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Postgres FD Implementation
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Abuhujair Javed
Postgres FD Implementation
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06385ccb
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06385ccb
authored
Jun 07, 1999
by
Bruce Momjian
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doc/TODO
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06385ccb
TODO list for PostgreSQL
TODO list for PostgreSQL
========================
========================
Last updated:
Fri Jun 4 23:16:01
EDT 1999
Last updated:
Sun Jun 6 22:08:59
EDT 1999
Current maintainer: Bruce Momjian (maillist@candle.pha.pa.us)
Current maintainer: Bruce Momjian (maillist@candle.pha.pa.us)
...
@@ -19,6 +19,7 @@ Developers who have claimed items are:
...
@@ -19,6 +19,7 @@ Developers who have claimed items are:
* David is David Hartwig <daveh@insightdist.com>
* David is David Hartwig <daveh@insightdist.com>
* Edmund is Edmund Mergl <E.Mergl@bawue.de>
* Edmund is Edmund Mergl <E.Mergl@bawue.de>
* Goran is Goran Thyni <goran@kyla.kiruna.se>
* Goran is Goran Thyni <goran@kyla.kiruna.se>
* Hiroshi is Hiroshi Inoue<Inoue@tpf.co.jp>
* Jan is Jan Wieck <wieck@sapserv.debis.de>
* Jan is Jan Wieck <wieck@sapserv.debis.de>
* Marc is Marc Fournier <scrappy@hub.org>
* Marc is Marc Fournier <scrappy@hub.org>
* Massimo Dal Zotto <dz@cs.unitn.it>
* Massimo Dal Zotto <dz@cs.unitn.it>
...
@@ -33,6 +34,7 @@ Developers who have claimed items are:
...
@@ -33,6 +34,7 @@ Developers who have claimed items are:
* Vadim is "Vadim B. Mikheev" <vadim@krs.ru>
* Vadim is "Vadim B. Mikheev" <vadim@krs.ru>
RELIABILITY
RELIABILITY
-----------
-----------
* Overhaul mdmgr/smgr to fix double unlinking and double opens, cleanup
* Overhaul mdmgr/smgr to fix double unlinking and double opens, cleanup
...
@@ -40,130 +42,152 @@ RELIABILITY
...
@@ -40,130 +42,152 @@ RELIABILITY
* Remove EXTEND?
* Remove EXTEND?
* Tables that start with xinv confused to be large objects
* Tables that start with xinv confused to be large objects
* Two and three dimensional arrays display improperly, missing {}
* Two and three dimensional arrays display improperly, missing {}
* S
ELECT
a[1] FROM test fails, it needs test.a[1]
* S
elect
a[1] FROM test fails, it needs test.a[1]
* U
PDATE
table SET table.value = 3 fails
* U
pdate
table SET table.value = 3 fails
* User who can create databases can modify pg_database table
* User who can create databases can modify pg_database table
* elog() does not free all its memory(Jan)
* Elog() does not free all its memory(Jan)
* views on subselects fail
* Disallow inherited columns with the same name as new columns
* disallow inherited columns with the same name as new columns
* Recover or force failure when disk space is exhausted
* recover or force failure when disk space is exhausted
* Views containing aggregates sometimes fail(Jan)
* views containing aggregates sometimes fail(Jan)
* Alter TABLE ADD COLUMN does not honor DEFAULT, add CONSTRAINT
* ALTER TABLE ADD COLUMN does not honor DEFAULT, add CONSTRAINT
* Array index references without table name cause problems
* array index references without table name cause problems
* Views with spaces in view name fail when referenced
* views with spaces in view name fail when referenced
* Plpgsql does not handle quoted mixed-case identifiers
* plpgsql does not handle quoted mixed-case identifiers
* Do not allow bpchar column creation without length
* do not allow bpchar column creation without length
* INSERT INTO ... SELECT with AS columns matching result columns problem
* INSERT INTO ... SELECT with AS columns matching result columns problem
ENHANCEMENTS
ENHANCEMENTS
------------
------------
* Transaction log, so re-do log can be on a separate disk
* Add referential integrity
* Allow transaction commits with rollback with no-fsync performance
* Add OUTER joins, left and right(Thomas)
* Allow long tuples by chaining or auto-storing outside db (chaining,large objs)
* Fix memory leak for expressions?, aggregates?
Exotic features:
* Add sql3 recursive unions
* Add the concept of dataspaces
* Add replication of distributed databases
* Allow queries across multiple databases
Admin:
* Better interface for adding to pg_group
* More access control over who can create tables and access the database
* More access control over who can create tables and access the database
* Add full ANSI SQL capabilities
* Add syslog functionality
* add OUTER joins, left and right(Thomas)
* Allow elog() to return error codes, not just messages
* add sql3 recursive unions
* Allow international error message support and add error codes
* add the concept of dataspaces
* Generate postmaster pid file and remove flock/fcntl lock code
* add BIT, BIT VARYING
* Add ability to specifiy location of lock/socket files
* NCHAR (as distinguished from ordinary varchar),
* DOMAIN capability
Types:
* Add BIT, BIT VARYING
* 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
* Allow compression of large fields or a compressed field type
* Large objects
* Large objects
* Fix large object mapping scheme, own typeid or reltype(Peter)
* Fix large object mapping scheme, own typeid or reltype(Peter)
* Allow large text type to use large objects(Peter)
* Allow large text type to use large objects(Peter)
* not to stuff everything as files in a single directory
* Not to stuff everything as files in a single directory
* Better interface for adding to pg_group
* Allow pg_descriptions when creating types, tables, columns, and functions
* allow row re-use without vacuum, maybe?(Vadim)
* Add IPv6 capability to INET/CIDR types
* Populate backend status area and write program to dump status data
* Make a separate SERIAL type?
* Add ALTER TABLE DROP/ALTER COLUMN feature
* Store binary-compatible type information in the system
* Add syslog functionality
* Allow user to define char1 column
* Add STDDEV/VARIANCE() function for standard deviation computation/variance
* Add support for & operator
* add UNIQUE capability to non-btree indexes
* certain indexes will not shrink, i.e. oid indexes with many inserts
Views:
* make NULL's come out at the beginning or end depending on the ORDER BY direction
* 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 pg_descriptions when creating types, tables, columns, and functions
* Allow psql to print nulls as distinct from ""(?)
* Allow cursors to be DECLAREd/OPENed/CLOSEed outside transactions
* Allow DISTINCT on views
* Allow DISTINCT on views
* Allow views of aggregate columns
* Allow views of aggregate columns
* Allow flag to control COPY input/output of NULLs
* Allow views with subselects
* Allow CLUSTER on all tables at once, and improve CLUSTER
* Allow elog() to return error codes, not just messages
* allow international error message support and add error codes
* Allow subqueries in target list
* Allow subqueries in target list
* Allow queries across multiple databases
* Put sort files, large objects in their on directory
* Add replication of distributed databases
* Do autocommit so always in a transaction block
* Show location of syntax error in query
* Redesign the function call interface to handle NULLs better(Jan)
* Document/trigger/rule so changes to pg_shadow create pg_pwd
* Missing optimizer selectivities for date, etc.
Indexes:
* 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?
* Allow SQL function indexes
* Add FILLFACTOR to index creation
Commands:
* ALTER TABLE ADD COLUMN to inherited table put column in wrong place
* Add ALTER TABLE DROP/ALTER COLUMN feature
* Allow CLUSTER on all tables at once, and improve CLUSTER
* Generate error on CREATE OPERATOR of ~~, ~ and and ~*
* Generate error on CREATE OPERATOR of ~~, ~ and and ~*
* allow psql \copy to allow delimiters
* Add SIMILAR TO to allow character classes, 'pg_[a-c]%'
* add a function to return the last inserted oid, for use in psql scripts
* Auto-destroy sequence on DROP of table with SERIAL
* allow creation of functional indexes to use default types
* Allow LOCK TABLE tab1, tab2, tab3 so all tables locked in unison
* put sort files, large objects in their on directory
* Allow INSERT/UPDATE of system-generated oid value for a row
* do autocommit so always in a transaction block
* add SIMILAR TO to allow character classes, 'pg_[a-c]%'
* improve reporting of syntax errors by showing location of error in query
* allow chaining of pages to allow >8k tuples, auto-large object use
* redesign the function call interface to handle NULLs better(Jan)
* permissions on indexes - prevent them?
* document/trigger/rule so changes to pg_shadow create pg_pwd
* generate postmaster pid file and remove flock/fcntl lock code
* add ability to specifiy location of lock/socket files
* auto-destroy sequence on DROP of table with SERIAL
* make a separate serial type?
* allow user to define char1 column
* allow LOCK TABLE tab1, tab2, tab3 so all tables locked in unison
* allow INSERT/UPDATE of system-generated oid value for a row
* missing optimizer selectivities for date, etc.
* Add support for & operator
* store binary-compatible type information in the system
* Allow ESCAPE '\' at the end of LIKE for ANSI compliance
* Allow ESCAPE '\' at the end of LIKE for ANSI compliance
*
r
ewrite the LIKE handling by rewriting the user string with the
*
R
ewrite the LIKE handling by rewriting the user string with the
supplied ESCAPE
supplied ESCAPE
* Fix memory leak for expressions?, aggregates?
* Move LIKE index optimization handling to the optimizer
* Allow Subplans to use efficient joins(hash, merge) with upper variable
Clients:
* Make NULL's come out at the beginning or end depending on the
ORDER BY direction
* Allow flag to control COPY input/output of NULLs
* Update reltuples from COPY command
* Update reltuples from COPY command
* Allow CREATE INDEX zman_index ON test (date_trunc( 'day', zman ) datetime_ops)
* Allow psql \copy to allow delimiters
fails index can't store constant parameters
* Add a function to return the last inserted oid, for use in psql scripts
* allow SQL function indexes
* Allow psql to print nulls as distinct from ""(?)
* ALTER TABLE ADD COLUMN to inherited table put column in wrong place
* Add IPv6 capability to INET/CIDR types
* Allow PQrequestCancel() to terminate when in waiting-for-lock state
* Increase identifier length(NAMEDATALEN) if small performance hit
* Increase identifier length(NAMEDATALEN) if small performance hit
* Fix for long table/column name auto-sequence serial name
* Allow row re-use without vacuum, maybe?(Vadim)
* Add UNIQUE capability to non-btree indexes
* Certain indexes will not shrink, i.e. oid indexes with many inserts
* 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
* Populate backend status area and write program to dump status data
* Make oid use unsigned int more reliably, pg_atoi()
* Add PL/Perl(Mark Hollomon)
PERFORMANCE
PERFORMANCE
-----------
-----------
* Allow transaction commits with rollback with no-fsync performance
* Prevent fsync in SELECT-only queries
* Use indexes in ORDER BY for restrictive data sets, min(), max()
* 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
* Use index with constants on functions
* Allow LIMIT ability on single-table queries that have no ORDER BY to use
* Allow LIMIT ability on single-table queries that have no ORDER BY to use
a matching index
a matching index
*
Pull requested data directly from indexes, bypassing heap data
*
Improve LIMIT processing by using index to limit rows processed
* Prevent fsync in SELECT-only queries
* Cache most recent query plan(s?)
* Cache most recent query plan(s?)
* Shared catalog cache, reduce lseek()'s by caching table size in shared area
* Shared catalog cache, reduce lseek()'s by caching table size in shared area
* Allow compression of log and meta data
* Allow compression of log and meta data
* Add FILLFACTOR to index creation
* Update pg_statistic table to remove operator column
* update pg_statistic table to remove operator column
* Make index creation use psort code, because it is now faster(Vadim)
* make index creation use psort code, because it is now faster(Vadim)
* Allow char() not to use variable-sized header to reduce disk size
* Allow char() not to use variable-sized header to reduce disk size
* Do async I/O to do better read-ahead of data
* Do async I/O to do better read-ahead of data
* Fix memory exhaustion when using many OR's
* Fix memory exhaustion when using many OR's
* Get faster regex() code from Henry Spencer <henry@zoo.utoronto.ca>
* Get faster regex() code from Henry Spencer <henry@zoo.utoronto.ca>
when it is available
when it is available
* use mmap() rather than SYSV shared memory(?)
* Use mmap() rather than SYSV shared memory(?)
* use index to restrict rows returned by multi-key index when used with
* Process const = const parts of OR clause in separate pass
non-consecutive keys or OR clauses, so fewer heap accesses
* Make oid use oidin/oidout not int4in/int4out in pg_type.h
* use index with constants on functions
* Create more system table indexes for faster cache lookups
* process const = const parts of OR clause in separate pass
* make oid use oidin/oidout not int4in/int4out in pg_type.h
* make oid use unsigned int more reliably, pg_atoi()
* create more system table indexes for faster cache lookups
* Move LIKE index optimization handling to the optimizer
* Improve LIMIT processing by using index to limit rows processed
* Improve Subplan list handling
* Improve Subplan list handling
* Allow Subplans to use efficient joins(hash, merge) with upper variable
DOCUMENTATION
DOCUMENTATION
...
...
doc/src/sgml/release.sgml
View file @
06385ccb
...
@@ -282,6 +282,7 @@ Fix for aggregates on array indexes(Tom)
...
@@ -282,6 +282,7 @@ Fix for aggregates on array indexes(Tom)
Fix for DEFAULT handles single quotes in value requiring too many quotes
Fix for DEFAULT handles single quotes in value requiring too many quotes
Fix security problem with non-super users importing/exporting large objects(Tom)
Fix security problem with non-super users importing/exporting large objects(Tom)
Rollback of transaction that creates table cleaned up properly(Tom)
Rollback of transaction that creates table cleaned up properly(Tom)
Fix to allow long table and column names to generate proper serial names(Tom)
Enhancements
Enhancements
------------
------------
...
...
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