Remove ENHANCEMENTS section, move subsections up.

doc/TODO

 TODO list for PostgreSQL
 ========================
-Last updated:		Fri Feb  1 11:59:54 EST 2002
+Last updated:		Sun Feb  3 14:23:58 EST 2002
 
 Current maintainer:	Bruce Momjian (pgman@candle.pha.pa.us)
 
@@ -12,10 +12,8 @@ A dash (-) marks changes that will appear in the upcoming 7.3 release.
 Bracketed items "[]" have more detailed.
 
 
-ENHANCEMENTS
-------------
-
 URGENT
+------
 
 * Add replication of distributed databases [replication]
 	o automatic failover
@@ -29,7 +27,9 @@ URGENT
 * Point-in-time data recovery using backup and write-ahead log
 * Allow row re-use without vacuum (Tom)
 
+
 REPORTING
+---------
 
 * Allow elog() to return error codes, module name, file name, line
   number, not just messages (Peter E)
@@ -38,7 +38,9 @@ REPORTING
   only if client exists (Bruce)
 * Show location of syntax error in query [yacc]
 
+
 PERMISSIONS
+-----------
 
 * Improve control over user privileges, including table creation and
   lock use [privileges] (Karel, others)
@@ -49,7 +51,9 @@ PERMISSIONS
 * Make single-user local access permissions the default (Peter E)
 * Use thread-safe crypt() in libpq, if available
 
+
 ADMIN
+-----
 
 * Incremental backups
 * Make it easier to create a database owned by someone who can't createdb,
@@ -64,7 +68,9 @@ ADMIN
 * Prevent SIGHUP and 'pg_ctl reload' from changing command line
   specified parameters to postgresql.conf defaults
 
+
 DATA TYPES
+----------
 
 * Add domain capability [domain]
 * Add IPv6 capability to INET/CIDR types
@@ -94,7 +100,9 @@ DATA TYPES
 	  interface (force out-of-line storage and no compression)
 	o Auto-delete large objects when referencing row is deleted
 
+
 MULTI-LANGUAGE SUPPORT
+----------------------
 
 * Add NCHAR (as distinguished from ordinary varchar),
 * Allow LOCALE on a per-column basis, default to ASCII
@@ -105,7 +113,9 @@ MULTI-LANGUAGE SUPPORT
 * Add octet_length_server() and octet_length_client() (Thomas, Tatsuo)
 * Make octet_length_client the same as octet_length() (?)
 
+
 VIEWS / RULES
+-------------
 
 * Automatically create rules on views so they are updateable, per SQL92 [view]
 * Add the functionality for WITH CHECK OPTION clause of CREATE VIEW
@@ -115,7 +125,9 @@ VIEWS / RULES
 * Allow RULE recompilation
 * Remove brackets as multi-statement rule grouping, must use parens
 
+
 INDEXES
+-------
 
 * Allow CREATE INDEX zman_index ON test (date_trunc( 'day', zman ) datetime_ops)
   fails index can't store constant parameters
@@ -146,7 +158,9 @@ INDEXES
 * Improve concurrency in GIST
 * Add FILLFACTOR to index creation
 
+
 COMMANDS
+--------
 
 * Add SIMILAR TO to allow character classes, 'pg_[a-c]%'
 * Add BETWEEN ASYMMETRIC/SYMMETRIC
@@ -219,7 +233,9 @@ COMMANDS
 	o Add plsh server-side shell language (Peter E)
 	o Allow Java server-side programming (?) [java]
 
+
 CLIENTS
+-------
 
 * Have pg_dump use LEFT OUTER JOIN in multi-table SELECTs
   or multiple SELECTS to avoid bad system catalog entries
@@ -254,7 +270,9 @@ CLIENTS
 	o Add SQLSTATE
 	o fix handling of DB attributes that are arrays
 
+
 REFERENTIAL INTEGRITY
+---------------------
 
 * Add MATCH PARTIAL referential integrity [foreign]
 * Add deferred trigger queue file (Jan)
@@ -267,7 +285,9 @@ REFERENTIAL INTEGRITY
   in array
 * Fix foreign key constraints to not error on intermediate db states (Stephan)
 
+
 DEPENDENCY CHECKING
+-------------------
 
 * Add pg_depend table for dependency recording; use sysrelid, oid,
   depend_sysrelid, depend_oid, name
@@ -281,13 +301,17 @@ DEPENDENCY CHECKING
 * Make constraints clearer in dump file
 * Make foreign keys easier to identify
 
+
 TRANSACTIONS
+------------
 
 * Allow autocommit so always in a transaction block
 * Overhaul bufmgr/lockmgr/transaction manager
 * Allow savepoints / nested transactions [transactions]
 
+
 EXOTIC FEATURES
+---------------
 
 * Add sql3 recursive unions
 * Add the concept of dataspaces/tablespaces [tablespaces]
@@ -300,17 +324,20 @@ EXOTIC FEATURES
 
 
 PERFORMANCE
------------
+===========
+
 
 FSYNC
+-----
 
 * Delay fsync() when other backends are about to commit too [fsync]
 	o Determine optimal commit_delay value
 * Determine optimal fdatasync/fsync, O_SYNC/O_DSYNC options
 	o Allow multiple blocks to be written to WAL with one write()
 
-CACHE
 
+CACHE
+-----
 * Cache most recent query plan(s) (Karel) [prepare]
 * Shared catalog cache, reduce lseek()'s by caching table size in shared area
 * Add free-behind capability for large sequential scans (Bruce)
@@ -318,14 +345,18 @@ CACHE
 * Consider use of open/fcntl(O_DIRECT) to minimize OS caching
 * Make blind writes go through the file descriptor cache
 
+
 VACUUM
+------
 
 * 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]
 * Add LAZY VACUUM (Vadim) [performance]
 
+
 LOCKING
+-------
 
 * Make locking of shared data structures more fine-grained
 * Add code to detect an SMP machine and handle spinlocks accordingly
@@ -333,7 +364,9 @@ LOCKING
   in client/common/cpucheck.cpp
 * Research use of sched_yield() for spinlock acquisition failure
 
+
 STARTUP TIME
+------------
 
 * Experiment with multi-threaded backend [thread]
 * Add connection pooling [pool]
@@ -343,8 +376,11 @@ STARTUP TIME
 * Do listen() in postmaster and accept() in pre-forked backend
 * Have pre-forked backend pre-connect to last requested database or pass
   file descriptor to backend pre-forked for matching database
+* Cache system catalog information in per-database files (Tom)
+
 
 WRITE-AHEAD LOG
+---------------
 
 * Have after-change WAL write()'s write only modified data to kernel
 * Reduce number of after-change WAL writes; they exist only to gaurd against
@@ -357,7 +393,9 @@ WRITE-AHEAD LOG
 * Add checkpoint_min_warning postgresql.conf option to warn about checkpoints
   that are too frequent
 
-OPTIMIZER/EXECUTOR
+
+OPTIMIZER / EXECUTOR
+--------------------
 
 * Improve Subplan list handling
 * Allow Subplans to use efficient joins(hash, merge) with upper variable
@@ -373,7 +411,9 @@ OPTIMIZER/EXECUTOR
 * Missing optimizer selectivities for date, r-tree, etc. [optimizer]
 * Allow ORDER BY ... LIMIT to select top values without sort or index
 
+
 MISCELLANEOUS
+-------------
 
 * Do async I/O for faster random read-ahead of data
 * Get faster regex() code from Henry Spencer <henry@zoo.utoronto.ca>
@@ -382,7 +422,8 @@ MISCELLANEOUS
 
 
 SOURCE CODE
------------
+===========
+
 * Add use of 'const' for variables in source tree
 * Fix problems with libpq non-blocking/async code [async]
 * Make sure all block numbers are unsigned to increase maximum table size