Index: doc/src/sgml/release.sgml
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RCS file: /var/lib/cvs/pgsql-server/doc/src/sgml/release.sgml,v
retrieving revision 1.215
diff -c -r1.215 release.sgml
*** doc/src/sgml/release.sgml 22 Oct 2003 05:09:12 -0000 1.215
--- doc/src/sgml/release.sgml 22 Oct 2003 06:18:20 -0000
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*** 8,35 ****
Release 7.4
-
-
-
Overview
Major changes in this release:
IPv6
Full support for IPv6 connections and IPv6 address
--- 8,33 ----
Release 7.4
Overview
Major changes in this release:
+ Performance
+
+ IN/NOT IN subqueries are now much more efficient
+
+
+ Improved GROUP BY processing by using hash buckets
+
+ New multi-key hash join capability
+
+ ANSI joins are now better optimized
+
+ Faster and more powerful regular expression code
+
+ Function-inlining for simple SQL functions
+
+
IPv6
Full support for IPv6 connections and IPv6 address
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*** 50,57 ****
Standards Compliance
! Implement information schema Support for read-only
! transactions
Make cursors comply more closely with the SQL standard
--- 48,56 ----
Standards Compliance
! Implement information schema
!
! Support for read-only transactions
Make cursors comply more closely with the SQL standard
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*** 65,86 ****
and adds error codes, status information, a binary protocol, error
reporting verbosity, and cleaner startup packets.
-
- Performance
-
- IN/NOT IN subqueries now perform as efficiently as
- joins
-
- Improved GROUP BY processing by using hash buckets
-
- New multi-key hash join capability
-
- ANSI joins are now better optimized
-
- Faster and more powerful regular expression code
-
- Function-inlining for simple SQL functions
-
Holdable Cursors
--- 64,69 ----
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*** 116,122 ****
in client applications and languages.
Error message wording has changed substantially in this release,
and error codes have been added.
! ANSI joins may behave differently because they are now better optimized
A number of server variables have been renamed for clarity
MOVE/FETCH 0 now does nothing; return value of MOVE/FETCH 1/0
varies based on the current offset in the cursor
--- 99,105 ----
in client applications and languages.
Error message wording has changed substantially in this release,
and error codes have been added.
! ANSI inner joins may behave differently because they are now better optimized
A number of server variables have been renamed for clarity
MOVE/FETCH 0 now does nothing; return value of MOVE/FETCH 1/0
varies based on the current offset in the cursor
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*** 156,162 ****
Preserve free space information between postmaster restarts (Tom)
Set proper schema permissions in initdb (Peter)
Add start time to pg_stat_activity (Neil)
! New code to detect corrupt disk pages; erase with zero_damaged_pages (Tom)
New client/server protocol: faster, no username length limit, allow
clean exit from COPY (Tom)
Add transaction status, tableid, columnid to backend protocol (Tom)
--- 139,145 ----
Preserve free space information between postmaster restarts (Tom)
Set proper schema permissions in initdb (Peter)
Add start time to pg_stat_activity (Neil)
! New code to detect corrupt disk pages; erase with zero_damaged_pages (Tom)
New client/server protocol: faster, no username length limit, allow
clean exit from COPY (Tom)
Add transaction status, tableid, columnid to backend protocol (Tom)
***************
*** 185,193 ****
Assume WHERE a.x = b.y and b.y = 42 also means a.x = 42 (Tom)
Allow hash/merge joins on complex joins (Tom)
Allow hash joins for more data types (Tom)
! Allow join optimization of ANSI joins, disable with join_collapse_limit (Tom)
Add from_collapse_limit to control conversion of subqueries to joins (Tom)
! Use faster regular expression code from TCL (Henry Spencer, Tom)
Use bit-mapped relation sets in the optimizer (Tom)
Improve backend startup time (Tom)
Improve trigger/constraint performance (Stephan)
--- 168,176 ----
Assume WHERE a.x = b.y and b.y = 42 also means a.x = 42 (Tom)
Allow hash/merge joins on complex joins (Tom)
Allow hash joins for more data types (Tom)
! Allow join optimization of ANSI inner joins, disable with join_collapse_limit (Tom)
Add from_collapse_limit to control conversion of subqueries to joins (Tom)
! Use faster and more powerful regular expression code from TCL (Henry Spencer, Tom)
Use bit-mapped relation sets in the optimizer (Tom)
Improve backend startup time (Tom)
Improve trigger/constraint performance (Stephan)
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*** 195,200 ****
--- 178,184 ----
Fix hash indexes which were broken in rare cases (Tom)
Improve hash index concurrency and speed (Tom)
Align shared buffers on 32-byte boundary for copy speed improvement (Manfred Spraul)
+ The NUMERIC datatype has been reimplemented for better performance (Tom)
Server Configuration
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*** 215,223 ****
Allow pg_hba.conf to accept netmasks in CIDR format (Andrew Dunstan)
New is_superuser read-only variable (Tom)
New server-side parameter log_error_verbosity to control error detail (Tom)
! postgres --help-config now dumps server config variables (Aizaz Ahmed)
Make default shared_buffers 1000 and max_connections 100, if possible (Tom)
! Add new columns in pg_settings: context, type, source , min_val, max_val (Joe)
New pg_hba.conf 'hostnossl' to prevent SSL connections (Jon Jensen)
Remove geqo_random_seed server parameter (Tom)
--- 199,207 ----
Allow pg_hba.conf to accept netmasks in CIDR format (Andrew Dunstan)
New is_superuser read-only variable (Tom)
New server-side parameter log_error_verbosity to control error detail (Tom)
! postgres --describe-config now dumps server config variables (Aizaz Ahmed, Peter)
Make default shared_buffers 1000 and max_connections 100, if possible (Tom)
! Add new columns in pg_settings: context, type, source, min_val, max_val (Joe)
New pg_hba.conf 'hostnossl' to prevent SSL connections (Jon Jensen)
Remove geqo_random_seed server parameter (Tom)
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*** 262,272 ****
Utility Commands
! Add ON COMMIT PRESERVE ROWS for temp tables (Gavin)
Allow cursors outside transactions using WITH HOLD (Neil)
Make MOVE/FETCH 0 actually move/fetch 0 (Bruce)
! Cause FETCH 1 to return the current cursor row, or zero if at
! beginning/end of cursor, per SQL spec (Bruce)
Have MOVE return 0 or 1 depending on cursor position (Bruce)
Properly handle SCROLL with cursors, or report an error (Neil)
Implement SQL92-compatible FIRST, LAST, ABSOLUTE n, RELATIVE n options
--- 246,255 ----
Utility Commands
! Add ON COMMIT clause to CREATE TABLE for temp tables (Gavin)
Allow cursors outside transactions using WITH HOLD (Neil)
Make MOVE/FETCH 0 actually move/fetch 0 (Bruce)
! Cause FETCH 0 to return the current cursor row, per SQL spec (Bruce)
Have MOVE return 0 or 1 depending on cursor position (Bruce)
Properly handle SCROLL with cursors, or report an error (Neil)
Implement SQL92-compatible FIRST, LAST, ABSOLUTE n, RELATIVE n options
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*** 295,301 ****
CHECK constraints (Christopher)
Improve VACUUM performance on indexes by reducing WAL traffic (Tom)
Allow pg_ctl to better handle non-standard ports (Greg)
! Functional indexes now support indexes on column expressions (Tom)
Syntax errors now reported as 'syntax error' rather than 'parse error' (Tom)
Have SHOW TRANSACTION_ISOLATION match input to SET TRANSACTION_ISOLATION (Tom)
Have COMMENT ON DATABASE on non-local database generate a warning (Rod)
--- 278,284 ----
CHECK constraints (Christopher)
Improve VACUUM performance on indexes by reducing WAL traffic (Tom)
Allow pg_ctl to better handle non-standard ports (Greg)
! Functional indexes have been generalized into expressional indexes (Tom)
Syntax errors now reported as 'syntax error' rather than 'parse error' (Tom)
Have SHOW TRANSACTION_ISOLATION match input to SET TRANSACTION_ISOLATION (Tom)
Have COMMENT ON DATABASE on non-local database generate a warning (Rod)
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*** 303,308 ****
--- 286,292 ----
Allow REINDEX to reliably reindex non-shared system catalog indexes (Tom)
pg_dump --use-set-session-authorization and --no-reconnect now do nothing,
all dumps use SET SESSION AUTHORIZATION
+ Long options for pg_dump are now available on all platforms
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*** 338,344 ****
Allow CIDR data type to be cast to text (Tom)
Allow the creation of special LIKE indexes for non-C locales (Peter)
Disallow invalid timezone names (Tom)
! Trim trailing spaces when CHAR() data is cast to VARCHAR or TEXT (Tom)
Make FLOAT(p) measure the precision p in bits, not decimal digits (Tom)
Add IPv6 support to the inet and cidr data types (Michael Graff)
Add family() function to report whether address is IPv4 or IPv6 (Michael Graff)
--- 322,328 ----
Allow CIDR data type to be cast to text (Tom)
Allow the creation of special LIKE indexes for non-C locales (Peter)
Disallow invalid timezone names (Tom)
! Trim trailing spaces when CHAR() is cast to VARCHAR or TEXT (Tom)
Make FLOAT(p) measure the precision p in bits, not decimal digits (Tom)
Add IPv6 support to the inet and cidr data types (Michael Graff)
Add family() function to report whether address is IPv4 or IPv6 (Michael Graff)
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*** 383,389 ****
Add "\pset pager always" to always use pager (Greg)
Improve tab completion (Rod, Ross Reedstrom, Ian Barwick)
Reorder \? help into groupings (Harald Armin Massa, Bruce)
! Add schema, cast, and conversion backslash commands (Christopher)
\encoding now changes based on client_encoding server variable (Tom)
Save edit history into readline history (Ross)
Improve \d display (Christopher)
--- 367,373 ----
Add "\pset pager always" to always use pager (Greg)
Improve tab completion (Rod, Ross Reedstrom, Ian Barwick)
Reorder \? help into groupings (Harald Armin Massa, Bruce)
! Add backslash commands for listing schemas, casts, and conversions (Christopher)
\encoding now changes based on client_encoding server variable (Tom)
Save edit history into readline history (Ross)
Improve \d display (Christopher)
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*** 391,396 ****
--- 375,381 ----
New '\set AUTOCOMMIT off' capability (Tom)
New '\set VERBOSITY' to control error detail (Tom)
New %T prompt string to show transaction status (Tom)
+ Long options for psql are now available on all platforms
Libpq
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*** 441,447 ****
Prevent need for separate platform geometry regression result files (Tom)
Improved PPC locking primitive (Reinhard Max)
Embed LD_LIBRARY_PATH used for build process into binaries (Billy)
! New palloc0 to allocate and clear memory (Bruce)
Fix locking code for s390x CPU (64-bit) (Tom)
Allow OpenBSD to use local ident credentials (William Ahern)
Make query plan trees read-only to executor (Tom)
--- 426,432 ----
Prevent need for separate platform geometry regression result files (Tom)
Improved PPC locking primitive (Reinhard Max)
Embed LD_LIBRARY_PATH used for build process into binaries (Billy)
! New palloc0 function to allocate and clear memory (Bruce)
Fix locking code for s390x CPU (64-bit) (Tom)
Allow OpenBSD to use local ident credentials (William Ahern)
Make query plan trees read-only to executor (Tom)
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*** 449,455 ****
Allow libpq to compile with Borland C++ compiler (Lester Godwin, Karl Waclawek)
Use our own version of getopt_long() if needed (Peter)
Convert administration scripts to C (Peter)
! Bison >=1.85 is now required for grammar changes
Merge documentation into one book (Peter)
Add Win32 compatibility functions (Bruce)
Allow client interfaces to compile under MinGW/Win32 (Bruce)
--- 434,440 ----
Allow libpq to compile with Borland C++ compiler (Lester Godwin, Karl Waclawek)
Use our own version of getopt_long() if needed (Peter)
Convert administration scripts to C (Peter)
! Bison >= 1.85 is now required to build the PostgreSQL grammar, if building from CVS
Merge documentation into one book (Peter)
Add Win32 compatibility functions (Bruce)
Allow client interfaces to compile under MinGW/Win32 (Bruce)
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*** 457,463 ****
Support Intel Linux compiler (Peter)
Improve Linux startup scripts (Slawomir Sudnik, Darko Prenosil)
Add support for AMD Opteron and Itanium (Jeffrey W. Baker, Bruce)
! Remove configure --enable-recode
Generate a compile error if spinlock code is not found (Bruce)
--- 442,448 ----
Support Intel Linux compiler (Peter)
Improve Linux startup scripts (Slawomir Sudnik, Darko Prenosil)
Add support for AMD Opteron and Itanium (Jeffrey W. Baker, Bruce)
! Remove --enable-recode option to configure
Generate a compile error if spinlock code is not found (Bruce)
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*** 490,550 ****
Other Uncategorized
- EXTRACT(TIMEZONE) and SET/SHOW
- TIMEZONE now follow SQL sign convention
- (positive = east of UTC)
DATESTYLE can now be set to DMY, YMD, or MDY to specify input field order
Input date order must now be YYYY-MM-DD (with 4-digit
year) or match DATESTYLE
- Output of SHOW DATESTYLE is now in the same
- format accepted by SET DATESTYLE
- PL/Python is now an untrusted language, and is renamed
- to plpythonu
- Dollar sign ($) is no longer allowed in operator names
- Dollar sign ($) can be a non-first character in identifiers
- Precision in FLOAT(p) is now interpreted as bits, not decimal digits
- Functional indexes have been generalized into expressional indexes
- CHAR(n) to TEXT conversion automatically strips trailing blanks
Pattern matching operations can use indexes regardless of locale
- New frontend/backend protocol supports many long-requested features
- SET AUTOCOMMIT TO OFF is no longer
- supported; psql has an AUTOCOMMIT variable
- Reimplementation of NUMERIC datatype for more speed
- New regular expression package, many more regexp features (most of Perl5)
- Can now do EXPLAIN ... EXECUTE to see plan used for a prepared query
- Explicit JOINs no longer constrain query
- plan, unless JOIN_COLLAPSE_LIMIT = 1
- Performance of foo IN (SELECT ...) queries has been considerably improved
- FETCH 0 now re-fetches cursor's current row, per SQL spec
- Revised executor state representation; plan trees are read-only to executor now
- Information schema
- Domains now support CHECK constraints
- psql backslash commands for listing conversions, casts, and schemas
- TRUNCATE TABLE is transaction-safe
- CLUSTER can re-cluster a previously clustered table, or all such tables
- Statement-level triggers
- System can use either hash- or sort-based strategy for grouped aggregation
- ON COMMIT options for temp tables
- extra_float_digits option allows pg_dump to dump float data accurately
- Long options for psql and
- pg_dump are now available on all platforms
- Read-only transactions
- Object owners can allow grantees to grant the
- privilege to others (grant option)
-
- Added contrib module for
- pg_autovacuum which monitors inserts and
- deletes, and does ANALYZE or VACUUM
- ANALYZE when quantities exceed specified
- thresholds.
-
-
-
-
Release 7.3.4
--- 475,488 ----