can use pg_upgrade to upgrade to this release.
Detailed Change List
-
Bug Fixes
---------
Prevent function calls with more than maximum number of arguments (Tom)
Fix handling of temp tables in complex situations (Bruce, Tom)
Allow table locking when tables opened, improving concurrent reliability (Tom)
Properly quote sequence names in pg_dump (Ross J. Reedstrom)
-Prevent DESTROY DATABASE while others accessing
+Prevent DROP DATABASE while others accessing
Prevent any rows from being returned by GROUP BY if no rows processed (Tom)
Fix SELECT COUNT(1) FROM table WHERE ...' if no rows matching WHERE (Tom)
Fix pg_upgrade so it works for MVCC(Tom)
Fix log() on numeric type (Tom)
Deprecate ':' and ';' operators
Allow vacuum of temporary tables
+Disallow inherited columns with the same name as new columns
+Recover or force failure when disk space is exhausted(Hiroshi)
+Fix INSERT INTO ... SELECT with AS columns matching result columns
+Fix INSERT ... SELECT ... GROUP BY groups by target columns not source columns(Tom)
+Fix CREATE TABLE test (a char(5) DEFAULT text '', b int4) with INSERT(Tom)
+Fix UNION with LIMIT
+Fix CREATE TABLE x AS SELECT 1 UNION SELECT 2
+Fix CREATE TABLE test(col char(2) DEFAULT user)
+Fix mismatched types in CREATE TABLE ... DEFAULT
+Fix SELECT * FROM pg_class where oid in (0,-1)
+Fix SELECT COUNT('asdf') FROM pg_class WHERE oid=12
+Prevent user who can create databases can modifying pg_database table(Peter E)
+Fix btree to give a useful elog when key > 1/2 (page - overhead)(Tom)
+Fix INSERT of 0.0 into DECIMAL(4,4) field(Tom)
Enhancements
------------
Add btree indexing of boolean values, >= and <= (Don Baccus)
Print current line number when COPY FROM fails (Massimo)
Recognize special case of POSIX time zone: "GMT+8" and "GMT-8" (Thomas)
-Add DEC as synonym for "DECIMAL (Thomas)
+Add DEC as synonym for "DECIMAL" (Thomas)
Add SESSION_USER as SQL92 keyword, same as CURRENT_USER (Thomas)
Implement column aliases (aka correlation names) and join syntax (Thomas)
Allow queries like SELECT a FROM t1 tx (a) (Thomas)
New SET SEED command
New pg_options.sample file
New SET FSYNC command (Massimo)
+Allow pg_descriptions when creating tables
+Allow pg_descriptions when creating types, columns, and functions
+Allow psql \copy to allow delimiters(Peter E)
+Allow psql to print nulls as distinct from "" [null](Peter E)
Types
-----
Add exp() and ln() as NUMERIC types
Allow SELECT float8(COUNT(*)) / (SELECT COUNT(*) FROM int4_tbl) FROM int4_tbl
GROUP BY f1; (Tom)
+Allow LOCALE to use indexes in regular expression searches(Tom)
+Allow creation of functional indexes to use default types
Performance
-----------
Major subquery speedup (Tom)
Fewer fsync writes when fsync is not disabled(Tom)
Improved LIKE optimizer estimates(Tom)
+Prevent fsync in SELECT-only queries(Vadim)
+Make index creation use psort code, because it is now faster(Tom)
+Allow creation of sort temp tables > 1 Gig
Source Tree Changes
-------------------
RELIABILITY
-----------
-RESOURCES
-
-* -Disallow inherited columns with the same name as new columns
-* -Elog() does not free all its memory
-* -spinlock stuck problem when elog(FATAL) and elog(ERROR) inside bufmgr
-* -Recover or force failure when disk space is exhausted(Hiroshi)
-
PARSER
-* -INSERT INTO ... SELECT with AS columns matching result columns problem
* SELECT pg_class FROM pg_class generates strange error
* Alter TABLE ADD COLUMN does not honor DEFAULT, add CONSTRAINT
-* -Select a[1] FROM test fails, it needs test.a[1](Tom)
-* -Array index references without table name cause problems [array](Tom)
* Creating index of TIMESTAMP & RELTIME fails, or rename to DATETIME(Thomas)
* SELECT foo UNION SELECT foo is incorrectly simplified to SELECT foo
-* -INSERT ... SELECT ... GROUP BY groups by target columns not source columns(Tom)
-* -CREATE TABLE test (a char(5) DEFAULT text '', b int4) fails on INSERT(Tom)
-* -UNION with LIMIT fails
* Unique index on base column not honored on inserts from inherited table
INSERT INTO inherit_table (unique_index_col) VALUES (dup) should fail
[inherit]
-* -CREATE TABLE x AS SELECT 1 UNION SELECT 2 fails
-* -CREATE TABLE test(col char(2) DEFAULT user) fails in length restriction
-* -mismatched types in CREATE TABLE ... DEFAULT causes problems [default]
-* -SELECT ... UNION ... ORDER BY fails when sort expr not in result
- list, ORDER BY is applied only to the first SELECT
-
* Be smarter about promoting types when UNION merges different data types
* redesign INSERT ... SELECT to have two levels of target list
-* -select * from pg_class where oid in (0,-1)
* have INTERSECT/EXCEPT prevent duplicates unless ALL is specified
-* -prevent primary key that exceeds max index columns [primary]
-* -SELECT COUNT('asdf') FROM pg_class WHERE oid=12 crashes
* SELECT DISTINCT ON col1 col1 col2 FROM tab1 is broken [distinct]
-* -require SELECT DISTINCT target list to have all ORDER BY columns
-* -When using aggregates + GROUP BY, no rows in should yield no rows out(Tom)
-* -Allow HAVING to use comparisons that have no aggregates(Tom)
-* -Allow COUNT(DISTINCT col))(TOm)
* SELECT 'x'::varchar(10) INTO newtable; fails
* SELECT col::DECIMAL(12,10); fails
VIEWS
* Views containing aggregates sometimes fail(Jan)
-* -Views with spaces in view name fail when referenced
* Creating view and inheriting the view causes view* to show
duplicates(inherit)
* Disallow LOCK on view
MISC
-* -User who can create databases can modify pg_database table(Peter E)
* Plpgsql does not handle quoted mixed-case identifiers
-* -Fix btree to give a useful elog when key > 1/2 (page - overhead)(Tom)
-* -pg_dump should preserve primary key information(Peter E)
-* -plpgsql regression tests fails on BSD/OS
-* -database names with spaces fail
-* -insert of 0.0 into DECIMAL(4,4) field fails(Tom)
-* -* Interlock to prevent DROP DATABASE on a database with running backendsInterlock to prevent DROP DATABASE on a database with running backends
* Buffer reference counting bugfixes
* Fix libpq bug that causes it to drop backend error message sent
just before connection closure (ie, any FATAL error message)
URGENT
-* -Add referential integrity(Jan)[primary]
* Add MATCH PARTIAL referential integrity
* Foreign key does not check that columns referenced form a primary key
or constrained by UNIQUE
* Add OUTER joins, left and right[outer](Thomas, Bruce)
* Allow long tuples by chaining or auto-storing outside db (TOAST)(Jan)
-* -Eliminate limits on query length
* Fix memory leak for expressions[memory](Tom?)
-* -Fix memory leak for aggregates(Tom)
ADMIN
-* -Better interface for adding to pg_group(Peter E)
* More access control over who can create tables and access the database
* Test syslog functionality
* Allow elog() to return error codes, not just messages
* Allow international error message support and add error codes
-* -Generate postmaster pid file and remove flock/fcntl lock code[flock](Tatsuo)
* Add ability to specifiy location of lock/socket files [flock]
* Unify configuration into one configuration file
TYPES
-* -Add BIT, BIT VARYING
* Nchar (as distinguished from ordinary varchar),
* Domain capability
* Add STDDEV/VARIANCE() function for standard deviation computation/variance
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
-* -Allow pg_descriptions when creating tables
-* -Allow pg_descriptions when creating types, columns, and functions
* Add IPv6 capability to INET/CIDR types
* Make a separate SERIAL type?
* Store binary-compatible type information in the system
* Add support for & operator
* Allow LOCALE on a per-column basis, default to ASCII
-* -Allow LOCALE to use indexes in regular expression searches(Tom)
-* -Allow array on int8[](Thomas)
* Allow nulls in arrays
* Allow arrays to be ORDER'ed
* Remove Money type, add money formatting for decimal type
* Declare typein/out functions in pg_proc with a special "C string" data type
* Add non-large-object binary field
-* -Add index on NUMERIC/DECIMAL type(Jan)
-* -Make Absolutetime/Relativetime int4 because time_t can be int8 on some ports
- (Peter E)
* Functions returning sets don't really work right[function]
* Make type equivalency apply to aggregates(Peter E.)
* 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(Peter E)
* Allow SQL function indexes
* Add FILLFACTOR to index creation
-* -Allow indexing of LIKE with localle character sets
-* -Allow indexing of more than eight columns
COMMANDS
* ALTER TABLE ADD COLUMN to inherited table put column in wrong place [inherit]
-* -Add ALTER TABLE DROP/ALTER COLUMN feature(Peter E)
+* Add ALTER TABLE DROP/ALTER COLUMN feature(Peter E)
* Allow CLUSTER on all tables at once, and improve CLUSTER, loses NOT
NULL specification, indexes, permissions, etc on table[cluster]
* Add SIMILAR TO to allow character classes, 'pg_[a-c]%'
* Allow ESCAPE '\' at the end of LIKE for ANSI compliance [like]
* Rewrite the LIKE handling by rewriting the user string with the
supplied ESCAPE [like]
-* -Move LIKE index optimization handling to the optimizer(Tom)
* Allow RULE recompilation
* Support UNION/INTERSECT/EXCEPT in sub-selects
* Allow DELETE and UPDATE to use inheritance using tablename*
* 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(Peter E)
* Update reltuples from COPY command
-* -Allow psql \copy to allow delimiters(Peter E)
-* -Add a function to return the last inserted oid, for use in psql
- scripts (Peter E)
-* -Allow psql to print nulls as distinct from "" [null](Peter E)
* fix array handling for ECPG
* add pg_dump option to dump type names as standard ANSI types
* allow psql \d to show primary and foreign keys
* Certain indexes will not shrink, i.e. oid indexes with many inserts(Vadim)
* 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(Hiroshi)
* Allow cursors to be DECLAREd/OPENed/CLOSEed outside transactions
* Allow DELETE WHERE CURRENT OF cursor
-* -Allow PQrequestCancel() to terminate when in waiting-for-lock state
* Transaction log, so re-do log can be on a separate disk by
with after-row images(Vadim) [logging](Vadim)(in-progress)
* Populate backend status area and write program to dump status data
* Make oid use unsigned int more reliably, pg_atoi()
-* -Allow subqueries in target list(Tom)
* Put sort files, large objects in their own directory
* Do autocommit so always in a transaction block(?)
* Show location of syntax error in query [yacc]
* Redesign the function call interface to handle NULLs better[function](Tom)
-* -Document/trigger/rule so changes to pg_shadow recreate pg_pwd
- [pg_shadow](Peter E.)
* Missing optimizer selectivities for date, r-tree, etc. [optimizer]
-* -Overhaul mdmgr/smgr to fix double unlinking and double opens, cleanup
* Overhaul bufmgr/lockmgr/transaction manager
-* -Add PL/Perl(Mark Hollomon)
-* -Add option for postgres user have a password by default(Peter E)
* Add configure test to check for C++ need for *.h and namespaces
* Allow BLCKSZ <= 64k, not <= 32k
* redesign UNION structures to have separarate target lists
FSYNC
* Allow transaction commits with rollback with no-fsync performance [fsync](Vadim)
-* -Prevent fsync in SELECT-only queries(Vadim)
INDEXES
* Use indexes in ORDER BY for min(), max()
* Use index to restrict rows returned by multi-key index when used with
non-consecutive keys or OR clauses, so fewer heap accesses
-* -Convert function(constant) into a constant for index use(Bernard Frankpitt)
* Improve LIMIT processing by using index to limit rows processed [limit]
* Have optimizer take LIMIT into account when considering index scans [limit]
-* -Make index creation use psort code, because it is now faster(Tom)
-* -Allow creation of sort temp tables > 1 Gig
-* -Create more system table indexes for faster cache lookups
-* -fix indexscan() so it does leak memory by not requiring caller to
-free(Tom)
-* -Improve _bt_binsrch() to handle equal keys better, remove _bt_firsteq()(Tom)
* Allow SELECT * FROM tab WHERE int2col = 4 use int2col index, int8,
float4, numeric/decimal too [optimizer]
-* -Allow optimizer to prefer plans that match ORDER BY(Tom)
* Include heap CTID in btree index keys, remove equal-key cruft from btree
CACHE
* Cache most recent query plan(s) [prepare]
* Shared catalog cache, reduce lseek()'s by caching table size in shared area
-* -elog() flushes cache, try invalidating just entries from current xact,
- perhaps using invalidation cache
-
MISC
* Allow char() not to use variable-sized header to reduce disk size
* Allow char1 data type that takes one byte of storage
* Do async I/O to do better read-ahead of data
-* -Fix memory exhaustion when using many OR's [cnfify](Tom)
* Get faster regex() code from Henry Spencer <henry@zoo.utoronto.ca>
when it is available
* Use mmap() rather than SYSV shared memory(?)
-* -Process const = const parts of OR clause in separate pass(Bernard Frankpitt)
* Make oid use oidin/oidout not int4in/int4out in pg_type.h
* Improve Subplan list handling
* Allow Subplans to use efficient joins(hash, merge) with upper variable
places, like GROUP BY, UNIQUE, index processing, etc.
* improve dynamic memory allocation by introducing tuple-context memory
allocation [memory]
-* -fix memory leak in cache code when non-existant table is referenced
* In WHERE tab1.x=3 AND tab1.x=tab2.y, add tab2.y=3
-* -pass atttypmod through parser in more cases [atttypmod]
-* -remove duplicate type in/out functions for disk and net
* Allow persistent backends [persistent]
* others [performance]
* prevent labels from being output for stored rules (Tom)
-----------
* Add use of 'const' for variables in source tree
* Fix C optimizer problem where fmgr_ptr calls return different types [alpha]
-* -Add needed includes and removed unneeded include files(Bruce)
-* -Make configure --enable-debug add -g on compile line(Peter E)
* Does Mariposa source contain any other bug fixes?
* Remove SET KSQO option if OR processing is improved(Tom)
-* -Pre-generate lex and yacc output so not required for install(Peter E)
* Use macros to define NT open() file parameters, remove NT-specific defines
* Change CURRENT to OLD internally for rules
<!--
-$Header: /cvsroot/pgsql/doc/src/sgml/release.sgml,v 1.43 2000/04/18 14:55:27 momjian Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/release.sgml,v 1.44 2000/04/18 21:18:43 momjian Exp $
-->
<chapter id="release">
Fix handling of temp tables in complex situations (Bruce, Tom)
Allow table locking when tables opened, improving concurrent reliability (Tom)
Properly quote sequence names in pg_dump (Ross J. Reedstrom)
-Prevent DESTROY DATABASE while others accessing
+Prevent DROP DATABASE while others accessing
Prevent any rows from being returned by GROUP BY if no rows processed (Tom)
Fix SELECT COUNT(1) FROM table WHERE ...' if no rows matching WHERE (Tom)
Fix pg_upgrade so it works for MVCC(Tom)
Fix log() on numeric type (Tom)
Deprecate ':' and ';' operators
Allow vacuum of temporary tables
+Disallow inherited columns with the same name as new columns
+Recover or force failure when disk space is exhausted(Hiroshi)
+Fix INSERT INTO ... SELECT with AS columns matching result columns
+Fix INSERT ... SELECT ... GROUP BY groups by target columns not source columns(Tom)
+Fix CREATE TABLE test (a char(5) DEFAULT text '', b int4) with INSERT(Tom)
+Fix UNION with LIMIT
+Fix CREATE TABLE x AS SELECT 1 UNION SELECT 2
+Fix CREATE TABLE test(col char(2) DEFAULT user)
+Fix mismatched types in CREATE TABLE ... DEFAULT
+Fix SELECT * FROM pg_class where oid in (0,-1)
+Fix SELECT COUNT('asdf') FROM pg_class WHERE oid=12
+Prevent user who can create databases can modifying pg_database table(Peter E)
+Fix btree to give a useful elog when key > 1/2 (page - overhead)(Tom)
+Fix INSERT of 0.0 into DECIMAL(4,4) field(Tom)
Enhancements
------------
Add btree indexing of boolean values, >= and <= (Don Baccus)
Print current line number when COPY FROM fails (Massimo)
Recognize special case of POSIX time zone: "GMT+8" and "GMT-8" (Thomas)
-Add DEC as synonym for "DECIMAL (Thomas)
+Add DEC as synonym for "DECIMAL" (Thomas)
Add SESSION_USER as SQL92 keyword, same as CURRENT_USER (Thomas)
Implement column aliases (aka correlation names) and join syntax (Thomas)
Allow queries like SELECT a FROM t1 tx (a) (Thomas)
New SET SEED command
New pg_options.sample file
New SET FSYNC command (Massimo)
+Allow pg_descriptions when creating tables
+Allow pg_descriptions when creating types, columns, and functions
+Allow psql \copy to allow delimiters(Peter E)
+Allow psql to print nulls as distinct from "" [null](Peter E)
Types
-----
Add exp() and ln() as NUMERIC types
Allow SELECT float8(COUNT(*)) / (SELECT COUNT(*) FROM int4_tbl) FROM int4_tbl
GROUP BY f1; (Tom)
+Allow LOCALE to use indexes in regular expression searches(Tom)
+Allow creation of functional indexes to use default types
Performance
-----------
Major subquery speedup (Tom)
Fewer fsync writes when fsync is not disabled(Tom)
Improved LIKE optimizer estimates(Tom)
+Prevent fsync in SELECT-only queries(Vadim)
+Make index creation use psort code, because it is now faster(Tom)
+Allow creation of sort temp tables > 1 Gig
Source Tree Changes
-------------------