TODO list for PostgreSQL
========================
-Last updated: Sat Apr 14 21:55:58 EDT 2001
+Last updated: Sun Apr 15 21:32:39 EDT 2001
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
The most recent version of this document can be viewed at
the PostgreSQL web site, http://www.PostgreSQL.org.
-A dash (-) marks changes that will appear in the upcoming 7.1 release.
+A dash (-) marks changes that will appear in the upcoming 7.2 release.
Bracketed items "[]" have more detailed information at
http://www.postgresql.org/docs/todo.html.
* 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
* Unique index on base column not honored on inserts from inherited table
INSERT INTO inherit_table (unique_index_col) VALUES (dup) should fail
[inheritance]
-* -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 (Tom)
-* -SELECT col::DECIMAL(12,10); fails
-
-VIEWS
-
-* -Views containing aggregates sometimes fail (Jan)
-* -Creating view and inheriting the view causes view* to show
- duplicates [inheritance]
-* -Disallow LOCK on view (Mark Hollomon)
MISC
* Plpgsql does not handle quoted mixed-case identifiers
-* -Buffer reference counting bugfixes (Tom)
-* -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
- promotion occurs
-* -Modification of pg_class can happen while table in use by
- another backend. Might lead to MVCC inside of syscache
* Permission to DELETE table allows UPDATE also
* SELECT cash_out(1) causes crash
URGENT
-* -Add OUTER joins, left and right (Tom, Thomas)
-* -Allow long tuples by chaining or auto-storing outside db (TOAST) (Jan)
-* -Fix memory leak for expressions (Tom)
* Add replication of distributed databases [replication]
o automatic fallover
o load balancing
ADMIN
* More access control over who can create tables and use locks (Karel)
-* -Test syslog functionality
* Allow elog() to return error codes, module name, file name, line
number, not just messages [elog]
* Allow international error message support and add error codes [elog]
-* -Unify configuration into one configuration file (Peter E)
-* -use setproctitle() if it exists for 'ps' display of status
-* -Prevent initdb from running wrong version of postmaster/postgres (Peter E)
* Remove unused files during database vacuum or postmaster startup
TYPES
* 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 E)
- 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
* Add conversion function from text to inet
* Make a separate SERIAL type?
* Store binary-compatible type information in the system
-* -Add support for & operator (Peter E)
* Allow LOCALE on a per-column basis, default to ASCII
* Add SHOW command to see locale
* Allow nulls in arrays
* Declare typein/out functions in pg_proc with a special "C string" data type
* Add non-large-object binary field
* Functions returning sets do not totally work
-* -Add hash for int8 (Tom)
* SELECT col FROM tab WHERE numeric_col = 10.1 fails
-* -Get BIT type working
* Allow better handling of numeric constants, type conversion [typeconv]
* Support multiple simultaneous character sets, per SQL92
* Reject character sequences those are not valid in their charset
* Make functions more multi-byte aware, i.e. trim()
* Make n of CHAR(n)/VARCHAR(n) the number of letters, not bytes
-* -Update macaddr manufacturer numbers, or remove the function macaddr_manuf()
* Add btree index support for reltime, tinterval, regproc
* Add rtree index support for line, lseg, path, point
* Make binary/file in/out interface for TOAST columns
VIEWS
-* -Allow DISTINCT on views
-* -Allow views of aggregate columns
-* -Allow views with subselects
* Automatically create rules on views so they are updateable, per SQL92
-* -Change elog for complex view ins|upd|del to "cannot {ins|upd|del}
* Add the functionality for "with check option" clause of create view
* Allow NOTIFY in rules involving conditionals
* Evaluate INSERT rules at end of query, rather than beginning
* Allow CREATE INDEX zman_index ON test (date_trunc( 'day', zman ) datetime_ops)
fails index can't store constant parameters
-* -Allow SQL function indexes
* Add FILLFACTOR to index creation
* Re-enable partial indexes
* Allow inherited tables to inherit index, UNIQUE constraint, and primary key
* ALTER TABLE ADD COLUMN to inherited table put column in wrong place
[inheritance]
-* -Add ALTER TABLE ALTER COLUMN feature (Peter E)
* Add ALTER TABLE DROP COLUMN feature [drop]
-* -Add ALTER TABLE command to change table ownership (Mark H)
* Add ALTER FUNCTION
* Add ALTER TABLE ... DROP CONSTRAINT
-* -Add ALTER USER command to change user db attributes (Peter E)
* Automatically drop constraints/functions when object is dropped
* CLUSTER
* cluster all tables at once
* Allow INSERT/UPDATE of system-generated oid value for a row
* Allow INSERT INTO my_table VALUES (a, b, c, DEFAULT, x, y, z, ...)
* Allow INSERT INTO tab (col1, ..) VALUES (val1, ..), (val2, ..)
-* -Allow multi-level query trees for INSERT INTO ... SELECT
-* -Allow ORDER BY...LIMIT in INSERT INTO ... SELECT (Tom)
-* -Allow ESCAPE '\' at the end of LIKE for ANSI compliance (Thomas)
-* -Rewrite the LIKE handling by rewriting the user string with the
- supplied ESCAPE
* Allow RULE recompilation
-* -Support UNION/INTERSECT/EXCEPT in sub-selects
-* -Allow DELETE and UPDATE to use inheritance
* Allow BINARY option to SELECT, like we do with DECLARE
* MOVE 0 should not move to end of cursor
* Overhaul ACL (access control) code
columns, allow DEFAULT
* Allow cursors to be DECLAREd/OPENed/CLOSEed outside transactions
* Allow DELETE WHERE CURRENT OF cursor
-* -redesign UNION structures to have separarate target lists
* Add BETWEEN ASYMMETRIC/SYMMETRIC
CLIENTS
* Allow specification of column names
* Allow dump/load of CSV format
* fix array handling for ECPG
-* -add pg_dump option to dump type names as standard ANSI types
* have pg_dump use LEFT OUTER JOIN in multi-table SELECTs
or multiple SELECTS to avoid bad system catalog entries
-* -make pg_dump dump in oid order, so dependencies are resolved (Philip)
* allow psql \d to show primary and foreign keys
* allow psql \d to show temporary table structure
* add XML interface capability
-* -Allow dumping of users/groups separately
* Add a global RESET command for use with connection pooling
* Remove <=6.3 version compatibility in ODBC?
* Add SET REAL_FORMAT and SET DOUBLE_PRECISION_FORMAT using printf args
* Check that primary key exists at foreign key definition time
* Prevent column dropping if column is used by foreign key
* Propagate column or table renaming to foreign key constraints
-* -Emit a warning at foreign key creation time if no UNIQUE index
- exists on referenced primary key attributes
* Add deferred trigger queue file (Jan)
* Allow oid to act as a foreign key
* Implement dirty reads and use them in RI triggers
* Increase identifier length(NAMEDATALEN) if small performance hit
* Create a background process for each database that runs while
database is idle, finding superceeded rows, gathering stats and vacuuming
-* -Transaction log, so re-do log can be on a separate disk with after-row
- images (Vadim)
* Implement UNDO using transaction log
* Populate backend status area and write program to dump status data
* Put sort files in their own directory
* Allow autocommit so always in a transaction block
* Show location of syntax error in query [yacc]
-* -Redesign the function call interface to handle NULLs better (Tom)
* Overhaul bufmgr/lockmgr/transaction manager
-* -Use IPC_EXCL when creating shared memory and semaphores (Tom)
* Encrpyt passwords in pg_shadow table using MD5 (Vince)
-* -Use flock() to prevent multiple postmasters on the same port (Tom)
* Allow Java server-side programming [java]
* Add sed-like regular expression search/replace capability
-FSYNC
-* -Allow transaction commits with rollback with no-fsync performance
- (Vadim)
* Delay fsync() when other backends are about to commit too [fsync]
* Determine optimal commit_delay value
* Determine optimal fdatasync/fsync, O_SYNC/O_DSYNC options
non-consecutive keys or OR clauses, so fewer heap accesses
* Allow SELECT * FROM tab WHERE int2col = 4 use int2col index, int8,
float4, numeric/decimal too [optimizer]
-* -Include heap CTID in btree index keys, remove equal-key cruft from
- btree (Tom)
* Use indexes with CIDR '<<' (contains) operator
* Allow LIKE indexing optimization for non-ASCII locales
* Be smarter about insertion of already-ordered data into btree index
* Improve speed with indexes (perhaps recreate index instead) [vacuum]
* Reduce lock time by moving tuples with read lock, then write
lock and truncate table [vacuum]
-* -Redesign ANALYZE in VACUUM so it can be run separately without locks
* Make ANALYZE a separate command
* Allow ANALYZE to ESTIMATE based on certain random precentage of rows
* Add LAZY VACUUM (Vadim)
* Get faster regex() code from Henry Spencer <henry@zoo.utoronto.ca>
when it is available
* Use mmap() rather than SYSV shared memory(?) [mmap]
-* -Make oid use oidin/oidout not int4in/int4out in pg_type.h (Tom)
* Improve Subplan list handling
* Allow Subplans to use efficient joins(hash, merge) with upper variable
-* -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 (Tom)
-* -In WHERE tab1.x=3 AND tab1.x=tab2.y, add tab2.y=3
* allow configuration of maximum number of open files
* Remove pg_listener index
* Improve statistics storage in pg_class [performance]
SOURCE CODE
-----------
* Add use of 'const' for variables in source tree
-* -Fix C optimizer problem where fmgr_ptr calls return different types (Tom)
* Does Mariposa source contain any other bug fixes?
* Remove SET KSQO option now that OR processing is improved (Tom)
-* -Use macros to define NT open() file parameters, remove NT-specific defines
-* -Change CURRENT to OLD internally for rules (Bruce)
* Convert remaining fprintf(stderr,...)/perror() to elog()
-* -Allow libedit to be used in place of libreadline
-* -BSD/OS does not support locale because there is no LC_MESSAGES (Bruce)
* Remove unused pg_variable, pg_inheritproc, pg_ipl tables
* Experiment with multi-threaded backend [thread]
* Fix problems with libpq non-blocking/async code [async]
OSDN Git Service
