TODO list for PostgreSQL

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

Last updated:Mon Oct 2318:15:18 EDT 2000

Last updated:Mon Oct 2321:59:07 EDT 2000

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

* SELECT pg_class FROM pg_class generates strange error

* Alter TABLE ADD COLUMN does not honor DEFAULT, add CONSTRAINT

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

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

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

* Unique index on base column not honored on inserts from inherited table

INSERT INTO inherit_table (unique_index_col) VALUES (dup) should fail

[inherit]

* Be smarter about promoting types when UNION merges different data types

* redesign INSERT ... SELECT to have two levels of target list

*-Be smarter about promoting types when UNION merges different data types

*-redesign INSERT ... SELECT to have two levels of target list

* have INTERSECT/EXCEPT prevent duplicates unless ALL is specified

* SELECT col::DECIMAL(12,10); fails

VIEWS

* Views containing aggregates sometimes fail(Jan)

*-Views containing aggregates sometimes fail(Jan)

* Creating view and inheriting the view causes view* to show

duplicates(inherit)

* -Disallow LOCK on view(Mark Hollomon)

* Buffer reference counting bugfixes

* Fix libpq bug that causes it to drop backend error message sent

just before connection closure (ie, any FATAL error message)

* SELECT ... UNION ... ORDER BY fails when sort expr not in result list

* SELECT ... UNION ... GROUP BY fails if column types disagree, no type

*-SELECT ... UNION ... ORDER BY fails when sort expr not in result list

*-SELECT ... UNION ... GROUP BY fails if column types disagree, no type

promotion occurs

* Modification of pg_class can happen while table in use by

another backend. Might lead to MVCC inside of syscache

URGENT

* -Add OUTER joins, left and right[outer](Tom, Thomas)

* Allow long tuples by chaining or auto-storing outside db (TOAST)(Jan)

*-Allow long tuples by chaining or auto-storing outside db (TOAST)(Jan)

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

ADMIN

* Nchar (as distinguished from ordinary varchar),

* Domain capability

* -Add STDDEV/VARIANCE() function for standard deviation computation/variance

* Allow compression of large fields or a compressed field type

* Large objects

o Fix large object mapping scheme, own typeid or reltype(Peter)

o Not to stuff everything as files in a single directory, hash dirs

o Allow large object vacuuming

o Tables that start with xinv confused to be large objects

*-Allow compression of large fields or a compressed field type

*-Large objects

o-Fix large object mapping scheme, own typeid or reltype(Peter)

o-Not to stuff everything as files in a single directory, hash dirs

o-Allow large object vacuuming

o-Tables that start with xinv confused to be large objects

* Add IPv6 capability to INET/CIDR types

* Fix improper masking of some inet/cidr types [cidr]

* Make a separate SERIAL type?

VIEWS

* Allow DISTINCT on views

* Allow views of aggregate columns

* Allow views with subselects

*-Allow DISTINCT on views

*-Allow views of aggregate columns

*-Allow views with subselects

* Create insert, update and delete rules for simple one table views

* -Change elog for complex view ins|upd|del to "cannot {ins|upd|del}

* Add the functionality for "with check option" clause of create view

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

supplied ESCAPE [like]

* Allow RULE recompilation

* Support UNION/INTERSECT/EXCEPT in sub-selects

*-Support UNION/INTERSECT/EXCEPT in sub-selects

* -Allow DELETE and UPDATE to use inheritance

* Allow INSERT INTO my_table VALUES (a, b, c, DEFAULT, x, y, z, ...)

* Allow BINARY option to SELECT, like we do with DECLARE

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

* Populate backend status area and write program to dump status data

* Make oid use unsigned int more reliably, pg_atoi()

* Put sort files, large objects in their own directory

* Put sort files in their own directory

* Do autocommit so always in a transaction block(?)

* Show location of syntax error in query [yacc]

* Redesign the function call interface to handle NULLs better[function](Tom)

*-Redesign the function call interface to handle NULLs better[function](Tom)

* Missing optimizer selectivities for date, r-tree, etc. [optimizer]

* Overhaul bufmgr/lockmgr/transaction manager

* Allow BLCKSZ <= 64k, not <= 32k

* redesign UNION structures to have separarate target lists

* Allow multi-level query trees for INSERT INTO ... SELECT

*-redesign UNION structures to have separarate target lists

*-Allow multi-level query trees for INSERT INTO ... SELECT

* Use IPC_EXCL when creating shared memory and semaphores

* have pg_upgrade use pg_ctl to stop/start postmaster

* Encrpyt passwords in pg_shadow table using MD5

* Improve Subplan list handling

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

[subquery]

* use fmgr_info()/fmgr_faddr() instead of fmgr() calls in high-traffic

*-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 [memory]

* In WHERE tab1.x=3 AND tab1.x=tab2.y, add tab2.y=3

*-In WHERE tab1.x=3 AND tab1.x=tab2.y, add tab2.y=3

* Allow persistent backends [persistent]

* prevent labels from being output for stored rules (Tom)

* allow configuration of maximum number of open files

* Remove pg_listener index

* Remove ANALYZE from VACUUM so it can be run separately without locks

* -Redesign ANALYZE in VACUUM so it can be run separately without locks

* Make ANALYZE a separate command

* Gather more accurate dispersion statistics using indexes

* Keep statistics about clustering of table rows [optimizer]

* Improve statistics storage in pg_class [performance]