce)
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SPI and Trigger programming guides (Vadim & D'Arcy)
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