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Older
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
A dash (-) marks changes that will appear in the upcoming 7.2 release.
Bracketed items "[]" have more detailed information at
http://www.postgresql.org/docs/todo.html.
* -SELECT pg_class FROM pg_class generates strange error (Bruce)
* PL/PgSQL does not handle quoted mixed-case identifiers
* Add replication of distributed databases [replication]
o load balancing
o master/slave replication
o multi-master replication
o partition data across servers
o sample implementation in contrib/rserv
o queries across databases or servers (two-phase commit)
* Point-in-time data recovery using backup and write-ahead log
* Improve control over user privileges, including table creation and
* -Permission to DELETE table also allows UPDATE (Peter E)
* Allow elog() to return error codes, module name, file name, line
* Allow international error message support and add error codes [elog]
* Remove unused files during database vacuum or postmaster startup
* Encrpyt passwords in pg_shadow table using MD5 (Vince)
* Support construction of array result values in expressions
* Remove Money type, add money formatting for decimal type
* Declare typein/out functions in pg_proc with a special "C string" data type
Bruce Momjian
committed
* Add non-large-object binary field
* Allow better handling of numeric constants, type conversion [typeconv]
* Missing optimizer selectivities for date, r-tree, etc. [optimizer]
* SELECT cash_out(2) crashes because of opaque
* ARRAYS
* Allow nulls in arrays
* Allow arrays to be ORDER'ed
* fix array handling in ECPG
* Add NCHAR (as distinguished from ordinary varchar),
* Support multiple simultaneous character sets, per SQL92
* Reject character sequences those are not valid in their charset
* Make functions more multi-byte aware, i.e. trim()
* Make n of CHAR(n)/VARCHAR(n) the number of letters, not bytes
* Automatically create rules on views so they are updateable, per SQL92
* Add the functionality for WITH CHECK OPTION clause of CREATE VIEW
* Evaluate INSERT rules at end of query, rather than beginning
* Allow CREATE INDEX zman_index ON test (date_trunc( 'day', zman ) datetime_ops)
fails index can't store constant parameters
* Allow inherited tables to inherit index, UNIQUE constraint, and primary key
* UNIQUE INDEX on base column not honored on inserts from inherited table
INSERT INTO inherit_table (unique_index_col) VALUES (dup) should fail
[inheritance]
* Prevent pg_attribute from having duplicate oids for indexes (Tom)
* Add UNIQUE capability to non-btree indexes
* Certain indexes will not shrink, e.g. oid indexes with many inserts (Vadim)
* Add btree index support for reltime, tinterval, regproc
* Add rtree index support for line, lseg, path, point
* Use indexes for min() and max()
* Use index to restrict rows returned by multi-key index when used with
non-consecutive keys or OR clauses, so fewer heap accesses
* Allow SELECT * FROM tab WHERE int2col = 4 to use int2col index, int8,
float4, numeric/decimal too [optimizer]
* Use indexes with CIDR '<<' (contains) operator
* Allow LIKE indexing optimization for non-ASCII locales
* Be smarter about insertion of already-ordered data into btree index
* -Gather more accurate dispersion statistics using indexes (Tom)
* Add deleted bit to index tuples to reduce heap access
* Prevent index uniqueness checks when UPDATE does not modifying column
SYSTEM TABLES
* Add unique indexes to pg_shadow.usename and pg_shadow.usesysid or
switch to pg_shadow.oid as user id
* Add unique indexes on pg_database
* Check all system tables and add unique indexes as needed
* Remove pg_listener index
* -Remove unused pg_variable, pg_inheritproc, pg_ipl tables (Bruce)
* Add SIMILAR TO to allow character classes, 'pg_[a-c]%'
* Auto-destroy sequence on DROP of table with SERIAL, perhaps with a separate
SERIAL type
* Allow LOCK TABLE tab1, tab2, tab3 so all tables locked in unison [lock]
* Allow RULE recompilation
* Add BETWEEN ASYMMETRIC/SYMMETRIC
* Change LIMIT val,val to offset,limit to match MySQL
* ALTER TABLE ADD COLUMN does not honor DEFAULT and non-CHECK
CONSTRAINT
* ALTER TABLE ADD COLUMN to inherited table put column in wrong place
[inheritance]
* Add ALTER TABLE DROP COLUMN feature [drop]
* -Add ALTER TABLE DROP CHECK CONSTRAINT (Christopher Kings-Lynne)
* ALTER TABLE ADD PRIMARY KEY (Christopher Kings-Lynne)
* ALTER TABLE ADD UNIQUE (Christopher Kings-Lynne)
* COPY
* Allow specification of column names
* Allow dump/load of CSV format
* CURSOR
* Allow BINARY option to SELECT, like we do with DECLARE
* MOVE 0 should not move to end of cursor
* Allow cursors to be DECLAREd/OPENed/CLOSEed outside transactions
* Allow DELETE WHERE CURRENT OF cursor
* INSERT
* Allow INSERT/UPDATE of system-generated oid value for a row
* Allow INSERT INTO tab (col1, ..) VALUES (val1, ..), (val2, ..)
* Allow INSERT INTO my_table VALUES (a, b, c, DEFAULT, x, y, z, ...)
* Disallow missing columns in INSERT ... VALUES, per ANSI
* Allow INSERT/UPDATE ... RETURNING new.col or old.col (Philip)
* SHOW/SET
* Add SHOW command to display locks
* Add a global RESET command for use with connection pooling
* Add SET or BEGIN timeout parameter to cancel query if waiting too long
* Add SET REAL_FORMAT and SET DOUBLE_PRECISION_FORMAT using printf args
* Remove SET KSQO option now that OR processing is improved (Tom)
* Add SET PERFORMANCE_TIPS option to suggest INDEX, VACUUM, VACUUM
ANALYZE, and CLUSTER
* -Make NULL's come out at the beginning or end depending on the
ORDER BY direction (Tom)
* have pg_dump use LEFT OUTER JOIN in multi-table SELECTs
or multiple SELECTS to avoid bad system catalog entries
REFERENTIAL INTEGRITY
* Add MATCH PARTIAL referential integrity
* -Check that primary key exists at foreign key definition time
* Prevent column dropping if column is used by foreign key
* Propagate column or table renaming to foreign key constraints
* INSERT & UPDATE/DELETE in transaction of primary key fails with
deferredTriggerGetPreviousEvent or "change violation" [foreign]
* Change foreign key constraint for array -> element to mean element
in array
* Automatically drop constraints/functions when object is dropped
TRANSACTIONS
* Implement UNDO using transaction log, overwriting storage manager?
[vacuum] (Vadim)
* Allow autocommit so always in a transaction block
* Overhaul bufmgr/lockmgr/transaction manager
* Allow nested transactions (Vadim)
* Handle transaction rollover [transactions]
EXOTIC FEATURES
* Add sql3 recursive unions
* Add the concept of dataspaces/tablespaces [tablespaces]
* Allow queries across multiple databases
* Add pre-parsing phase that converts non-ANSI features to supported features
* SQL*Net listener that makes PostgreSQL appear as an Oracle database
* Increase identifier length(NAMEDATALEN) if small performance hit
* Create a background process for each database that runs while
database is idle, finding superceeded rows, gathering stats and
vacuuming (Tom)
* Populate backend status area and write program to dump status data (Jan)
* -Put sort files in their own directory (Bruce)
* Add sed-like regular expression search/replace capability
* Change representation of whole-tuple parameters to functions
* Delay fsync() when other backends are about to commit too [fsync]
* Determine optimal fdatasync/fsync, O_SYNC/O_DSYNC options
* Allow multiple blocks to be written to WAL with one write()
* Cache most recent query plan(s) (Karel) [prepare]
* Shared catalog cache, reduce lseek()'s by caching table size in shared area
VACUUM
* Improve speed with indexes (perhaps recreate index instead) [vacuum]
* Reduce lock time by moving tuples with read lock, then write
lock and truncate table [vacuum]
* -Make ANALYZE a separate command (Tom)
* -Allow ANALYZE to ESTIMATE based on certain random precentage of rows (Tom)
* Do async I/O to do better read-ahead of data
* Get faster regex() code from Henry Spencer <henry@zoo.utoronto.ca>
* Allow Subplans to use efficient joins(hash, merge) with upper variable
* improve dynamic memory allocation by introducing tuple-context memory
* -Improve statistics storage in pg_class [performance] (Tom)
* Create a transaction processor to aid in persistent connections and
connection pooling
* Make blind writes go through the file descriptor cache
* Add use of 'const' for variables in source tree
* Convert remaining fprintf(stderr,...)/perror() to elog()
* Fix problems with libpq non-blocking/async code [async]
* Remove compile-time upper limit on number of backends (MAXBACKENDS) (Tom)
* Make sure all block numbers are unsigned to increase maximum table size
* Merge LockMethodCtl and LockMethodTable into one shared structure (Bruce)
* HOLDER/HOLDERTAB reanme to PROCLOCKLINK/PROCLOCKLINKTAG (Tom)
* Add version file format stamp to heap and other table types
* Make elog(LOG) in WAL its own output type, distinct from DEBUG
* Move some things from /contrib into main tree, like soundex
* Allow plug-in modules to emulate features from other databases
* Move platform-specific ps status display info from ps_status.c to ports
* Allow ps status display to work on Solaris/SVr4-based systems
* Add mention of VACUUM, log rotation to Administrator's Guide
---------------------------------------------------------------------------
Developers who have claimed items are:
--------------------------------------
* Billy is Billy G. Allie <Bill.Allie@mug.org>
* D'Arcy is D'Arcy J.M. Cain <darcy@druid.net>
* Edmund is Edmund Mergl <E.Mergl@bawue.de>
* Hiroshi is Hiroshi Inoue <Inoue@tpf.co.jp>
* Karel is Karel Zak <zakkr@zf.jcu.cz>
* Jan is Jan Wieck <wieck@sapserv.debis.de>
* Michael is Michael Meskes <meskes@postgresql.org>
* Oleg is Oleg Bartunov <oleg@sai.msu.su>
* Ross is Ross J. Reedstrom <reedstrm@wallace.ece.rice.edu>
* Stephan is Stephan Szabo <sszabo@megazone23.bigpanda.com>
* Tatsuo is Tatsuo Ishii <t-ishii@sra.co.jp>
* Thomas is Thomas Lockhart <lockhart@alumni.caltech.edu>
* TomH is Tom I Helbekkmo <tih@Hamartun.Priv.NO>