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@ -1,6 +1,6 @@ |
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TODO list for PostgreSQL |
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======================== |
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Last updated: Mon Sep 6 23:55:43 EDT 1999 |
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Last updated: Sun Oct 10 16:40:40 EDT 1999 |
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Current maintainer: Bruce Momjian (maillist@candle.pha.pa.us) |
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@ -9,6 +9,9 @@ the PostgreSQL web site, http://www.PostgreSQL.org. |
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A dash(-) marks changes that will appear in the next release. |
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Names in brackets "[]" indicate more detailed information is available in |
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the directory pgsql/doc/TODO.detail/ under that name. |
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RELIABILITY |
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----------- |
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@ -17,7 +20,7 @@ RESOURCES |
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* Elog() does not free all its memory(Jan) |
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* spinlock stuck problem when elog(FATAL) and elog(ERROR) inside bufmgr |
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* Recover or force failure when disk space is exhausted |
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* -Recover or force failure when disk space is exhausted(Hiroshi) |
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PARSER |
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@ -26,29 +29,38 @@ PARSER |
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* SELECT pg_class FROM pg_class generates strange error |
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* Alter TABLE ADD COLUMN does not honor DEFAULT, add CONSTRAINT |
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* Do not allow bpchar column creation without length |
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* Select a[1] FROM test fails, it needs test.a[1] |
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* -Array index references without table name cause problems |
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* Update table SET table.value = 3 fails |
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* -Select a[1] FROM test fails, it needs test.a[1](Tom) |
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* -Array index references without table name cause problems [array](Tom) |
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* Update table SET table.value = 3 fails(SQL standard says this is OK) |
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* Creating index of TIMESTAMP & RELTIME fails, or rename to DATETIME(Thomas) |
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* SELECT foo UNION SELECT foo is incorrectly simplified to SELECT foo |
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* -INSERT ... SELECT ... GROUP BY groups by target columns not source columns |
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* -CREATE TABLE test (a char(5) DEFAULT text '', b int4) fails on INSERT |
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* -INSERT ... SELECT ... GROUP BY groups by target columns not source columns(Tom) |
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* -CREATE TABLE test (a char(5) DEFAULT text '', b int4) fails on INSERT(Tom) |
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* UNION with LIMIT fails |
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* Unique index on base column not honored on inserts from inherited table |
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INSERT INTO inherit_table (unique_index_col) VALUES (dup) should fail |
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[inherit] |
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* CREATE TABLE x AS SELECT 1 UNION SELECT 2 fails |
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* CREATE TABLE test(col char(2) DEFAULT user) fails in length restriction |
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* mismatched types in CREATE TABLE ... DEFAULT causes problems [default] |
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* SELECT ... UNION ... ORDER BY fails when sort expr not in result list |
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* Be smarter about promoting types when UNION merges different data types |
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* SELECT ... UNION ... GROUP BY fails if column types disagree |
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* redesign INSERT ... SELECT to have two levels of target list |
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* -select * from pg_class where oid in (0,-1) |
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* have INTERSECT/EXCEPT prevent duplicates unless ALL is specified |
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* prevent primary key of nine columns [primary] |
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* SELECT COUNT('asdf') FROM pg_class WHERE oid=12 crashes |
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* SELECT DISTINCT ON col1 col1 col2 FROM tab1 is broken [distinct] |
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* -When using aggregates + GROUP BY, no rows in should yield no rows out(Tom) |
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* -Allow HAVING to use comparisons that have no aggregates(Tom) |
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VIEWS |
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* Views containing aggregates sometimes fail(Jan) |
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* Views with spaces in view name fail when referenced |
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* Creating view and inheriting the view causes view* to show |
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duplicates(inherit) |
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MISC |
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@ -56,27 +68,30 @@ MISC |
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* Plpgsql does not handle quoted mixed-case identifiers |
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* Fix btree to give a useful elog when key > 1/2 (page - overhead) |
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* pg_dump should preserve primary key information |
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* plpgsql regression tests fail on BSD/OS |
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* database names with spaces fail |
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ENHANCEMENTS |
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------------ |
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URGENT |
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* Add referential integrity(Jan?) |
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* Add OUTER joins, left and right(Thomas, Bruce) |
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* Add referential integrity(Jan?)[primary] |
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* Add OUTER joins, left and right[outer](Thomas, Bruce) |
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* Allow long tuples by chaining or auto-storing outside db (chaining,large objs) |
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* Eliminate limits on query length |
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* Fix memory leak for expressions?, aggregates?(Tom?) |
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* Fix memory leak for expressions[memory](Tom?) |
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* -Fix memory leak for aggregates(Tom) |
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ADMIN |
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* Better interface for adding to pg_group |
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* More access control over who can create tables and access the database |
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* Add syslog functionality |
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* Test syslog functionality |
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* Allow elog() to return error codes, not just messages |
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* Allow international error message support and add error codes |
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* Generate postmaster pid file and remove flock/fcntl lock code |
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* Add ability to specifiy location of lock/socket files |
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* Generate postmaster pid file and remove flock/fcntl lock code [flock] |
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* Add ability to specifiy location of lock/socket files [flock] |
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TYPES |
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@ -99,11 +114,14 @@ TYPES |
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* Add support for & operator |
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* Allow LOCALE on a per-column basis, default to ASCII |
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* Allow array on int8[] |
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* Allow nulls in arrays |
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* Allow arrays to be ORDER'ed |
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* Remove Money type, add money formatting for decimal type |
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* Declare typein/out functions in pg_proc with a special "C string" data type |
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* Add non-large-object binary field |
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* Add index on NUMERIC/DECIMAL type |
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* -Add index on NUMERIC/DECIMAL type(Jan) |
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* Make Absolutetime/Relativetime int4 because time_t can be int8 on some ports |
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* Functions returning sets don't really work right[function] |
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VIEWS |
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@ -116,7 +134,7 @@ INDEXES |
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* Allow CREATE INDEX zman_index ON test (date_trunc( 'day', zman ) datetime_ops) |
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fails index can't store constant parameters |
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* Allow creation of functional indexes to use default types |
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* Permissions on indexes - prevent them? |
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* Permissions on indexes, prevent them? |
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* Allow SQL function indexes |
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* Add FILLFACTOR to index creation |
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* Allow indexing of LIKE with localle character sets |
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@ -124,20 +142,21 @@ INDEXES |
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COMMANDS |
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* ALTER TABLE ADD COLUMN to inherited table put column in wrong place |
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* ALTER TABLE ADD COLUMN to inherited table put column in wrong place [inherit] |
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* Add ALTER TABLE DROP/ALTER COLUMN feature |
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* Allow CLUSTER on all tables at once, and improve CLUSTER |
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* Generate error on CREATE OPERATOR of ~~, ~ and and ~* |
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* Allow CLUSTER on all tables at once, and improve CLUSTER, loses NOT |
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NULL specification on table [cluster] |
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* Add SIMILAR TO to allow character classes, 'pg_[a-c]%' |
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* Auto-destroy sequence on DROP of table with SERIAL(Ryan) |
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* Allow LOCK TABLE tab1, tab2, tab3 so all tables locked in unison |
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* Allow INSERT/UPDATE of system-generated oid value for a row |
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* Allow ESCAPE '\' at the end of LIKE for ANSI compliance |
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* Allow ESCAPE '\' at the end of LIKE for ANSI compliance [like] |
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* Rewrite the LIKE handling by rewriting the user string with the |
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supplied ESCAPE |
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* Move LIKE index optimization handling to the optimizer |
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supplied ESCAPE [like] |
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* -Move LIKE index optimization handling to the optimizer(Tom) |
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* Allow RULE recompilation |
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* Support UNION/INTERSECT/EXCEPT in sub-selects |
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* Allow DELETE and UPDATE to use inheritance using tablename* |
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CLIENTS |
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@ -147,8 +166,7 @@ CLIENTS |
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* Update reltuples from COPY command |
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* Allow psql \copy to allow delimiters |
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* Add a function to return the last inserted oid, for use in psql scripts |
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* Allow psql to print nulls as distinct from ""(?) |
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* PQrequestCancel() be able to terminate backend waiting for lock |
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* Allow psql to print nulls as distinct from "" [null] |
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EXOTIC FEATURES |
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@ -156,6 +174,7 @@ EXOTIC FEATURES |
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* Add the concept of dataspaces |
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* Add replication of distributed databases |
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* Allow queries across multiple databases |
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* Allow nested transactions |
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MISC |
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@ -164,23 +183,23 @@ MISC |
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* Create a background process for each database that runs while |
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database is idle, finding superceeded rows, gathering stats and vacuuming |
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* Add UNIQUE capability to non-btree indexes |
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* Certain indexes will not shrink, i.e. oid indexes with many inserts |
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* -Certain indexes will not shrink, i.e. oid indexes with many inserts(Vadim) |
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* Restore unused oid's on backend exit if no one else has gotten oids |
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* Have UPDATE/DELETE clean out indexes |
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* Allow WHERE restriction on ctid |
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* -Allow WHERE restriction on ctid(Hiroshi) |
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* Allow cursors to be DECLAREd/OPENed/CLOSEed outside transactions |
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* Allow PQrequestCancel() to terminate when in waiting-for-lock state |
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* Transaction log, so re-do log can be on a separate disk by |
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with after-row images(Vadim) |
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* -Transaction log, so re-do log can be on a separate disk by |
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with after-row images(Vadim) [logging](Vadim) |
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* Populate backend status area and write program to dump status data |
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* Make oid use unsigned int more reliably, pg_atoi() |
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* Allow subqueries in target list |
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* Put sort files, large objects in their on directory |
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* Do autocommit so always in a transaction block |
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* Show location of syntax error in query |
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* Redesign the function call interface to handle NULLs better(Jan) |
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* Document/trigger/rule so changes to pg_shadow create pg_pwd |
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* Missing optimizer selectivities for date, r-tree, etc. |
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* Put sort files, large objects in their own directory |
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* Do autocommit so always in a transaction block(?) |
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* Show location of syntax error in query [yacc] |
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* Redesign the function call interface to handle NULLs better [function] |
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* Document/trigger/rule so changes to pg_shadow recreate pg_pwd [pg_shadow] |
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* Missing optimizer selectivities for date, r-tree, etc. [optimizer] |
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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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* Add PL/Perl(Mark Hollomon) |
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@ -188,14 +207,15 @@ MISC |
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* Add configure test to check for C++ need for *.h and namespaces |
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* Allow BLCKSZ <= 64k, not <= 32k |
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* redesign UNION structures to have separarate target lists |
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* Allow multi-level query trees for INSERT INTO ... SELECT |
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PERFORMANCE |
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FSYNC |
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* Allow transaction commits with rollback with no-fsync performance |
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* Prevent fsync in SELECT-only queries |
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* -Allow transaction commits with rollback with no-fsync performance [fsync](Vadim) |
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* -Prevent fsync in SELECT-only queries(Vadim) |
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INDEXES |
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@ -203,22 +223,23 @@ INDEXES |
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* Pull requested data directly from indexes, bypassing heap data |
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* Use index to restrict rows returned by multi-key index when used with |
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non-consecutive keys or OR clauses, so fewer heap accesses |
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* Convert function(constant) into a constant for index use |
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* -Convert function(constant) into a constant for index use(Tom) |
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* Allow LIMIT ability on single-table queries that have no ORDER BY to use |
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a matching index |
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* Improve LIMIT processing by using index to limit rows processed |
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* Have optimizer take LIMIT into account when considering index scans |
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a matching index [limit] |
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* Improve LIMIT processing by using index to limit rows processed [limit] |
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* Have optimizer take LIMIT into account when considering index scans [limit] |
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* Make index creation use psort code, because it is now faster(Vadim) |
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* Allow creation of sort temp tables > 1 Gig |
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* Create more system table indexes for faster cache lookups |
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* fix indexscan() so it does leak memory by not requiring caller to free |
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* Improve _bt_binsrch() to handle equal keys better, remove _bt_firsteq()(Tom) |
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* Allow SELECT * FROM tab WHERE int2col = 4 use int2col index |
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* Allow optimizer to prefer plans that match ORDER BY |
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* Allow SELECT * FROM tab WHERE int2col = 4 use int2col index, int8, |
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float4, numeric/decimal too [optimizer] |
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* -Allow optimizer to prefer plans that match ORDER BY(Tom) |
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CACHE |
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* Cache most recent query plan(s?) |
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* Cache most recent query plan(s) [prepare] |
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* Shared catalog cache, reduce lseek()'s by caching table size in shared area |
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* elog() flushes cache, try invalidating just entries from current xact, |
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perhaps using invalidation cache |
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@ -227,33 +248,37 @@ CACHE |
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MISC |
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* Allow compression of log and meta data |
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* Update pg_statistic table to remove operator column |
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* Allow char() not to use variable-sized header to reduce disk size |
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* Do async I/O to do better read-ahead of data |
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* -Fix memory exhaustion when using many OR's |
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* -Fix memory exhaustion when using many OR's [cnfify](Tom) |
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* Get faster regex() code from Henry Spencer <henry@zoo.utoronto.ca> |
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when it is available |
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* Use mmap() rather than SYSV shared memory(?) |
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* Process const = const parts of OR clause in separate pass |
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* -Process const = const parts of OR clause in separate pass(Tom) |
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* Make oid use oidin/oidout not int4in/int4out in pg_type.h |
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* Improve Subplan list handling |
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* Allow Subplans to use efficient joins(hash, merge) with upper variable |
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[subquery] |
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* use fmgr_info()/fmgr_faddr() instead of fmgr() calls in high-traffic |
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places, like GROUP BY, UNIQUE, index processing, etc. |
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* improve dynamic memory allocation by introducing tuple-context memory |
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allocation |
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allocation [memory] |
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* fix memory leak in cache code when non-existant table is referenced |
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* In WHERE tab1.x=3 AND tab1.x=tab2.y, add tab2.y=3 |
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* pass atttypmod through parser in more cases(Bruce) |
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* pass atttypmod through parser in more cases [atttypmod] |
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* remove duplicate type in/out functions for disk and net |
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* Allow persistent backends [persistent] |
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* Misc [performance] |
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SOURCE CODE |
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* Add use of 'const' for varibles in source tree |
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* Fix C optimizer problem where fmgr_ptr calls return different types |
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* Add needed includes and removed unneede include files(Bruce) |
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* Fix C optimizer problem where fmgr_ptr calls return different types [alpha] |
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* -Add needed includes and removed unneeded include files(Bruce) |
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* Make configure --enable-debug add -g on compile line |
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* Does Mariposa source contain any other bug fixes? |
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* Remove SET KSQO option if OR processing is improved(Tom) |
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* rename 'createuser' to 'pg_createuser', and add 'pg_' to other commands |
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--------------------------------------------------------------------------- |
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Bruce Momjian
26 years ago