TODO list for PostgreSQL
========================
-Last updated: Sun Sep 26 20:37:50 EDT 1999
+Last updated: Sun Sep 26 23:23:58 EDT 1999
Current maintainer: Bruce Momjian (maillist@candle.pha.pa.us)
A dash(-) marks changes that will appear in the next release.
+Names in brackets "[]" indicate more detailed information is available in
+the directory pgsql/doc/TODO.detail/ under that name.
+
RELIABILITY
-----------
* Alter TABLE ADD COLUMN does not honor DEFAULT, add CONSTRAINT
* Do not allow bpchar column creation without length
* Select a[1] FROM test fails, it needs test.a[1]
-* -Array index references without table name cause problems
- (see TODO.detail/array)
+* -Array index references without table name cause problems [array]
* Update table SET table.value = 3 fails
* Creating index of TIMESTAMP & RELTIME fails, or rename to DATETIME(Thomas)
* SELECT foo UNION SELECT foo is incorrectly simplified to SELECT foo
* UNION with LIMIT fails
* Unique index on base column not honored on inserts from inherited table
INSERT INTO inherit_table (unique_index_col) VALUES (dup) should fail
- (see TODO.detail/inherit)
+ [inherit]
* CREATE TABLE x AS SELECT 1 UNION SELECT 2 fails
* CREATE TABLE test(col char(2) DEFAULT user) fails in length restriction
-* mismatched types in CREATE TABLE ... DEFAULT causes problems
- (see TODO.detail/default)
+* mismatched types in CREATE TABLE ... DEFAULT causes problems [default]
* SELECT ... UNION ... ORDER BY fails when sort expr not in result list
* Be smarter about promoting types when UNION merges different data types
* SELECT ... UNION ... GROUP BY fails if column types disagree
* redesign INSERT ... SELECT to have two levels of target list
* -select * from pg_class where oid in (0,-1)
* have INTERSECT/EXCEPT prevent duplicates unless ALL is specified
-* prevent primary key of nine columns(see TODO.detail/primary)
+* prevent primary key of nine columns [primary]
* SELECT COUNT('asdf') FROM pg_class WHERE oid=12 crashes
-* SELECT DISTINCT ON col1 col1 col2 FROM tab1 is broken
- (see TODO.detail/distinct)
+* SELECT DISTINCT ON col1 col1 col2 FROM tab1 is broken [distinct]
VIEWS
URGENT
-* Add referential integrity(Jan?)(see TODO.detail/primary)
-* Add OUTER joins, left and right(see TODO.detail/outer)(Thomas, Bruce)
+* Add referential integrity(Jan?)[primary]
+* Add OUTER joins, left and right[outer](Thomas, Bruce)
* Allow long tuples by chaining or auto-storing outside db (chaining,large objs)
* Eliminate limits on query length
-* Fix memory leak for expressions?(see TODO.detail/memory)(Tom?)
+* Fix memory leak for expressions?[memory](Tom?)
* -Fix memory leak for aggregates?
ADMIN
* Add syslog functionality
* Allow elog() to return error codes, not just messages
* Allow international error message support and add error codes
-* Generate postmaster pid file and remove flock/fcntl lock code
- (see TODO.detail/flock)
-* Add ability to specifiy location of lock/socket files (see TODO.detail/flock)
+* Generate postmaster pid file and remove flock/fcntl lock code [flock]
+* Add ability to specifiy location of lock/socket files [flock]
TYPES
* Add non-large-object binary field
* Add index on NUMERIC/DECIMAL type
* Make Absolutetime/Relativetime int4 because time_t can be int8 on some ports
-* Functions returning sets don't really work right(see TODO.detail/function)
+* Functions returning sets don't really work right[function]
VIEWS
COMMANDS
-* ALTER TABLE ADD COLUMN to inherited table put column in wrong place
- (see TODO.detail/inherit)
+* ALTER TABLE ADD COLUMN to inherited table put column in wrong place [inherit]
* Add ALTER TABLE DROP/ALTER COLUMN feature
* Allow CLUSTER on all tables at once, and improve CLUSTER, loses NOT
- NULL specification on table(see TODO.detail/cluster)
+ NULL specification on table [cluster]
* Generate error on CREATE OPERATOR of ~~, ~ and and ~*
* Add SIMILAR TO to allow character classes, 'pg_[a-c]%'
* Auto-destroy sequence on DROP of table with SERIAL(Ryan)
* Allow LOCK TABLE tab1, tab2, tab3 so all tables locked in unison
* Allow INSERT/UPDATE of system-generated oid value for a row
-* Allow ESCAPE '\' at the end of LIKE for ANSI compliance(see TODO.detail/like)
+* Allow ESCAPE '\' at the end of LIKE for ANSI compliance [like]
* Rewrite the LIKE handling by rewriting the user string with the
- supplied ESCAPE(see TODO.detail/like)
+ supplied ESCAPE [like]
* Move LIKE index optimization handling to the optimizer
* Allow RULE recompilation
* Support UNION/INTERSECT/EXCEPT in sub-selects
* Update reltuples from COPY command
* Allow psql \copy to allow delimiters
* Add a function to return the last inserted oid, for use in psql scripts
-* Allow psql to print nulls as distinct from ""(see TODO.detail/null)
+* Allow psql to print nulls as distinct from "" [null]
* PQrequestCancel() be able to terminate backend waiting for lock
EXOTIC FEATURES
* Allow cursors to be DECLAREd/OPENed/CLOSEed outside transactions
* Allow PQrequestCancel() to terminate when in waiting-for-lock state
* -Transaction log, so re-do log can be on a separate disk by
- with after-row images(Vadim) (see TODO.detail/logging)
+ with after-row images(Vadim) [logging]
* Populate backend status area and write program to dump status data
* Make oid use unsigned int more reliably, pg_atoi()
* Allow subqueries in target list
* Put sort files, large objects in their own directory
* Do autocommit so always in a transaction block(?)
-* Show location of syntax error in query (see TODO.detail/yacc)
-* Redesign the function call interface to handle NULLs better
- (see TODO.detail/function)
-* Document/trigger/rule so changes to pg_shadow recreate pg_pwd
- (see TODO.detail/pg_shadow)
-* Missing optimizer selectivities for date, r-tree, etc.
- (see TODO.detail/optimizer)
+* Show location of syntax error in query [yacc]
+* Redesign the function call interface to handle NULLs better [function]
+* Document/trigger/rule so changes to pg_shadow recreate pg_pwd [pg_shadow]
+* Missing optimizer selectivities for date, r-tree, etc. [optimizer]
* Overhaul mdmgr/smgr to fix double unlinking and double opens, cleanup
* Overhaul bufmgr/lockmgr/transaction manager
* Add PL/Perl(Mark Hollomon)
FSYNC
-* -Allow transaction commits with rollback with no-fsync performance
- (see TODO.detail/fsync)
+* -Allow transaction commits with rollback with no-fsync performance [fsync]
* -Prevent fsync in SELECT-only queries
INDEXES
non-consecutive keys or OR clauses, so fewer heap accesses
* Convert function(constant) into a constant for index use
* Allow LIMIT ability on single-table queries that have no ORDER BY to use
- a matching index(see TODO.detail/limit)
-* Improve LIMIT processing by using index to limit rows processed
- (see TODO.detail/limit)
-* Have optimizer take LIMIT into account when considering index scans
- (see TODO.detail/limit)
+ a matching index [limit]
+* Improve LIMIT processing by using index to limit rows processed [limit]
+* Have optimizer take LIMIT into account when considering index scans [limit]
* Make index creation use psort code, because it is now faster(Vadim)
* Allow creation of sort temp tables > 1 Gig
* Create more system table indexes for faster cache lookups
* fix indexscan() so it does leak memory by not requiring caller to free
* Improve _bt_binsrch() to handle equal keys better, remove _bt_firsteq()(Tom)
-* Allow SELECT * FROM tab WHERE int2col = 4 use int2col index
- (see TODO.detail/optimizer)
+* Allow SELECT * FROM tab WHERE int2col = 4 use int2col index, int8 too
+ [optimizer]
* Allow optimizer to prefer plans that match ORDER BY
CACHE
-* Cache most recent query plan(s)(see TODO.detail/prepare)
+* Cache most recent query plan(s) [prepare]
* Shared catalog cache, reduce lseek()'s by caching table size in shared area
* elog() flushes cache, try invalidating just entries from current xact,
perhaps using invalidation cache
* Update pg_statistic table to remove operator column
* Allow char() not to use variable-sized header to reduce disk size
* Do async I/O to do better read-ahead of data
-* -Fix memory exhaustion when using many OR's(see TODO.detail/cnfify)
+* -Fix memory exhaustion when using many OR's [cnfify]
* Get faster regex() code from Henry Spencer <henry@zoo.utoronto.ca>
when it is available
* Use mmap() rather than SYSV shared memory(?)
* use fmgr_info()/fmgr_faddr() instead of fmgr() calls in high-traffic
places, like GROUP BY, UNIQUE, index processing, etc.
* improve dynamic memory allocation by introducing tuple-context memory
- allocation(see TODO.detail/memory)
+ allocation [memory]
* fix memory leak in cache code when non-existant table is referenced
* In WHERE tab1.x=3 AND tab1.x=tab2.y, add tab2.y=3
-* pass atttypmod through parser in more cases(see TODO.detail/atttypmod)
+* pass atttypmod through parser in more cases [atttypmod]
* remove duplicate type in/out functions for disk and net
* change VACUUM ANALYZE to use btree comparison functions, not <,=,> calls
-* Allow persistent backends(see TODO.detail/persistent)
-* Misc(see TODO.detail/performance)
+* Allow persistent backends [persistent]
+* Misc [performance]
SOURCE CODE
-----------
* Add use of 'const' for varibles in source tree
-* Fix C optimizer problem where fmgr_ptr calls return different types
- (see TODO.detail/alpha)
+* Fix C optimizer problem where fmgr_ptr calls return different types [alpha]
* -Add needed includes and removed unneeded include files(Bruce)
* Make configure --enable-debug add -g on compile line
* Does Mariposa source contain any other bug fixes?
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