TODO list for PostgreSQL

========================

Last updated:Tue Oct5 17:11:29 EDT 1999

Last updated:Wed Oct6 09:35:16 EDT 1999

Current maintainer:Bruce Momjian (maillist@candle.pha.pa.us)

* Elog() does not free all its memory(Jan)

* spinlock stuck problem when elog(FATAL) and elog(ERROR) inside bufmgr

* Recover or force failure when disk space is exhausted

*-Recover or force failure when disk space is exhausted(Hiroshi)

PARSER

* SELECT pg_class FROM pg_class generates strange error

* 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 [array]

* -Select a[1] FROM test fails, it needs test.a[1](Tom)

* -Array index references without table name cause problems [array](Tom)

* Update table SET table.value = 3 fails(SQL standard says this is OK)

* Creating index of TIMESTAMP & RELTIME fails, or rename to DATETIME(Thomas)

* SELECT foo UNION SELECT foo is incorrectly simplified to SELECT foo

* -INSERT ... SELECT ... GROUP BY groups by target columns not source columns

* -CREATE TABLE test (a char(5) DEFAULT text '', b int4) fails on INSERT

* -INSERT ... SELECT ... GROUP BY groups by target columns not source columns(Tom)

* -CREATE TABLE test (a char(5) DEFAULT text '', b int4) fails on INSERT(Tom)

* 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

* 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 [distinct]

* -When using aggregates + GROUP BY, no rows in should yield no rows out

* -When using aggregates + GROUP BY, no rows in should yield no rows out(Tom)

VIEWS

* 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?[memory](Tom?)

* -Fix memory leak for aggregates?

* Fix memory leak for expressions[memory](Tom?)

* -Fix memory leak for aggregates(Tom)

ADMIN

* Remove Money type, add money formatting for decimal type

* Declare typein/out functions in pg_proc with a special "C string" data type

* Add non-large-object binary field

* -Add index on NUMERIC/DECIMAL type

* -Add index on NUMERIC/DECIMAL type(Jan)

* Make Absolutetime/Relativetime int4 because time_t can be int8 on some ports

* Functions returning sets don't really work right[function]

* Allow CREATE INDEX zman_index ON test (date_trunc( 'day', zman ) datetime_ops)

fails index can't store constant parameters

* Allow creation of functional indexes to use default types

* Permissions on indexes - prevent them?

* Permissions on indexes, prevent them?

* Allow SQL function indexes

* Add FILLFACTOR to index creation

* Allow indexing of LIKE with localle character sets

* Allow ESCAPE '\' at the end of LIKE for ANSI compliance [like]

* Rewrite the LIKE handling by rewriting the user string with the

supplied ESCAPE [like]

* -Move LIKE index optimization handling to the optimizer

* -Move LIKE index optimization handling to the optimizer(Tom)

* Allow RULE recompilation

* Support UNION/INTERSECT/EXCEPT in sub-selects

* Allow DELETE and UPDATE to use inheritance using tablename*

* Create a background process for each database that runs while

database is idle, finding superceeded rows, gathering stats and vacuuming

* Add UNIQUE capability to non-btree indexes

* -Certain indexes will not shrink, i.e. oid indexes with many inserts

* -Certain indexes will not shrink, i.e. oid indexes with many inserts(Vadim)

* Restore unused oid's on backend exit if no one else has gotten oids

* Have UPDATE/DELETE clean out indexes

* Allow WHERE restriction on ctid

* 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) [logging]

with after-row images(Vadim) [logging](Vadim)

* 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

FSYNC

* -Allow transaction commits with rollback with no-fsync performance [fsync]

* -Prevent fsync in SELECT-only queries

* -Allow transaction commits with rollback with no-fsync performance [fsync](Vadim)

* -Prevent fsync in SELECT-only queries(Vadim)

INDEXES

* Use indexes in ORDER BY for restrictive data sets, min(), max()

* Pull requested data directly from indexes, bypassing heap data

* Use index to restrict rows returned by multi-key index when used with

non-consecutive keys or OR clauses, so fewer heap accesses

* -Convert function(constant) into a constant for index use

* -Convert function(constant) into a constant for index use(Tom)

* Allow LIMIT ability on single-table queries that have no ORDER BY to use

a matching index [limit]

* Improve LIMIT processing by using index to limit rows processed [limit]

* Improve _bt_binsrch() to handle equal keys better, remove _bt_firsteq()(Tom)

* Allow SELECT * FROM tab WHERE int2col = 4 use int2col index, int8,

float4, numeric/decimal too [optimizer]

* -Allow optimizer to prefer plans that match ORDER BY

* -Allow optimizer to prefer plans that match ORDER BY(Tom)

CACHE

* Allow compression of log and meta data

* 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 [cnfify]

* -Fix memory exhaustion when using many OR's [cnfify](Tom)

* Get faster regex() code from Henry Spencer <henry@zoo.utoronto.ca>

when it is available

* Use mmap() rather than SYSV shared memory(?)

* -Process const = const parts of OR clause in separate pass

* -Process const = const parts of OR clause in separate pass(Tom)

* Make oid use oidin/oidout not int4in/int4out in pg_type.h

* Improve Subplan list handling

* Allow Subplans to use efficient joins(hash, merge) with upper variable