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Update TODO list.
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Bruce Momjian
parent
a871e36944
commit
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269
doc/TODO
269
doc/TODO
@ -1,6 +1,6 @@
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TODO list for PostgreSQL
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========================
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Last updated: Thu May 10 13:29:36 EDT 2001
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Last updated: Thu May 10 16:26:24 EDT 2001
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Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
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@ -57,13 +57,13 @@ ADMIN
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* Remove unused files during database vacuum or postmaster startup
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* Add table name mapping for numeric file names
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* Overhaul pg_hba.conf host-based authentication
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* Incremental backups
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TYPES
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* Add domain capability
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* Add IPv6 capability to INET/CIDR types
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* Add conversion function from text to inet
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* Make a separate SERIAL type?
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* Store binary-compatible type information in the system
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* Allow nulls in arrays
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* Allow arrays to be ORDER'ed
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@ -107,125 +107,11 @@ INDEXES
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[inheritance]
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* Prevent pg_attribute from having duplicate oids for indexes (Tom)
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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 (Vadim)
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* Certain indexes will not shrink, e.g. oid indexes with many inserts (Vadim)
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* Have UPDATE/DELETE clean out indexes
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* Add btree index support for reltime, tinterval, regproc
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* Add rtree index support for line, lseg, path, point
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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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[inheritance]
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* Add ALTER TABLE DROP COLUMN feature [drop]
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* Add ALTER FUNCTION
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* Add ALTER TABLE ... DROP CONSTRAINT
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* Automatically drop constraints/functions when object is dropped
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* CLUSTER
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* cluster all tables at once
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* prevent lose of indexes, permissions, inheritance
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* Automatically keep clustering on a table
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* Keep statistics about clustering, perhaps during VACUUM ANALYZE
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[optimizer]
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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 [lock]
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* Allow INSERT/UPDATE of system-generated oid value for a row
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* Allow INSERT INTO my_table VALUES (a, b, c, DEFAULT, x, y, z, ...)
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* Allow INSERT INTO tab (col1, ..) VALUES (val1, ..), (val2, ..)
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* Allow RULE recompilation
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* Allow BINARY option to SELECT, like we do with DECLARE
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* MOVE 0 should not move to end of cursor
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* Add SHOW command to display locks
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* Bring INSERT ... VALUES up to full SQL92 spec, disallow missing
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columns, allow DEFAULT
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* Allow cursors to be DECLAREd/OPENed/CLOSEed outside transactions
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* Allow DELETE WHERE CURRENT OF cursor
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* Add BETWEEN ASYMMETRIC/SYMMETRIC
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* Add SET or BEGIN timeout parameter to cancel query if waiting too long
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* Change LIMIT val,val to offset,limit to match MySQL
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* Allow Pl/PgSQL's RAISE function to take expressions
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CLIENTS
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* Make NULL's come out at the beginning or end depending on the
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ORDER BY direction
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* COPY
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* Update reltuples in COPY
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* Allow specification of column names
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* Allow dump/load of CSV format
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* fix array handling for ECPG
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* have pg_dump use LEFT OUTER JOIN in multi-table SELECTs
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or multiple SELECTS to avoid bad system catalog entries
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* allow psql \d to show primary and foreign keys
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* allow psql \d to show temporary table structure
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* add XML interface capability
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* Add a global RESET command for use with connection pooling
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* Remove <=6.3 version compatibility in ODBC?
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* Add SET REAL_FORMAT and SET DOUBLE_PRECISION_FORMAT using printf args
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REFERENTIAL INTEGRITY
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* Add MATCH PARTIAL referential integrity
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* Check that primary key exists at foreign key definition time
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* Prevent column dropping if column is used by foreign key
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* Propagate column or table renaming to foreign key constraints
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* Add deferred trigger queue file (Jan)
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* Allow oid to act as a foreign key
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* Implement dirty reads and use them in RI triggers
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* Enforce referential integrity for system tables
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* INSERT & UPDATE/DELETE in transaction of primary key fails with
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deferredTriggerGetPreviousEvent or "change violation" [foreign]
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* Add unique indexes to pg_shadow.usename and pg_shadow.usesysid or
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switch to pg_shadow.oid as user id
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* Add unique indexes on pg_database
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* Check all system tables and add unique indexes as needed
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* Make constraints clearer in dump file
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* Change foreign key constraint for array -> element to mean element
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in array
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EXOTIC FEATURES
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* Add sql3 recursive unions
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* Add the concept of dataspaces/tablespaces [tablespaces]
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* Allow queries across multiple databases
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* Allow nested transactions (Vadim)
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* Allow INSERT/UPDATE ... RETURNING new.col or old.col (Philip)
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* Add pre-parsing phase that convets non-ANSI features to supported features
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* SQL*Net listener that makes PostgreSQL appear as an Oracle database
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to clients
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* Incremental backups
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* Allow SQL92 schemas
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* Handle transaction rollover [transactions]
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MISCELLANEOUS
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* Increase identifier length(NAMEDATALEN) if small performance hit
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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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* Implement UNDO using transaction log
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* Populate backend status area and write program to dump status data
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* Put sort files in their own directory
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* Allow autocommit so always in a transaction block
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* Show location of syntax error in query [yacc]
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* Overhaul bufmgr/lockmgr/transaction manager
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* Encrpyt passwords in pg_shadow table using MD5 (Vince)
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* Allow Java server-side programming [java]
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* Add sed-like regular expression search/replace capability
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* Change representation of whole-tuple parameters to functions
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PERFORMANCE
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-----------
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-FSYNC
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* Delay fsync() when other backends are about to commit too [fsync]
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* Determine optimal commit_delay value
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* Determine optimal fdatasync/fsync, O_SYNC/O_DSYNC options
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* Allow multiple blocks to be written to WAL with one write()
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INDEXES
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* Use indexes to find min() and max()
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* Use indexes for min() and max()
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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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* Allow SELECT * FROM tab WHERE int2col = 4 use int2col index, int8,
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@ -235,7 +121,130 @@ INDEXES
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* Be smarter about insertion of already-ordered data into btree index
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* Gather more accurate dispersion statistics using indexes
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* Add deleted bit to index tuples to reduce heap access
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* Prevent index uniqueness checks when UPDATE does not modify column
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* Prevent index uniqueness checks when UPDATE does not modifying column
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* System Tables
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* Add unique indexes to pg_shadow.usename and pg_shadow.usesysid or
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switch to pg_shadow.oid as user id
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* Add unique indexes on pg_database
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* Check all system tables and add unique indexes as needed
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* Remove pg_listener index
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* Remove unused pg_variable, pg_inheritproc, pg_ipl tables
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COMMANDS
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* ALTER
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* ALTER TABLE ADD COLUMN to inherited table put column in wrong place
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[inheritance]
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* Add ALTER TABLE DROP COLUMN feature [drop]
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* Add ALTER FUNCTION
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* Add ALTER TABLE DROP CONSTRAINT
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* CLUSTER
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* cluster all tables at once
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* prevent lose of indexes, permissions, inheritance
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* Automatically keep clustering on a table
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* Keep statistics about clustering, perhaps during VACUUM ANALYZE
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[optimizer]
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* COPY
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* Update reltuples in COPY
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* Allow specification of column names
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* Allow dump/load of CSV format
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* CURSOR
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* Allow BINARY option to SELECT, like we do with DECLARE
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* MOVE 0 should not move to end of cursor
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* Allow cursors to be DECLAREd/OPENed/CLOSEed outside transactions
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* Allow DELETE WHERE CURRENT OF cursor
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* INSERT
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* Allow INSERT/UPDATE of system-generated oid value for a row
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* Allow INSERT INTO tab (col1, ..) VALUES (val1, ..), (val2, ..)
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* Allow INSERT INTO my_table VALUES (a, b, c, DEFAULT, x, y, z, ...)
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* Disallow missing columns in INSERT ... VALUES, per ANSI
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* Allow INSERT/UPDATE ... RETURNING new.col or old.col (Philip)
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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, perhaps with a separate
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SERIAL type
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* Allow LOCK TABLE tab1, tab2, tab3 so all tables locked in unison [lock]
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* Allow RULE recompilation
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* Add BETWEEN ASYMMETRIC/SYMMETRIC
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* SHOW/SET
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* Add SHOW command to display locks
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* Add a global RESET command for use with connection pooling
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* Add SET or BEGIN timeout parameter to cancel query if waiting too long
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* Add SET REAL_FORMAT and SET DOUBLE_PRECISION_FORMAT using printf args
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* Remove SET KSQO option now that OR processing is improved (Tom)
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* Add SET PERFORMANCE_TIPS option to suggest INDEX, VACUUM, VACUUM
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ANALYZE, and CLUSTER
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* Change LIMIT val,val to offset,limit to match MySQL
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* Allow Pl/PgSQL's RAISE function to take expressions
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CLIENTS
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* Make NULL's come out at the beginning or end depending on the
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ORDER BY direction
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* fix array handling in ECPG
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* have pg_dump use LEFT OUTER JOIN in multi-table SELECTs
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or multiple SELECTS to avoid bad system catalog entries
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* allow psql \d to show primary and foreign keys
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* allow psql \d to show temporary table structure
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* add XML interface capability
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* Remove <=6.3 version compatibility in ODBC?
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REFERENTIAL INTEGRITY
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* Add MATCH PARTIAL referential integrity
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* -Check that primary key exists at foreign key definition time
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* Prevent column dropping if column is used by foreign key
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* Propagate column or table renaming to foreign key constraints
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* Add deferred trigger queue file (Jan)
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* Allow oid to act as a foreign key
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* Implement dirty reads and use them in RI triggers
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* Enforce referential integrity for system tables
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* INSERT & UPDATE/DELETE in transaction of primary key fails with
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deferredTriggerGetPreviousEvent or "change violation" [foreign]
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* Make constraints clearer in dump file
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* Change foreign key constraint for array -> element to mean element
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in array
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* Automatically drop constraints/functions when object is dropped
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TRANSACTIONS
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* Implement UNDO using transaction log
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* Allow autocommit so always in a transaction block
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* Overhaul bufmgr/lockmgr/transaction manager
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* Allow nested transactions (Vadim)
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* Handle transaction rollover [transactions]
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EXOTIC FEATURES
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* Add sql3 recursive unions
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* Add the concept of dataspaces/tablespaces [tablespaces]
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* Allow SQL92 schemas
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* Allow queries across multiple databases
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* Add pre-parsing phase that converts non-ANSI features to supported features
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* SQL*Net listener that makes PostgreSQL appear as an Oracle database
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to clients
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MISCELLANEOUS
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* Increase identifier length(NAMEDATALEN) if small performance hit
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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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* Populate backend status area and write program to dump status data
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* Put sort files in their own directory
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* Show location of syntax error in query [yacc]
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* Encrpyt passwords in pg_shadow table using MD5 (Vince)
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* Allow Java server-side programming [java]
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* Add sed-like regular expression search/replace capability
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* Change representation of whole-tuple parameters to functions
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PERFORMANCE
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-----------
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FSYNC
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* Delay fsync() when other backends are about to commit too [fsync]
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* Determine optimal commit_delay value
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* Determine optimal fdatasync/fsync, O_SYNC/O_DSYNC options
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* Allow multiple blocks to be written to WAL with one write()
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CACHE
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@ -247,14 +256,15 @@ VACUUM
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* Improve speed with indexes (perhaps recreate index instead) [vacuum]
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* Reduce lock time by moving tuples with read lock, then write
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lock and truncate table [vacuum]
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* Make ANALYZE a separate command
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* Allow ANALYZE to ESTIMATE based on certain random precentage of rows
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* -Make ANALYZE a separate command
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* -Allow ANALYZE to ESTIMATE based on certain random precentage of rows
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* Add LAZY VACUUM (Vadim)
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MISCELLANEOUS
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* Allow compression of log and meta data
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* Do async I/O to do better read-ahead of data
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* Experiment with multi-threaded backend [thread]
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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(?) [mmap]
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@ -263,15 +273,11 @@ MISCELLANEOUS
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* improve dynamic memory allocation by introducing tuple-context memory
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allocation (Tom)
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* allow configuration of maximum number of open files
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* Remove pg_listener index
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* Improve statistics storage in pg_class [performance]
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* -Improve statistics storage in pg_class [performance]
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* Add connection pooling [pool]
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* Allow persistent backends [persistent]
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* Create a transaction processor to aid in persistent connections and
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connection pooling
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* Add SET PERFORMANCE_TIPS option to suggest INDEX, VACUUM, VACUUM
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ANALYZE, and CLUSTER
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* Force transactions that commit at near the same time use a single fsync()
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* Make blind writes go through the file descriptor cache
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* Allow logging of query durations
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@ -279,10 +285,7 @@ SOURCE CODE
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-----------
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* Add use of 'const' for variables in source tree
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* Does Mariposa source contain any other bug fixes?
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* Remove SET KSQO option now that OR processing is improved (Tom)
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* Convert remaining fprintf(stderr,...)/perror() to elog()
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* Remove unused pg_variable, pg_inheritproc, pg_ipl tables
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* Experiment with multi-threaded backend [thread]
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* Fix problems with libpq non-blocking/async code [async]
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* Merge global and template BKI files (Peter E)
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* Fix username/password length limits in all areas
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@ -293,12 +296,12 @@ SOURCE CODE
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* Add version file format stamp to heap and other table types
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* Make elog(LOG) in WAL its own output type, distinct from DEBUG
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* Rename some /contrib modules from pg* to pg_*
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* Remove warnings created by -Wcast-align
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* Move platform-specific ps status display info from ps_status.c to ports
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* Decide on spelling of indexes/indices
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* Allow ps status display to work on Solaris/SVr4-based systems
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* Move some things from /contrib into main tree, like soundex
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* Allow plug-in modules to emulate features from other databases
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* Remove warnings created by -Wcast-align
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* Move platform-specific ps status display info from ps_status.c to ports
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* Allow ps status display to work on Solaris/SVr4-based systems
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* Decide on spelling of indexes/indices
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* Add mention of VACUUM, log rotation to Administrator's Guide
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* Add PL/Python documentation
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