+ url="http://developer.postgresql.org/~momjian/upgrade_tips_7.3">.
+
+
+ Observe the following incompatibilities:
+
+
+
+
+ Pre-6.3 clients are no longer supported.
+
+
+
+
+ pg_hba.conf now has a column for the user
+ name and additional features. Existing files need to be
+ adjusted.
+
+
+
+
+ Several postgresql.conf logging parameters
+ have been renamed.
+
+
+
+
+ LIMIT #,# has been disabled; use
+ LIMIT # OFFSET # .
+
+
+
+
+ INSERT statements with column lists must
+ specify a value for each specified column. For example,
+ INSERT INTO tab (col1, col2) VALUES ('val1')
+ is now invalid. It's still allowed to supply fewer columns than
+ expected if the INSERT does not have a column list.
+
+
+
+
+ serial columns are no longer automatically
+ UNIQUE; thus, an index will not automatically be
+ created.
+
+
+
+
+ A SET command inside an aborted transaction
+ is now rolled back.
+
+
+
+
+ COPY no longer considers missing trailing
+ columns to be null. All columns need to be specified.
+ (However, one can achieve a similar effect by specifying a
+ column list in the COPY command.)
+
+
+
+
+ The data type timestamp is now equivalent to
+ timestamp without time zone , instead of
+ timestamp with time zone .
+
+
+
+
+ Pre-7.3 databases loaded into 7.3 will not have the new object
+ dependencies for serial columns, unique
+ constraints, and foreign keys. See the directory
+ contrib/adddepend/ for a detailed
+ description and a script that will add such dependencies.
+
+
+
+
+ An empty string ('' ) is no longer allowed as
+ the input into an integer field. Formerly, it was silently
+ interpreted as 0.
+
+
+
+
+
+
+
+
Changes
+
+
+
Server Operation
+
+
Add pg_locks view to show locks (Neil) +
Security fixes for password negotiation memory allocation (Neil) +
Remove support for version 0 FE/BE protocol (PostgreSQL 6.2 and earlier) (Tom) +
Reserve the last few backend slots for superusers, add parameter superuser_reserved_connections to control this (Nigel J. Andrews) +
+
+
+
+
Performance
+
+
Improve startup by calling localtime() only once (Tom) +
Cache system catalog information in flat files for faster startup (Tom) +
Improve caching of index information (Tom) +
Optimizer improvements (Tom, Fernando Nasser) +
Catalog caches now store failed lookups (Tom) +
Hash function improvements (Neil) +
Improve performance of query tokenization and network handling (Peter) +
Speed improvement for large object restore (Mario Weilguni) +
Mark expired index entries on first lookup, saving later heap fetches (Tom) +
Avoid excessive NULL bitmap padding (Manfred Koizar) +
Add BSD-licensed qsort() for Solaris, for performance (Bruce) +
Reduce per-row overhead by four bytes (Manfred Koizar) +
Fix GEQO optimizer bug (Neil Conway) +
Make WITHOUT OID actually save four bytes per row (Manfred Koizar) +
Add default_statistics_target variable to specify ANALYZE buckets (Neil) +
Use local buffer cache for temporary tables so no WAL overhead (Tom) +
Improve free space map performance on large tables (Stephen Marshall, Tom) +
Improved WAL write concurrency (Tom) +
+
+
+
+
Privileges
+
+
Add privileges on functions and procedural languages (Peter) +
Add OWNER to CREATE DATABASE so superusers can create databases on behalf of unprivileged users (Gavin Sherry, Tom) +
Add new object privilege bits EXECUTE and USAGE (Tom) +
Add SET SESSION AUTHORIZATION DEFAULT and RESET SESSION AUTHORIZATION (Tom) +
Allow functions to be executed with the privilege of the function owner (Peter) +
+
+
+
+
Server Configuration
+
+
Server log messages now tagged with LOG, not DEBUG (Bruce) +
Add user column to pg_hba.conf (Bruce) +
Have log_connections output two lines in log file (Tom) +
Remove debug_level from postgresql.conf, now server_min_messages (Bruce) +
New ALTER DATABASE/USER ... SET command for per-user/database initialization (Peter) +
New parameters server_min_messages and client_min_messages to control which messages are sent to the server logs or client applications (Bruce) +
Allow pg_hba.conf to specify lists of users/databases separated by commas, group names prepended with +, and file names prepended with @ (Bruce) +
Remove secondary password file capability and pg_password utility (Bruce) +
Add variable db_user_namespace for database-local user names (Bruce) +
SSL improvements (Bear Giles) +
Make encryption of stored passwords the default (Bruce) +
Allow pg_statistics to be reset by calling pg_stat_reset() (Christopher) +
Add log_duration parameter (Bruce) +
Rename debug_print_query to log_statement (Bruce) +
Rename show_query_stats to show_statement_stats (Bruce) +
Add param log_min_error_statement to print commands to logs on error (Gavin) +
+
+
+
+
Queries
+
+
Make cursors insensitive, meaning their contents do not change (Tom) +
Disable LIMIT #,# syntax; now only LIMIT # OFFSET # supported (Bruce) +
Increase identifier length to 63 (Neil, Bruce) +
UNION fixes for merging >= 3 columns of different lengths (Tom) +
Add DEFAULT key word to INSERT, e.g., INSERT ... (..., DEFAULT, ...) (Rod) +
Allow views to have default values using ALTER COLUMN ... SET DEFAULT (Neil) +
Fail on INSERTs with column lists that don't supply all column values, e.g., INSERT INTO tab (col1, col2) VALUES ('val1'); (Rod) +
Fix for join aliases (Tom) +
Fix for FULL OUTER JOINs (Tom) +
Improve reporting of invalid identifier and location (Tom, Gavin) +
Fix OPEN cursor(args) (Tom) +
Allow 'ctid' to be used in a view and currtid(viewname) (Hiroshi) +
Fix for CREATE TABLE AS with UNION (Tom) +
SQL99 syntax improvements (Thomas) +
Add statement_timeout variable to cancel queries (Bruce) +
Allow prepared queries with PREPARE/EXECUTE (Neil) +
Allow FOR UPDATE to appear after LIMIT/OFFSET (Bruce) +
Add variable autocommit (Tom, David Van Wie) +
+
+
+
+
Object Manipulation
+
+
Make equals signs optional in CREATE DATABASE (Gavin Sherry) +
Make ALTER TABLE OWNER change index ownership too (Neil) +
New ALTER TABLE tabname ALTER COLUMN colname SET STORAGE controls TOAST storage, compression (John Gray) +
Add schema support, CREATE/DROP SCHEMA (Tom) +
Create schema for temporary tables (Tom) +
Add variable search_path for schema search (Tom) +
Add ALTER TABLE SET/DROP NOT NULL (Christopher) +
New CREATE FUNCTION volatility levels (Tom) +
Make rule names unique only per table (Tom) +
Add 'ON tablename' clause to DROP RULE and COMMENT ON RULE (Tom) +
Add ALTER TRIGGER RENAME (Joe) +
New current_schema() and current_schemas() inquiry functions (Tom) +
Allow functions to return multiple rows (table functions) (Joe) +
Make WITH optional in CREATE DATABASE, for consistency (Bruce) +
Add object dependency tracking (Rod, Tom) +
Add RESTRICT/CASCADE to DROP commands (Rod) +
Add ALTER TABLE DROP for non-CHECK CONSTRAINT (Rod) +
Autodestroy sequence on DROP of table with SERIAL (Rod) +
Prevent column dropping if column is used by foreign key (Rod) +
Automatically drop constraints/functions when object is dropped (Rod) +
Add CREATE/DROP OPERATOR CLASS (Bill Studenmund, Tom) +
Add ALTER TABLE DROP COLUMN (Christopher, Tom, Hiroshi) +
Prevent inherited columns from being removed or renamed (Alvaro Herrera) +
Fix foreign key constraints to not error on intermediate database states (Stephan) +
Propagate column or table renaming to foreign key constraints +
Add CREATE OR REPLACE VIEW (Gavin, Neil, Tom) +
Add CREATE OR REPLACE RULE (Gavin, Neil, Tom) +
Have rules execute alphabetically, returning more predictable values (Tom) +
Triggers are now fired in alphabetical order (Tom) +
Add /contrib/adddepend to handle pre-7.3 object dependencies (Rod) +
Allow better casting when inserting/updating values (Tom) +
+
+
+
+
Utility Commands
+
+
Have COPY TO output embedded carriage returns and newlines as \r and \n (Tom) +
Allow DELIMITER in COPY FROM to be 8-bit clean (Tatsuo) +
Make pg_dump use ALTER TABLE ADD PRIMARY KEY, for performance (Neil) +
Disable brackets in multistatement rules (Bruce) +
Disable VACUUM from being called inside a function (Bruce) +
Allow dropdb and other scripts to use identifiers with spaces (Bruce) +
Restrict database comment changes to the current database +
Allow comments on operators, independent of the underlying function (Rod) +
Rollback SET commands in aborted transactions (Tom) +
EXPLAIN now outputs as a query (Tom) +
Display condition expressions and sort keys in EXPLAIN (Tom) +
Add 'SET LOCAL var = value' to set configuration variables for a single transaction (Tom) +
Allow ANALYZE to run in a transaction (Bruce) +
Improve COPY syntax using new WITH clauses, keep backward compatibility (Bruce) +
Fix pg_dump to consistently output tags in non-ASCII dumps (Bruce) +
Make foreign key constraints clearer in dump file (Rod) +
Add COMMENT ON CONSTRAINT (Rod) +
Allow COPY TO/FROM to specify column names (Brent Verner) +
Dump UNIQUE and PRIMARY KEY constraints as ALTER TABLE (Rod) +
Have SHOW output a query result (Joe) +
Generate failure on short COPY lines rather than pad NULLs (Neil) +
Fix CLUSTER to preserve all table attributes (Alvaro Herrera) +
New pg_settings table to view/modify GUC settings (Joe) +
Add smart quoting, portability improvements to pg_dump output (Peter) +
Dump serial columns out as SERIAL (Tom) +
Enable large file support, >2G for pg_dump (Peter, Philip Warner, Bruce) +
Disallow TRUNCATE on tables that are involved in referential constraints (Rod) +
Have TRUNCATE also auto-truncate the toast table of the relation (Tom) +
Add clusterdb utility that will auto-cluster an entire database based on previous CLUSTER operations (Alvaro Herrera) +
Overhaul pg_dumpall (Peter) +
Allow REINDEX of TOAST tables (Tom) +
Implemented START TRANSACTION, per SQL99 (Neil) +
Fix rare index corruption when a page split affects bulk delete (Tom) +
Fix ALTER TABLE ... ADD COLUMN for inheritance (Alvaro Herrera) +
+
+
+
+
Data Types and Functions
+
+
Fix factorial(0) to return 1 (Bruce) +
Date/time/timezone improvements (Thomas) +
Fix for array slice extraction (Tom) +
Fix extract/date_part to report proper microseconds for timestamp (Tatsuo) +
Allow text_substr() and bytea_substr() to read TOAST values more efficiently (John Gray) +
Add domain support (Rod) +
Make WITHOUT TIME ZONE the default for TIMESTAMP and TIME data types (Thomas) +
Allow alternate storage scheme of 64-bit integers for date/time types using --enable-integer-datetimes in configure (Thomas) +
Make timezone(timestamptz) return timestamp rather than a string (Thomas) +
Allow fractional seconds in date/time types for dates prior to 1BC (Thomas) +
Limit timestamp data types to 6 decimal places of precision (Thomas) +
Change timezone conversion functions from timetz() to timezone() (Thomas) +
Add configuration variables datestyle and timezone (Tom) +
Add OVERLAY(), which allows substitution of a substring in a string (Thomas) +
Add SIMILAR TO (Thomas, Tom) +
Add regular expression SUBSTRING(string FROM pat FOR escape) (Thomas) +
Add LOCALTIME and LOCALTIMESTAMP functions (Thomas) +
Add named composite types using CREATE TYPE typename AS (column) (Joe) +
Allow composite type definition in the table alias clause (Joe) +
Add new API to simplify creation of C language table functions (Joe) +
Remove ODBC-compatible empty parentheses from calls to SQL99 functions for which these parentheses do not match the standard (Thomas) +
Allow macaddr data type to accept 12 hex digits with no separators (Mike Wyer) +
Add CREATE/DROP CAST (Peter) +
Add IS DISTINCT FROM operator (Thomas) +
Add SQL99 TREAT() function, synonym for CAST() (Thomas) +
Add pg_backend_pid() to output backend pid (Bruce) +
Add IS OF / IS NOT OF type predicate (Thomas) +
Allow bit string constants without fully-specified length (Thomas) +
Allow conversion between 8-byte integers and bit strings (Thomas) +
Implement hex literal conversion to bit string literal (Thomas) +
Allow table functions to appear in the FROM clause (Joe) +
Increase maximum number of function parameters to 32 (Bruce) +
No longer automatically create index for SERIAL column (Tom) +
Add current_database() (Rod) +
Fix cash_words() to not overflow buffer (Tom) +
Add functions replace(), split_part(), to_hex() (Joe) +
Fix LIKE for bytea as a right-hand argument (Joe) +
Prevent crashes caused by SELECT cash_out(2) (Tom) +
Fix to_char(1,'FM999.99') to return a period (Karel) +
Fix trigger/type/language functions returning OPAQUE to return proper type (Tom) +
+
+
+
+
Internationalization
+
+
Add additional encodings: Korean (JOHAB), Thai (WIN874), Vietnamese (TCVN), Arabic (WIN1256), Simplified Chinese (GBK), Korean (UHC) (Eiji Tokuya) +
Enable locale support by default (Peter) +
Add locale variables (Peter) +
Escape byes >= 0x7f for multibyte in PQescapeBytea/PQunescapeBytea (Tatsuo) +
Add locale awareness to regular expression character classes +
Enable multibyte support by default (Tatsuo) +
Add GB18030 multibyte support (Bill Huang) +
Add CREATE/DROP CONVERSION, allowing loadable encodings (Tatsuo, Kaori) +
Add pg_conversion table (Tatsuo) +
Add SQL99 CONVERT() function (Tatsuo) +
pg_dumpall, pg_controldata, and pg_resetxlog now national-language aware (Peter) +
New and updated translations +
+
+
+
+
Server-side Languages
+
+
Allow recursive SQL function (Peter) +
Change PL/Tcl build to use configured compiler and Makefile.shlib (Peter) +
Overhaul the PL/pgSQL FOUND variable to be more Oracle-compatible (Neil, Tom) +
Allow PL/pgSQL to handle quoted identifiers (Tom) +
Allow set-returning PL/pgSQL functions (Neil) +
Make PL/pgSQL schema-aware (Joe) +
Remove some memory leaks (Nigel J. Andrews, Tom) +
+
+
+
+
psql
+
+
Don't lowercase psql \connect database name for 7.2.0 compatibility (Tom) +
Add psql \timing to time user queries (Greg Sabino Mullane) +
Have psql \d show index information (Greg Sabino Mullane) +
New psql \dD shows domains (Jonathan Eisler) +
Allow psql to show rules on views (Paul ?) +
Fix for psql variable substitution (Tom) +
Allow psql \d to show temporary table structure (Tom) +
Allow psql \d to show foreign keys (Rod) +
Fix \? to honor \pset pager (Bruce) +
Have psql reports its version number on startup (Tom) +
Allow \copy to specify column names (Tom) +
+
+
+
+
libpq
+
+
Add ~/.pgpass to store host/user password combinations (Alvaro Herrera) +
Add PQunescapeBytea() function to libpq (Patrick Welche) +
Fix for sending large queries over non-blocking connections (Bernhard Herzog) +
Fix for libpq using timers on Win9X (David Ford) +
Allow libpq notify to handle servers with different-length identifiers (Tom) +
Add libpq PQescapeString() and PQescapeBytea() to Windows (Bruce) +
Fix for SSL with non-blocking connections (Jack Bates) +
Add libpq connection timeout parameter (Denis A Ustimenko) +
+
+
+
+
JDBC
+
+
Allow JDBC to compile with JDK 1.4 (Dave) +
Add JDBC 3 support (Barry) +
Allows JDBC to set loglevel by adding ?loglevel=X to the connection URL (Barry) +
Add Driver.info() message that prints out the version number (Barry) +
Add updateable result sets (Raghu Nidagal, Dave) +
Add support for callable statements (Paul Bethe) +
Add query cancel capability +
Fix MD5 encryption handling for multibyte servers (Jun Kawai) +
Add support for prepared statements (Barry) +
+
+
+
+
Miscellaneous Interfaces
+
+
Fixed ECPG bug concerning octal numbers in single quotes (Michael) +
Move src/interfaces/libpgeasy to http://gborg.postgresql.org (Marc, Bruce) +
Improve Python interface (Elliot Lee, Andrew Johnson, Greg Copeland) +
Add libpgtcl connection close event (Gerhard Hintermayer) +
Move src/interfaces/libpq++ to http://gborg.postgresql.org (Marc, Bruce) +
Move src/interfaces/odbc to http://gborg.postgresql.org (Marc) +
Move src/interfaces/libpgeasy to http://gborg.postgresql.org (Marc, Bruce) +
Move src/interfaces/perl5 to http://gborg.postgresql.org (Marc, Bruce) +
Remove src/bin/pgaccess from main tree, now at http://www.pgaccess.org (Bruce) +
Add pg_on_connection_loss command to libpgtcl (Gerhard Hintermayer, Tom) +
+
+
+
+
Source Code
+
+
Fix for parallel make (Peter) +
AIX fixes for linking Tcl (Andreas Zeugswetter) +
Allow PL/Perl to build under Cygwin (Jason Tishler) +
Improve MIPS compiles (Peter, Oliver Elphick) +
Require Autoconf version 2.53 (Peter) +
Require readline and zlib by default in configure (Peter) +
Allow Solaris to use Intimate Shared Memory (ISM), for performance (Scott Brunza, P.J. Josh Rovero) +
Always enable syslog in compile, remove --enable-syslog option (Tatsuo) +
Always enable multibyte in compile, remove --enable-multibyte option (Tatsuo) +
Always enable locale in compile, remove --enable-locale option (Peter) +
Fix for Win9x DLL creation (Magnus Naeslund) +
Fix for link() usage by WAL code on Windows, BeOS (Jason Tishler) +
Add sys/types.h to c.h, remove from main files (Peter, Bruce) +
Fix AIX hang on SMP machines (Tomoyuki Niijima) +
AIX SMP hang fix (Tomoyuki Niijima) +
Fix pre-1970 date handling on newer glibc libraries (Tom) +
Fix PowerPC SMP locking (Tom) +
Prevent gcc -ffast-math from being used (Peter, Tom) +
Bison >= 1.50 now required for developer builds +
Kerberos 5 support now builds with Heimdal (Peter) +
Add appendix in the User's Guide which lists SQL features (Thomas) +
Improve loadable module linking to use RTLD_NOW (Tom) +
New error levels WARNING, INFO, LOG, DEBUG[1-5] (Bruce) +
New src/port directory holds replaced libc functions (Peter, Bruce) +
New pg_namespace system catalog for schemas (Tom) +
Add pg_class.relnamespace for schemas (Tom) +
Add pg_type.typnamespace for schemas (Tom) +
Add pg_proc.pronamespace for schemas (Tom) +
Restructure aggregates to have pg_proc entries (Tom) +
System relations now have their own namespace, pg_* test not required (Fernando Nasser) +
Rename TOAST index names to be *_index rather than *_idx (Neil) +
Add namespaces for operators, opclasses (Tom) +
Add additional checks to server control file (Thomas) +
New Polish FAQ (Marcin Mazurek) +
Add Posix semaphore support (Tom) +
Document need for reindex (Bruce) +
Rename some internal identifiers to simplify Windows compile (Jan, Katherine Ward) +
Add documentation on computing disk space (Bruce) +
Remove KSQO from GUC (Bruce) +
Fix memory leak in rtree (Kenneth Been) +
Modify a few error messages for consistency (Bruce) +
Remove unused system table columns (Peter) +
Make system columns NOT NULL where appropriate (Tom) +
Clean up use of sprintf in favor of snprintf() (Neil, Jukka Holappa) +
Remove OPAQUE and create specific subtypes (Tom) +
Cleanups in array internal handling (Joe, Tom) +
Disallow pg_atoi('') (Bruce) +
Remove parameter wal_files because WAL files are now recycled (Bruce) +
Add version numbers to heap pages (Tom) +
+
+
+
+
Contrib
+
+
Allow inet arrays in /contrib/array (Neil) +
GiST fixes (Teodor Sigaev, Neil) +
Add /contrib/dbsize which shows table sizes without vacuum (Peter) +
Add /contrib/intagg, integer aggregator routines (mlw) +
Improve /contrib/oid2name (Neil, Bruce) +
Improve /contrib/tsearch (Oleg, Teodor Sigaev) +
Cleanups of /contrib/rserver (Alexey V. Borzov) +
Update /contrib/oracle conversion utility (Gilles Darold) +
Update /contrib/dblink (Joe) +
Improve options supported by /contrib/vacuumlo (Mario Weilguni) +
Improvements to /contrib/intarray (Oleg, Teodor Sigaev, Andrey Oktyabrski) +
Add /contrib/reindexdb utility (Shaun Thomas) +
Add indexing to /contrib/isbn_issn (Dan Weston) +
Add /contrib/dbmirror (Steven Singer) +
Improve /contrib/pgbench (Neil) +
Add /contrib/tablefunc table function examples (Joe) +
Add /contrib/ltree data type for tree structures (Teodor Sigaev, Oleg Bartunov) +
Move /contrib/pg_controldata, pg_resetxlog into main tree (Bruce) +
Fixes to /contrib/cube (Bruno Wolff) +
Improve /contrib/fulltextindex (Christopher) +
+
+
+
+
+
+
+
Release 7.2.8
+
+
+
Release date
+ 2005-05-09
+
+
+ This release contains a variety of fixes from 7.2.7, including one
+ security-related issue.
+
+
+
+
Migration to Version 7.2.8
+
+ A dump/restore is not required for those running 7.2.X.
+
+
+
+
+
Changes
+
+
+
Repair ancient race condition that allowed a transaction to be +seen as committed for some purposes (eg SELECT FOR UPDATE) slightly sooner
+than for other purposes
+
This is an extremely serious bug since it could lead to apparent +data inconsistencies being briefly visible to applications.
+
Repair race condition between relation extension and +VACUUM
+
This could theoretically have caused loss of a page's worth of +freshly-inserted data, although the scenario seems of very low probability.
+There are no known cases of it having caused more than an Assert failure.
+
+TIME WITH TIME ZONE values
+
Additional buffer overrun checks in plpgsql +(Neil)
+
Fix pg_dump to dump index names and trigger names containing +% correctly (Neil)
+
Prevent to_char(interval) from dumping core for +month-related formats
+
Fix contrib/pgcrypto for newer OpenSSL builds +(Marko Kreen)
+
+
+
+
+
+
+
Release 7.2.7
+
+
+
Release date
+ 2005-01-31
+
+
+ This release contains a variety of fixes from 7.2.6, including several
+ security-related issues.
+
+
+
+
Migration to Version 7.2.7
+
+ A dump/restore is not required for those running 7.2.X.
+
+
+
+
+
Changes
+
+
+
Disallow LOAD to non-superusers +On platforms that will automatically execute initialization functions of a
+shared library (this includes at least Windows and ELF-based Unixen),
+LOAD can be used to make the server execute arbitrary code.
+Thanks to NGS Software for reporting this.
+
Add needed STRICT marking to some contrib functions (Kris +Jurka)
+
Avoid buffer overrun when plpgsql cursor declaration has too +many parameters (Neil)
+
Fix planning error for FULL and RIGHT outer joins +The result of the join was mistakenly supposed to be sorted the same as the
+left input. This could not only deliver mis-sorted output to the user, but
+in case of nested merge joins could give outright wrong answers.
+
+
Fix display of negative intervals in SQL and GERMAN +datestyles
+
+
+
+
+
+
+
Release 7.2.6
+
+
+
Release date
+ 2004-10-22
+
+
+ This release contains a variety of fixes from 7.2.5.
+
+
+
+
+
Migration to Version 7.2.6
+
+ A dump/restore is not required for those running 7.2.X.
+
+
+
+
+
Changes
+
+
+
Repair possible failure to update hint bits on disk +Under rare circumstances this oversight could lead to
+could not access transaction status failures, which qualifies
+it as a potential-data-loss bug.
+
+
Ensure that hashed outer join does not miss tuples +Very large left joins using a hash join plan could fail to output unmatched
+left-side rows given just the right data distribution.
+
+
Disallow running pg_ctl as root +This is to guard against any possible security issues.
+
+
Avoid using temp files in /tmp in make_oidjoins_check +This has been reported as a security issue, though it's hardly worthy of
+concern since there is no reason for non-developers to use this script anyway.
+
+
Update to newer versions of Bison +
+
+
+
+
+
+
Release 7.2.5
+
+
+
Release date
+ 2004-08-16
+
+
+ This release contains a variety of fixes from 7.2.4.
+
+
+
+
+
Migration to Version 7.2.5
+
+ A dump/restore is not required for those running 7.2.X.
+
+
+
+
+
Changes
+
+
+
Prevent possible loss of committed transactions during crash +Due to insufficient interlocking between transaction commit and checkpointing,
+it was possible for transactions committed just before the most recent
+checkpoint to be lost, in whole or in part, following a database crash and
+restart. This is a serious bug that has existed
+
+
Fix corner case for btree search in parallel with first root page split +
Fix buffer overrun in to_ascii (Guido Notari) +
Fix core dump in deadlock detection on machines where char is unsigned +
Fix failure to respond to pg_ctl stop -m fast after Async_NotifyHandler runs +
Repair memory leaks in pg_dump +
Avoid conflict with system definition of isblank() function or macro +
+
+
+
+
+
Release 7.2.4
+
+
+
Release date
+ 2003-01-30
+
+
+ This release contains a variety of fixes for version 7.2.3,
+ including fixes to prevent possible data loss.
+
+
+
+
Migration to Version 7.2.4
+
+ A dump/restore is not required for those
+ running version 7.2.*.
+
+
+
+
+
Changes
+
+
+
Fix some additional cases of VACUUM "No one parent tuple was found" error +
Prevent VACUUM from being called inside a function (Bruce) +
Ensure pg_clog updates are sync'd to disk before marking checkpoint complete +
Avoid integer overflow during large hash joins +
Make GROUP commands work when pg_group.grolist is large enough to be toasted +
Fix errors in datetime tables; some timezone names weren't being recognized +
Fix integer overflows in circle_poly(), path_encode(), path_add() (Neil) +
Repair long-standing logic errors in lseg_eq(), lseg_ne(), lseg_center() +
+
+
+
+
+
+
Release 7.2.3
+
+
+
Release date
+ 2002-10-01
+
+
+ This release contains a variety of fixes for version 7.2.2,
+ including fixes to prevent possible data loss.
+
+
+
+
Migration to Version 7.2.3
+
+ A dump/restore is not required for those
+ running version 7.2.*.
+
+
+
+
+
Changes
+
+
+
Prevent possible compressed transaction log loss (Tom) +
Prevent non-superuser from increasing most recent vacuum info (Tom) +
Handle pre-1970 date values in newer versions of glibc (Tom) +
Fix possible hang during server shutdown +
Prevent spinlock hangs on SMP PPC machines (Tomoyuki Niijima) +
Fix pg_dump to properly dump FULL JOIN USING (Tom) +
+
+
+
+
+
+
Release 7.2.2
+
+
+
Release date
+ 2002-08-23
+
+
+ This release contains a variety of fixes for version 7.2.1.
+
+
+
+
Migration to Version 7.2.2
+
+ A dump/restore is not required for those
+ running version 7.2.*.
+
+
+
+
+
Changes
+
+
+
Allow EXECUTE of "CREATE TABLE AS ... SELECT" in PL/pgSQL (Tom) +
Fix for compressed transaction log id wraparound (Tom) +
Fix PQescapeBytea/PQunescapeBytea so that they handle bytes > 0x7f (Tatsuo) +
Fix for psql and pg_dump crashing when invoked with non-existent long options (Tatsuo) +
Fix crash when invoking geometric operators (Tom) +
Allow OPEN cursor(args) (Tom) +
Fix for rtree_gist index build (Teodor) +
Fix for dumping user-defined aggregates (Tom) +
contrib/intarray fixes (Oleg) +
Fix for complex UNION/EXCEPT/INTERSECT queries using parens (Tom) +
Fix to pg_convert (Tatsuo) +
Fix for crash with long DATA strings (Thomas, Neil) +
Fix for repeat(), lpad(), rpad() and long strings (Neil) +
+
+
+
+
+
+
Release 7.2.1
+
+
+
Release date
+ 2002-03-21
+
+
+ This release contains a variety of fixes for version 7.2.
+
+
+
+
Migration to Version 7.2.1
+
+ A dump/restore is not required for those
+ running version 7.2.
+
+
+
+
+
Changes
+
+
+
Ensure that sequence counters do not go backwards after a crash (Tom) +
Fix pgaccess kanji-conversion key binding (Tatsuo) +
Optimizer improvements (Tom) +
Cash I/O improvements (Tom) +
Compile fix for missing AuthBlockSig (Heiko) +
Additional time zones and time zone fixes (Thomas) +
Allow psql \connect to handle mixed case database and user names (Tom) +
Return proper OID on command completion even with ON INSERT rules (Tom) +
Allow COPY FROM to use 8-bit DELIMITERS (Tatsuo) +
Fix bug in extract/date_part for milliseconds/microseconds (Tatsuo) +
Improve handling of multiple UNIONs with different lengths (Tom) +
contrib/btree_gist improvements (Teodor Sigaev) +
contrib/tsearch dictionary improvements, see README.tsearch for an additional installation step (Thomas T. Thai, Teodor Sigaev) +
Fix for array subscripts handling (Tom) +
Allow EXECUTE of "CREATE TABLE AS ... SELECT" in PL/pgSQL (Tom) +
+
+
+
+
+
+
Release 7.2
+
+
+
Release date
+ 2002-02-04
+
+
+
+
Overview
+
+ This release improves
PostgreSQL for use in + high-volume applications.
+
+
+ Major changes in this release:
+
+
+
+
+ VACUUM
+
+ Vacuuming no longer locks tables, thus allowing normal user
+ access during the vacuum. A new VACUUM FULL
+ command does old-style vacuum by locking the table and
+ shrinking the on-disk copy of the table.
+
+
+
+
+
+ Transactions
+
+ There is no longer a problem with installations that exceed
+ four billion transactions.
+
+
+
+
+
+ OIDs
+
+ OIDs are now optional. Users can now create tables without
+ OIDs for cases where OID usage is excessive.
+
+
+
+
+
+ Optimizer
+
+ The system now computes histogram column statistics during
+ ANALYZE, allowing much better optimizer choices.
+
+
+
+
+
+ Security
+
+ A new MD5 encryption option allows more secure storage and
+ transfer of passwords. A new Unix-domain socket
+ authentication option is available on Linux and BSD systems.
+
+
+
+
+
+ Statistics
+
+ Administrators can use the new table access statistics module
+ to get fine-grained information about table and index usage.
+
+
+
+
+
+ Internationalization
+
+ Program and library messages can now be displayed in several
+ languages.
+
+
+
+
+
+
+
+
+
Migration to Version 7.2
+
+ A dump/restore using pg_dump is required for
+ those wishing to migrate data from any previous release.
+
+
+ Observe the following incompatibilities:
+
+
+
+
+ The semantics of the VACUUM command have
+ changed in this release. You might wish to update your
+ maintenance procedures accordingly.
+
+
+
+
+ In this release, comparisons using = NULL
+ will always return false (or NULL, more precisely). Previous
+ releases automatically transformed this syntax to IS
+ NULL. The old behavior can be re-enabled using a
+ postgresql.conf parameter.
+
+
+
+
+ The pg_hba.conf and pg_ident.conf
+ configuration is now only reloaded after receiving a
+ SIGHUP signal, not with each connection.
+
+
+
+
+ The function octet_length() now returns the uncompressed data length.
+
+
+
+
+ The date/time value 'current' is no longer
+ available. You will need to rewrite your applications.
+
+
+
+
+ The timestamp() , time() ,
+ and interval() functions are no longer
+ available. Instead of timestamp() , use
+ timestamp 'string' or CAST .
+
+
+
+
+
+ The SELECT ... LIMIT #,# syntax will be removed
+ in the next release. You should change your queries to use
+ separate LIMIT and OFFSET clauses, e.g. LIMIT 10 OFFSET
+ 20.
+
+
+
+
+
Changes
+
+
+
Server Operation
+
+
Create temporary files in a separate directory (Bruce) +
Delete orphaned temporary files on postmaster startup (Bruce) +
Added unique indexes to some system tables (Tom) +
System table operator reorganization (Oleg Bartunov, Teodor Sigaev, Tom) +
Renamed pg_log to pg_clog (Tom) +
Enable SIGTERM, SIGQUIT to kill backends (Jan) +
Removed compile-time limit on number of backends (Tom) +
Better cleanup for semaphore resource failure (Tatsuo, Tom) +
Allow safe transaction ID wraparound (Tom) +
Removed OIDs from some system tables (Tom) +
Removed "triggered data change violation" error check (Tom) +
SPI portal creation of prepared/saved plans (Jan) +
Allow SPI column functions to work for system columns (Tom) +
Long value compression improvement (Tom) +
Statistics collector for table, index access (Jan) +
Truncate extra-long sequence names to a reasonable value (Tom) +
Measure transaction times in milliseconds (Thomas) +
Fix TID sequential scans (Hiroshi) +
Superuser ID now fixed at 1 (Peter E) +
New pg_ctl "reload" option (Tom) +
+
+
+
+
Performance
+
+
Optimizer improvements (Tom) +
New histogram column statistics for optimizer (Tom) +
Reuse write-ahead log files rather than discarding them (Tom) +
Cache improvements (Tom) +
IS NULL, IS NOT NULL optimizer improvement (Tom) +
Improve lock manager to reduce lock contention (Tom) +
Keep relcache entries for index access support functions (Tom) +
Allow better selectivity with NaN and infinities in NUMERIC (Tom) +
R-tree performance improvements (Kenneth Been) +
B-tree splits more efficient (Tom) +
+
+
+
+
Privileges
+
+
Change UPDATE, DELETE privileges to be distinct (Peter E) +
New REFERENCES, TRIGGER privileges (Peter E) +
Allow GRANT/REVOKE to/from more than one user at a time (Peter E) +
New has_table_privilege() function (Joe Conway) +
Allow non-superuser to vacuum database (Tom) +
New SET SESSION AUTHORIZATION command (Peter E) +
Fix bug in privilege modifications on newly created tables (Tom) +
Disallow access to pg_statistic for non-superuser, add user-accessible views (Tom) +
+
+
+
+
Client Authentication
+
+
Fork postmaster before doing authentication to prevent hangs (Peter E) +
Add ident authentication over Unix domain sockets on Linux, *BSD (Helge Bahmann, Oliver Elphick, Teodor Sigaev, Bruce) +
Add a password authentication method that uses MD5 encryption (Bruce) +
Allow encryption of stored passwords using MD5 (Bruce) +
PAM authentication (Dominic J. Eidson) +
Load pg_hba.conf and pg_ident.conf only on startup and SIGHUP (Bruce) +
+
+
+
+
Server Configuration
+
+
Interpretation of some time zone abbreviations as Australian rather than North American now settable at run time (Bruce) +
New parameter to set default transaction isolation level (Peter E) +
New parameter to enable conversion of "expr = NULL" into "expr IS NULL", off by default (Peter E) +
New parameter to control memory usage by VACUUM (Tom) +
New parameter to set client authentication timeout (Tom) +
New parameter to set maximum number of open files (Tom) +
+
+
+
+
Queries
+
+
Statements added by INSERT rules now execute after the INSERT (Jan) +
Prevent unadorned relation names in target list (Bruce) +
NULLs now sort after all normal values in ORDER BY (Tom) +
New IS UNKNOWN, IS NOT UNKNOWN Boolean tests (Tom) +
New SHARE UPDATE EXCLUSIVE lock mode (Tom) +
New EXPLAIN ANALYZE command that shows run times and row counts (Martijn van Oosterhout) +
Fix problem with LIMIT and subqueries (Tom) +
Fix for LIMIT, DISTINCT ON pushed into subqueries (Tom) +
Fix nested EXCEPT/INTERSECT (Tom) +
+
+
+
+
Schema Manipulation
+
+
Fix SERIAL in temporary tables (Bruce) +
Allow temporary sequences (Bruce) +
Sequences now use int8 internally (Tom) +
New SERIAL8 creates int8 columns with sequences, default still SERIAL4 (Tom) +
Make OIDs optional using WITHOUT OIDS (Tom) +
Add %TYPE syntax to CREATE TYPE (Ian Lance Taylor) +
Add ALTER TABLE / DROP CONSTRAINT for CHECK constraints (Christopher Kings-Lynne) +
New CREATE OR REPLACE FUNCTION to alter existing function (preserving the function OID) (Gavin Sherry) +
Add ALTER TABLE / ADD [ UNIQUE | PRIMARY ] (Christopher Kings-Lynne) +
Allow column renaming in views +
Make ALTER TABLE / RENAME COLUMN update column names of indexes (Brent Verner) +
Fix for ALTER TABLE / ADD CONSTRAINT ... CHECK with inherited tables (Stephan Szabo) +
ALTER TABLE RENAME update foreign-key trigger arguments correctly (Brent Verner) +
DROP AGGREGATE and COMMENT ON AGGREGATE now accept an aggtype (Tom) +
Add automatic return type data casting for SQL functions (Tom) +
Allow GiST indexes to handle NULLs and multikey indexes (Oleg Bartunov, Teodor Sigaev, Tom) +
Enable partial indexes (Martijn van Oosterhout) +
+
+
+
+
Utility Commands
+
+
Add RESET ALL, SHOW ALL (Marko Kreen) +
CREATE/ALTER USER/GROUP now allow options in any order (Vince) +
Add LOCK A, B, C functionality (Neil Padgett) +
New ENCRYPTED/UNENCRYPTED option to CREATE/ALTER USER (Bruce) +
New light-weight VACUUM does not lock table; old semantics are available as VACUUM FULL (Tom) +
Disable COPY TO/FROM on views (Bruce) +
COPY DELIMITERS string must be exactly one character (Tom) +
VACUUM warning about index tuples fewer than heap now only appears when appropriate (Martijn van Oosterhout) +
Fix privilege checks for CREATE INDEX (Tom) +
Disallow inappropriate use of CREATE/DROP INDEX/TRIGGER/VIEW (Tom) +
+
+
+
+
Data Types and Functions
+
+
SUM(), AVG(), COUNT() now uses int8 internally for speed (Tom) +
Add convert(), convert2() (Tatsuo) +
New function bit_length() (Peter E) +
Make the "n" in CHAR(n)/VARCHAR(n) represents letters, not bytes (Tatsuo) +
CHAR(), VARCHAR() now reject strings that are too long (Peter E) +
BIT VARYING now rejects bit strings that are too long (Peter E) +
BIT now rejects bit strings that do not match declared size (Peter E) +
INET, CIDR text conversion functions (Alex Pilosov) +
INET, CIDR operators << and <<= indexable (Alex Pilosov) +
Bytea \### now requires valid three digit octal number +
Bytea comparison improvements, now supports =, <>, >, >=, <, and <= +
Bytea now supports B-tree indexes +
Bytea now supports LIKE, LIKE...ESCAPE, NOT LIKE, NOT LIKE...ESCAPE +
Bytea now supports concatenation +
New bytea functions: position, substring, trim, btrim, and length +
New encode() function mode, "escaped", converts minimally escaped bytea to/from text +
Add pg_database_encoding_max_length() (Tatsuo) +
Add pg_client_encoding() function (Tatsuo) +
now() returns time with millisecond precision (Thomas) +
New TIMESTAMP WITHOUT TIMEZONE data type (Thomas) +
Add ISO date/time specification with "T", yyyy-mm-ddThh:mm:ss (Thomas) +
New xid/int comparison functions (Hiroshi) +
Add precision to TIME, TIMESTAMP, and INTERVAL data types (Thomas) +
Modify type coercion logic to attempt binary-compatible functions first (Tom) +
New encode() function installed by default (Marko Kreen) +
Improved to_*() conversion functions (Karel Zak) +
Optimize LIKE/ILIKE when using single-byte encodings (Tatsuo) +
New functions in contrib/pgcrypto: crypt(), hmac(), encrypt(), gen_salt() (Marko Kreen) +
Correct description of translate() function (Bruce) +
Add INTERVAL argument for SET TIME ZONE (Thomas) +
Add INTERVAL YEAR TO MONTH (etc.) syntax (Thomas) +
Optimize length functions when using single-byte encodings (Tatsuo) +
Fix path_inter, path_distance, path_length, dist_ppath to handle closed paths (Curtis Barrett, Tom) +
octet_length(text) now returns non-compressed length (Tatsuo, Bruce) +
Handle "July" full name in date/time literals (Greg Sabino Mullane) +
Some datatype() function calls now evaluated differently +
Add support for Julian and ISO time specifications (Thomas) +
+
+
+
+
Internationalization
+
+
National language support in psql, pg_dump, libpq, and server (Peter E) +
Message translations in Chinese (simplified, traditional), Czech, French, German, Hungarian, Russian, Swedish (Peter E, Serguei A. Mokhov, Karel Zak, Weiping He, Zhenbang Wei, Kovacs Zoltan) +
Make trim, ltrim, rtrim, btrim, lpad, rpad, translate multibyte aware (Tatsuo) +
Add LATIN5,6,7,8,9,10 support (Tatsuo) +
Add ISO 8859-5,6,7,8 support (Tatsuo) +
Correct LATIN5 to mean ISO-8859-9, not ISO-8859-5 (Tatsuo) +
Make mic2ascii() non-ASCII aware (Tatsuo) +
Reject invalid multibyte character sequences (Tatsuo) +
+
+
+
+
<application>PL/pgSQL</>
+
+
Now uses portals for SELECT loops, allowing huge result sets (Jan) +
CURSOR and REFCURSOR support (Jan) +
Can now return open cursors (Jan) +
Add ELSEIF (Klaus Reger) +
Improve PL/pgSQL error reporting, including location of error (Tom) +
Allow IS or FOR key words in cursor declaration, for compatibility (Bruce) +
Fix for SELECT ... FOR UPDATE (Tom) +
Fix for PERFORM returning multiple rows (Tom) +
Make PL/pgSQL use the server's type coercion code (Tom) +
Memory leak fix (Jan, Tom) +
Make trailing semicolon optional (Tom) +
+
+
+
+
PL/Perl
+
+
New untrusted PL/Perl (Alex Pilosov) +
PL/Perl is now built on some platforms even if libperl is not shared (Peter E) +
+
+
+
+
PL/Tcl
+
+
Now reports errorInfo (Vsevolod Lobko) +
+
+
+
+
PL/Python
+
+
...is new (Andrew Bosma) +
+
+
+
+
<application>psql</>
+
+
\d displays indexes in unique, primary groupings (Christopher Kings-Lynne) +
Allow trailing semicolons in backslash commands (Greg Sabino Mullane) +
Read password from /dev/tty if possible +
Force new password prompt when changing user and database (Tatsuo, Tom) +
Format the correct number of columns for Unicode (Patrice) +
+
+
+
+
<application>libpq</>
+
+
New function PQescapeString() to escape quotes in command strings (Florian Weimer) +
New function PQescapeBytea() escapes binary strings for use as SQL string literals +
+
+
+
+
JDBC
+
+
Return OID of INSERT (Ken K) +
Handle more data types (Ken K) +
Handle single quotes and newlines in strings (Ken K) +
Handle NULL variables (Ken K) +
Fix for time zone handling (Barry Lind) +
Allow eight-bit characters with non-multibyte server (Barry Lind) +
Support BIT, BINARY types (Ned Wolpert) +
Reduce memory usage (Michael Stephens, Dave Cramer) +
Update DatabaseMetaData (Peter E) +
Add DatabaseMetaData.getCatalogs() (Peter E) +
Encoding fixes (Anders Bengtsson) +
Get/setCatalog methods (Jason Davies) +
DatabaseMetaData.getColumns() now returns column defaults (Jason Davies) +
DatabaseMetaData.getColumns() performance improvement (Jeroen van Vianen) +
Some JDBC1 and JDBC2 merging (Anders Bengtsson) +
Transaction performance improvements (Barry Lind) +
Array fixes (Greg Zoller) +
Fix batch processing (Rene Pijlman) +
ExecSQL method reorganization (Anders Bengtsson) +
GetColumn() fixes (Jeroen van Vianen) +
Fix isWriteable() function (Rene Pijlman) +
Improved passage of JDBC2 conformance tests (Rene Pijlman) +
Add bytea type capability (Barry Lind) +
Add isNullable() (Rene Pijlman) +
JDBC date/time test suite fixes (Liam Stewart) +
Fix for SELECT 'id' AS xxx FROM table (Dave Cramer) +
Fix DatabaseMetaData to show precision properly (Mark Lillywhite) +
New getImported/getExported keys (Jason Davies) +
MD5 password encryption support (Jeremy Wohl) +
Fix to actually use type cache (Ned Wolpert) +
+
+
+
+
ODBC
+
+
Remove query size limit (Hiroshi) +
Remove text field size limit (Hiroshi) +
Fix for SQLPrimaryKeys in multibyte mode (Hiroshi) +
Allow ODBC procedure calls (Hiroshi) +
Improve boolean handing (Aidan Mountford) +
Most configuration options now settable via DSN (Hiroshi) +
Multibyte, performance fixes (Hiroshi) +
Allow driver to be used with iODBC or unixODBC (Peter E) +
MD5 password encryption support (Bruce) +
Add more compatibility functions to odbc.sql (Peter E) +
+
+
+
+
<application>ECPG</>
+
+
EXECUTE ... INTO implemented (Christof Petig) +
Multiple row descriptor support (e.g. CARDINALITY) (Christof Petig) +
Fix for GRANT parameters (Lee Kindness) +
Fix INITIALLY DEFERRED bug +
Various bug fixes (Michael, Christof Petig) +
Auto allocation for indicator variable arrays (int *ind_p=NULL) +
Auto allocation for string arrays (char **foo_pp=NULL) +
All function names with external linkage are now prefixed by ECPG +
Fixes for arrays of structures (Michael) +
+
+
+
+
Misc. Interfaces
+
+
Python fix fetchone() (Gerhard Haring) +
Use UTF, Unicode in Tcl where appropriate (Vsevolod Lobko, Reinhard Max) +
Add Tcl COPY TO/FROM (ljb) +
Prevent output of default index op class in pg_dump (Tom) +
Fix libpgeasy memory leak (Bruce) +
+
+
+
+
Build and Install
+
+
Configure, dynamic loader, and shared library fixes (Peter E) +
Fixes in QNX 4 port (Bernd Tegge) +
Fixes in Cygwin and Windows ports (Jason Tishler, Gerhard Haring, Dmitry Yurtaev, Darko Prenosil, Mikhail Terekhov) +
Fix for Windows socket communication failures (Magnus, Mikhail Terekhov) +
Hurd compile fix (Oliver Elphick) +
BeOS fixes (Cyril Velter) +
Remove configure --enable-unicode-conversion, now enabled by multibyte (Tatsuo) +
AIX fixes (Tatsuo, Andreas) +
Fix parallel make (Peter E) +
Install SQL language manual pages into OS-specific directories (Peter E) +
Rename config.h to pg_config.h (Peter E) +
Reorganize installation layout of header files (Peter E) +
+
+
+
+
Source Code
+
+
Merge GUC and command line handling (Marko Kreen) +
Remove EXTEND INDEX (Martijn van Oosterhout, Tom) +
New pgjindent utility to indent java code (Bruce) +
Remove define of true/false when compiling under C++ (Leandro Fanzone, Tom) +
pgindent fixes (Bruce, Tom) +
Replace strcasecmp() with strcmp() where appropriate (Peter E) +
Dynahash portability improvements (Tom) +
Add 'volatile' usage in spinlock structures +
Improve signal handling logic (Tom) +
+
+
+
+
Contrib
+
+
New contrib/rtree_gist (Oleg Bartunov, Teodor Sigaev) +
New contrib/tsearch full-text indexing (Oleg, Teodor Sigaev) +
Add contrib/dblink for remote database access (Joe Conway) +
contrib/ora2pg Oracle conversion utility (Gilles Darold) +
contrib/xml XML conversion utility (John Gray) +
contrib/fulltextindex fixes (Christopher Kings-Lynne) +
New contrib/fuzzystrmatch with levenshtein and metaphone, soundex merged (Joe Conway) +
Add contrib/intarray boolean queries, binary search, fixes (Oleg Bartunov) +
New pg_upgrade utility (Bruce) +
Add new pg_resetxlog options (Bruce, Tom) +
+
+
+
+
+
+
+
Release 7.1.3
+
+
+
Release date
+ 2001-08-15
+
+
+
+
Migration to Version 7.1.3
+
+ A dump/restore is not required for those running
+ 7.1.X.
+
+
+
+
+
Changes
+
+Remove unused WAL segments of large transactions (Tom)
+Multiaction rule fix (Tom)
+PL/pgSQL memory allocation fix (Jan)
+VACUUM buffer fix (Tom)
+Regression test fixes (Tom)
+pg_dump fixes for GRANT/REVOKE/comments on views, user-defined types (Tom)
+Fix subselects with DISTINCT ON or LIMIT (Tom)
+BeOS fix
+Disable COPY TO/FROM a view (Tom)
+Cygwin build (Jason Tishler)
+
+
+
+
+
+
+
+
Release 7.1.2
+
+
+
Release date
+ 2001-05-11
+
+
+ This has one fix from 7.1.1.
+
+
+
+
+
Migration to Version 7.1.2
+
+ A dump/restore is not required for those running
+ 7.1.X.
+
+
+
+
+
Changes
+
+Fix PL/pgSQL SELECTs when returning no rows
+Fix for psql backslash core dump
+Referential integrity privilege fix
+Optimizer fixes
+pg_dump cleanups
+
+
+
+
+
+
+
+
Release 7.1.1
+
+
+
Release date
+ 2001-05-05
+
+
+ This has a variety of fixes from 7.1.
+
+
+
+
+
Migration to Version 7.1.1
+
+ A dump/restore is not required for those running
+ 7.1.
+
+
+
+
+
Changes
+
+Fix for numeric MODULO operator (Tom)
+pg_dump fixes (Philip)
+pg_dump can dump 7.0 databases (Philip)
+readline 4.2 fixes (Peter E)
+JOIN fixes (Tom)
+AIX, MSWIN, VAX, N32K fixes (Tom)
+Multibytes fixes (Tom)
+Unicode fixes (Tatsuo)
+Optimizer improvements (Tom)
+Fix for whole rows in functions (Tom)
+Fix for pg_ctl and option strings with spaces (Peter E)
+ODBC fixes (Hiroshi)
+EXTRACT can now take string argument (Thomas)
+Python fixes (Darcy)
+
+
+
+
+
+
+
+
Release 7.1
+
+
+
Release date
+ 2001-04-13
+
+
+ This release focuses on removing limitations that have existed in the
+
PostgreSQL code for many years.
+
+
+ Major changes in this release:
+
+
+
+
+
+ Write-ahead Log (WAL)
+
+
+To maintain database consistency in case of an operating system crash,
+previous releases of
PostgreSQL have forced
+all data modifications to disk before each transaction commit. With
+WAL, only one log file must be flushed to disk, greatly improving
+performance. If you have been using -F in previous releases to
+disable disk flushes, you might want to consider discontinuing its use.
+
+
+
+
+
+
+ TOAST
+
+
+ TOAST - Previous releases had a compiled-in row length limit,
+typically 8k - 32k. This limit made storage of long text fields
+difficult. With TOAST, long rows of any length can be stored with good
+performance.
+
+
+
+
+
+
+ Outer Joins
+
+
+We now support outer joins. The UNION/NOT IN
+workaround for outer joins is no longer required. We use the SQL92
+outer join syntax.
+
+
+
+
+
+
+ Function Manager
+
+
+The previous C function manager did not
+handle null values properly, nor did it support 64-bit
CPU 's (Alpha). The new
+function manager does. You can continue using your old custom
+functions, but you might want to rewrite them in the future to use the new
+function manager call interface.
+
+
+
+
+
+
+ Complex Queries
+
+
+A large number of complex queries that were
+unsupported in previous releases now work. Many combinations of views,
+aggregates, UNION, LIMIT, cursors, subqueries, and inherited tables
+now work properly. Inherited tables are now accessed by default.
+Subqueries in FROM are now supported.
+
+
+
+
+
+
+
+
Migration to Version 7.1
+
+ A dump/restore using pg_dump is required for those wishing to migrate
+ data from any previous release.
+
+
+
+
+
Changes
+
+Bug Fixes
+---------
+Many multibyte/Unicode/locale fixes (Tatsuo and others)
+More reliable ALTER TABLE RENAME (Tom)
+Kerberos V fixes (David Wragg)
+Fix for INSERT INTO...SELECT where targetlist has subqueries (Tom)
+Prompt username/password on standard error (Bruce)
+Large objects inv_read/inv_write fixes (Tom)
+Fixes for to_char(), to_date(), to_ascii(), and to_timestamp() (Karel,
+ Daniel Baldoni)
+Prevent query expressions from leaking memory (Tom)
+Allow UPDATE of arrays elements (Tom)
+Wake up lock waiters during cancel (Hiroshi)
+Fix rare cursor crash when using hash join (Tom)
+Fix for DROP TABLE/INDEX in rolled-back transaction (Hiroshi)
+Fix psql crash from \l+ if MULTIBYTE enabled (Peter E)
+Fix truncation of rule names during CREATE VIEW (Ross Reedstrom)
+Fix PL/perl (Alex Kapranoff)
+Disallow LOCK on views (Mark Hollomon)
+Disallow INSERT/UPDATE/DELETE on views (Mark Hollomon)
+Disallow DROP RULE, CREATE INDEX, TRUNCATE on views (Mark Hollomon)
+Allow PL/pgSQL accept non-ASCII identifiers (Tatsuo)
+Allow views to proper handle GROUP BY, aggregates, DISTINCT (Tom)
+Fix rare failure with TRUNCATE command (Tom)
+Allow UNION/INTERSECT/EXCEPT to be used with ALL, subqueries, views,
+ DISTINCT, ORDER BY, SELECT...INTO (Tom)
+Fix parser failures during aborted transactions (Tom)
+Allow temporary relations to properly clean up indexes (Bruce)
+Fix VACUUM problem with moving rows in same page (Tom)
+Modify pg_dump to better handle user-defined items in template1 (Philip)
+Allow LIMIT in VIEW (Tom)
+Require cursor FETCH to honor LIMIT (Tom)
+Allow PRIMARY/FOREIGN Key definitions on inherited columns (Stephan)
+Allow ORDER BY, LIMIT in subqueries (Tom)
+Allow UNION in CREATE RULE (Tom)
+Make ALTER/DROP TABLE rollback-able (Vadim, Tom)
+Store initdb collation in pg_control so collation cannot be changed (Tom)
+Fix INSERT...SELECT with rules (Tom)
+Fix FOR UPDATE inside views and subselects (Tom)
+Fix OVERLAPS operators conform to SQL92 spec regarding NULLs (Tom)
+Fix lpad() and rpad() to handle length less than input string (Tom)
+Fix use of NOTIFY in some rules (Tom)
+Overhaul btree code (Tom)
+Fix NOT NULL use in Pl/pgSQL variables (Tom)
+Overhaul GIST code (Oleg)
+Fix CLUSTER to preserve constraints and column default (Tom)
+Improved deadlock detection handling (Tom)
+Allow multiple SERIAL columns in a table (Tom)
+Prevent occasional index corruption (Vadim)
+
+Enhancements
+------------
+Add OUTER JOINs (Tom)
+Function manager overhaul (Tom)
+Allow ALTER TABLE RENAME on indexes (Tom)
+Improve CLUSTER (Tom)
+Improve ps status display for more platforms (Peter E, Marc)
+Improve CREATE FUNCTION failure message (Ross)
+JDBC improvements (Peter, Travis Bauer, Christopher Cain, William Webber,
+ Gunnar)
+Grand Unified Configuration scheme/GUC. Many options can now be set in
+ data/postgresql.conf, postmaster/postgres flags, or SET commands (Peter E)
+Improved handling of file descriptor cache (Tom)
+New warning code about auto-created table alias entries (Bruce)
+Overhaul initdb process (Tom, Peter E)
+Overhaul of inherited tables; inherited tables now accessed by default;
+ new ONLY key word prevents it (Chris Bitmead, Tom)
+ODBC cleanups/improvements (Nick Gorham, Stephan Szabo, Zoltan Kovacs,
+ Michael Fork)
+Allow renaming of temp tables (Tom)
+Overhaul memory manager contexts (Tom)
+pg_dumpall uses CREATE USER or CREATE GROUP rather using COPY (Peter E)
+Overhaul pg_dump (Philip Warner)
+Allow pg_hba.conf secondary password file to specify only username (Peter E)
+Allow TEMPORARY or TEMP key word when creating temporary tables (Bruce)
+New memory leak checker (Karel)
+New SET SESSION CHARACTERISTICS (Thomas)
+Allow nested block comments (Thomas)
+Add WITHOUT TIME ZONE type qualifier (Thomas)
+New ALTER TABLE ADD CONSTRAINT (Stephan)
+Use NUMERIC accumulators for INTEGER aggregates (Tom)
+Overhaul aggregate code (Tom)
+New VARIANCE and STDDEV() aggregates
+Improve dependency ordering of pg_dump (Philip)
+New pg_restore command (Philip)
+New pg_dump tar output option (Philip)
+New pg_dump of large objects (Philip)
+New ESCAPE option to LIKE (Thomas)
+New case-insensitive LIKE - ILIKE (Thomas)
+Allow functional indexes to use binary-compatible type (Tom)
+Allow SQL functions to be used in more contexts (Tom)
+New pg_config utility (Peter E)
+New PL/pgSQL EXECUTE command which allows dynamic SQL and utility statements
+ (Jan)
+New PL/pgSQL GET DIAGNOSTICS statement for SPI value access (Jan)
+New quote_identifiers() and quote_literal() functions (Jan)
+New ALTER TABLE table OWNER TO user command (Mark Hollomon)
+Allow subselects in FROM, i.e. FROM (SELECT ...) [AS] alias (Tom)
+Update PyGreSQL to version 3.1 (D'Arcy)
+Store tables as files named by OID (Vadim)
+New SQL function setval(seq,val,bool) for use in pg_dump (Philip)
+Require DROP VIEW to remove views, no DROP TABLE (Mark)
+Allow DROP VIEW view1, view2 (Mark)
+Allow multiple objects in DROP INDEX, DROP RULE, and DROP TYPE (Tom)
+Allow automatic conversion to/from Unicode (Tatsuo, Eiji)
+New /contrib/pgcrypto hashing functions (Marko Kreen)
+New pg_dumpall --globals-only option (Peter E)
+New CHECKPOINT command for WAL which creates new WAL log file (Vadim)
+New AT TIME ZONE syntax (Thomas)
+Allow location of Unix domain socket to be configurable (David J. MacKenzie)
+Allow postmaster to listen on a specific IP address (David J. MacKenzie)
+Allow socket path name to be specified in hostname by using leading slash
+ (David J. MacKenzie)
+Allow CREATE DATABASE to specify template database (Tom)
+New utility to convert MySQL schema dumps to SQL92 and PostgreSQL (Thomas)
+New /contrib/rserv replication toolkit (Vadim)
+New file format for COPY BINARY (Tom)
+New /contrib/oid2name to map numeric files to table names (B Palmer)
+New "idle in transaction" ps status message (Marc)
+Update to pgaccess 0.98.7 (Constantin Teodorescu)
+pg_ctl now defaults to -w (wait) on shutdown, new -l (log) option
+Add rudimentary dependency checking to pg_dump (Philip)
+
+Types
+-----
+Fix INET/CIDR type ordering and add new functions (Tom)
+Make OID behave as an unsigned type (Tom)
+Allow BIGINT as synonym for INT8 (Peter E)
+New int2 and int8 comparison operators (Tom)
+New BIT and BIT VARYING types (Adriaan Joubert, Tom, Peter E)
+CHAR() no longer faster than VARCHAR() because of TOAST (Tom)
+New GIST seg/cube examples (Gene Selkov)
+Improved round(numeric) handling (Tom)
+Fix CIDR output formatting (Tom)
+New CIDR abbrev() function (Tom)
+
+Performance
+-----------
+Write-Ahead Log (WAL) to provide crash recovery with less performance
+ overhead (Vadim)
+ANALYZE stage of VACUUM no longer exclusively locks table (Bruce)
+Reduced file seeks (Denis Perchine)
+Improve BTREE code for duplicate keys (Tom)
+Store all large objects in a single table (Denis Perchine, Tom)
+Improve memory allocation performance (Karel, Tom)
+
+Source Code
+-----------
+New function manager call conventions (Tom)
+SGI portability fixes (David Kaelbling)
+New configure --enable-syslog option (Peter E)
+New BSDI README (Bruce)
+configure script moved to top level, not /src (Peter E)
+Makefile/configuration/compilation overhaul (Peter E)
+New configure --with-python option (Peter E)
+Solaris cleanups (Peter E)
+Overhaul /contrib Makefiles (Karel)
+New OpenSSL configuration option (Magnus, Peter E)
+AIX fixes (Andreas)
+QNX fixes (Maurizio)
+New heap_open(), heap_openr() API (Tom)
+Remove colon and semi-colon operators (Thomas)
+New pg_class.relkind value for views (Mark Hollomon)
+Rename ichar() to chr() (Karel)
+New documentation for btrim(), ascii(), chr(), repeat() (Karel)
+Fixes for NT/Cygwin (Pete Forman)
+AIX port fixes (Andreas)
+New BeOS port (David Reid, Cyril Velter)
+Add proofreader's changes to docs (Addison-Wesley, Bruce)
+New Alpha spinlock code (Adriaan Joubert, Compaq)
+UnixWare port overhaul (Peter E)
+New Darwin/MacOS X port (Peter Bierman, Bruce Hartzler)
+New FreeBSD Alpha port (Alfred)
+Overhaul shared memory segments (Tom)
+Add IBM S/390 support (Neale Ferguson)
+Moved macmanuf to /contrib (Larry Rosenman)
+Syslog improvements (Larry Rosenman)
+New template0 database that contains no user additions (Tom)
+New /contrib/cube and /contrib/seg GIST sample code (Gene Selkov)
+Allow NetBSD's libedit instead of readline (Peter)
+Improved assembly language source code format (Bruce)
+New contrib/pg_logger
+New --template option to createdb
+New contrib/pg_control utility (Oliver)
+New FreeBSD tools ipc_check, start-scripts/freebsd
+
+
+
+
+
+
+
+
Release 7.0.3
+
+
+
Release date
+ 2000-11-11
+
+
+ This has a variety of fixes from 7.0.2.
+
+
+
+
+
Migration to Version 7.0.3
+
+ A dump/restore is not required for those running
+ 7.0.*.
+
+
+
+
+
Changes
+
+Jdbc fixes (Peter)
+Large object fix (Tom)
+Fix lean in COPY WITH OIDS leak (Tom)
+Fix backwards-index-scan (Tom)
+Fix SELECT ... FOR UPDATE so it checks for duplicate keys (Hiroshi)
+Add --enable-syslog to configure (Marc)
+Fix abort transaction at backend exit in rare cases (Tom)
+Fix for psql \l+ when multibyte enabled (Tatsuo)
+Allow PL/pgSQL to accept non ascii identifiers (Tatsuo)
+Make vacuum always flush buffers (Tom)
+Fix to allow cancel while waiting for a lock (Hiroshi)
+Fix for memory allocation problem in user authentication code (Tom)
+Remove bogus use of int4out() (Tom)
+Fixes for multiple subqueries in COALESCE or BETWEEN (Tom)
+Fix for failure of triggers on heap open in certain cases (Jeroen van
+ Vianen)
+Fix for erroneous selectivity of not-equals (Tom)
+Fix for erroneous use of strcmp() (Tom)
+Fix for bug where storage manager accesses items beyond end of file
+ (Tom)
+Fix to include kernel errno message in all smgr elog messages (Tom)
+Fix for '.' not in PATH at build time (SL Baur)
+Fix for out-of-file-descriptors error (Tom)
+Fix to make pg_dump dump 'iscachable' flag for functions (Tom)
+Fix for subselect in targetlist of Append node (Tom)
+Fix for mergejoin plans (Tom)
+Fix TRUNCATE failure on relations with indexes (Tom)
+Avoid database-wide restart on write error (Hiroshi)
+Fix nodeMaterial to honor chgParam by recomputing its output (Tom)
+Fix VACUUM problem with moving chain of update row versions when source
+ and destination of a row version lie on the same page (Tom)
+Fix user.c CommandCounterIncrement (Tom)
+Fix for AM/PM boundary problem in to_char() (Karel Zak)
+Fix TIME aggregate handling (Tom)
+Fix to_char() to avoid coredump on NULL input (Tom)
+Buffer fix (Tom)
+Fix for inserting/copying longer multibyte strings into char() data
+ types (Tatsuo)
+Fix for crash of backend, on abort (Tom)
+
+
+
+
+
+
+
+
Release 7.0.2
+
+
+
Release date
+ 2000-06-05
+
+
+ This is a repackaging of 7.0.1 with added documentation.
+
+
+
+
+
Migration to Version 7.0.2
+
+ A dump/restore is not required for those running
+ 7.*.
+
+
+
+
+
Changes
+
+Added documentation to tarball.
+
+
+
+
+
+
+
+
Release 7.0.1
+
+
+
Release date
+ 2000-06-01
+
+
+ This is a cleanup release for 7.0.
+
+
+
+
Migration to Version 7.0.1
+
+ A dump/restore is not required for those running
+ 7.0.
+
+
+
+
+
Changes
+
+Fix many CLUSTER failures (Tom)
+Allow ALTER TABLE RENAME works on indexes (Tom)
+Fix plpgsql to handle datetime->timestamp and timespan->interval (Bruce)
+New configure --with-setproctitle switch to use setproctitle() (Marc, Bruce)
+Fix the off by one errors in ResultSet from 6.5.3, and more.
+jdbc ResultSet fixes (Joseph Shraibman)
+optimizer tunings (Tom)
+Fix create user for pgaccess
+Fix for UNLISTEN failure
+IRIX fixes (David Kaelbling)
+QNX fixes (Andreas Kardos)
+Reduce COPY IN lock level (Tom)
+Change libpqeasy to use PQconnectdb() style parameters (Bruce)
+Fix pg_dump to handle OID indexes (Tom)
+Fix small memory leak (Tom)
+Solaris fix for createdb/dropdb (Tatsuo)
+Fix for non-blocking connections (Alfred Perlstein)
+Fix improper recovery after RENAME TABLE failures (Tom)
+Copy pg_ident.conf.sample into /lib directory in install (Bruce)
+Add SJIS UDC (NEC selection IBM kanji) support (Eiji Tokuya)
+Fix too long syslog message (Tatsuo)
+Fix problem with quoted indexes that are too long (Tom)
+JDBC ResultSet.getTimestamp() fix (Gregory Krasnow & Floyd Marinescu)
+ecpg changes (Michael)
+
+
+
+
+
+
+
Release 7.0
+
+
+
Release date
+ 2000-05-08
+
+
+ This release contains improvements in many areas, demonstrating
+ the continued growth of
PostgreSQL .
+ There are more improvements and fixes in 7.0 than in any previous
+ release. The developers have confidence that this is the best
+ release yet; we do our best to put out only solid releases, and
+ this one is no exception.
+
+
+ Major changes in this release:
+
+
+
+
+
+ Foreign Keys
+
+
+ Foreign keys are now implemented, with the exception of PARTIAL MATCH
+ foreign keys. Many users have been asking for this feature, and we are
+ pleased to offer it.
+
+
+
+
+
+
+ Optimizer Overhaul
+
+
+ Continuing on work started a year ago, the optimizer has been
+ improved, allowing better query plan selection and faster performance
+ with less memory usage.
+
+
+
+
+
+
+
+
+
psql , our interactive terminal monitor, has been
+ updated with a variety of new features. See the
psql manual page for details.
+
+
+
+
+
+
+ Join Syntax
+
+
+ SQL92 join syntax is now supported, though only as
+ INNER JOIN for this release. JOIN,
+ NATURAL JOIN, JOIN/USING,
+ and JOIN/ON are available, as are
+ column correlation names.
+
+
+
+
+
+
+
+
Migration to Version 7.0
+
+ A dump/restore using
pg_dump + is required for those wishing to migrate data from any
+ previous release of
PostgreSQL .
+ For those upgrading from 6.5.*, you can instead use
+
pg_upgrade to upgrade to this
+ release; however, a full dump/reload installation is always the
+ most robust method for upgrades.
+
+
+ Interface and compatibility issues to consider for the new
+ release include:
+
+
+
+
+ The date/time types datetime and
+ timespan have been superseded by the
+ SQL92-defined types timestamp and
+ interval . Although there has been some effort to
+ ease the transition by allowing
+
PostgreSQL to recognize
+ the deprecated type names and translate them to the new type
+ names, this mechanism cannot be completely transparent to
+ your existing application.
+
+
+
+
+ The optimizer has been substantially improved in the area of
+ query cost estimation. In some cases, this will result in
+ decreased query times as the optimizer makes a better choice
+ for the preferred plan. However, in a small number of cases,
+ usually involving pathological distributions of data, your
+ query times might go up. If you are dealing with large amounts
+ of data, you might want to check your queries to verify
+ performance.
+
+
+
+
+ interfaces have been upgraded and extended.
+
+
+
+
+ The string function CHAR_LENGTH is now a
+ native function. Previous versions translated this into a call
+ to LENGTH , which could result in
+ ambiguity with other types implementing
+ LENGTH such as the geometric types.
+
+
+
+
+
+
+
Changes
+
+Bug Fixes
+---------
+Prevent function calls exceeding maximum number of arguments (Tom)
+Improve CASE construct (Tom)
+Fix SELECT coalesce(f1,0) FROM int4_tbl GROUP BY f1 (Tom)
+Fix SELECT sentence.words[0] FROM sentence GROUP BY sentence.words[0] (Tom)
+Fix GROUP BY scan bug (Tom)
+Improvements in SQL grammar processing (Tom)
+Fix for views involved in INSERT ... SELECT ... (Tom)
+Fix for SELECT a/2, a/2 FROM test_missing_target GROUP BY a/2 (Tom)
+Fix for subselects in INSERT ... SELECT (Tom)
+Prevent INSERT ... SELECT ... ORDER BY (Tom)
+Fixes for relations greater than 2GB, including vacuum
+Improve propagating system table changes to other backends (Tom)
+Improve propagating user table changes to other backends (Tom)
+Fix handling of temp tables in complex situations (Bruce, Tom)
+Allow table locking at table open, improving concurrent reliability (Tom)
+Properly quote sequence names in pg_dump (Ross J. Reedstrom)
+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 for SELECT ... WHERE x IN (SELECT ... HAVING SUM(x) > 1) (Tom)
+Fix for "f1 datetime DEFAULT 'now'" (Tom)
+Fix problems with CURRENT_DATE used in DEFAULT (Tom)
+Allow comment-only lines, and ;;; lines too. (Tom)
+Improve recovery after failed disk writes, disk full (Hiroshi)
+Fix cases where table is mentioned in FROM but not joined (Tom)
+Allow HAVING clause without aggregate functions (Tom)
+Fix for "--" comment and no trailing newline, as seen in perl interface
+Improve pg_dump failure error reports (Bruce)
+Allow sorts and hashes to exceed 2GB file sizes (Tom)
+Fix for pg_dump dumping of inherited rules (Tom)
+Fix for NULL handling comparisons (Tom)
+Fix inconsistent state caused by failed CREATE/DROP commands (Hiroshi)
+Fix for dbname with dash
+Prevent DROP INDEX from interfering with other backends (Tom)
+Fix file descriptor leak in verify_password()
+Fix for "Unable to identify an operator =$" problem
+Fix ODBC so no segfault if CommLog and Debug enabled (Dirk Niggemann)
+Fix for recursive exit call (Massimo)
+Fix for extra-long timezones (Jeroen van Vianen)
+Make pg_dump preserve primary key information (Peter E)
+Prevent databases with single quotes (Peter E)
+Prevent DROP DATABASE inside transaction (Peter E)
+ecpg memory leak fixes (Stephen Birch)
+Fix for SELECT null::text, SELECT int4fac(null) and SELECT 2 + (null) (Tom)
+Y2K timestamp fix (Massimo)
+Fix for VACUUM 'HEAP_MOVED_IN was not expected' errors (Tom)
+Fix for views with tables/columns containing spaces (Tom)
+Prevent privileges on indexes (Peter E)
+Fix for spinlock stuck problem when error is generated (Hiroshi)
+Fix ipcclean on Linux
+Fix handling of NULL constraint conditions (Tom)
+Fix memory leak in odbc driver (Nick Gorham)
+Fix for privilege check on UNION tables (Tom)
+Fix to allow SELECT 'a' LIKE 'a' (Tom)
+Fix for SELECT 1 + NULL (Tom)
+Fixes to CHAR
+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
+------------
+New CLI interface include file sqlcli.h, based on SQL3/SQL98
+Remove all limits on query length, row length limit still exists (Tom)
+Add TRUNCATE command to quickly truncate relation (Mike Mascari)
+Fix to give super user and createdb user proper update catalog rights (Peter E)
+Allow ecpg bool variables to have NULL values (Christof)
+Issue ecpg error if NULL value for variable with no NULL indicator (Christof)
+Allow ^C to cancel COPY command (Massimo)
+Add SET FSYNC and SHOW PG_OPTIONS commands(Massimo)
+Function name overloading for dynamically-loaded C functions (Frankpitt)
+Add CmdTuples() to libpq++(Vince)
+New CREATE CONSTRAINT TRIGGER and SET CONSTRAINTS commands(Jan)
+Allow CREATE FUNCTION/WITH clause to be used for all language types
+configure --enable-debug adds -g (Peter E)
+configure --disable-debug removes -g (Peter E)
+Allow more complex default expressions (Tom)
+First real FOREIGN KEY constraint trigger functionality (Jan)
+Add FOREIGN KEY ... MATCH FULL ... ON DELETE CASCADE (Jan)
+Add FOREIGN KEY ... MATCH <unspecified> referential actions (Don Baccus)
+Allow WHERE restriction on ctid (physical heap location) (Hiroshi)
+Move pginterface from contrib to interface directory, rename to pgeasy (Bruce)
+Change pgeasy connectdb() parameter ordering (Bruce)
+Require SELECT DISTINCT target list to have all ORDER BY columns (Tom)
+libpq's PQsetNoticeProcessor function now returns previous hook(Peter E)
+Prevent PQsetNoticeProcessor from being set to NULL (Peter E)
+Make USING in COPY optional (Bruce)
+Allow subselects in the target list (Tom)
+Allow subselects on the left side of comparison operators (Tom)
+New parallel regression test (Jan)
+Change backend-side COPY to write files with permissions 644 not 666 (Tom)
+Force permissions on PGDATA directory to be secure, even if it exists (Tom)
+Added psql LASTOID variable to return last inserted oid (Peter E)
+Allow concurrent vacuum and remove pg_vlock vacuum lock file (Tom)
+Add privilege check for vacuum (Peter E)
+New libpq functions to allow asynchronous connections: PQconnectStart(),
+ PQconnectPoll(), PQresetStart(), PQresetPoll(), PQsetenvStart(),
+ PQsetenvPoll(), PQsetenvAbort (Ewan Mellor)
+New libpq PQsetenv() function (Ewan Mellor)
+create/alter user extension (Peter E)
+New postmaster.pid and postmaster.opts under $PGDATA (Tatsuo)
+New scripts for create/drop user/db (Peter E)
+Major psql overhaul (Peter E)
+Add const to libpq interface (Peter E)
+New libpq function PQoidValue (Peter E)
+Show specific non-aggregate causing problem with GROUP BY (Tom)
+Make changes to pg_shadow recreate pg_pwd file (Peter E)
+Add aggregate(DISTINCT ...) (Tom)
+Allow flag to control COPY input/output of NULLs (Peter E)
+Make postgres user have a password by default (Peter E)
+Add CREATE/ALTER/DROP GROUP (Peter E)
+All administration scripts now support --long options (Peter E, Karel)
+Vacuumdb script now supports --all option (Peter E)
+ecpg new portable FETCH syntax
+Add ecpg EXEC SQL IFDEF, EXEC SQL IFNDEF, EXEC SQL ELSE, EXEC SQL ELIF
+ and EXEC SQL ENDIF directives
+Add pg_ctl script to control backend start-up (Tatsuo)
+Add postmaster.opts.default file to store start-up flags (Tatsuo)
+Allow --with-mb=SQL_ASCII
+Increase maximum number of index keys to 16 (Bruce)
+Increase maximum number of function arguments to 16 (Bruce)
+Allow configuration of maximum number of index keys and arguments (Bruce)
+Allow unprivileged users to change their passwords (Peter E)
+Password authentication enabled; required for new users (Peter E)
+Disallow dropping a user who owns a database (Peter E)
+Change initdb option --with-mb to --enable-multibyte
+Add option for initdb to prompts for superuser password (Peter E)
+Allow complex type casts like col::numeric(9,2) and col::int2::float8 (Tom)
+Updated user interfaces on initdb, initlocation, pg_dump, ipcclean (Peter E)
+New pg_char_to_encoding() and pg_encoding_to_char() functions (Tatsuo)
+libpq non-blocking mode (Alfred Perlstein)
+Improve conversion of types in casts that don't specify a length
+New plperl internal programming language (Mark Hollomon)
+Allow COPY IN to read file that do not end with a newline (Tom)
+Indicate when long identifiers are truncated (Tom)
+Allow aggregates to use type equivalency (Peter E)
+Add Oracle's to_char(), to_date(), to_datetime(), to_timestamp(), to_number()
+Add SELECT DISTINCT ON (expr [, expr ...]) targetlist ... (Tom)
+Check to be sure ORDER BY is compatible with the DISTINCT operation (Tom)
+Add NUMERIC and int8 types to ODBC
+Improve EXPLAIN results for Append, Group, Agg, Unique (Tom)
+Add ALTER TABLE ... ADD FOREIGN KEY (Stephan Szabo)
+Allow SELECT .. FOR UPDATE in PL/pgSQL (Hiroshi)
+Enable backward sequential scan even after reaching EOF (Hiroshi)
+Add btree indexing of boolean values, >= and <= (Don Baccus)
+Print current line number when COPY FROM fails (Massimo)
+Recognize POSIX time zone e.g. "PST+8" and "GMT-8" (Thomas)
+Add DEC as synonym for DECIMAL (Thomas)
+Add SESSION_USER as SQL92 key word, same as CURRENT_USER (Thomas)
+Implement SQL92 column aliases (aka correlation names) (Thomas)
+Implement SQL92 join syntax (Thomas)
+Make INTERVAL reserved word allowed as a column identifier (Thomas)
+Implement REINDEX command (Hiroshi)
+Accept ALL in aggregate function SUM(ALL col) (Tom)
+Prevent GROUP BY from using column aliases (Tom)
+New psql \encoding option (Tatsuo)
+Allow PQrequestCancel() to terminate when in waiting-for-lock state (Hiroshi)
+Allow negation of a negative number in all cases
+Add ecpg descriptors (Christof, Michael)
+Allow CREATE VIEW v AS SELECT f1::char(8) FROM tbl
+Allow casts with length, like foo::char(8)
+New libpq functions PQsetClientEncoding(), PQclientEncoding() (Tatsuo)
+Add support for SJIS user defined characters (Tatsuo)
+Larger views/rules supported
+Make libpq's PQconndefaults() thread-safe (Tom)
+Disable // as comment to be ANSI conforming, should use -- (Tom)
+Allow column aliases on views CREATE VIEW name (collist)
+Fixes for views with subqueries (Tom)
+Allow UPDATE table SET fld = (SELECT ...) (Tom)
+SET command options no longer require quotes
+Update pgaccess to 0.98.6
+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
+-----
+Many array fixes (Tom)
+Allow bare column names to be subscripted as arrays (Tom)
+Improve type casting of int and float constants (Tom)
+Cleanups for int8 inputs, range checking, and type conversion (Tom)
+Fix for SELECT timespan('21:11:26'::time) (Tom)
+netmask('x.x.x.x/0') is 255.255.255.255 instead of 0.0.0.0 (Oleg Sharoiko)
+Add btree index on NUMERIC (Jan)
+Perl fix for large objects containing NUL characters (Douglas Thomson)
+ODBC fix for large objects (free)
+Fix indexing of cidr data type
+Fix for Ethernet MAC addresses (macaddr type) comparisons
+Fix for date/time types when overflows happened in computations (Tom)
+Allow array on int8 (Peter E)
+Fix for rounding/overflow of NUMERIC type, like NUMERIC(4,4) (Tom)
+Allow NUMERIC arrays
+Fix bugs in NUMERIC ceil() and floor() functions (Tom)
+Make char_length()/octet_length including trailing blanks (Tom)
+Made abstime/reltime use int4 instead of time_t (Peter E)
+New lztext data type for compressed text fields
+Revise code to handle coercion of int and float constants (Tom)
+Start at new code to implement a BIT and BIT VARYING type (Adriaan Joubert)
+NUMERIC now accepts scientific notation (Tom)
+NUMERIC to int4 rounds (Tom)
+Convert float4/8 to NUMERIC properly (Tom)
+Allow type conversion with NUMERIC (Thomas)
+Make ISO date style (2000-02-16 09:33) the default (Thomas)
+Add NATIONAL CHAR [ VARYING ] (Thomas)
+Allow NUMERIC round and trunc to accept negative scales (Tom)
+New TIME WITH TIME ZONE type (Thomas)
+Add MAX()/MIN() on time type (Thomas)
+Add abs(), mod(), fac() for int8 (Thomas)
+Rename functions to round(), sqrt(), cbrt(), pow() for float8 (Thomas)
+Add transcendental math functions (e.g. sin(), acos()) for float8 (Thomas)
+Add exp() and ln() for NUMERIC type
+Rename NUMERIC power() to pow() (Thomas)
+Improved TRANSLATE() function (Edwin Ramirez, Tom)
+Allow X=-Y operators (Tom)
+Allow SELECT float8(COUNT(*))/(SELECT COUNT(*) FROM t) FROM t GROUP BY f1; (Tom)
+Allow LOCALE to use indexes in regular expression searches (Tom)
+Allow creation of functional indexes to use default types
+
+Performance
+-----------
+Prevent exponential space consumption with many AND's and OR's (Tom)
+Collect attribute selectivity values for system columns (Tom)
+Reduce memory usage of aggregates (Tom)
+Fix for LIKE optimization to use indexes with multibyte encodings (Tom)
+Fix r-tree index optimizer selectivity (Thomas)
+Improve optimizer selectivity computations and functions (Tom)
+Optimize btree searching for cases where many equal keys exist (Tom)
+Enable fast LIKE index processing only if index present (Tom)
+Re-use free space on index pages with duplicates (Tom)
+Improve hash join processing (Tom)
+Prevent descending sort if result is already sorted(Hiroshi)
+Allow commuting of index scan query qualifications (Tom)
+Prefer index scans in cases where ORDER BY/GROUP BY is required (Tom)
+Allocate large memory requests in fix-sized chunks for performance (Tom)
+Fix vacuum's performance by reducing memory allocation requests (Tom)
+Implement constant-expression simplification (Bernard Frankpitt, Tom)
+Use secondary columns to be used to determine start of index scan (Hiroshi)
+Prevent quadruple use of disk space when doing internal sorting (Tom)
+Faster sorting by calling fewer functions (Tom)
+Create system indexes to match all system caches (Bruce, Hiroshi)
+Make system caches use system indexes (Bruce)
+Make all system indexes unique (Bruce)
+Improve pg_statistics management for VACUUM speed improvement (Tom)
+Flush backend cache less frequently (Tom, Hiroshi)
+COPY now reuses previous memory allocation, improving performance (Tom)
+Improve optimization cost estimation (Tom)
+Improve optimizer estimate of range queries x > lowbound AND x < highbound (Tom)
+Use DNF instead of CNF where appropriate (Tom, Taral)
+Further cleanup for OR-of-AND WHERE-clauses (Tom)
+Make use of index in OR clauses (x = 1 AND y = 2) OR (x = 2 AND y = 4) (Tom)
+Smarter optimizer computations for random index page access (Tom)
+New SET variable to control optimizer costs (Tom)
+Optimizer queries based on LIMIT, OFFSET, and EXISTS qualifications (Tom)
+Reduce optimizer internal housekeeping of join paths for speedup (Tom)
+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
+-------------------
+Fix for linux PPC compile
+New generic expression-tree-walker subroutine (Tom)
+Change form() to varargform() to prevent portability problems
+Improved range checking for large integers on Alphas
+Clean up #include in /include directory (Bruce)
+Add scripts for checking includes (Bruce)
+Remove un-needed #include's from *.c files (Bruce)
+Change #include's to use <> and "" as appropriate (Bruce)
+Enable Windows compilation of libpq
+Overhaul of optimizer data structures (Tom)
+Fix to cygipc library (Yutaka Tanida)
+Allow pgsql to work on newer Cygwin snapshots (Dan)
+New catalog version number (Tom)
+Add Linux ARM
+Rename heap_replace to heap_update
+Update for QNX (Dr. Andreas Kardos)
+New platform-specific regression handling (Tom)
+Rename oid8 -> oidvector and int28 -> int2vector (Bruce)
+Included all yacc and lex files into the distribution (Peter E.)
+Remove lextest, no longer needed (Peter E)
+Fix for libpq and psql on Windows (Magnus)
+Internally change datetime and timespan into timestamp and interval (Thomas)
+Fix for plpgsql on BSD/OS
+Add SQL_ASCII test case to the regression test (Tatsuo)
+configure --with-mb now deprecated (Tatsuo)
+NT fixes
+Fixes for Alpha compiles
+New multibyte encodings
+
+
+
+
+
+
+
Release 6.5.3
+
+
+
Release date
+ 1999-10-13
+
+
+ This is basically a cleanup release for 6.5.2. We have added a new
+
PgAccess that was missing in 6.5.2, and installed an NT-specific fix. +
+
+
+
+
Migration to Version 6.5.3
+
+ A dump/restore is not required for those running
+ 6.5.*.
+
+
+
+
Changes
+
+Updated version of pgaccess 0.98
+NT-specific patch
+Fix dumping rules on inherited tables
+
+
+
+
+
+
+
+
Release 6.5.2
+
+
+
Release date
+ 1999-09-15
+
+
+ This is basically a cleanup release for 6.5.1. We have fixed a variety of
+ problems reported by 6.5.1 users.
+
+
+
+
+
Migration to Version 6.5.2
+
+ A dump/restore is not required for those running
+ 6.5.*.
+
+
+
+
+
Changes
+
+subselect+CASE fixes(Tom)
+Add SHLIB_LINK setting for solaris_i386 and solaris_sparc ports(Daren Sefcik)
+Fixes for CASE in WHERE join clauses(Tom)
+Fix BTScan abort(Tom)
+Repair the check for redundant UNIQUE and PRIMARY KEY indexes(Thomas)
+Improve it so that it checks for multicolumn constraints(Thomas)
+Fix for Windows making problem with MB enabled(Hiroki Kataoka)
+Allow BSD yacc and bison to compile pl code(Bruce)
+Fix SET NAMES working
+int8 fixes(Thomas)
+Fix vacuum's memory consumption(Hiroshi,Tatsuo)
+Reduce the total memory consumption of vacuum(Tom)
+Fix for timestamp(datetime)
+Rule deparsing bugfixes(Tom)
+Fix quoting problems in mkMakefile.tcldefs.sh.in and mkMakefile.tkdefs.sh.in(Tom)
+This is to re-use space on index pages freed by vacuum(Vadim)
+document -x for pg_dump(Bruce)
+Fix for unary operators in rule deparser(Tom)
+Comment out FileUnlink of excess segments during mdtruncate()(Tom)
+Repair logic error in LIKE: should not return LIKE_ABORT
+ when reach end of pattern before end of text(Tom)
+Repair incorrect cleanup of heap memory allocation during transaction abort(Tom)
+Updated version of pgaccess 0.98
+
+
+
+
+
+
+
Release 6.5.1
+
+
+
Release date
+ 1999-07-15
+
+
+ This is basically a cleanup release for 6.5. We have fixed a variety of
+ problems reported by 6.5 users.
+
+
+
+
Migration to Version 6.5.1
+
+ A dump/restore is not required for those running
+ 6.5.
+
+
+
+
+
Changes
+
+Add NT README file
+Portability fixes for linux_ppc, IRIX, linux_alpha, OpenBSD, alpha
+Remove QUERY_LIMIT, use SELECT...LIMIT
+Fix for EXPLAIN on inheritance(Tom)
+Patch to allow vacuum on multisegment tables(Hiroshi)
+R-Tree optimizer selectivity fix(Tom)
+ACL file descriptor leak fix(Atsushi Ogawa)
+New expression subtree code(Tom)
+Avoid disk writes for read-only transactions(Vadim)
+Fix for removal of temp tables if last transaction was aborted(Bruce)
+Fix to prevent too large row from being created(Bruce)
+plpgsql fixes
+Allow port numbers 32k - 64k(Bruce)
+Add ^ precedence(Bruce)
+Rename sort files called pg_temp to pg_sorttemp(Bruce)
+Fix for microseconds in time values(Tom)
+Tutorial source cleanup
+New linux_m68k port
+Fix for sorting of NULL's in some cases(Tom)
+Shared library dependencies fixed (Tom)
+Fixed glitches affecting GROUP BY in subselects(Tom)
+Fix some compiler warnings (Tomoaki Nishiyama)
+Add Win1250 (Czech) support (Pavel Behal)
+
+
+
+
+
+
+
Release 6.5
+
+
+
Release date
+ 1999-06-09
+
+
+ This release marks a major step in the development team's mastery of the source
+ code we inherited from Berkeley. You will see we are now easily adding
+ major features, thanks to the increasing size and experience of our
+ world-wide development team.
+
+
+ Here is a brief summary of the more notable changes:
+
+
+
+
+ Multiversion concurrency control(MVCC)
+
+
+ This removes our old table-level locking, and replaces it with
+ a locking system that is superior to most commercial database
+ systems. In a traditional system, each row that is modified
+ is locked until committed, preventing reads by other users.
+ MVCC uses the natural multiversion nature of
+
PostgreSQL to allow readers to
+ continue reading consistent data during writer activity.
+ Writers continue to use the compact pg_log transaction system.
+ This is all performed without having to allocate a lock for
+ every row like traditional database systems. So, basically,
+ we no longer are restricted by simple table-level locking; we
+ have something better than row-level locking.
+
+
+
+
+
+
+ Hot backups from
pg_dump +
+
+
pg_dump takes advantage of the new
+ MVCC features to give a consistent database dump/backup while
+ the database stays online and available for queries.
+
+
+
+
+
+
+ Numeric data type
+
+
+ We now have a true numeric data type, with
+ user-specified precision.
+
+
+
+
+
+
+ Temporary tables
+
+
+ Temporary tables are guaranteed to have unique names
+ within a database session, and are destroyed on session exit.
+
+
+
+
+
+
+ New SQL features
+
+
+ We now have CASE, INTERSECT, and EXCEPT statement
+ support. We have new LIMIT/OFFSET, SET TRANSACTION ISOLATION LEVEL,
+ SELECT ... FOR UPDATE, and an improved LOCK TABLE command.
+
+
+
+
+
+
+ Speedups
+
+
+ We continue to speed up
PostgreSQL ,
+ thanks to the variety of talents within our team. We have
+ sped up memory allocation, optimization, table joins, and row
+ transfer routines.
+
+
+
+
+
+
+ Ports
+
+
+ We continue to expand our port list, this time including
+ Windows NT/ix86 and NetBSD/arm32.
+
+
+
+
+
+
+ Interfaces
+
+
+ Most interfaces have new versions, and existing functionality
+ has been improved.
+
+
+
+
+
+
+ Documentation
+
+
+ New and updated material is present throughout the
+ documentation. New
FAQ s have been
+ contributed for SGI and AIX platforms.
+ The Tutorial has introductory information
+ on
SQL from Stefan Simkovics.
+ For the User's Guide , there are
+ reference pages covering the postmaster and more utility
+ programs, and a new appendix
+ contains details on date/time behavior.
+ The Administrator's Guide has a new
+ chapter on troubleshooting from Tom Lane.
+ And the Programmer's Guide has a
+ description of query processing, also from Stefan, and details
+ on obtaining the
PostgreSQL source
+ tree via anonymous
CVS and
+
+
+
+
+
+
+
+
Migration to Version 6.5
+
+ A dump/restore using
pg_dump + is required for those wishing to migrate data from any
+ previous release of
PostgreSQL .
+ be used to upgrade to this release because the on-disk structure
+ of the tables has changed compared to previous releases.
+
+
+ The new Multiversion Concurrency Control (MVCC) features can
+ give somewhat different behaviors in multiuser
+ environments. Read and understand the following section
+ to ensure that your existing applications will give you the
+ behavior you need.
+
+
+
+
Multiversion Concurrency Control
+
+ Because readers in 6.5 don't lock data, regardless of transaction
+ isolation level, data read by one transaction can be overwritten by
+ another. In other words, if a row is returned by
+ SELECT it doesn't mean that this row really exists
+ at the time it is returned (i.e. sometime after the statement or
+ transaction began) nor that the row is protected from being deleted or
+ updated by concurrent transactions before the current transaction does
+ a commit or rollback.
+
+
+ To ensure the actual existence of a row and protect it against
+ concurrent updates one must use SELECT FOR UPDATE or
+ an appropriate LOCK TABLE statement. This should be
+ taken into account when porting applications from previous releases of
+
PostgreSQL and other environments.
+
+
+ Keep the above in mind if you are using
+ contrib/refint.* triggers for
+ referential integrity. Additional techniques are required now. One way is
+ to use LOCK parent_table IN SHARE ROW EXCLUSIVE MODE
+ command if a transaction is going to update/delete a primary key and
+ use LOCK parent_table IN SHARE MODE command if a
+ transaction is going to update/insert a foreign key.
+
+
+ Note that if you run a transaction in SERIALIZABLE mode then you must
+ execute the LOCK commands above before execution of any
+ (SELECT/INSERT/DELETE/UPDATE/FETCH/COPY_TO ) in the
+ transaction.
+
+
+
+
+ These inconveniences will disappear in the future
+ when the ability to read dirty
+ (uncommitted) data (regardless of isolation level) and true referential
+ integrity will be implemented.
+
+
+
+
+
+
Changes
+
+Bug Fixes
+---------
+Fix text<->float8 and text<->float4 conversion functions(Thomas)
+Fix for creating tables with mixed-case constraints(Billy)
+Change exp()/pow() behavior to generate error on underflow/overflow(Jan)
+Fix bug in pg_dump -z
+Memory overrun cleanups(Tatsuo)
+Fix for lo_import crash(Tatsuo)
+Adjust handling of data type names to suppress double quotes(Thomas)
+Use type coercion for matching columns and DEFAULT(Thomas)
+Fix deadlock so it only checks once after one second of sleep(Bruce)
+Fixes for aggregates and PL/pgsql(Hiroshi)
+Fix for subquery crash(Vadim)
+Fix for libpq function PQfnumber and case-insensitive names(Bahman Rafatjoo)
+Fix for large object write-in-middle, no extra block, memory consumption(Tatsuo)
+Fix for pg_dump -d or -D and quote special characters in INSERT
+Repair serious problems with dynahash(Tom)
+Fix INET/CIDR portability problems
+Fix problem with selectivity error in ALTER TABLE ADD COLUMN(Bruce)
+Fix executor so mergejoin of different column types works(Tom)
+Fix for Alpha OR selectivity bug
+Fix OR index selectivity problem(Bruce)
+Fix so \d shows proper length for char()/varchar()(Ryan)
+Fix tutorial code(Clark)
+Improve destroyuser checking(Oliver)
+Fix for Kerberos(Rodney McDuff)
+Fix for dropping database while dirty buffers(Bruce)
+Fix so sequence nextval() can be case-sensitive(Bruce)
+Fix !!= operator
+Drop buffers before destroying database files(Bruce)
+Fix case where executor evaluates functions twice(Tatsuo)
+Allow sequence nextval actions to be case-sensitive(Bruce)
+Fix optimizer indexing not working for negative numbers(Bruce)
+Fix for memory leak in executor with fjIsNull
+Fix for aggregate memory leaks(Erik Riedel)
+Allow user name containing a dash to grant privileges
+Cleanup of NULL in inet types
+Clean up system table bugs(Tom)
+Fix problems of PAGER and \? command(Masaaki Sakaida)
+Reduce default multisegment file size limit to 1GB(Peter)
+Fix for dumping of CREATE OPERATOR(Tom)
+Fix for backward scanning of cursors(Hiroshi Inoue)
+Fix for COPY FROM STDIN when using \i(Tom)
+Fix for subselect is compared inside an expression(Jan)
+Fix handling of error reporting while returning rows(Tom)
+Fix problems with reference to array types(Tom,Jan)
+Prevent UPDATE SET oid(Jan)
+Fix pg_dump so -t option can handle case-sensitive tablenames
+Fixes for GROUP BY in special cases(Tom, Jan)
+Fix for memory leak in failed queries(Tom)
+DEFAULT now supports mixed-case identifiers(Tom)
+Fix for multisegment uses of DROP/RENAME table, indexes(Ole Gjerde)
+Disable use of pg_dump with both -o and -d options(Bruce)
+Allow pg_dump to properly dump group privileges(Bruce)
+Fix GROUP BY in INSERT INTO table SELECT * FROM table2(Jan)
+Fix for computations in views(Jan)
+Fix for aggregates on array indexes(Tom)
+Fix for DEFAULT handles single quotes in value requiring too many quotes
+Fix security problem with non-super users importing/exporting large objects(Tom)
+Rollback of transaction that creates table cleaned up properly(Tom)
+Fix to allow long table and column names to generate proper serial names(Tom)
+
+Enhancements
+------------
+Add "vacuumdb" utility
+Speed up libpq by allocating memory better(Tom)
+EXPLAIN all indexes used(Tom)
+Implement CASE, COALESCE, NULLIF expression(Thomas)
+New pg_dump table output format(Constantin)
+Add string min()/max() functions(Thomas)
+Extend new type coercion techniques to aggregates(Thomas)
+New moddatetime contrib(Terry)
+Update to pgaccess 0.96(Constantin)
+Add routines for single-byte "char" type(Thomas)
+Improved substr() function(Thomas)
+Improved multibyte handling(Tatsuo)
+Multiversion concurrency control/MVCC(Vadim)
+New Serialized mode(Vadim)
+Fix for tables over 2gigs(Peter)
+New SET TRANSACTION ISOLATION LEVEL(Vadim)
+New LOCK TABLE IN ... MODE(Vadim)
+Update ODBC driver(Byron)
+New NUMERIC data type(Jan)
+New SELECT FOR UPDATE(Vadim)
+Handle "NaN" and "Infinity" for input values(Jan)
+Improved date/year handling(Thomas)
+Improved handling of backend connections(Magnus)
+New options ELOG_TIMESTAMPS and USE_SYSLOG options for log files(Massimo)
+New TCL_ARRAYS option(Massimo)
+New INTERSECT and EXCEPT(Stefan)
+New pg_index.indisprimary for primary key tracking(D'Arcy)
+New pg_dump option to allow dropping of tables before creation(Brook)
+Speedup of row output routines(Tom)
+New READ COMMITTED isolation level(Vadim)
+New TEMP tables/indexes(Bruce)
+Prevent sorting if result is already sorted(Jan)
+New memory allocation optimization(Jan)
+Allow psql to do \p\g(Bruce)
+Allow multiple rule actions(Jan)
+Added LIMIT/OFFSET functionality(Jan)
+Improve optimizer when joining a large number of tables(Bruce)
+New intro to SQL from S. Simkovics' Master's Thesis (Stefan, Thomas)
+New intro to backend processing from S. Simkovics' Master's Thesis (Stefan)
+Improved int8 support(Ryan Bradetich, Thomas, Tom)
+New routines to convert between int8 and text/varchar types(Thomas)
+New bushy plans, where meta-tables are joined(Bruce)
+Enable right-hand queries by default(Bruce)
+Allow reliable maximum number of backends to be set at configure time
+ (--with-maxbackends and postmaster switch (-N backends))(Tom)
+GEQO default now 10 tables because of optimizer speedups(Tom)
+Allow NULL=Var for MS-SQL portability(Michael, Bruce)
+Modify contrib check_primary_key() so either "automatic" or "dependent"(Anand)
+Allow psql \d on a view show query(Ryan)
+Speedup for LIKE(Bruce)
+Ecpg fixes/features, see src/interfaces/ecpg/ChangeLog file(Michael)
+JDBC fixes/features, see src/interfaces/jdbc/CHANGELOG(Peter)
+Make % operator have precedence like /(Bruce)
+Add new postgres -O option to allow system table structure changes(Bruce)
+Update contrib/pginterface/findoidjoins script(Tom)
+Major speedup in vacuum of deleted rows with indexes(Vadim)
+Allow non-SQL functions to run different versions based on arguments(Tom)
+Add -E option that shows actual queries sent by \dt and friends(Masaaki Sakaida)
+Add version number in start-up banners for psql(Masaaki Sakaida)
+New contrib/vacuumlo removes large objects not referenced(Peter)
+New initialization for table sizes so non-vacuumed tables perform better(Tom)
+Improve error messages when a connection is rejected(Tom)
+Support for arrays of char() and varchar() fields(Massimo)
+Overhaul of hash code to increase reliability and performance(Tom)
+Update to PyGreSQL 2.4(D'Arcy)
+Changed debug options so -d4 and -d5 produce different node displays(Jan)
+New pg_options: pretty_plan, pretty_parse, pretty_rewritten(Jan)
+Better optimization statistics for system table access(Tom)
+Better handling of non-default block sizes(Massimo)
+Improve GEQO optimizer memory consumption(Tom)
+UNION now supports ORDER BY of columns not in target list(Jan)
+Major libpq++ improvements(Vince Vielhaber)
+pg_dump now uses -z(ACL's) as default(Bruce)
+backend cache, memory speedups(Tom)
+have pg_dump do everything in one snapshot transaction(Vadim)
+fix for large object memory leakage, fix for pg_dumping(Tom)
+INET type now respects netmask for comparisons
+Make VACUUM ANALYZE only use a readlock(Vadim)
+Allow VIEWs on UNIONS(Jan)
+pg_dump now can generate consistent snapshots on active databases(Vadim)
+
+Source Tree Changes
+-------------------
+Improve port matching(Tom)
+Portability fixes for SunOS
+Add Windows NT backend port and enable dynamic loading(Magnus and Daniel Horak)
+New port to Cobalt Qube(Mips) running Linux(Tatsuo)
+Port to NetBSD/m68k(Mr. Mutsuki Nakajima)
+Port to NetBSD/sun3(Mr. Mutsuki Nakajima)
+Port to NetBSD/macppc(Toshimi Aoki)
+Fix for tcl/tk configuration(Vince)
+Removed CURRENT key word for rule queries(Jan)
+NT dynamic loading now works(Daniel Horak)
+Add ARM32 support(Andrew McMurry)
+Better support for HP-UX 11 and UnixWare
+Improve file handling to be more uniform, prevent file descriptor leak(Tom)
+New install commands for plpgsql(Jan)
+
+
+
+
+
+
+
+
Release 6.4.2
+
+
+
Release date
+ 1998-12-20
+
+
+The 6.4.1 release was improperly packaged. This also has one additional
+bug fix.
+
+
+
+
+
Migration to Version 6.4.2
+
+A dump/restore is not required for those running
+6.4.*.
+
+
+
+
Changes
+
+Fix for datetime constant problem on some platforms(Thomas)
+
+
+
+
+
+
+
+
+
Release 6.4.1
+
+
+
Release date
+ 1998-12-18
+
+
+This is basically a cleanup release for 6.4. We have fixed a variety of
+problems reported by 6.4 users.
+
+
+
+
+
Migration to Version 6.4.1
+
+A dump/restore is not required for those running
+6.4.
+
+
+
+
Changes
+
+Add pg_dump -N flag to force double quotes around identifiers. This is
+ the default(Thomas)
+Fix for NOT in where clause causing crash(Bruce)
+EXPLAIN VERBOSE coredump fix(Vadim)
+Fix shared-library problems on Linux
+Fix test for table existence to allow mixed-case and whitespace in
+ the table name(Thomas)
+Fix a couple of pg_dump bugs
+Configure matches template/.similar entries better(Tom)
+Change builtin function names from SPI_* to spi_*
+OR WHERE clause fix(Vadim)
+Fixes for mixed-case table names(Billy)
+contrib/linux/postgres.init.csh/sh fix(Thomas)
+libpq memory overrun fix
+SunOS fixes(Tom)
+Change exp() behavior to generate error on underflow(Thomas)
+pg_dump fixes for memory leak, inheritance constraints, layout change
+update pgaccess to 0.93
+Fix prototype for 64-bit platforms
+Multibyte fixes(Tatsuo)
+New ecpg man page
+Fix memory overruns(Tatsuo)
+Fix for lo_import() crash(Bruce)
+Better search for install program(Tom)
+Timezone fixes(Tom)
+HP-UX fixes(Tom)
+Use implicit type coercion for matching DEFAULT values(Thomas)
+Add routines to help with single-byte (internal) character type(Thomas)
+Compilation of libpq for Windows fixes(Magnus)
+Upgrade to PyGreSQL 2.2(D'Arcy)
+
+
+
+
+
+
+
+
+
Release 6.4
+
+
+
Release date
+ 1998-10-30
+
+
+There are many new features and improvements in this release.
+Thanks to our developers and maintainers, nearly every aspect of the system
+has received some attention since the previous release.
+Here is a brief, incomplete summary:
+
+
+
+Views and rules are now functional thanks to extensive new code in the
+rewrite rules system from Jan Wieck. He also wrote a chapter on it
+for the Programmer's Guide .
+
+
+
+Jan also contributed a second procedural language,
PL/pgSQL , to go with the
+original
PL/pgTCL procedural language he contributed last release.
+
+
+
+
+We have optional multiple-byte character set support from Tatsuo Ishii
+to complement our existing locale support.
+
+
+
+
+Client/server communications has been cleaned up, with better support for
+asynchronous messages and interrupts thanks to Tom Lane.
+
+
+
+
+The parser will now perform automatic type coercion to match arguments
+to available operators and functions, and to match columns and expressions
+with target columns. This uses a generic mechanism which supports
+the type extensibility features of
PostgreSQL .
+There is a new chapter in the User's Guide
+which covers this topic.
+
+
+
+
+Three new data types have been added.
+Two types, inet and cidr , support various forms
+of IP network, subnet, and machine addressing. There is now an 8-byte integer
+type available on some platforms. See the chapter on data types
+in the User's Guide for details.
+A fourth type, serial , is now supported by the parser as an
+amalgam of the int4 type, a sequence, and a unique index.
+
+
+
+
+Several more
SQL92 -compatible syntax features have been
+added, including INSERT DEFAULT VALUES
+
+
+
+
+The automatic configuration and installation system has received some
+attention, and should be more robust for more platforms than it has ever
+been.
+
+
+
+
+
+
+
+
Migration to Version 6.4
+
+A dump/restore using
pg_dump +is required for those wishing to migrate data from any
+previous release of
PostgreSQL .
+
+
+
+
+
Changes
+
+Bug Fixes
+---------
+Fix for a tiny memory leak in PQsetdb/PQfinish(Bryan)
+Remove char2-16 data types, use char/varchar(Darren)
+Pqfn not handles a NOTICE message(Anders)
+Reduced busywaiting overhead for spinlocks with many backends (dg)
+Stuck spinlock detection (dg)
+Fix up "ISO-style" timespan decoding and encoding(Thomas)
+Fix problem with table drop after rollback of transaction(Vadim)
+Change error message and remove non-functional update message(Vadim)
+Fix for COPY array checking
+Fix for SELECT 1 UNION SELECT NULL
+Fix for buffer leaks in large object calls(Pascal)
+Change owner from oid to int4 type(Bruce)
+Fix a bug in the oracle compatibility functions btrim() ltrim() and rtrim()
+Fix for shared invalidation cache overflow(Massimo)
+Prevent file descriptor leaks in failed COPY's(Bruce)
+Fix memory leak in libpgtcl's pg_select(Constantin)
+Fix problems with username/passwords over 8 characters(Tom)
+Fix problems with handling of asynchronous NOTIFY in backend(Tom)
+Fix of many bad system table entries(Tom)
+
+Enhancements
+------------
+Upgrade ecpg and ecpglib,see src/interfaces/ecpc/ChangeLog(Michael)
+Show the index used in an EXPLAIN(Zeugswetter)
+EXPLAIN invokes rule system and shows plan(s) for rewritten queries(Jan)
+Multibyte awareness of many data types and functions, via configure(Tatsuo)
+New configure --with-mb option(Tatsuo)
+New initdb --pgencoding option(Tatsuo)
+New createdb -E multibyte option(Tatsuo)
+Select version(); now returns PostgreSQL version(Jeroen)
+libpq now allows asynchronous clients(Tom)
+Allow cancel from client of backend query(Tom)
+psql now cancels query with Control-C(Tom)
+libpq users need not issue dummy queries to get NOTIFY messages(Tom)
+NOTIFY now sends sender's PID, so you can tell whether it was your own(Tom)
+PGresult struct now includes associated error message, if any(Tom)
+Define "tz_hour" and "tz_minute" arguments to date_part()(Thomas)
+Add routines to convert between varchar and bpchar(Thomas)
+Add routines to allow sizing of varchar and bpchar into target columns(Thomas)
+Add bit flags to support timezonehour and minute in data retrieval(Thomas)
+Allow more variations on valid floating point numbers (e.g. ".1", "1e6")(Thomas)
+Fixes for unary minus parsing with leading spaces(Thomas)
+Implement TIMEZONE_HOUR, TIMEZONE_MINUTE per SQL92 specs(Thomas)
+Check for and properly ignore FOREIGN KEY column constraints(Thomas)
+Define USER as synonym for CURRENT_USER per SQL92 specs(Thomas)
+Enable HAVING clause but no fixes elsewhere yet.
+Make "char" type a synonym for "char(1)" (actually implemented as bpchar)(Thomas)
+Save string type if specified for DEFAULT clause handling(Thomas)
+Coerce operations involving different data types(Thomas)
+Allow some index use for columns of different types(Thomas)
+Add capabilities for automatic type conversion(Thomas)
+Cleanups for large objects, so file is truncated on open(Peter)
+Readline cleanups(Tom)
+Allow psql \f \ to make spaces as delimiter(Bruce)
+Pass pg_attribute.atttypmod to the frontend for column field lengths(Tom,Bruce)
+Msql compatibility library in /contrib(Aldrin)
+Remove the requirement that ORDER/GROUP BY clause identifiers be
+included in the target list(David)
+Convert columns to match columns in UNION clauses(Thomas)
+Remove fork()/exec() and only do fork()(Bruce)
+Jdbc cleanups(Peter)
+Show backend status on ps command line(only works on some platforms)(Bruce)
+Pg_hba.conf now has a sameuser option in the database field
+Make lo_unlink take oid param, not int4
+New DISABLE_COMPLEX_MACRO for compilers that cannot handle our macros(Bruce)
+Libpgtcl now handles NOTIFY as a Tcl event, need not send dummy queries(Tom)
+libpgtcl cleanups(Tom)
+Add -error option to libpgtcl's pg_result command(Tom)
+New locale patch, see docs/README/locale(Oleg)
+Fix for pg_dump so CONSTRAINT and CHECK syntax is correct(ccb)
+New contrib/lo code for large object orphan removal(Peter)
+New psql command "SET CLIENT_ENCODING TO 'encoding'" for multibytes
+feature, see /doc/README.mb(Tatsuo)
+contrib/noupdate code to revoke update permission on a column
+libpq can now be compiled on Windows(Magnus)
+Add PQsetdbLogin() in libpq
+New 8-byte integer type, checked by configure for OS support(Thomas)
+Better support for quoted table/column names(Thomas)
+Surround table and column names with double-quotes in pg_dump(Thomas)
+PQreset() now works with passwords(Tom)
+Handle case of GROUP BY target list column number out of range(David)
+Allow UNION in subselects
+Add auto-size to screen to \d? commands(Bruce)
+Use UNION to show all \d? results in one query(Bruce)
+Add \d? field search feature(Bruce)
+Pg_dump issues fewer \connect requests(Tom)
+Make pg_dump -z flag work better, document it in manual page(Tom)
+Add HAVING clause with full support for subselects and unions(Stephan)
+Full text indexing routines in contrib/fulltextindex(Maarten)
+Transaction ids now stored in shared memory(Vadim)
+New PGCLIENTENCODING when issuing COPY command(Tatsuo)
+Support for SQL92 syntax "SET NAMES"(Tatsuo)
+Support for LATIN2-5(Tatsuo)
+Add UNICODE regression test case(Tatsuo)
+Lock manager cleanup, new locking modes for LLL(Vadim)
+Allow index use with OR clauses(Bruce)
+Allows "SELECT NULL ORDER BY 1;"
+Explain VERBOSE prints the plan, and now pretty-prints the plan to
+the postmaster log file(Bruce)
+Add indexes display to \d command(Bruce)
+Allow GROUP BY on functions(David)
+New pg_class.relkind for large objects(Bruce)
+New way to send libpq NOTICE messages to a different location(Tom)
+New \w write command to psql(Bruce)
+New /contrib/findoidjoins scans oid columns to find join relationships(Bruce)
+Allow binary-compatible indexes to be considered when checking for valid
+Indexes for restriction clauses containing a constant(Thomas)
+New ISBN/ISSN code in /contrib/isbn_issn
+Allow NOT LIKE, IN, NOT IN, BETWEEN, and NOT BETWEEN constraint(Thomas)
+New rewrite system fixes many problems with rules and views(Jan)
+ * Rules on relations work
+ * Event qualifications on insert/update/delete work
+ * New OLD variable to reference CURRENT, CURRENT will be remove in future
+ * Update rules can reference NEW and OLD in rule qualifications/actions
+ * Insert/update/delete rules on views work
+ * Multiple rule actions are now supported, surrounded by parentheses
+ * Regular users can create views/rules on tables they have RULE permits
+ * Rules and views inherit the privileges of the creator
+ * No rules at the column level
+ * No UPDATE NEW/OLD rules
+ * New pg_tables, pg_indexes, pg_rules and pg_views system views
+ * Only a single action on SELECT rules
+ * Total rewrite overhaul, perhaps for 6.5
+ * handle subselects
+ * handle aggregates on views
+ * handle insert into select from view works
+System indexes are now multikey(Bruce)
+Oidint2, oidint4, and oidname types are removed(Bruce)
+Use system cache for more system table lookups(Bruce)
+New backend programming language PL/pgSQL in backend/pl(Jan)
+New SERIAL data type, auto-creates sequence/index(Thomas)
+Enable assert checking without a recompile(Massimo)
+User lock enhancements(Massimo)
+New setval() command to set sequence value(Massimo)
+Auto-remove unix socket file on start-up if no postmaster running(Massimo)
+Conditional trace package(Massimo)
+New UNLISTEN command(Massimo)
+psql and libpq now compile under Windows using win32.mak(Magnus)
+Lo_read no longer stores trailing NULL(Bruce)
+Identifiers are now truncated to 31 characters internally(Bruce)
+Createuser options now available on the command line
+Code for 64-bit integer supported added, configure tested, int8 type(Thomas)
+Prevent file descriptor leaf from failed COPY(Bruce)
+New pg_upgrade command(Bruce)
+Updated /contrib directories(Massimo)
+New CREATE TABLE DEFAULT VALUES statement available(Thomas)
+New INSERT INTO TABLE DEFAULT VALUES statement available(Thomas)
+New DECLARE and FETCH feature(Thomas)
+libpq's internal structures now not exported(Tom)
+Allow up to 8 key indexes(Bruce)
+Remove ARCHIVE key word, that is no longer used(Thomas)
+pg_dump -n flag to suppress quotes around indentifiers
+disable system columns for views(Jan)
+new INET and CIDR types for network addresses(TomH, Paul)
+no more double quotes in psql output
+pg_dump now dumps views(Terry)
+new SET QUERY_LIMIT(Tatsuo,Jan)
+
+Source Tree Changes
+-------------------
+/contrib cleanup(Jun)
+Inline some small functions called for every row(Bruce)
+Alpha/linux fixes
+HP-UX cleanups(Tom)
+Multibyte regression tests(Soonmyung.)
+Remove --disabled options from configure
+Define PGDOC to use POSTGRESDIR by default
+Make regression optional
+Remove extra braces code to pgindent(Bruce)
+Add bsdi shared library support(Bruce)
+New --without-CXX support configure option(Brook)
+New FAQ_CVS
+Update backend flowchart in tools/backend(Bruce)
+Change atttypmod from int16 to int32(Bruce, Tom)
+Getrusage() fix for platforms that do not have it(Tom)
+Add PQconnectdb, PGUSER, PGPASSWORD to libpq man page
+NS32K platform fixes(Phil Nelson, John Buller)
+SCO 7/UnixWare 2.x fixes(Billy,others)
+Sparc/Solaris 2.5 fixes(Ryan)
+Pgbuiltin.3 is obsolete, move to doc files(Thomas)
+Even more documentation(Thomas)
+Nextstep support(Jacek)
+Aix support(David)
+pginterface manual page(Bruce)
+shared libraries all have version numbers
+merged all OS-specific shared library defines into one file
+smarter TCL/TK configuration checking(Billy)
+smarter perl configuration(Brook)
+configure uses supplied install-sh if no install script found(Tom)
+new Makefile.shlib for shared library configuration(Tom)
+
+
+
+
+
+
+
Release 6.3.2
+
+
+
Release date
+ 1998-04-07
+
+
+This is a bug-fix release for 6.3.x.
+Refer to the release notes for version 6.3 for a more complete summary of new features.
+
+Summary:
+
+
+
+Repairs automatic configuration support for some platforms, including Linux,
+from breakage inadvertently introduced in version 6.3.1.
+
+
+
+
+Correctly handles function calls on the left side of BETWEEN and LIKE clauses.
+
+
+
+
+
+A dump/restore is NOT required for those running 6.3 or 6.3.1. A
+make distclean, make, and make install is all that is required.
+This last step should be performed while the postmaster is not running.
+You should re-link any custom applications that use
PostgreSQL libraries.
+
+For upgrades from pre-6.3 installations,
+refer to the installation and migration instructions for version 6.3.
+
+
+
+
Changes
+
+Configure detection improvements for tcl/tk(Brook Milligan, Alvin)
+Manual page improvements(Bruce)
+BETWEEN and LIKE fix(Thomas)
+fix for psql \connect used by pg_dump(Oliver Elphick)
+New odbc driver
+pgaccess, version 0.86
+qsort removed, now uses libc version, cleanups(Jeroen)
+fix for buffer over-runs detected(Maurice Gittens)
+fix for buffer overrun in libpgtcl(Randy Kunkee)
+fix for UNION with DISTINCT or ORDER BY(Bruce)
+gettimeofday configure check(Doug Winterburn)
+Fix "indexes not used" bug(Vadim)
+docs additions(Thomas)
+Fix for backend memory leak(Bruce)
+libreadline cleanup(Erwan MAS)
+Remove DISTDIR(Bruce)
+Makefile dependency cleanup(Jeroen van Vianen)
+ASSERT fixes(Bruce)
+
+
+
+
+
+
+
Release 6.3.1
+
+
+
Release date
+ 1998-03-23
+
+
+ Summary:
+
+
+
+Additional support for multibyte character sets.
+
+
+
+
+Repair byte ordering for mixed-endian clients and servers.
+
+
+
+
+Minor updates to allowed SQL syntax.
+
+
+
+
+Improvements to the configuration autodetection for installation.
+
+
+
+
+
+A dump/restore is NOT required for those running 6.3. A
+make distclean, make, and make install is all that is required.
+This last step should be performed while the postmaster is not running.
+You should re-link any custom applications that use
PostgreSQL libraries.
+
+For upgrades from pre-6.3 installations,
+refer to the installation and migration instructions for version 6.3.
+
+
+
+
Changes
+
+ecpg cleanup/fixes, now version 1.1(Michael Meskes)
+pg_user cleanup(Bruce)
+large object fix for pg_dump and tclsh (alvin)
+LIKE fix for multiple adjacent underscores
+fix for redefining builtin functions(Thomas)
+ultrix4 cleanup
+upgrade to pg_access 0.83
+updated CLUSTER manual page
+multibyte character set support, see doc/README.mb(Tatsuo)
+configure --with-pgport fix
+pg_ident fix
+big-endian fix for backend communications(Kataoka)
+SUBSTR() and substring() fix(Jan)
+several jdbc fixes(Peter)
+libpgtcl improvements, see libptcl/README(Randy Kunkee)
+Fix for "Datasize = 0" error(Vadim)
+Prevent \do from wrapping(Bruce)
+Remove duplicate Russian character set entries
+Sunos4 cleanup
+Allow optional TABLE key word in LOCK and SELECT INTO(Thomas)
+CREATE SEQUENCE options to allow a negative integer(Thomas)
+Add "PASSWORD" as an allowed column identifier(Thomas)
+Add checks for UNION target fields(Bruce)
+Fix Alpha port(Dwayne Bailey)
+Fix for text arrays containing quotes(Doug Gibson)
+Solaris compile fix(Albert Chin-A-Young)
+Better identify tcl and tk libs and includes(Bruce)
+
+
+
+
+
+
+
Release 6.3
+
+
+
Release date
+ 1998-03-01
+
+
+ There are many new features and improvements in this release.
+ Here is a brief, incomplete summary:
+
+
+
+ Many new SQL features, including
+ full
SQL92 subselect capability
+ (everything is here but target-list subselects).
+
+
+
+
+ Support for client-side environment variables to specify time zone and date style.
+
+
+
+
+ Socket interface for client/server connection. This is the default now
+ so you might need to start
postmaster with the
+ -i flag.
+
+
+
+
+ Better password authorization mechanisms. Default table privileges have changed.
+
+
+
+
+ Old-style time travel
+ has been removed. Performance has been improved.
+
+
+
+
+
+
+ Bruce Momjian wrote the following notes to introduce the new release.
+
+
+
+ There are some general 6.3 issues that I want to mention. These are
+ only the big items that cannot be described in one sentence. A review
+ of the detailed changes list is still needed.
+
+ First, we now have subselects. Now that we have them, I would like to
+ mention that without subselects, SQL is a very limited language.
+ Subselects are a major feature, and you should review your code for
+ places where subselects provide a better solution for your queries. I
+ think you will find that there are more uses for subselects than you might
+ think. Vadim has put us on the big SQL map with subselects, and fully
+ functional ones too. The only thing you cannot do with subselects is to
+ use them in the target list.
+
+ Second, 6.3 uses Unix domain sockets rather than TCP/IP by default. To
+ enable connections from other machines, you have to use the new
+ postmaster -i option, and of course edit pg_hba.conf . Also, for this
+ reason, the format of pg_hba.conf has changed.
+
+ Third, char() fields will now allow faster access than varchar() or
+ text . Specifically, the text and varchar() have a penalty for access to
+ any columns after the first column of this type. char() used to also
+ have this access penalty, but it no longer does. This might suggest that
+ you redesign some of your tables, especially if you have short character
+ columns that you have defined as varchar() or text . This and other
+ changes make 6.3 even faster than earlier releases.
+
+ We now have passwords definable independent of any Unix file. There are
+ new SQL USER commands.
+ See the Administrator's Guide for more
+ information. There is a new table, pg_shadow, which is used to store
+ user information and user passwords, and it by default only SELECT-able
+ by the postgres super-user. pg_user is now a view of pg_shadow, and is
+ SELECT-able by PUBLIC. You should keep using pg_user in your
+ application without changes.
+
+ User-created tables now no longer have SELECT privilege to PUBLIC by
+ default. This was done because the ANSI standard requires it. You can
+ of course GRANT any privileges you want after the table is created.
+ System tables continue to be SELECT-able by PUBLIC.
+
+ We also have real deadlock detection code. No more sixty-second
+ timeouts. And the new locking code implements a
FIFO better, so there
+ should be less resource starvation during heavy use.
+
+ Many complaints have been made about inadequate documentation in previous
+ releases. Thomas has put much effort into many new manuals for this
+ release. Check out the doc/ directory.
+
+ For performance reasons, time travel is gone, but can be implemented
+ using triggers (see pgsql/contrib/spi/README ). Please check out the new
+ \d command for types, operators, etc. Also, views have their own
+ privileges now, not based on the underlying tables, so privileges on
+ them have to be set separately. Check /pgsql/interfaces for some new
+ ways to talk to
PostgreSQL .
+
+ This is the first release that really required an explanation for
+ existing users. In many ways, this was necessary because the new
+ release removes many limitations, and the work-arounds people were using
+ are no longer needed.
+
+
+
+
Migration to Version 6.3
+
+ A dump/restore using
pg_dump + is required for those wishing to migrate data from any
+ previous release of
PostgreSQL .
+
+
+
+
+
Changes
+
+Bug Fixes
+---------
+Fix binary cursors broken by MOVE implementation(Vadim)
+Fix for tcl library crash(Jan)
+Fix for array handling, from Gerhard Hintermayer
+Fix acl error, and remove duplicate pqtrace(Bruce)
+Fix psql \e for empty file(Bruce)
+Fix for textcat on varchar() fields(Bruce)
+Fix for DBT Sendproc (Zeugswetter Andres)
+Fix vacuum analyze syntax problem(Bruce)
+Fix for international identifiers(Tatsuo)
+Fix aggregates on inherited tables(Bruce)
+Fix substr() for out-of-bounds data
+Fix for select 1=1 or 2=2, select 1=1 and 2=2, and select sum(2+2)(Bruce)
+Fix notty output to show status result. -q option still turns it off(Bruce)
+Fix for count(*), aggs with views and multiple tables and sum(3)(Bruce)
+Fix cluster(Bruce)
+Fix for PQtrace start/stop several times(Bruce)
+Fix a variety of locking problems like newer lock waiters getting
+ lock before older waiters, and having readlock people not share
+ locks if a writer is waiting for a lock, and waiting writers not
+ getting priority over waiting readers(Bruce)
+Fix crashes in psql when executing queries from external files(James)
+Fix problem with multiple order by columns, with the first one having
+ NULL values(Jeroen)
+Use correct hash table support functions for float8 and int4(Thomas)
+Re-enable JOIN= option in CREATE OPERATOR statement (Thomas)
+Change precedence for boolean operators to match expected behavior(Thomas)
+Generate elog(ERROR) on over-large integer(Bruce)
+Allow multiple-argument functions in constraint clauses(Thomas)
+Check boolean input literals for 'true','false','yes','no','1','0'
+ and throw elog(ERROR) if unrecognized(Thomas)
+Major large objects fix
+Fix for GROUP BY showing duplicates(Vadim)
+Fix for index scans in MergeJoin(Vadim)
+
+Enhancements
+------------
+Subselects with EXISTS, IN, ALL, ANY key words (Vadim, Bruce, Thomas)
+New User Manual(Thomas, others)
+Speedup by inlining some frequently-called functions
+Real deadlock detection, no more timeouts(Bruce)
+Add SQL92 "constants" CURRENT_DATE, CURRENT_TIME, CURRENT_TIMESTAMP,
+ CURRENT_USER(Thomas)
+Modify constraint syntax to be SQL92-compliant(Thomas)
+Implement SQL92 PRIMARY KEY and UNIQUE clauses using indexes(Thomas)
+Recognize SQL92 syntax for FOREIGN KEY. Throw elog notice(Thomas)
+Allow NOT NULL UNIQUE constraint clause (each allowed separately before)(Thomas)
+Allow PostgreSQL-style casting ("::") of non-constants(Thomas)
+Add support for SQL3 TRUE and FALSE boolean constants(Thomas)
+Support SQL92 syntax for IS TRUE/IS FALSE/IS NOT TRUE/IS NOT FALSE(Thomas)
+Allow shorter strings for boolean literals (e.g. "t", "tr", "tru")(Thomas)
+Allow SQL92 delimited identifiers(Thomas)
+Implement SQL92 binary and hexadecimal string decoding (b'10' and x'1F')(Thomas)
+Support SQL92 syntax for type coercion of literal strings
+ (e.g. "DATETIME 'now'")(Thomas)
+Add conversions for int2, int4, and OID types to and from text(Thomas)
+Use shared lock when building indexes(Vadim)
+Free memory allocated for an user query inside transaction block after
+ this query is done, was turned off in <= 6.2.1(Vadim)
+New SQL statement CREATE PROCEDURAL LANGUAGE(Jan)
+New
PostgreSQL Procedural Language (PL) backend interface(Jan)
+Rename pg_dump -H option to -h(Bruce)
+Add Java support for passwords, European dates(Peter)
+Use indexes for LIKE and ~, !~ operations(Bruce)
+Add hash functions for datetime and timespan(Thomas)
+Time Travel removed(Vadim, Bruce)
+Add paging for \d and \z, and fix \i(Bruce)
+Add Unix domain socket support to backend and to frontend library(Goran)
+Implement CREATE DATABASE/WITH LOCATION and initlocation utility(Thomas)
+Allow more SQL92 and/or
PostgreSQL reserved words as column identifiers(Thomas)
+Augment support for SQL92 SET TIME ZONE...(Thomas)
+SET/SHOW/RESET TIME ZONE uses TZ backend environment variable(Thomas)
+Implement SET keyword = DEFAULT and SET TIME ZONE DEFAULT(Thomas)
+Enable SET TIME ZONE using TZ environment variable(Thomas)
+Add PGDATESTYLE environment variable to frontend and backend initialization(Thomas)
+Add PGTZ, PGCOSTHEAP, PGCOSTINDEX, PGRPLANS, PGGEQO
+ frontend library initialization environment variables(Thomas)
+Regression tests time zone automatically set with "setenv PGTZ PST8PDT"(Thomas)
+Add pg_description table for info on tables, columns, operators, types, and
+ aggregates(Bruce)
+Increase 16 char limit on system table/index names to 32 characters(Bruce)
+Rename system indexes(Bruce)
+Add 'GERMAN' option to SET DATESTYLE(Thomas)
+Define an "ISO-style" timespan output format with "hh:mm:ss" fields(Thomas)
+Allow fractional values for delta times (e.g. '2.5 days')(Thomas)
+Validate numeric input more carefully for delta times(Thomas)
+Implement day of year as possible input to date_part()(Thomas)
+Define timespan_finite() and text_timespan() functions(Thomas)
+Remove archive stuff(Bruce)
+Allow for a pg_password authentication database that is separate from
+ the system password file(Todd)
+Dump ACLs, GRANT, REVOKE privileges(Matt)
+Define text, varchar, and bpchar string length functions(Thomas)
+Fix Query handling for inheritance, and cost computations(Bruce)
+Implement CREATE TABLE/AS SELECT (alternative to SELECT/INTO)(Thomas)
+Allow NOT, IS NULL, IS NOT NULL in constraints(Thomas)
+Implement UNIONs for SELECT(Bruce)
+Add UNION, GROUP, DISTINCT to INSERT(Bruce)
+varchar() stores only necessary bytes on disk(Bruce)
+Fix for BLOBs(Peter)
+Mega-Patch for JDBC...see README_6.3 for list of changes(Peter)
+Remove unused "option" from PQconnectdb()
+New LOCK command and lock manual page describing deadlocks(Bruce)
+Add new psql \da, \dd, \df, \do, \dS, and \dT commands(Bruce)
+Enhance psql \z to show sequences(Bruce)
+Show NOT NULL and DEFAULT in psql \d table(Bruce)
+New psql .psqlrc file start-up(Andrew)
+Modify sample start-up script in contrib/linux to show syslog(Thomas)
+New types for IP and MAC addresses in contrib/ip_and_mac(TomH)
+Unix system time conversions with date/time types in contrib/unixdate(Thomas)
+Update of contrib stuff(Massimo)
+Add Unix socket support to DBD::Pg(Goran)
+New python interface (PyGreSQL 2.0)(D'Arcy)
+New frontend/backend protocol has a version number, network byte order(Phil)
+Security features in pg_hba.conf enhanced and documented, many cleanups(Phil)
+CHAR() now faster access than VARCHAR() or TEXT
+ecpg embedded SQL preprocessor
+Reduce system column overhead(Vadmin)
+Remove pg_time table(Vadim)
+Add pg_type attribute to identify types that need length (bpchar, varchar)
+Add report of offending line when COPY command fails
+Allow VIEW privileges to be set separately from the underlying tables.
+ For security, use GRANT/REVOKE on views as appropriate(Jan)
+Tables now have no default GRANT SELECT TO PUBLIC. You must
+ explicitly grant such privileges.
+Clean up tutorial examples(Darren)
+
+Source Tree Changes
+-------------------
+Add new html development tools, and flow chart in /tools/backend
+Fix for SCO compiles
+Stratus computer port Robert Gillies
+Added support for shlib for BSD44_derived & i386_solaris
+Make configure more automated(Brook)
+Add script to check regression test results
+Break parser functions into smaller files, group together(Bruce)
+Rename heap_create to heap_create_and_catalog, rename heap_creatr
+ to heap_create()(Bruce)
+Sparc/Linux patch for locking(TomS)
+Remove PORTNAME and reorganize port-specific stuff(Marc)
+Add optimizer README file(Bruce)
+Remove some recursion in optimizer and clean up some code there(Bruce)
+Fix for NetBSD locking(Henry)
+Fix for libptcl make(Tatsuo)
+AIX patch(Darren)
+Change IS TRUE, IS FALSE, ... to expressions using "=" rather than
+ function calls to istrue() or isfalse() to allow optimization(Thomas)
+Various fixes NetBSD/Sparc related(TomH)
+Alpha linux locking(Travis,Ryan)
+Change elog(WARN) to elog(ERROR)(Bruce)
+FAQ for FreeBSD(Marc)
+Bring in the PostODBC source tree as part of our standard distribution(Marc)
+A minor patch for HP/UX 10 vs 9(Stan)
+New pg_attribute.atttypmod for type-specific info like varchar length(Bruce)
+UnixWare patches(Billy)
+New i386 'lock' for spinlock asm(Billy)
+Support for multiplexed backends is removed
+Start an OpenBSD port
+Start an AUX port
+Start a Cygnus port
+Add string functions to regression suite(Thomas)
+Expand a few function names formerly truncated to 16 characters(Thomas)
+Remove un-needed malloc() calls and replace with palloc()(Bruce)
+
+
+
+
+
+
+
Release 6.2.1
+
+
+
Release date
+ 1997-10-17
+
+
+6.2.1 is a bug-fix and usability release on 6.2.
+
+Summary:
+
+
+
+Allow strings to span lines, per
SQL92 .
+
+
+
+
+Include example trigger function for inserting user names on table updates.
+
+
+
+
+
+This is a minor bug-fix release on 6.2.
+For upgrades from pre-6.2 systems, a full dump/reload is required.
+Refer to the 6.2 release notes for instructions.
+
+
+
+
Migration from version 6.2 to version 6.2.1
+
+This is a minor bug-fix release. A dump/reload is not required from version 6.2,
+but is required from any release prior to 6.2.
+
+In upgrading from version 6.2, if you choose to dump/reload you will find that
+avg(money) is now calculated correctly. All other bug fixes take effect
+upon updating the executables.
+
+Another way to avoid dump/reload is to use the following SQL command
+from psql to update the existing system table:
+
+ update pg_aggregate set aggfinalfn = 'cash_div_flt8'
+ where aggname = 'avg' and aggbasetype = 790;
+
+
+This will need to be done to every existing database, including template1.
+
+
+
+
+
Changes
+
+Allow TIME and TYPE column names(Thomas)
+Allow larger range of true/false as boolean values(Thomas)
+Support output of "now" and "current"(Thomas)
+Handle DEFAULT with INSERT of NULL properly(Vadim)
+Fix for relation reference counts problem in buffer manager(Vadim)
+Allow strings to span lines, like ANSI(Thomas)
+Fix for backward cursor with ORDER BY(Vadim)
+Fix avg(cash) computation(Thomas)
+Fix for specifying a column twice in ORDER/GROUP BY(Vadim)
+Documented new libpq function to return affected rows, PQcmdTuples(Bruce)
+Trigger function for inserting user names for INSERT/UPDATE(Brook Milligan)
+
+
+
+
+
+
+
Release 6.2
+
+
+
Release date
+ 1997-10-02
+
+
+A dump/restore is required for those wishing to migrate data from
+previous releases of
PostgreSQL .
+
+
+
+
Migration from version 6.1 to version 6.2
+
+This migration requires a complete dump of the 6.1 database and a
+restore of the database in 6.2.
+
+Note that the pg_dump and pg_dumpall utility from 6.2 should be used
+to dump the 6.1 database.
+
+
+
+
+
Migration from version 1.<replaceable>x</> to version 6.2
+
+Those migrating from earlier 1.* releases should first upgrade to 1.09
+because the COPY output format was improved from the 1.02 release.
+
+
+
+
+
Changes
+
+Bug Fixes
+---------
+Fix problems with pg_dump for inheritance, sequences, archive tables(Bruce)
+Fix compile errors on overflow due to shifts, unsigned, and bad prototypes
+ from Solaris(Diab Jerius)
+Fix bugs in geometric line arithmetic (bad intersection calculations)(Thomas)
+Check for geometric intersections at endpoints to avoid rounding ugliness(Thomas)
+Catch non-functional delete attempts(Vadim)
+Change time function names to be more consistent(Michael Reifenberg)
+Check for zero divides(Michael Reifenberg)
+Fix very old bug which made rows changed/inserted by a command
+ visible to the command itself (so we had multiple update of
+ updated rows, etc.)(Vadim)
+Fix for SELECT null, 'fail' FROM pg_am (Patrick)
+SELECT NULL as EMPTY_FIELD now allowed(Patrick)
+Remove un-needed signal stuff from contrib/pginterface
+Fix OR (where x != 1 or x isnull didn't return rows with x NULL) (Vadim)
+Fix time_cmp function (Vadim)
+Fix handling of functions with non-attribute first argument in
+ WHERE clauses (Vadim)
+Fix GROUP BY when order of entries is different from order
+ in target list (Vadim)
+Fix pg_dump for aggregates without sfunc1 (Vadim)
+
+Enhancements
+------------
+Default genetic optimizer GEQO parameter is now 8(Bruce)
+Allow use parameters in target list having aggregates in functions(Vadim)
+Added JDBC driver as an interface(Adrian & Peter)
+pg_password utility
+Return number of rows inserted/affected by INSERT/UPDATE/DELETE etc.(Vadim)
+Triggers implemented with CREATE TRIGGER (SQL3)(Vadim)
+SPI (Server Programming Interface) allows execution of queries inside
+ C-functions (Vadim)
+NOT NULL implemented (SQL92)(Robson Paniago de Miranda)
+Include reserved words for string handling, outer joins, and unions(Thomas)
+Implement extended comments ("/* ... */") using exclusive states(Thomas)
+Add "//" single-line comments(Bruce)
+Remove some restrictions on characters in operator names(Thomas)
+DEFAULT and CONSTRAINT for tables implemented (SQL92)(Vadim & Thomas)
+Add text concatenation operator and function (SQL92)(Thomas)
+Support WITH TIME ZONE syntax (SQL92)(Thomas)
+Support INTERVAL unit TO unit syntax (SQL92)(Thomas)
+Define types DOUBLE PRECISION, INTERVAL, CHARACTER,
+ and CHARACTER VARYING (SQL92)(Thomas)
+Define type FLOAT(p) and rudimentary DECIMAL(p,s), NUMERIC(p,s) (SQL92)(Thomas)
+Define EXTRACT(), POSITION(), SUBSTRING(), and TRIM() (SQL92)(Thomas)
+Define CURRENT_DATE, CURRENT_TIME, CURRENT_TIMESTAMP (SQL92)(Thomas)
+Add syntax and warnings for UNION, HAVING, INNER and OUTER JOIN (SQL92)(Thomas)
+Add more reserved words, mostly for SQL92 compliance(Thomas)
+Allow hh:mm:ss time entry for timespan/reltime types(Thomas)
+Add center() routines for lseg, path, polygon(Thomas)
+Add distance() routines for circle-polygon, polygon-polygon(Thomas)
+Check explicitly for points and polygons contained within polygons
+ using an axis-crossing algorithm(Thomas)
+Add routine to convert circle-box(Thomas)
+Merge conflicting operators for different geometric data types(Thomas)
+Replace distance operator "<===>" with "<->"(Thomas)
+Replace "above" operator "!^" with ">^" and "below" operator "!|" with "<^"(Thomas)
+Add routines for text trimming on both ends, substring, and string position(Thomas)
+Added conversion routines circle(box) and poly(circle)(Thomas)
+Allow internal sorts to be stored in memory rather than in files(Bruce & Vadim)
+Allow functions and operators on internally-identical types to succeed(Bruce)
+Speed up backend start-up after profiling analysis(Bruce)
+Inline frequently called functions for performance(Bruce)
+Reduce open() calls(Bruce)
+psql: Add PAGER for \h and \?,\C fix
+Fix for psql pager when no tty(Bruce)
+New entab utility(Bruce)
+General trigger functions for referential integrity (Vadim)
+General trigger functions for time travel (Vadim)
+General trigger functions for AUTOINCREMENT/IDENTITY feature (Vadim)
+MOVE implementation (Vadim)
+
+Source Tree Changes
+-------------------
+HP-UX 10 patches (Vladimir Turin)
+Added SCO support, (Daniel Harris)
+MkLinux patches (Tatsuo Ishii)
+Change geometric box terminology from "length" to "width"(Thomas)
+Deprecate temporary unstored slope fields in geometric code(Thomas)
+Remove restart instructions from INSTALL(Bruce)
+Look in /usr/ucb first for install(Bruce)
+Fix c++ copy example code(Thomas)
+Add -o to psql manual page(Bruce)
+Prevent relname unallocated string length from being copied into database(Bruce)
+Cleanup for NAMEDATALEN use(Bruce)
+Fix pg_proc names over 15 chars in output(Bruce)
+Add strNcpy() function(Bruce)
+remove some (void) casts that are unnecessary(Bruce)
+new interfaces directory(Marc)
+Replace fopen() calls with calls to fd.c functions(Bruce)
+Make functions static where possible(Bruce)
+enclose unused functions in #ifdef NOT_USED(Bruce)
+Remove call to difftime() in timestamp support to fix SunOS(Bruce & Thomas)
+Changes for Digital Unix
+Portability fix for pg_dumpall(Bruce)
+Rename pg_attribute.attnvals to attdispersion(Bruce)
+"intro/unix" manual page now "pgintro"(Bruce)
+"built-in" manual page now "pgbuiltin"(Bruce)
+"drop" manual page now "drop_table"(Bruce)
+Add "create_trigger", "drop_trigger" manual pages(Thomas)
+Add constraints regression test(Vadim & Thomas)
+Add comments syntax regression test(Thomas)
+Add PGINDENT and support program(Bruce)
+Massive commit to run PGINDENT on all *.c and *.h files(Bruce)
+Files moved to /src/tools directory(Bruce)
+SPI and Trigger programming guides (Vadim & D'Arcy)
+
+
+
+
+
+
+
Release 6.1.1
+
+
+
Release date
+ 1997-07-22
+
+
+
+
Migration from version 6.1 to version 6.1.1
+
+This is a minor bug-fix release. A dump/reload is not required from version 6.1,
+but is required from any release prior to 6.1.
+Refer to the release notes for 6.1 for more details.
+
+
+
+
+
Changes
+
+fix for SET with options (Thomas)
+allow pg_dump/pg_dumpall to preserve ownership of all tables/objects(Bruce)
+new psql \connect option allows changing usernames without changing databases
+fix for initdb --debug option(Yoshihiko Ichikawa))
+lextest cleanup(Bruce)
+hash fixes(Vadim)
+fix date/time month boundary arithmetic(Thomas)
+fix timezone daylight handling for some ports(Thomas, Bruce, Tatsuo)
+timestamp overhauled to use standard functions(Thomas)
+other code cleanup in date/time routines(Thomas)
+psql's \d now case-insensitive(Bruce)
+psql's backslash commands can now have trailing semicolon(Bruce)
+fix memory leak in psql when using \g(Bruce)
+major fix for endian handling of communication to server(Thomas, Tatsuo)
+Fix for Solaris assembler and include files(Yoshihiko Ichikawa)
+allow underscores in usernames(Bruce)
+pg_dumpall now returns proper status, portability fix(Bruce)
+
+
+
+
+
+
+
Release 6.1
+
+
+
Release date
+ 1997-06-08
+
+
+ The regression tests have been adapted and extensively modified for the
+ 6.1 release of
PostgreSQL .
+
+
+ Three new data types (datetime , timespan , and circle ) have been added to
+ the native set of
PostgreSQL types. Points, boxes, paths, and polygons
+ have had their output formats made consistent across the data types.
+ The polygon output in misc.out has only been spot-checked for correctness
+ relative to the original regression output.
+
+
+
PostgreSQL 6.1 introduces a new, alternate
+optimizer which uses genetic
+ algorithms. These algorithms introduce a random behavior in the ordering
+ of query results when the query contains multiple qualifiers or multiple
+ tables (giving the optimizer a choice on order of evaluation). Several
+ regression tests have been modified to explicitly order the results, and
+ hence are insensitive to optimizer choices. A few regression tests are
+ for data types which are inherently unordered (e.g. points and time
+ intervals) and tests involving those types are explicitly bracketed with
+ set geqo to 'off' and reset geqo .
+
+
+ The interpretation of array specifiers (the curly braces around atomic
+ values) appears to have changed sometime after the original regression
+ tests were generated. The current ./expected/*.out files reflect this
+ new interpretation, which might not be correct!
+
+
+ The float8 regression test fails on at least some platforms. This is due
+ to differences in implementations of pow() and exp() and the signaling
+ mechanisms used for overflow and underflow conditions.
+
+
+ The random results in the random test should cause the
+ random
test to be failed
, since the
+ regression tests are evaluated using a simple diff. However,
+ random does not seem to produce random results on my test
+ machine (Linux/
gcc/i686). +
+
+
+
Migration to Version 6.1
+
+This migration requires a complete dump of the 6.0 database and a
+restore of the database in 6.1.
+
+Those migrating from earlier 1.* releases should first upgrade to 1.09
+because the COPY output format was improved from the 1.02 release.
+
+
+
+
+
Changes
+
+Bug Fixes
+---------
+packet length checking in library routines
+lock manager priority patch
+check for under/over flow of float8(Bruce)
+multitable join fix(Vadim)
+SIGPIPE crash fix(Darren)
+large object fixes(Sven)
+allow btree indexes to handle NULLs(Vadim)
+timezone fixes(D'Arcy)
+select SUM(x) can return NULL on no rows(Thomas)
+internal optimizer, executor bug fixes(Vadim)
+fix problem where inner loop in < or <= has no rows(Vadim)
+prevent re-commuting join index clauses(Vadim)
+fix join clauses for multiple tables(Vadim)
+fix hash, hashjoin for arrays(Vadim)
+fix btree for abstime type(Vadim)
+large object fixes(Raymond)
+fix buffer leak in hash indexes (Vadim)
+fix rtree for use in inner scan (Vadim)
+fix gist for use in inner scan, cleanups (Vadim, Andrea)
+avoid unnecessary local buffers allocation (Vadim, Massimo)
+fix local buffers leak in transaction aborts (Vadim)
+fix file manager memmory leaks, cleanups (Vadim, Massimo)
+fix storage manager memmory leaks (Vadim)
+fix btree duplicates handling (Vadim)
+fix deleted rows reincarnation caused by vacuum (Vadim)
+fix SELECT varchar()/char() INTO TABLE made zero-length fields(Bruce)
+many psql, pg_dump, and libpq memory leaks fixed using Purify (Igor)
+
+Enhancements
+------------
+attribute optimization statistics(Bruce)
+much faster new btree bulk load code(Paul)
+BTREE UNIQUE added to bulk load code(Vadim)
+new lock debug code(Massimo)
+massive changes to libpg++(Leo)
+new GEQO optimizer speeds table multitable optimization(Martin)
+new WARN message for non-unique insert into unique key(Marc)
+update x=-3, no spaces, now valid(Bruce)
+remove case-sensitive identifier handling(Bruce,Thomas,Dan)
+debug backend now pretty-prints tree(Darren)
+new Oracle character functions(Edmund)
+new plaintext password functions(Dan)
+no such class or insufficient privilege changed to distinct messages(Dan)
+new ANSI timestamp function(Dan)
+new ANSI Time and Date types (Thomas)
+move large chunks of data in backend(Martin)
+multicolumn btree indexes(Vadim)
+new SET var TO value command(Martin)
+update transaction status on reads(Dan)
+new locale settings for character types(Oleg)
+new SEQUENCE serial number generator(Vadim)
+GROUP BY function now possible(Vadim)
+re-organize regression test(Thomas,Marc)
+new optimizer operation weights(Vadim)
+new psql \z grant/permit option(Marc)
+new MONEY data type(D'Arcy,Thomas)
+tcp socket communication speed improved(Vadim)
+new VACUUM option for attribute statistics, and for certain columns (Vadim)
+many geometric type improvements(Thomas,Keith)
+additional regression tests(Thomas)
+new datestyle variable(Thomas,Vadim,Martin)
+more comparison operators for sorting types(Thomas)
+new conversion functions(Thomas)
+new more compact btree format(Vadim)
+allow pg_dumpall to preserve database ownership(Bruce)
+new SET GEQO=# and R_PLANS variable(Vadim)
+old (!GEQO) optimizer can use right-sided plans (Vadim)
+typechecking improvement in SQL parser(Bruce)
+new SET, SHOW, RESET commands(Thomas,Vadim)
+new \connect database USER option
+new destroydb -i option (Igor)
+new \dt and \di psql commands (Darren)
+SELECT "\n" now escapes newline (A. Duursma)
+new geometry conversion functions from old format (Thomas)
+
+Source tree changes
+-------------------
+new configuration script(Marc)
+readline configuration option added(Marc)
+OS-specific configuration options removed(Marc)
+new OS-specific template files(Marc)
+no more need to edit Makefile.global(Marc)
+re-arrange include files(Marc)
+nextstep patches (Gregor Hoffleit)
+removed Windows-specific code(Bruce)
+removed postmaster -e option, now only postgres -e option (Bruce)
+merge duplicate library code in front/backends(Martin)
+now works with eBones, international Kerberos(Jun)
+more shared library support
+c++ include file cleanup(Bruce)
+warn about buggy flex(Bruce)
+DG/UX, Ultrix, IRIX, AIX portability fixes
+
+
+
+
+
+
+
Release 6.0
+
+
+
Release date
+ 1997-01-29
+
+
+A dump/restore is required for those wishing to migrate data from
+previous releases of
PostgreSQL .
+
+
+
+
Migration from version 1.09 to version 6.0
+
+This migration requires a complete dump of the 1.09 database and a
+restore of the database in 6.0.
+
+
+
+
+
Migration from pre-1.09 to version 6.0
+
+Those migrating from earlier 1.* releases should first upgrade to 1.09
+because the COPY output format was improved from the 1.02 release.
+
+
+
+
+
Changes
+
+Bug Fixes
+---------
+ALTER TABLE bug - running postgres process needs to re-read table definition
+Allow vacuum to be run on one table or entire database(Bruce)
+Array fixes
+Fix array over-runs of memory writes(Kurt)
+Fix elusive btree range/non-range bug(Dan)
+Fix for hash indexes on some types like time and date
+Fix for pg_log size explosion
+Fix permissions on lo_export()(Bruce)
+Fix uninitialized reads of memory(Kurt)
+Fixed ALTER TABLE ... char(3) bug(Bruce)
+Fixed a few small memory leaks
+Fixed EXPLAIN handling of options and changed full_path option name
+Fixed output of group acl privileges
+Memory leaks (hunt and destroy with tools like Purify(Kurt)
+Minor improvements to rules system
+NOTIFY fixes
+New asserts for run-checking
+Overhauled parser/analyze code to properly report errors and increase speed
+Pg_dump -d now handles NULL's properly(Bruce)
+Prevent SELECT NULL from crashing server (Bruce)
+Properly report errors when INSERT ... SELECT columns did not match
+Properly report errors when insert column names were not correct
+psql \g filename now works(Bruce)
+psql fixed problem with multiple statements on one line with multiple outputs
+Removed duplicate system OIDs
+SELECT * INTO TABLE . GROUP/ORDER BY gives unlink error if table exists(Bruce)
+Several fixes for queries that crashed the backend
+Starting quote in insert string errors(Bruce)
+Submitting an empty query now returns empty status, not just " " query(Bruce)
+
+Enhancements
+------------
+Add EXPLAIN manual page(Bruce)
+Add UNIQUE index capability(Dan)
+Add hostname/user level access control rather than just hostname and user
+Add synonym of != for <>(Bruce)
+Allow "select oid,* from table"
+Allow BY,ORDER BY to specify columns by number, or by non-alias table.column(Bruce)
+Allow COPY from the frontend(Bryan)
+Allow GROUP BY to use alias column name(Bruce)
+Allow actual compression, not just reuse on the same page(Vadim)
+Allow installation-configuration option to auto-add all local users(Bryan)
+Allow libpq to distinguish between text value '' and null(Bruce)
+Allow non-postgres users with createdb privs to destroydb's
+Allow restriction on who can create C functions(Bryan)
+Allow restriction on who can do backend COPY(Bryan)
+Can shrink tables, pg_time and pg_log(Vadim & Erich)
+Change debug level 2 to print queries only, changed debug heading layout(Bruce)
+Change default decimal constant representation from float4 to float8(Bruce)
+European date format now set when postmaster is started
+Execute lowercase function names if not found with exact case
+Fixes for aggregate/GROUP processing, allow 'select sum(func(x),sum(x+y) from z'
+Gist now included in the distribution(Marc)
+Idend authentication of local users(Bryan)
+Implement BETWEEN qualifier(Bruce)
+Implement IN qualifier(Bruce)
+libpq has PQgetisnull()(Bruce)
+libpq++ improvements
+New options to initdb(Bryan)
+Pg_dump allow dump of OIDs(Bruce)
+Pg_dump create indexes after tables are loaded for speed(Bruce)
+Pg_dumpall dumps all databases, and the user table
+Pginterface additions for NULL values(Bruce)
+Prevent postmaster from being run as root
+psql \h and \? is now readable(Bruce)
+psql allow backslashed, semicolons anywhere on the line(Bruce)
+psql changed command prompt for lines in query or in quotes(Bruce)
+psql char(3) now displays as (bp)char in \d output(Bruce)
+psql return code now more accurate(Bryan?)
+psql updated help syntax(Bruce)
+Re-visit and fix vacuum(Vadim)
+Reduce size of regression diffs, remove timezone name difference(Bruce)
+Remove compile-time parameters to enable binary distributions(Bryan)
+Reverse meaning of HBA masks(Bryan)
+Secure Authentication of local users(Bryan)
+Speed up vacuum(Vadim)
+Vacuum now had VERBOSE option(Bruce)
+
+Source tree changes
+-------------------
+All functions now have prototypes that are compared against the calls
+Allow asserts to be disabled easily from Makefile.global(Bruce)
+Change oid constants used in code to #define names
+Decoupled sparc and solaris defines(Kurt)
+Gcc -Wall compiles cleanly with warnings only from unfixable constructs
+Major include file reorganization/reduction(Marc)
+Make now stops on compile failure(Bryan)
+Makefile restructuring(Bryan, Marc)
+Merge bsdi_2_1 to bsdi(Bruce)
+Monitor program removed
+Name change from Postgres95 to PostgreSQL
+New config.h file(Marc, Bryan)
+PG_VERSION now set to 6.0 and used by postmaster
+Portability additions, including Ultrix, DG/UX, AIX, and Solaris
+Reduced the number of #define's, centralized #define's
+Remove duplicate OIDS in system tables(Dan)
+Remove duplicate system catalog info or report mismatches(Dan)
+Removed many os-specific #define's
+Restructured object file generation/location(Bryan, Marc)
+Restructured port-specific file locations(Bryan, Marc)
+Unused/uninitialized variables corrected
+
+
+
+
+
+
+
Release 1.09
+
+
+
Release date
+ 1996-11-04
+
+
+Sorry, we didn't keep track of changes from 1.02 to 1.09. Some of
+the changes listed in 6.0 were actually included in the 1.02.1 to 1.09
+releases.
+
+
+
+
+
Release 1.02
+
+
+
Release date
+ 1996-08-01
+
+
+
+
Migration from version 1.02 to version 1.02.1
+
+Here is a new migration file for 1.02.1. It includes the 'copy' change
+and a script to convert old
ASCII files.
+
+
+The following notes are for the benefit of users who want to migrate
+databases from
Postgres95 1.01 and 1.02 to Postgres95 1.02.1. +
+If you are starting afresh with
Postgres95 1.02.1 and do not need +to migrate old databases, you do not need to read any further.
+
+
+
+In order to upgrade older
Postgres95 version 1.01 or 1.02 databases to +version 1.02.1, the following steps are required:
+
+
+Start up a new 1.02.1 postmaster
+
+
+
+Add the new built-in functions and operators of 1.02.1 to 1.01 or 1.02
+ databases. This is done by running the new 1.02.1 server against
+ your own 1.01 or 1.02 database and applying the queries attached at
+ the end of the file. This can be done easily through psql. If your
+ 1.01 or 1.02 database is named testdb and you have cut the commands
+ from the end of this file and saved them in addfunc.sql :
+ % psql testdb -f addfunc.sql
+
+
+Those upgrading 1.02 databases will get a warning when executing the
+last two statements in the file because they are already present in 1.02. This is
+not a cause for concern.
+
+
+
+
+
+
+
Dump/Reload Procedure
+
+If you are trying to reload a pg_dump or text-mode, copy tablename to
+stdout generated with a previous version, you will need to run the
+attached sed script on the ASCII file before loading it into the
+database. The old format used '.' as end-of-data, while '\.' is now the
+end-of-data marker. Also, empty strings are now loaded in as '' rather
+than NULL. See the copy manual page for full details.
+
+ sed 's/^\.$/\\./g' <in_file >out_file
+
+
+If you are loading an older binary copy or non-stdout copy, there is no
+end-of-data character, and hence no conversion necessary.
+
+-- following lines added by agc to reflect the case-insensitive
+-- regexp searching for varchar (in 1.02), and bpchar (in 1.02.1)
+create operator ~* (leftarg = bpchar, rightarg = text, procedure = texticregexeq);
+create operator !~* (leftarg = bpchar, rightarg = text, procedure = texticregexne);
+create operator ~* (leftarg = varchar, rightarg = text, procedure = texticregexeq);
+create operator !~* (leftarg = varchar, rightarg = text, procedure = texticregexne);
+
+
+
+
+
+
Changes
+
+Source code maintenance and development
+ * worldwide team of volunteers
+ * the source tree now in CVS at ftp.ki.net
+
+Enhancements
+ * psql (and underlying libpq library) now has many more options for
+ formatting output, including HTML
+ * pg_dump now output the schema and/or the data, with many fixes to
+ enhance completeness.
+ * psql used in place of monitor in administration shell scripts.
+ monitor to be deprecated in next release.
+ * date/time functions enhanced
+ * NULL insert/update/comparison fixed/enhanced
+ * TCL/TK lib and shell fixed to work with both tck7.4/tk4.0 and tcl7.5/tk4.1
+
+Bug Fixes (almost too numerous to mention)
+ * indexes
+ * storage management
+ * check for NULL pointer before dereferencing
+ * Makefile fixes
+
+New Ports
+ * added SolarisX86 port
+ * added BSD/OS 2.1 port
+ * added DG/UX port
+
+
+
+
+
+
+
+
Release 1.01
+
+
+
Release date
+ 1996-02-23
+
+
+
+
+
Migration from version 1.0 to version 1.01
+
+The following notes are for the benefit of users who want to migrate
+databases from
Postgres95 1.0 to Postgres95 1.01. +
+If you are starting afresh with
Postgres95 1.01 and do not need +to migrate old databases, you do not need to read any further.
+
+In order to
Postgres95 version 1.01 with databases created with +
Postgres95 version 1.0, the following steps are required: +
+
+Set the definition of NAMEDATALEN in src/Makefile.global to 16
+ and OIDNAMELEN to 20.
+
+
+
+Decide whether you want to use Host based authentication.
+
+
+
+If you do, you must create a file name pg_hba in your top-level data
+ directory (typically the value of your $PGDATA ). src/libpq/pg_hba
+ shows an example syntax.
+
+
+
+If you do not want host-based authentication, you can comment out
+ the line:
+ HBA = 1
+
+ in src/Makefile.global
+
+ Note that host-based authentication is turned on by default, and if
+ you do not take steps A or B above, the out-of-the-box 1.01 will
+ not allow you to connect to 1.0 databases.
+
+
+
+
+
+
+Compile and install 1.01, but DO NOT do the initdb step.
+
+
+
+Before doing anything else, terminate your 1.0 postmaster, and
+ backup your existing $PGDATA directory.
+
+
+
+Set your PGDATA environment variable to your 1.0 databases, but set up
+ path up so that 1.01 binaries are being used.
+
+
+
+Modify the file $PGDATA /PG_VERSION
+
+
+
+Start up a new 1.01 postmaster
+
+
+
+Add the new built-in functions and operators of 1.01 to 1.0
+ databases. This is done by running the new 1.01 server against
+ your own 1.0 database and applying the queries attached and saving
+ in the file 1.0_to_1.01.sql. This can be done easily through psql .
+ If your 1.0 database is name testdb :
+
+ % psql testdb -f 1.0_to_1.01.sql
+
+
+and then execute the following commands (cut and paste from here):
+
+-- add builtin functions that are new to 1.01
+
+create function int4eqoid (int4, oid) returns bool as 'foo'
+language 'internal';
+create function oideqint4 (oid, int4) returns bool as 'foo'
+language 'internal';
+create function char2icregexeq (char2, text) returns bool as 'foo'
+language 'internal';
+create function char2icregexne (char2, text) returns bool as 'foo'
+language 'internal';
+create function char4icregexeq (char4, text) returns bool as 'foo'
+language 'internal';
+create function char4icregexne (char4, text) returns bool as 'foo'
+language 'internal';
+create function char8icregexeq (char8, text) returns bool as 'foo'
+language 'internal';
+create function char8icregexne (char8, text) returns bool as 'foo'
+language 'internal';
+create function char16icregexeq (char16, text) returns bool as 'foo'
+language 'internal';
+create function char16icregexne (char16, text) returns bool as 'foo'
+language 'internal';
+create function texticregexeq (text, text) returns bool as 'foo'
+language 'internal';
+create function texticregexne (text, text) returns bool as 'foo'
+language 'internal';
+
+-- add builtin functions that are new to 1.01
+
+create operator = (leftarg = int4, rightarg = oid, procedure = int4eqoid);
+create operator = (leftarg = oid, rightarg = int4, procedure = oideqint4);
+create operator ~* (leftarg = char2, rightarg = text, procedure = char2icregexeq);
+create operator !~* (leftarg = char2, rightarg = text, procedure = char2icregexne);
+create operator ~* (leftarg = char4, rightarg = text, procedure = char4icregexeq);
+create operator !~* (leftarg = char4, rightarg = text, procedure = char4icregexne);
+create operator ~* (leftarg = char8, rightarg = text, procedure = char8icregexeq);
+create operator !~* (leftarg = char8, rightarg = text, procedure = char8icregexne);
+create operator ~* (leftarg = char16, rightarg = text, procedure = char16icregexeq);
+create operator !~* (leftarg = char16, rightarg = text, procedure = char16icregexne);
+create operator ~* (leftarg = text, rightarg = text, procedure = texticregexeq);
+create operator !~* (leftarg = text, rightarg = text, procedure = texticregexne);
+
+
+
+
+
+
+
+
Changes
+
+Incompatibilities:
+ * 1.01 is backwards compatible with 1.0 database provided the user
+ follow the steps outlined in the MIGRATION_from_1.0_to_1.01 file.
+ If those steps are not taken, 1.01 is not compatible with 1.0 database.
+
+Enhancements:
+ * added PQdisplayTuples() to libpq and changed monitor and psql to use it
+ * added NeXT port (requires SysVIPC implementation)
+ * added CAST .. AS ... syntax
+ * added ASC and DESC key words
+ * added 'internal' as a possible language for CREATE FUNCTION
+ internal functions are C functions which have been statically linked
+ into the postgres backend.
+ * a new type "name" has been added for system identifiers (table names,
+ attribute names, etc.) This replaces the old char16 type. The
+ of name is set by the NAMEDATALEN #define in src/Makefile.global
+ * a readable reference manual that describes the query language.
+ * added host-based access control. A configuration file ($PGDATA/pg_hba)
+ is used to hold the configuration data. If host-based access control
+ is not desired, comment out HBA=1 in src/Makefile.global.
+ * changed regex handling to be uniform use of Henry Spencer's regex code
+ regardless of platform. The regex code is included in the distribution
+ * added functions and operators for case-insensitive regular expressions.
+ The operators are ~* and !~*.
+ * pg_dump uses COPY instead of SELECT loop for better performance
+
+Bug fixes:
+ * fixed an optimizer bug that was causing core dumps when
+ functions calls were used in comparisons in the WHERE clause
+ * changed all uses of getuid to geteuid so that effective uids are used
+ * psql now returns non-zero status on errors when using -c
+ * applied public patches 1-14
+
+
+
+
+
+
+
Release 1.0
+
+
+
Release date
+ 1995-09-05
+
+
+
+
Changes
+
+Copyright change:
+ * The copyright of
Postgres 1.0 has been loosened to be freely modifiable
+ and modifiable for any purpose. Please read the COPYRIGHT file.
+ Thanks to Professor Michael Stonebraker for making this possible.
+
+Incompatibilities:
+ * date formats have to be MM-DD-YYYY (or DD-MM-YYYY if you're using
+ EUROPEAN STYLE). This follows SQL-92 specs.
+ * "delimiters" is now a key word
+
+Enhancements:
+ * sql LIKE syntax has been added
+ * copy command now takes an optional USING DELIMITER specification.
+ delimiters can be any single-character string.
+ * IRIX 5.3 port has been added.
+ Thanks to Paul Walmsley and others.
+ * updated pg_dump to work with new libpq
+ * \d has been added psql
+ Thanks to Keith Parks
+ * regexp performance for architectures that use POSIX regex has been
+ improved due to caching of precompiled patterns.
+ Thanks to Alistair Crooks
+ * a new version of libpq++
+ Thanks to William Wanders
+
+Bug fixes:
+ * arbitrary userids can be specified in the createuser script
+ * \c to connect to other databases in psql now works.
+ * bad pg_proc entry for float4inc() is fixed
+ * users with usecreatedb field set can now create databases without
+ having to be usesuper
+ * remove access control entries when the entry no longer has any
+ privileges
+ * fixed non-portable datetimes implementation
+ * added kerberos flags to the src/backend/Makefile
+ * libpq now works with kerberos
+ * typographic errors in the user manual have been corrected.
+ * btrees with multiple index never worked, now we tell you they don't
+ work when you try to use them
+
+
+
+
+
+
+
<productname>Postgres95</productname> Release 0.03
+
+
+
Release date
+ 1995-07-21
+
+
+
+
Changes
+Incompatible changes:
+ * BETA-0.3 IS INCOMPATIBLE WITH DATABASES CREATED WITH PREVIOUS VERSIONS
+ (due to system catalog changes and indexing structure changes).
+ * double-quote (") is deprecated as a quoting character for string literals;
+ you need to convert them to single quotes (').
+ * name of aggregates (eg. int4sum) are renamed in accordance with the
+ SQL standard (eg. sum).
+ * CHANGE ACL syntax is replaced by GRANT/REVOKE syntax.
+ * float literals (eg. 3.14) are now of type float4 (instead of float8 in
+ previous releases); you might have to do typecasting if you depend on it
+ being of type float8. If you neglect to do the typecasting and you assign
+ a float literal to a field of type float8, you might get incorrect values
+ stored!
+ * LIBPQ has been totally revamped so that frontend applications
+ can connect to multiple backends
+ * the usesysid field in pg_user has been changed from int2 to int4 to
+ allow wider range of Unix user ids.
+ * the netbsd/freebsd/bsd o/s ports have been consolidated into a
+ single BSD44_derived port. (thanks to Alistair Crooks)
+
+SQL standard-compliance (the following details changes that makes postgres95
+more compliant to the SQL-92 standard):
+ * the following SQL types are now built-in: smallint, int(eger), float, real,
+ char(N), varchar(N), date and time.
+
+ The following are aliases to existing postgres types:
+ smallint -> int2
+ integer, int -> int4
+ float, real -> float4
+ char(N) and varchar(N) are implemented as truncated text types. In
+ addition, char(N) does blank-padding.
+ * single-quote (') is used for quoting string literals; '' (in addition to
+ \') is supported as means of inserting a single quote in a string
+ * SQL standard aggregate names (MAX, MIN, AVG, SUM, COUNT) are used
+ (Also, aggregates can now be overloaded, i.e. you can define your
+ own MAX aggregate to take in a user-defined type.)
+ * CHANGE ACL removed. GRANT/REVOKE syntax added.
+ - Privileges can be given to a group using the "GROUP" key word.
+ For example:
+ GRANT SELECT ON foobar TO GROUP my_group;
+ The key word 'PUBLIC' is also supported to mean all users.
+
+ Privileges can only be granted or revoked to one user or group
+ at a time.
+
+ "WITH GRANT OPTION" is not supported. Only class owners can change
+ access control
+ - The default access control is to grant users readonly access.
+ You must explicitly grant insert/update access to users. To change
+ this, modify the line in
+ src/backend/utils/acl.h
+ that defines ACL_WORLD_DEFAULT
+
+Bug fixes:
+ * the bug where aggregates of empty tables were not run has been fixed. Now,
+ aggregates run on empty tables will return the initial conditions of the
+ aggregates. Thus, COUNT of an empty table will now properly return 0.
+ MAX/MIN of an empty table will return a row of value NULL.
+ * allow the use of \; inside the monitor
+ * the LISTEN/NOTIFY asynchronous notification mechanism now work
+ * NOTIFY in rule action bodies now work
+ * hash indexes work, and access methods in general should perform better.
+ creation of large btree indexes should be much faster. (thanks to Paul
+ Aoki)
+
+Other changes and enhancements:
+ * addition of an EXPLAIN statement used for explaining the query execution
+ plan (eg. "EXPLAIN SELECT * FROM EMP" prints out the execution plan for
+ the query).
+ * WARN and NOTICE messages no longer have timestamps on them. To turn on
+ timestamps of error messages, uncomment the line in
+ src/backend/utils/elog.h:
+ /* define ELOG_TIMESTAMPS */
+ * On an access control violation, the message
+ "Either no such class or insufficient privilege"
+ will be given. This is the same message that is returned when
+ a class is not found. This dissuades non-privileged users from
+ guessing the existence of privileged classes.
+ * some additional system catalog changes have been made that are not
+ visible to the user.
+
+libpgtcl changes:
+ * The -oid option has been added to the "pg_result" tcl command.
+ pg_result -oid returns oid of the last row inserted. If the
+ last command was not an INSERT, then pg_result -oid returns "".
+ * the large object interface is available as pg_lo* tcl commands:
+ pg_lo_open, pg_lo_close, pg_lo_creat, etc.
+
+Portability enhancements and New Ports:
+ * flex/lex problems have been cleared up. Now, you should be able to use
+ flex instead of lex on any platforms. We no longer make assumptions of
+ what lexer you use based on the platform you use.
+ * The Linux-ELF port is now supported. Various configuration have been
+ tested: The following configuration is known to work:
+ kernel 1.2.10, gcc 2.6.3, libc 4.7.2, flex 2.5.2, bison 1.24
+ with everything in ELF format,
+
+New utilities:
+ * ipcclean added to the distribution
+ ipcclean usually does not need to be run, but if your backend crashes
+ and leaves shared memory segments hanging around, ipcclean will
+ clean them up for you.
+
+New documentation:
+ * the user manual has been revised and libpq documentation added.
+
+
+
+
+
+
+
<productname>Postgres95</productname> Release 0.02
+
+
+
Release date
+ 1995-05-25
+
+
+
+
Changes
+
+Incompatible changes:
+ * The SQL statement for creating a database is 'CREATE DATABASE' instead
+ of 'CREATEDB'. Similarly, dropping a database is 'DROP DATABASE' instead
+ of 'DESTROYDB'. However, the names of the executables 'createdb' and
+ 'destroydb' remain the same.
+
+New tools:
+ * pgperl - a Perl (4.036) interface to Postgres95
+ * pg_dump - a utility for dumping out a postgres database into a
+ script file containing query commands. The script files are in a ASCII
+ format and can be used to reconstruct the database, even on other
+ machines and other architectures. (Also good for converting
+ a Postgres 4.2 database to Postgres95 database.)
+
+The following ports have been incorporated into postgres95-beta-0.02:
+ * the NetBSD port by Alistair Crooks
+ * the AIX port by Mike Tung
+ * the Windows NT port by Jon Forrest (more stuff but not done yet)
+ * the Linux ELF port by Brian Gallew
+
+The following bugs have been fixed in postgres95-beta-0.02:
+ * new lines not escaped in COPY OUT and problem with COPY OUT when first
+ attribute is a '.'
+ * cannot type return to use the default user id in createuser
+ * SELECT DISTINCT on big tables crashes
+ * Linux installation problems
+ * monitor doesn't allow use of 'localhost' as PGHOST
+ * psql core dumps when doing \c or \l
+ * the "pgtclsh" target missing from src/bin/pgtclsh/Makefile
+ * libpgtcl has a hard-wired default port number
+ * SELECT DISTINCT INTO TABLE hangs
+ * CREATE TYPE doesn't accept 'variable' as the internallength
+ * wrong result using more than 1 aggregate in a SELECT
+
+
+
+
+
+
+
<productname>Postgres95</productname> Release 0.01
+
+
+
Release date
+ 1995-05-01
+
+
+Initial release.
+
+
+
+
+
+
Timing Results
+
+ These timing results are from running the regression test with the commands
+
+% cd src/test/regress
+% make all
+% time make runtest
+
+
+ Timing under Linux 2.0.27 seems to have a roughly 5% variation from run
+ to run, presumably due to the scheduling vagaries of multitasking systems.
+
+
+
+
Version 6.5
+
+ As has been the case for previous releases, timing between
+ releases is not directly comparable since new regression tests
+ have been added. In general, 6.5 is faster than previous
+ releases.
+
+
+ Timing with fsync() disabled:
+
+ Time System
+ 02:00 Dual Pentium Pro 180, 224MB, UW-SCSI, Linux 2.0.36, gcc 2.7.2.3 -O2 -m486
+ 04:38 Sparc Ultra 1 143MHz, 64MB, Solaris 2.6
+
+
+
+ Timing with fsync() enabled:
+
+ Time System
+ 04:21 Dual Pentium Pro 180, 224MB, UW-SCSI, Linux 2.0.36, gcc 2.7.2.3 -O2 -m486
+
+
+ For the
Linux system above, using UW-SCSI disks rather than (older) IDE + disks leads to a 50% improvement in speed on the regression test.
+
+
+
+
+
Version 6.4beta
+
+The times for this release are not directly comparable to those for previous releases
+since some additional regression tests have been included.
+In general, however, 6.4 should be slightly faster than the previous release (thanks, Bruce!).
+
+ Time System
+ 02:26 Dual Pentium Pro 180, 96MB, UW-SCSI, Linux 2.0.30, gcc 2.7.2.1 -O2 -m486
+
+
+
+
+
+
Version 6.3
+
+The times for this release are not directly comparable to those for previous releases
+since some additional regression tests have been included and some obsolete tests involving
+time travel have been removed.
+In general, however, 6.3 is substantially faster than previous releases (thanks, Bruce!).
+
+ Time System
+ 02:30 Dual Pentium Pro 180, 96MB, UW-SCSI, Linux 2.0.30, gcc 2.7.2.1 -O2 -m486
+ 04:12 Dual Pentium Pro 180, 96MB, EIDE, Linux 2.0.30, gcc 2.7.2.1 -O2 -m486
+
+
+
+
+
+
Version 6.1
+
+ Time System
+ 06:12 Pentium Pro 180, 32MB, EIDE, Linux 2.0.30, gcc 2.7.2 -O2 -m486
+ 12:06 P-100, 48MB, Linux 2.0.29, gcc
+ 39:58 Sparc IPC 32MB, Solaris 2.5, gcc 2.7.2.1 -O -g
+
+
+
+
+]]>
-
+
review, so each item is truly a community effort.
-
-
Release 8.4
-
-
-
Release date
- 2009-??-??, ITEMS CURRENT AS OF 2009-04-08
-
-
-
-
Overview
-
- After many years of development,
PostgreSQL has - become feature-complete in many areas. This release shows a
- targeted approach to adding features (e.g., authentication,
- monitoring, space reuse), and adds capabilities defined in the
- later SQL standards. The major areas of enhancement are:
-
-
-
-
-
-
-
- Windowing Functions
-
-
-
-
- Common Table Expressions and Recursive Joins
-
-
-
-
- Default and variadic parameters for functions
-
-
-
-
- Parallel Restore
-
-
-
-
- Column Permissions
-
-
-
-
- Per-database locale settings
-
-
-
-
- Improved hash indexes
-
-
-
-
- Improved join performance for EXISTS and NOT EXISTS queries
-
-
-
-
- Easier-to-use Warm Standby
-
-
-
-
- Automatic sizing of the Free Space Map
-
-
-
-
- Visibility Map (greatly reduces vacuum overhead for slowly-changing tables)
-
-
-
-
- Version-aware psql (backslash commands work against older servers)
-
-
-
-
- Support SSL certificates for user authentication
-
-
-
-
- Per-function runtime statistics
-
-
-
-
- Easy editing of functions in psql
-
-
-
-
- New contrib modules: pg_stat_statements, auto_explain, citext, btree_gin
-
-
-
-
-
- The above items are explained in more detail in the sections below.
-
-
-
-
-
-
Migration to Version 8.4
-
- A dump/restore using
pg_dump is
- required for those wishing to migrate data from any previous
- release.
-
-
- Observe the following incompatibilities:
-
-
-
-
General
-
-
-
- Use 64-bit integer datetimes by default (Neil Conway)
-
-
- Previously this was selected by
configure's - --enable-integer-datetimes option. To retain
- the old behavior, build with --disable-integer-datetimes.
-
-
-
-
- Remove
ipcclean utility command (Bruce) -
-
- The utility only worked on a few platforms. Users should use
- their operating system tools instead.
-
-
-
-
-
-
-
-
-
Server Settings
-
-
-
- Change default setting for
- log_min_messages to warning (previously
- it was notice) to reduce log file volume (Tom)
-
-
-
-
- Make debug_print_parse, debug_print_rewritten,
- and debug_print_plan
- output appear at LOG message level, not
- DEBUG1 as formerly (Tom)
-
-
-
-
- Make debug_pretty_print default to on (Tom)
-
-
-
-
- Remove explain_pretty_print parameter (no longer needed) (Tom)
-
-
-
-
- Make log_temp_files settable by superusers only, like other
- logging options (Simon Riggs)
-
-
-
-
- Remove automatic appending of the epoch timestamp when no %
- escapes are present in log_filename (Robert Haas)
-
-
- This change was made because some users wanted a fixed log filename,
- for use with an external log rotation tool.
-
-
-
-
- Remove log_restartpoints from recovery.conf;
- instead use log_checkpoints (Simon)
-
-
-
-
- Remove support for the (insecure) crypt authentication method
- (Magnus)
-
-
- This effectively obsoletes pre-
PostgreSQL 7.2 client - libraries, as there is no longer any non-plaintext password method that
- they can use.
-
-
-
-
- Remove krb_realm and krb_server_hostname;
- these are now set in pg_hba.conf instead (Magnus)
-
-
-
-
- There are also significant changes in
- linkend="release-8-4-pg-hba-conf">pg_hba.conf,
- as described below.
-
-
-
-
-
-
-
-
-
Queries
-
-
-
-
- Change TRUNCATE and LOCK to
- apply to child tables of the specified table(s) (Peter)
-
-
- These commands now accept an ONLY option that prevents
- processing child tables; this option must be used if the old
- behavior is needed.
-
-
-
-
- SELECT DISTINCT and
- UNION/INTERSECT/EXCEPT
- no longer always produce sorted output (Tom)
-
-
- Previously, these types of queries always removed duplicate rows
- by means of Sort/Unique processing (i.e., sort then remove adjacent
- duplicates). Now they can be implemented by hashing, which will not
- produce sorted output. If an application relied on the output being
- in sorted order, the recommended fix is to add an ORDER BY
- clause. As a short-term workaround, the previous behavior can be
- restored by disabling enable_hashagg, but that is a very
- performance-expensive fix. SELECT DISTINCT ON never uses
- hashing, however, so its behavior is unchanged.
-
-
-
-
- Force child tables to inherit CHECK constraints from parents
- (Alex Hunsaker, Nikhil Sontakke, Tom)
-
-
- Formerly it was possible to drop such a constraint from a child
- table, allowing rows that violate the constraint to be visible
- when scanning the parent table. This was deemed inconsistent,
- as well as contrary to SQL standard.
-
-
-
-
- Disallow negative LIMIT or OFFSET
- values, rather than treating them as zero (Simon)
-
-
-
-
- Disallow LOCK TABLE outside a transaction block
- (Tom)
-
-
- Such an operation is useless because the lock would be released
- immediately.
-
-
-
-
- Sequences now contain an additional start_value column
- (Zoltan Boszormenyi)
-
-
- This supports ALTER SEQUENCE ... RESTART.
-
-
-
-
-
-
-
-
-
-
Functions and Operators
-
-
-
-
- Make numeric zero raised to a fractional power return
- 0, rather than throwing an error, and make
- numeric zero raised to the zero power return 1,
- rather than error (Bruce)
-
-
- This matches the longstanding float8 behavior.
-
-
-
-
- Allow unary minus of floating-point values to produce minus zero (Tom)
-
-
- The changed behavior is more
IEEE-standard - compliant.
-
-
-
-
- Throw an error if an escape character is the last character in
- a LIKE pattern (i.e., it has nothing to escape) (Tom)
-
-
- Previously, such an escape character was silently ignored,
- thus possibly masking application logic errors.
-
-
-
-
- Remove ~=~ and ~<>~ operators
- formerly used for LIKE index comparisons (Tom)
-
-
- Pattern indexes now use the regular equality operator.
-
-
-
-
-
xpath() now passes its arguments to libxml - without any changes (Andrew)
-
-
- This means that the XML argument must be a well-formed XML document.
- The previous coding attempted to allow XML fragments, but it did not
- work well.
-
-
-
-
- Make xmlelement() format attribute values just like
- content values (Peter)
-
-
- Previously, attribute values were formatted according to the
- normal SQL output behavior, which is sometimes at odds with
- XML rules.
-
-
-
-
- Adopt a faster algorithm for hash functions (Kenneth Marshall,
- based on work of Bob Jenkins)
-
-
- Many of the built-in hash functions now deliver different results on
- little-endian and big-endian platforms.
-
-
-
-
-
-
-
Temporal Functions and Operators
-
-
-
-
- DateStyle no longer controls interval output
- formatting; instead there is a new variable IntervalStyle
- (Ron Mayer)
-
-
-
-
- Improve consistency of handling of fractional seconds in
- timestamp and interval output (Ron Mayer)
-
-
- This may result in displaying a different number of fractional
- digits than before, or rounding instead of truncating.
-
-
-
-
- Make to_char()'s localized month/day names depend
- on LC_TIME, not LC_MESSAGES (Euler
- Taveira de Oliveira)
-
-
-
-
- Cause to_date() and to_timestamp()
- to more consistently report errors for invalid input (Brendan
- Jurd)
-
-
- Previous versions would often ignore or silently misread input
- that did not match the format string. Such cases will now
- result in an error.
-
-
-
-
- Fix to_timestamp() to not require upper/lower case
- matching for meridian (AM/PM) and era
- (BC/AD) format designations (Brendan
- Jurd)
-
-
- For example, input value ad now matches the format
- string AD.
-
-
-
-
-
-
-
-
-
-
-
-
-
Changes
-
- Below you will find a detailed account of the changes between
-
PostgreSQL 8.4 and the previous major
- release.
-
-
-
-
Performance
-
-
-
- Improve optimizer statistics calculations (Jan Urbanski, Tom)
-
-
- In particular, estimates for full-text-search operators are
- greatly improved.
-
-
-
-
- Allow SELECT DISTINCT and
- UNION/INTERSECT/EXCEPT to
- use hashing (Tom)
-
-
- This means that these types of queries no longer automatically
- produce sorted output.
-
-
-
-
- Create explicit concepts of semi-joins and anti-joins (Tom)
-
-
- This work formalizes our previous ad-hoc treatment of IN
- (SELECT ...) clauses, and extends it to EXISTS and
- NOT EXISTS clauses. It should result in significantly
- better planning of EXISTS and NOT EXISTS
- queries. In general, logically equivalent IN and
- EXISTS clauses should now have similar performance,
- whereas previously IN often won.
-
-
-
-
- Improve optimization of sub-selects beneath outer joins (Tom)
-
-
- Formerly, a sub-select or view could not be optimized very well if it
- appeared within the nullable side of an outer join and contained
- non-strict expressions (for instance, constants) in its result list.
-
-
-
-
- Improve the performance of text_position() and
- related functions by using Boyer-Moore-Horspool searching (David
- Rowley)
-
-
- This is particularly helpful for long search patterns.
-
-
-
-
- Reduce I/O load of writing the statistics collection file
- by writing the file only when requested (Martin Pihlak)
-
-
-
-
- Improve performance for bulk inserts (Robert Haas, Simon)
-
-
-
-
- Increase the default value of default_statistics_target
- from 10 to 100 (Greg Sabino Mullane,
- Tom)
-
-
- The maximum value was also increased from 1000 to
- 10000.
-
-
-
-
- Perform constraint_exclusion checking by default
- in queries involving inheritance or UNION ALL (Tom)
-
-
- A new constraint_exclusion setting,
- partition, was added to specify this behavior.
-
-
-
-
- Allow I/O read-ahead for bitmap index scans (Greg Stark)
-
-
- The amount of read-ahead is controlled by
- effective_io_concurrency. This feature is available only
- if the kernel has posix_fadvise() support.
-
-
-
-
- Inline simple set-returning
SQL functions in - FROM clauses (Richard Rowell)
-
-
-
-
- Improve performance of multi-batch hash joins by providing a special
- case for join key values that are especially common in the outer
- relation (Bryce Cutt, Ramon Lawrence)
-
-
-
-
- Reduce volume of temporary data in multi-batch hash joins
- by suppressing physical tlist optimization (Michael
- Henderson, Ramon Lawrence)
-
-
-
-
- Avoid waiting for idle-in-transaction sessions during
- CREATE INDEX CONCURRENTLY (Simon)
-
-
-
-
- Improve performance of shared cache invalidation (Tom)
-
-
-
-
-
-
-
-
-
Server
-
-
-
Settings
-
-
-
-
- Convert many postgresql.conf settings to enumerated
- values so that pg_settings can display the valid
- values (Magnus)
-
-
-
-
- Add cursor_tuple_fraction parameter to control the
- fraction of a cursor's rows that the planner assumes will be
- fetched (Robert Hell)
-
-
-
-
- Allow underscores in the names of custom variable
- classes in postgresql.conf (Tom)
-
-
-
-
-
-
-
-
-
Authentication
-
-
-
- Report appropriate error message for combination of MD5
- authentication and db_user_namespace enabled (Bruce)
-
-
-
-
- Support regular expressions in pg_ident.conf
- (Magnus)
-
-
-
-
- Allow
Kerberos/GSSAPI parameters - to be changed without restarting the postmaster (Magnus)
-
-
-
-
-
-
-
-
-
<filename>pg_hba.conf</>
-
-
-
- Parse pg_hba.conf fully when it is loaded,
- so that errors are reported immediately (Magnus)
-
-
- Previously, most errors in the file wouldn't be detected until clients
- tried to connect, so an erroneous file could render the system
- unusable. With the new behavior, if an error is detected during
- reload then the bad file is rejected and the postmaster continues
- to use its old copy.
-
-
-
-
- Show all parsing errors in pg_hba.conf instead of
- aborting after the first one (Selena Deckelmann)
-
-
-
-
- Remove the ident sameuser option, instead making that
- behavior the default if no usermap is specified (Magnus)
-
-
-
-
- Change all authentication options to use name=value
- syntax (Magnus)
-
-
-
-
- Allow a usermap parameter for all external authentication methods
- (Magnus)
-
-
- Previously a usermap was only supported for ident
- authentication.
-
-
-
-
- Add clientcert option to control requesting of a
- client certificate (Magnus)
-
-
- Previously this was controlled by the presence of a root
- certificate file in the server's data directory.
-
-
-
-
- Add cert authentication method to allow
-
user authentication via SSL certificates - (Magnus)
-
-
- Previously
SSL certificates could only verify that - the client had access to a certificate, not authenticate a
- user.
-
-
-
-
- Allow krb5, gssapi and sspi
- realm and krb5 host settings to be specified in
- pg_hba.conf (Magnus)
-
-
- These override the settings in postgresql.conf.
-
-
-
-
- Add include_realm parameter for krb5,
- gssapi, and sspi methods (Magnus)
-
-
- This allows identical usernames from different realms to be
- authenticated as different database users using usermaps.
-
-
-
-
- Support ident authentication over Unix-domain sockets
- on
Solaris (Garick Hamlin) -
-
-
-
-
-
-
-
-
Continuous Archiving
-
-
-
- Provide an option to pg_start_backup() to force its
- implied checkpoint to finish as quickly as possible (Tom)
-
-
- The default behavior avoids excess I/O consumption, but that is
- pointless if no concurrent query activity is going on.
-
-
-
-
- Make
pg_stop_backup() wait for modified WAL - files to be archived (Simon)
-
-
- This guarantees that the backup is valid at the time
- pg_stop_backup() completes.
-
-
-
-
- Delay smart shutdown while a continuous archiving base backup
- is in progress (Laurenz Albe)
-
-
-
-
- Cancel a continuous archiving base backup if fast shutdown
- is requested (Laurenz Albe)
-
-
-
-
- Allow recovery.conf boolean variables to take the
- same range of string values as postgresql.conf
- boolean variables
- (Bruce)
-
-
-
-
-
-
-
-
-
Monitoring
-
-
-
- Add pg_conf_load_time() to report when
- the
PostgreSQL configuration files were last loaded - (George Gensure)
-
-
-
-
- Add pg_terminate_backend() to safely terminate a
- backend (the SIGTERM signal works also) (Tom, Bruce)
-
-
- While it's always been possible to SIGTERM a single
- backend, this was previously considered unsupported; and testing
- of the case found some bugs that are now fixed.
-
-
-
-
- Add ability to track user-defined functions' call counts and
- runtimes (Martin Pihlak)
-
-
- Function statistics appear in a new system view,
- pg_stat_user_functions. Tracking is controlled
- by the new parameter track_functions.
-
-
-
-
- Allow specification of the maximum query string size in
- pg_stat_activity via new
- track_activity_query_size parameter (Thomas Lee)
-
-
-
-
- Increase the maximum line length sent to
syslog, in - hopes of improving performance (Tom)
-
-
-
-
- Add read-only configuration variables segment_size,
- wal_block_size, and wal_segment_size
- (Bernd Helmle)
-
-
-
-
- When reporting a deadlock, report the text of all queries involved
- in the deadlock to the server log (Itagaki Takahiro)
-
-
-
-
- Add pg_stat_get_activity(pid) function to return
- information about a specific process id (Magnus)
-
-
-
-
- Allow the location of the server's statistics file to be specified
- via stats_temp_directory (Magnus)
-
-
- This allows the statistics file to be placed in a
-
RAM-resident directory to reduce I/O requirements. - On startup/shutdown, the file is copied to its traditional location
- ($PGDATA/global/) so it is preserved across restarts.
-
-
-
-
-
-
-
-
-
-
-
Queries
-
-
-
- Add support for WINDOW functions (Hitoshi Harada)
-
-
-
-
- Add support for WITH clauses (CTEs), including WITH
- RECURSIVE (Yoshiyuki Asaba, Tatsuo Ishii, Tom)
-
-
-
-
- Add TABLE command (Peter)
-
-
- TABLE tablename is a SQL standard short-hand for
- SELECT * FROM tablename.
-
-
-
-
- Allow AS to be optional when specifying a
- SELECT (or RETURNING) column output
- label (Hiroshi Saito)
-
-
- This works so long as the column label is not any
-
PostgreSQL keyword; otherwise AS is still - needed.
-
-
-
-
- Support set-returning functions in SELECT result lists
- even for functions that return their result via a tuplestore (Tom)
-
-
- In particular, this means that functions written in PL/PgSQL
- and other PL languages can now be called this way.
-
-
-
-
- Support set-returning functions in the output of aggregation
- and grouping queries (Tom)
-
-
-
-
- Allow SELECT FOR UPDATE/SHARE to work
- on inheritance trees (Tom)
-
-
-
-
- Add infrastructure for
SQL/MED (Martin Pihlak, - Peter)
-
-
- There are no remote or external
SQL/MED capabilities - yet, but this change provides a standardized and future-proof
- system for managing connection information for modules like
- dblink and plproxy.
-
-
-
-
- Invalidate cached plans when referenced schemas, functions, operators,
- or operator classes are modified (Martin Pihlak, Tom)
-
-
- This improves the system's ability to respond to on-the-fly
- DDL changes.
-
-
-
- Allow comparison of composite types and allow arrays of
- anonymous composite types (Tom)
-
-
- This allows constructs such as
- row(1, 1.1) = any (array[row(7, 7.7), row(1, 1.0)]).
- This is particularly useful in recursive queries.
-
-
-
-
- Add support for Unicode string literal and identifier specifications
- using code points, e.g. U&'d\0061t\+000061'
- (Peter)
-
-
-
-
- Improve the parser's ability to report error locations (Tom)
-
-
- An error location is now reported for many semantic errors,
- such as mismatched datatypes, that previously could not be localized.
-
-
-
-
-
-
-
<command>TRUNCATE</>
-
-
-
- Support statement-level ON TRUNCATE triggers (Simon)
-
-
-
-
- Add RESTART/CONTINUE IDENTITY options
- for TRUNCATE TABLE
- (Zoltan Boszormenyi)
-
-
- The start value of a sequence can be changed by ALTER
- SEQUENCE START WITH.
-
-
-
-
- Allow TRUNCATE tab1, tab1 to succeed (Bruce)
-
-
-
-
- Add a separate TRUNCATE permission (Robert Haas)
-
-
-
-
-
-
-
-
-
<command>EXPLAIN</>
-
-
-
- Make EXPLAIN VERBOSE show the output columns of each
- plan node (Tom)
-
-
- Previously EXPLAIN VERBOSE output an internal
- representation of the query plan. (That behavior is now
- available via debug_print_plan.)
-
-
-
-
- Make EXPLAIN identify subplans and initplans with
- individual labels (Tom)
-
-
-
-
- Make EXPLAIN honor debug_print_plan (Tom)
-
-
-
-
- Allow EXPLAIN on CREATE TABLE AS (Peter)
-
-
-
-
-
-
-
-
-
<literal>LIMIT</>/<literal>OFFSET</>
-
-
-
- Allow sub-selects in LIMIT and OFFSET (Tom)
-
-
-
-
- Add
SQL-standard syntax for - LIMIT/OFFSET capabilities (Peter)
-
-
- To wit,
- OFFSET num {ROW|ROWS} FETCH {FIRST|NEXT} [num] {ROW|ROWS}
- ONLY.
-
-
-
-
-
-
-
-
-
-
-
Object Manipulation
-
-
-
- Add support for column-level privileges (Stephen Frost, KaiGai
- Kohei)
-
-
-
-
- Refactor multi-object DROP operations to reduce the
- need for CASCADE (Alex Hunsaker)
-
-
- For example, if table B has a dependency on table
- A, the command DROP TABLE A, B no longer
- requires the CASCADE option.
-
-
-
-
- Fix various problems with concurrent DROP commands
- by ensuring that locks are taken before we begin to drop dependencies
- of an object (Tom)
-
-
-
-
- Improve reporting of dependencies during DROP
- commands (Tom)
-
-
-
-
- Add WITH [NO] DATA clause to CREATE TABLE
- AS, per the
SQL standard (Peter, Tom) -
-
-
-
- Add support for user-defined I/O conversion casts (Heikki)
-
-
-
-
- Allow CREATE AGGREGATE to use an internal
- transition datatype (Tom)
-
-
-
-
- Add LIKE clause to CREATE TYPE (Tom)
-
-
- This simplifies creation of data types that use the same internal
- representation as an existing type.
-
-
-
-
- Allow specification of the type category and preferred
- status for user-defined base types (Tom)
-
-
- This allows more control over the coercion behavior of user-defined
- types.
-
-
-
-
- Allow CREATE OR REPLACE VIEW to add columns to the
- end of a view (Robert Haas)
-
-
-
-
-
-
-
<command>ALTER</>
-
-
-
- Add ALTER TYPE RENAME (Petr Jelinek)
-
-
-
-
- Add ALTER SEQUENCE ... RESTART (with no parameter) to
- reset a sequence to its initial value (Zoltan Boszormenyi)
-
-
-
-
- Modify the ALTER TABLE syntax to allow all reasonable
- combinations for tables, indexes, sequences, and views (Tom)
-
-
- This change allows the following new syntaxes:
-
-
-
- ALTER SEQUENCE OWNER TO
-
-
-
- ALTER VIEW ALTER COLUMN SET/DROP DEFAULT
-
-
-
- ALTER VIEW OWNER TO
-
-
-
- ALTER VIEW SET SCHEMA
-
-
-
-
- There is no actual new functionality here, but formerly
- you had to say ALTER TABLE to do these things,
- which was confusing.
-
-
-
-
- Add support for the syntax ALTER TABLE ... ALTER COLUMN
- ... SET DATA TYPE (Peter)
-
-
- This is
SQL-standard syntax for functionality that - was already supported.
-
-
-
-
- Make ALTER TABLE SET WITHOUT OIDS rewrite the table
- to physically remove OID values (Tom)
-
-
- Also, add ALTER TABLE SET WITH OIDS to rewrite the
- table to add OIDs.
-
-
-
-
-
-
-
-
-
Database Manipulation
-
-
-
- Improve reporting of
- CREATE/DROP/RENAME DATABASE
- failure when uncommitted prepared transactions are the cause
- (Tom)
-
-
-
-
- Make LC_COLLATE and LC_CTYPE into
- per-database settings (Radek Strnad, Heikki)
-
-
- This makes collation similar to encoding, which was always
- configurable per database.
-
-
-
-
- Improve checks that the database encoding, collation
- (LC_COLLATE), and character classes
- (LC_CTYPE) match (Heikki)
-
-
-
-
- Add ALTER DATABASE SET TABLESPACE to move a database
- to a new tablespace (Guillaume Lelarge, Bernd Helmle)
-
-
-
-
-
-
-
-
-
-
-
Utility Operations
-
-
-
-
- Add a VERBOSE option to the CLUSTER command and
-
-
-
-
- Decrease memory requirements for recording pending trigger
- events (Tom)
-
-
-
-
-
-
-
Indexes
-
-
-
- Dramatically improve the speed of building and accessing hash
- indexes (Tom Raney, Shreya Bhargava)
-
-
- This allows hash indexes to be sometimes faster than btree
- indexes. However, hash indexes are still not crash-safe.
-
-
-
-
- Make hash indexes store only the hash code, not the full value of
- the indexed column (Xiao Meng)
-
-
- This greatly reduces the size of hash indexes for long indexed
- values, improving performance.
-
-
-
-
- Implement fast update option for GIN indexes (Teodor, Oleg)
-
-
- This option greatly improves update speed at a small penalty in search
- speed.
-
-
-
-
- xxx_pattern_ops indexes can now be used for simple
- equality comparisons, not only for LIKE (Tom)
-
-
-
-
-
-
-
-
-
Full Text Indexes
-
-
-
- Remove the requirement to use @@@ when doing
-
GIN weighted lookups on full text indexes (Tom, Teodor) -
-
- The normal @@ text search operator can be used
- instead.
-
-
-
-
- Add an optimizer selectivity function for @@ text
- search operations (Jan Urbanski)
-
-
-
-
- Allow prefix matching in full text searches (Teodor Sigaev,
- Oleg Bartunov)
-
-
-
-
- Support multi-column
GIN indexes (Teodor Sigaev) -
-
-
-
- Improve support for Nepali language and Devanagari alphabet (Teodor)
-
-
-
-
-
-
-
-
-
<command>VACUUM</>
-
-
-
- Track free space in separate per-relation fork files (Heikki)
-
-
- Free space discovered by VACUUM is now recorded in
- *_fsm files, rather than in a fixed-sized shared memory
- area. The max_fsm_pages and max_fsm_relations
- settings have been removed, greatly simplifying administration of
- free space management.
-
-
-
-
- Add a visibility map to track pages that do not require
- vacuuming (Heikki)
-
-
- This allows VACUUM to avoid scanning all of
- a table when only a portion of the table needs vacuuming.
- The visibility map is stored in per-relation fork files.
-
-
-
-
- Add vacuum_freeze_table_age parameter to control
- when VACUUM should ignore the visibility map and
- do a full table scan to freeze tuples (Heikki)
-
-
-
-
- Track transaction snapshots more carefully (Alvaro)
-
-
- This improves VACUUM's ability to reclaim space
- in the presence of long-running transactions.
-
-
-
-
- Add ability to specify per-relation autovacuum and
TOAST - parameters in CREATE TABLE (Alvaro, Euler Taveira de
- Oliveira)
-
-
- Autovacuum options used to be stored in a system table.
-
-
-
-
- Add
--freeze option to vacuumdb - (Bruce)
-
-
-
-
-
-
-
-
-
-
-
Data Types
-
-
-
- Add a CaseSensitive option for text search synonym
- dictionaries (Simon)
-
-
-
-
- Improve the precision of NUMERIC division (Tom)
-
-
-
-
- Add basic arithmetic operators for int2 with int8
- (Tom)
-
-
- This eliminates the need for explicit casting in some situations.
-
-
-
-
- Allow UUID input to accept an optional hyphen after
- every fourth digit (Robert Haas)
-
-
-
-
- Allow on/off as input for the boolean data type
- (Itagaki Takahiro)
-
-
-
-
- Allow spaces around NaN in the input string for
- type numeric (Sam Mason)
-
-
-
-
-
-
-
Temporal Data Types
-
-
-
- Reject year 0 BC and years 000 and
- 0000 (Tom)
-
-
- Previously these were interpreted as 1 BC.
- (Note: years 0 and 00 are still assumed to be
- the year 2000.)
-
-
-
-
- Include SGT (Singapore time) in the default list of
- known time zone abbreviations (Tom)
-
-
-
-
- Support infinity and -infinity as
- values of type date (Tom)
-
-
-
-
- Make parsing of interval literals more standard-compliant (Tom)
-
-
- For example, INTERVAL '1' YEAR now does what it's
- supposed to.
-
-
-
-
- Allow interval fractional-seconds precision to be specified
- after the
second keyword, for SQL standard - compliance (Tom)
-
-
- Formerly the precision had to be specified after the keyword
- interval. (For backwards compatibility, this syntax is still
- supported, though deprecated.) Data type definitions will now be
- output using the standard format.
-
-
-
-
- Support the
IS0 8601 interval syntax (Ron - Mayer, Kevin Grittner)
-
-
- For example, INTERVAL 'P1Y2M3DT4H5M6.7S' is now
- supported.
-
-
-
-
- Add IntervalStyle parameter
- which controls how interval values are output (Ron Mayer)
-
-
- Valid values are: postgres, postgres_verbose,
- sql_standard, iso_8601. This setting also
- controls the handling of negative interval input when only
- some fields have positive/negative designations.
-
-
-
-
- Improve consistency of handling of fractional seconds in
- timestamp and interval output (Ron Mayer)
-
-
-
-
-
-
-
-
-
Arrays
-
-
-
- Improve the handling of casts applied to ARRAY[]
- constructs, such as ARRAY[...]::integer[]
- (Brendan Jurd)
-
-
- Formerly
PostgreSQL attempted to determine a data type - for the ARRAY[] construct without reference to the ensuing
- cast. This could fail unnecessarily in many cases, in particular when
- the ARRAY[] construct was empty or contained only
- ambiguous entries such as NULL. Now the cast is consulted
- to determine the type that the array elements must be.
-
-
-
-
- Make
SQL-syntax ARRAY dimensions optional - to match the
SQL standard (Peter) -
-
-
-
- Add array_ndims() to return the number
- of dimensions of an array (Robert Haas)
-
-
-
-
- Add array_length() to return the length
- of an array for a specified dimension (Jim Nasby, Robert
- Haas, Peter Eisentraut)
-
-
-
-
- Add aggregate function array_agg(), which
- returns all aggregated values as a single array (Robert Haas,
- Jeff Davis, Peter)
-
-
-
-
- Add unnest(), which converts an array to
- individual row values (Tom)
-
-
- This is the opposite of array_agg().
-
-
-
-
- Add array_fill() to create arrays initialized with
- a value (Pavel Stehule)
-
-
-
-
- Add generate_subscripts() to simplify generating
- the range of an array's subscripts (Pavel Stehule)
-
-
-
-
-
-
-
-
-
Wide-Value Storage (<acronym>TOAST</>)
-
-
-
- Consider
TOAST compression on values as short as - 32 bytes (previously 256 bytes) (Greg Stark)
-
-
-
-
- Require 25% minimum space savings before using
TOAST - compression (previously 20% for small values and any-savings-at-all
- for large values) (Greg)
-
-
-
-
- Improve
TOAST heuristics for rows that have a mix of large - and small toastable fields, so that we prefer to push large values out
- of line and don't compress small values unnecessarily (Greg, Tom)
-
-
-
-
-
-
-
-
-
-
-
Functions
-
-
-
- Document that setseed() allows values from
- -1 to 1 (not just 0 to
- 1), and enforce the valid range (Kris Jurka)
-
-
-
-
- Add server-side function lo_import(filename, oid)
- (Tatsuo)
-
-
-
-
- Add quote_nullable(), which behaves like
- quote_literal() but returns the string NULL for
- a null argument (Brendan Jurd)
-
-
-
-
- Improve full text search headline() function to
- allow extracting several fragments of text (Sushant Sinha)
-
-
-
-
- Add suppress_redundant_updates_trigger() trigger
- function to avoid overhead for non-data-changing updates (Andrew)
-
-
-
-
- Add div(numeric, numeric) to perform numeric
- division without rounding (Tom)
-
-
-
-
- Add timestamp and timestamptz versions of
- generate_series() (Hitoshi Harada)
-
-
-
-
-
-
-
Object Information Functions
-
-
-
- Implement current_query() for use by functions
- that need to know the currently running query (Tomas Doran)
-
-
-
-
- Add pg_get_keywords() to return a list of the
- parser keywords (Dave Page)
-
-
-
-
- Add pg_get_functiondef() to see a function's
- definition (Abhijit Menon-Sen)
-
-
-
-
- Modify pg_relation_size() to use regclass
- (Heikki)
-
-
- pg_relation_size(data_type_name) no longer works.
-
-
-
-
- Add boot_val and reset_val columns to
- pg_settings output (Greg Smith)
-
-
-
-
- Add source file name and line number columns to
- pg_settings output for variables set in a configuration
- file (Magnus, Alvaro)
-
-
- For security reasons, these columns are only visible to superusers.
-
-
-
-
- Add support for CURRENT_CATALOG,
- CURRENT_SCHEMA, SET CATALOG, SET
- SCHEMA (Peter)
-
-
- These provide
SQL-standard syntax for existing features. -
-
-
-
- Add pg_typeof() which returns the data type
- of any value (Brendan Jurd)
-
-
-
-
- Make version() return information about whether
- the server is a 32- or 64-bit binary (Bruce)
-
-
-
-
- Fix the behavior of information schema columns
- is_insertable_into and is_updatable to
- be consistent (Peter)
-
-
-
-
- Convert remaining builtin set-returning functions to use
- OUT parameters (Jaime Casanova)
-
-
- This makes it possible to call these functions without specifying
- a column list: pg_show_all_settings(),
- pg_lock_status(), pg_prepared_xact(),
- pg_prepared_statement(), pg_cursor()
-
-
-
-
- Make pg_*_is_visible() and
- has_*_privilege() functions return NULL
- for invalid OIDs, rather than reporting an error (Tom)
-
-
-
-
- Extend has_*_privilege() functions to allow inquiring
- about the OR of multiple privileges in one call (Stephen
- Frost, Tom)
-
-
-
-
- Add has_column_privilege() and
- has_any_column_privilege() functions (Stephen
- Frost, Tom)
-
-
-
-
-
-
-
-
-
Function Creation
-
-
-
- Support variadic functions (functions with a variable number
- of arguments) (Pavel Stehule)
-
-
- Only trailing arguments can be optional, and they all must be
- of the same data type.
-
-
-
-
- Support default values for function arguments (Pavel Stehule)
-
-
-
-
- Add CREATE FUNCTION ... RETURNS TABLE clause (Pavel
- Stehule)
-
-
-
-
- Allow
SQL-language functions to return the output - of an INSERT/UPDATE/DELETE
- RETURNING clause (Tom)
-
-
-
-
-
-
-
-
-
PL/PgSQL Server-Side Language
-
-
-
- Support EXECUTE USING for easier insertion of data
- values into a dynamic query string (Pavel Stehule)
-
-
-
-
- Allow looping over the results of a cursor using a FOR
- loop (Pavel Stehule)
-
-
-
-
- Support RETURN QUERY EXECUTE (Pavel
- Stehule)
-
-
-
-
- Improve the RAISE command (Pavel Stehule)
-
-
-
- Support DETAIL and HINT fields
-
-
-
- Support specification of the SQLSTATE error code
-
-
-
- Support an exception name parameter
-
-
-
- Allow RAISE without parameters in an exception
- block to re-throw the current error
-
-
-
-
-
-
-
- Allow specification of SQLSTATE codes
- in EXCEPTION lists (Pavel Stehule)
-
-
- This is useful for handling custom SQLSTATE codes.
-
-
-
-
- Support the CASE statement (Pavel Stehule)
-
-
-
-
- Make RETURN QUERY set the special FOUND and
- GET DIAGNOSTICS ROW_COUNT variables
- (Pavel Stehule)
-
-
-
-
- Make FETCH and MOVE set the
- GET DIAGNOSTICS ROW_COUNT variable
- (Andrew Gierth)
-
-
-
-
- Avoid memory leakage when the same function is called at varying
- exception-block nesting depths (Tom)
-
-
-
-
-
-
-
-
-
-
-
Client Applications
-
-
-
-
- Fix pg_ctl restart to preserve command-line arguments
- (Bruce)
-
-
-
-
- Add -w/--no-password option that
- prevents password prompting in all utilities that have a
- -W/--password option (Peter)
-
-
-
-
- Remove
-q (quiet) option of createdb, -
-
- These options have had no effect since
PostgreSQL - 8.3.
-
-
-
-
-
-
-
<application>psql</>
-
-
-
- Remove verbose startup banner; now just suggest help
- (Joshua Drake)
-
-
-
-
- Make help show common backslash commands (Greg
- Sabino Mullane)
-
-
-
-
- Add \pset format wrapped mode to wrap output to the
- screen width, or file/pipe output too if \pset columns
- is set (Bryce Nesbitt)
-
-
-
-
- Allow all supported spellings of boolean values in \pset,
- rather than just on and off (Bruce)
-
-
- Formerly, any string other than off was silently taken
- to mean
true. psql will now complain - about unrecognized spellings (but still take them as true).
-
-
-
-
- Use the pager for wide output (Bruce)
-
-
-
-
- Require a space between a one-letter backslash command and its first
- argument (Bernd Helmle)
-
-
- This removes a historical source of ambiguity.
-
-
-
-
- Improve tab completion support for schema-qualified and
- quoted identifiers (Greg Sabino Mullane)
-
-
-
-
- Add optional on/off argument for
- \timing (David Fetter)
-
-
-
-
- Display access control rights on multiple lines (Brendan
- Jurd, Andreas Scherbaum)
-
-
-
-
- Make \l show database access privileges (Andrew Gilligan)
-
-
-
-
- Make \l+ show database sizes, if permissions
- allow (Andrew Gilligan)
-
-
-
-
- Add the \ef command to edit function definitions
- (Abhijit Menon-Sen)
-
-
-
-
-
-
-
-
-
<application>psql</> \d* commands
-
-
-
-
- Make \d* commands that do not have a pattern argument
- show system objects only if the S modifier is specified
- (Greg Sabino Mullane, Bruce)
-
-
- The former behavior was inconsistent across different variants
- of \d, and in most cases it provided no easy way to see
- just user objects.
-
-
-
-
- Improve \d* commands to work with older
-
PostgreSQL server versions (back to 7.4), - not only the current server version
- (Guillaume Lelarge)
-
-
-
-
- Make \d show foreign-key constraints that reference
- the selected table (Kenneth D'Souza)
-
-
-
-
- Make \d on a sequence show its column values
- (Euler Taveira de Oliveira)
-
-
-
-
- Add column storage type and other relation options to the
- \d+ display (Gregory Stark, Euler Taveira de
- Oliveira)
-
-
-
-
- Show relation size in \dt+ output (Dickson S.
- Guedes)
-
-
-
-
- Show the possible values of enum types in \dT+
- (David Fetter)
-
-
-
-
- Allow \dC to accept a wildcard pattern, which matches
- either datatype involved in the cast (Tom)
-
-
-
-
- Make \df not hide functions that take or return
- type cstring (Tom)
-
-
- Previously, such functions were hidden because most of them are
- datatype I/O functions, which were deemed uninteresting. The new
- policy about hiding system functions by default makes this wart
- unnecessary.
-
-
-
-
-
-
-
-
-
<application>pg_dump</>
-
-
-
- Add a --no-tablespaces option to
-
pg_dump/pg_dumpall/pg_restore - so that dumps can be restored to clusters that have non-matching
- tablespace layouts (Gavin Roy)
-
-
-
-
- Remove -d and -D options from
-
pg_dump and pg_dumpall (Tom) -
-
- These options were too frequently confused with the option to
- select a database name in other
PostgreSQL - client applications. The functionality is still available,
- but you must now spell out the long option name
- --inserts or --column-inserts.
-
-
-
-
- Remove -i/ --ignore-version option from
-
pg_dump and pg_dumpall (Tom) -
-
- Use of this option does not throw an error, but it has no
- effect. This option was removed because the version checks
- are necessary for safety.
-
-
-
-
- Disable statement_timeout during dump and restore
- (Joshua Drake)
-
-
-
-
- Add
pg_dump/pg_dumpall option - --lock-wait-timeout (David Gould)
-
-
- This allows dumps to fail if unable to acquire a shared lock
- within the specified amount of time.
-
-
-
-
- Reorder
pg_dump --data-only output - to dump tables referenced by foreign keys before
- the referencing tables (Tom)
-
-
- This allows data loads when foreign keys are already present.
- If circular references make a safe ordering impossible, a
- NOTICE is issued.
-
-
-
-
- Allow
pg_dump, pg_dumpall, and -
pg_restore to use a specified role (Benedek - László)
-
-
-
-
- Allow
pg_restore to use multiple concurrent - connections to do the restore (Andrew)
-
-
- The number of concurrent connections is controlled by the option
- --jobs. This is supported only for custom-format archives.
-
-
-
-
-
-
-
-
-
-
-
Programming Tools
-
-
-
<application>libpq</>
-
-
-
- Allow the OID to be specified when importing a large
- object, via new function lo_import_with_oid() (Tatsuo)
-
-
-
-
- Add events support (Andrew Chernow, Merlin Moncure)
-
-
- This adds the ability to register callbacks to manage private
- data associated with PGconn and PGresult
- objects.
-
-
-
-
- Improve error handling to allow the return of multiple
- error messages as multi-line error reports (Magnus)
-
-
-
-
- Make PQexecParams() and related functions return
- PGRES_EMPTY_QUERY for an empty query (Tom)
-
-
- They previously returned PGRES_COMMAND_OK.
-
-
-
-
- Document how to avoid the overhead of WSACleanup()
- on Windows (Andrew Chernow)
-
-
-
-
-
-
-
-
-
<application>libpq</> <acronym>SSL</> (Secure Sockets Layer)</div>
<div class="diff rem">- support
-
-
-
- Fix certificate validation for
SSL connections - (Magnus)
-
-
-
libpq now supports verifying both the certificate - and the name of the server when making
SSL - connections. If a root certificate is not available to use for
- verification,
SSL connections will fail. The - sslmode parameter is used to enable the certificate
- verification.
-
-
- The default is still not to do any verification.
-
-
-
-
- Allow the file locations for client certificates to be specified
- (Mark Woodward, Alvaro, Magnus)
-
-
-
-
- Add a PQinitOpenSSL function to allow greater control
- over OpenSSL/libcrypto initialization (Andrew Chernow)
-
-
-
-
- Make
libpq unregister its OpenSSL - callbacks when no database connections remain open
- (Bruce, Magnus, Russell Smith)
-
-
- This is required for applications that unload the libpq library,
- otherwise invalid
OpenSSL callbacks will remain. -
-
-
-
-
-
-
-
-
<application>ecpg</>
-
-
-
- Add localization support for messages (Euler Taveira de
- Oliveira)
-
-
-
-
- ecpg parser is now automatically generated from the server
- parser (Michael)
-
-
- Previously the ecpg parser was hand-maintained.
-
-
-
-
-
-
-
-
-
Server Programming Interface (<acronym>SPI</>)
-
-
-
- Add support for single-use plans with out-of-line
- parameters (Tom)
-
-
-
-
- Add new SPI_OK_REWRITTEN return code for
- SPI_execute() (Heikki)
-
-
- This is used when a command is rewritten to another type of
- command.
-
-
-
-
- Remove unnecessary inclusions from executor/spi.h (Tom)
-
-
- SPI-using modules might need to add some #include
- lines if they were depending on spi.h to include
- things for them.
-
-
-
-
-
-
-
-
-
-
-
Build Options
-
-
-
- Update build system to use
Autoconf 2.61 (Peter) -
-
-
-
- Require
GNU bison for source code builds (Peter) -
-
- This has effectively been required for several years, but now there
- is no infrastructure claiming to support other parser tools.
-
-
-
-
- Add
pg_config --htmldir option - (Peter)
-
-
-
-
- Pass float4 by value inside the server (Zoltan
- Boszormenyi)
-
-
- --disable-float4-byval to use the old behavior.
- External C functions that use old-style (version 0) call convention
- and pass or return float4 values will be broken by this
- change, so you may need the
configure option if you - have such functions and don't want to update them.
-
-
-
-
- Pass float8, int8, and related datatypes
- by value inside the server on 64-bit platforms (Zoltan Boszormenyi)
-
-
- --disable-float8-byval to use the old behavior.
- As above, this change might break old-style external C functions.
-
-
-
-
- Add configure options --with-segsize,
- --with-blocksize, --with-wal-blocksize,
- --with-wal-segsize (Zdenek Kotala, Tom)
-
-
- This simplifies build-time control over several constants that
- previously could only be changed by editing
- pg_config_manual.h.
-
-
-
-
- Allow threaded builds on
Solaris 2.5 (Bruce) -
-
-
-
- Use the system's
getopt_long() on Solaris - (Zdenek Kotala, Tom)
-
-
- This makes option processing more consistent with what Solaris users
- expect.
-
-
-
-
- Add support for the
Sun Studio compiler on -
Linux (Julius Stroffek) -
-
-
-
- Append the major version number to the backend
gettext - domain, and the soname major version number to
- libraries'
gettext domain (Peter) -
-
- This simplifies parallel installations of multiple versions.
-
-
-
-
- Add support for code coverage testing with
gcov - (Michelle Caisse)
-
-
-
-
- Allow out-of-tree builds on
Mingw and -
-
-
-
- Fix the use of
Mingw as a cross-compiling source - platform (Peter)
-
-
-
-
-
-
-
-
-
Source Code
-
-
-
- Support 64-bit time zone data files (Heikki)
-
-
- This adds support for daylight saving time (
DST) - calculations beyond the year 2038.
-
-
-
-
- Deprecate use of platform's time_t data type (Tom)
-
-
- Some platforms have migrated to 64-bit time_t, some have
- not, and Windows can't make up its mind what it's doing. Define
- pg_time_t to have the same meaning as time_t,
- but always be 64 bits (unless the platform has no 64-bit integer type),
- and use that type in all module APIs and on-disk data formats.
-
-
-
-
- Fix bug in handling of the time zone database when cross-compiling
- (Richard Evans)
-
-
-
-
- Link backend object files in one step, rather than in stages
- (Peter)
-
-
-
-
- Improve
gettext support to allow better translation - of plurals (Peter)
-
-
-
-
- Add message translation support to the PL languages (Alvaro, Peter)
-
-
-
-
- Add more
DTrace probes (Robert Lor) -
-
-
-
- Enable
DTrace support on Mac OS X - Leopard and other non-Solaris platforms (Robert Lor)
-
-
-
-
- Simplify and standardize conversions between C strings and
- text datums, by providing common functions for the purpose
- (Brendan Jurd, Tom)
-
-
-
-
- Clean up the include/catalog/ header files so that
- frontend programs can include them without including
- postgres.h
- (Zdenek Kotala)
-
-
-
-
- Make name char-aligned, and suppress zero-padding of
- name entries in indexes (Tom)
-
-
-
-
- Add a hook to let plug-ins monitor the executor (Itagaki
- Takahiro)
-
-
-
-
- Add a hook to allow the planner's statistics lookup behavior to
- be overridden (Simon Riggs)
-
-
-
-
- Add shmem_startup_hook() for custom shared memory
- requirements (Tom)
-
-
-
-
- Replace the index access method amgetmulti entry point
- with amgetbitmap, and extend the API for
- amgettuple to support run-time determination of
- operator lossiness (Heikki, Tom, Teodor)
-
-
- The API for GIN and GiST opclass consistent functions
- has been extended as well.
-
-
-
-
- Add support for partial-match searches in
GIN indexes - (Teodor Sigaev, Oleg Bartunov)
-
-
-
-
- Replace pg_class column reltriggers
- with boolean relhastriggers (Simon)
-
-
- Also remove unused pg_class columns
- relukeys, relfkeys, and
- relrefs.
-
-
-
-
- Add a relistemp column to pg_class
- to ease identification of temporary tables (Tom)
-
-
-
-
- Move platform
FAQs into the main documentation - (Peter)
-
-
-
-
- Prevent parser input files from being built with any conflicts
- (Peter)
-
-
-
-
- Add support for the KOI8U (Ukrainian) encoding
- (Peter)
-
-
-
-
- Add Japanese message translations (Japan PostgreSQL Users Group)
-
-
- This used to be maintained as a separate project.
-
-
-
-
- Fix problem when setting LC_MESSAGES on
-
MSVC-built systems (Hiroshi Inoue, Hiroshi - Saito, Magnus)
-
-
-
-
-
-
-
-
-
Contrib
-
-
-
-
- Add contrib/auto_explain to automatically run
- EXPLAIN on queries exceeding a specified duration
- (Itagaki Takahiro, Tom)
-
-
-
-
- Add contrib/btree_gin to allow GIN indexes to
- handle more datatypes (Oleg, Teodor)
-
-
-
-
- Add contrib/citext to provide a case-insensitive,
- multibyte-aware text data type (David Wheeler)
-
-
-
-
- Add contrib/pg_stat_statements for server-wide
- tracking of statement execution statistics (Itagaki Takahiro)
-
-
-
-
- Add duration and query mode options to contrib/pgbench
- (Itagaki Takahiro)
-
-
-
-
- Fix contrib/pgstattuple to handle tables and
- indexes with over 2 billion pages (Tatsuhito Kasahara)
-
-
-
-
- In contrib/fuzzystrmatch, add a version of the
- Levenshtein string-distance function that allows the user to
- specify the costs of insertion, deletion, and substitution
- (Volkan Yazici)
-
-
-
-
- Make contrib/ltree support multibyte encodings
- (laser)
-
-
-
-
- Improve contrib/dblink's reporting of errors from
- the remote server (Joe Conway)
-
-
-
-
- Make sure contrib/dblink uses a password supplied
- by the user, and not accidentally taken from the server's
- .pgpass file (Joe Conway)
-
-
- This is a minor security enhancement.
-
-
-
-
- Add fsm_page_contents()
- to contrib/pageinspect (Heikki)
-
-
-
-
- Modify get_raw_page() to support free space map
- (*_fsm) files. Also update
- contrib/pg_freespacemap.
-
-
-
-
- Add support for multibyte encodings to contrib/pg_trgm
- (Teodor)
-
-
-
-
- Rewrite contrib/intagg to use new
- functions array_agg() and unnest()
- (Tom)
-
-
-
-
- Remove contrib/intarray's definitions of the
- <@ and @> operators (Tom)
-
-
- This avoids confusion with the equivalent built-in operators.
- If needed, the contrib/intarray implementations
- are still available under their historical names @
- and ~.
-
-
-
-
-
-
-
-
-
-
-
Release 8.3.7
-
-
-
Release date
- 2009-03-16
-
-
- This release contains a variety of fixes from 8.3.6.
- For information about new features in the 8.3 major release, see
- .
-
-
-
-
Migration to Version 8.3.7
-
- A dump/restore is not required for those running 8.3.X.
- However, if you are upgrading from a version earlier than 8.3.5,
- see the release notes for 8.3.5.
-
-
-
-
-
-
Changes
-
-
-
-
- Prevent error recursion crashes when encoding conversion fails (Tom)
-
-
- This change extends fixes made in the last two minor releases for
- related failure scenarios. The previous fixes were narrowly tailored
- for the original problem reports, but we have now recognized that
- any error thrown by an encoding conversion function could
- potentially lead to infinite recursion while trying to report the
- error. The solution therefore is to disable translation and encoding
- conversion and report the plain-ASCII form of any error message,
- if we find we have gotten into a recursive error reporting situation.
- (CVE-2009-0922)
-
-
-
-
- Disallow CREATE CONVERSION with the wrong encodings
- for the specified conversion function (Heikki)
-
-
- This prevents one possible scenario for encoding conversion failure.
- The previous change is a backstop to guard against other kinds of
- failures in the same area.
-
-
-
-
- Fix xpath() to not modify the path expression unless
- necessary, and to make a saner attempt at it when necessary (Andrew)
-
-
- The SQL standard suggests that xpath should work on data
- that is a document fragment, but
libxml doesn't support - that, and indeed it's not clear that this is sensible according to the
- XPath standard. xpath attempted to work around this
- mismatch by modifying both the data and the path expression, but the
- modification was buggy and could cause valid searches to fail. Now,
- xpath checks whether the data is in fact a well-formed
- document, and if so invokes
libxml with no change to the - data or path expression. Otherwise, a different modification method
- that is somewhat less likely to fail is used.
-
-
-
- The new modification method is still not 100% satisfactory, and it
- seems likely that no real solution is possible. This patch should
- therefore be viewed as a band-aid to keep from breaking existing
- applications unnecessarily. It is likely that
-
PostgreSQL 8.4 will simply reject use of - xpath on data that is not a well-formed document.
-
-
-
-
-
- Fix core dump when to_char() is given format codes that
- are inappropriate for the type of the data argument (Tom)
-
-
-
-
- Fix possible failure in text search when C locale is used with
- a multi-byte encoding (Teodor)
-
-
- Crashes were possible on platforms where wchar_t is narrower
- than int; Windows in particular.
-
-
-
-
- Fix extreme inefficiency in text search parser's handling of an
- email-like string containing multiple @ characters (Heikki)
-
-
-
-
- Fix planner problem with sub-SELECT in the output list
- of a larger subquery (Tom)
-
-
- The known symptom of this bug is a failed to locate grouping
- columns error that is dependent on the datatype involved;
- but there could be other issues as well.
-
-
-
-
- Fix decompilation of CASE WHEN with an implicit coercion
- (Tom)
-
-
- This mistake could lead to Assert failures in an Assert-enabled build,
- or an unexpected CASE WHEN clause error message in other
- cases, when trying to examine or dump a view.
-
-
-
-
- Fix possible misassignment of the owner of a TOAST table's rowtype (Tom)
-
-
- If CLUSTER or a rewriting variant of ALTER TABLE
- were executed by someone other than the table owner, the
- pg_type entry for the table's TOAST table would end up
- marked as owned by that someone. This caused no immediate problems,
- since the permissions on the TOAST rowtype aren't examined by any
- ordinary database operation. However, it could lead to unexpected
- failures if one later tried to drop the role that issued the command
- (in 8.1 or 8.2), or owner of data type appears to be invalid
- warnings from
pg_dump after having done so (in 8.3). -
-
-
-
- Change UNLISTEN to exit quickly if the current session has
- never executed any LISTEN command (Tom)
-
-
- Most of the time this is not a particularly useful optimization, but
- since DISCARD ALL invokes UNLISTEN, the previous
- coding caused a substantial performance problem for applications that
- made heavy use of DISCARD ALL.
-
-
-
-
- Fix PL/pgSQL to not treat INTO after INSERT as
- an INTO-variables clause anywhere in the string, not only at the start;
- in particular, don't fail for INSERT INTO within
- CREATE RULE (Tom)
-
-
-
-
- Clean up PL/pgSQL error status variables fully at block exit
- (Ashesh Vashi and Dave Page)
-
-
- This is not a problem for PL/pgSQL itself, but the omission could cause
- the PL/pgSQL Debugger to crash while examining the state of a function.
-
-
-
-
- Retry failed calls to CallNamedPipe() on Windows
- (Steve Marshall, Magnus)
-
-
- It appears that this function can sometimes fail transiently;
- we previously treated any failure as a hard error, which could
- confuse LISTEN/NOTIFY as well as other
- operations.
-
-
-
-
- Add MUST (Mauritius Island Summer Time) to the default list
- of known timezone abbreviations (Xavier Bugaud)
-
-
-
-
-
-
-
-
-
-
Release 8.3.6
-
-
-
Release date
- 2009-02-02
-
-
- This release contains a variety of fixes from 8.3.5.
- For information about new features in the 8.3 major release, see
- .
-
-
-
-
Migration to Version 8.3.6
-
- A dump/restore is not required for those running 8.3.X.
- However, if you are upgrading from a version earlier than 8.3.5,
- see the release notes for 8.3.5.
-
-
-
-
-
-
Changes
-
-
-
-
- Make DISCARD ALL release advisory locks, in addition
- to everything it already did (Tom)
-
-
- This was decided to be the most appropriate behavior. This could
- affect existing applications, however.
-
-
-
-
- Fix whole-index GiST scans to work correctly (Teodor)
-
-
- This error could cause rows to be lost if a table is clustered
- on a GiST index.
-
-
-
-
- Fix crash of xmlconcat(NULL) (Peter)
-
-
-
-
- Fix possible crash in ispell dictionary if high-bit-set
- characters are used as flags (Teodor)
-
-
- This is known to be done by one widely available Norwegian dictionary,
- and the same condition may exist in others.
-
-
-
-
- Fix misordering of
pg_dump output for composite types - (Tom)
-
-
- The most likely problem was for user-defined operator classes to
- be dumped after indexes or views that needed them.
-
-
-
-
- Improve handling of URLs in headline() function (Teodor)
-
-
-
-
- Improve handling of overlength headlines in headline()
- function (Teodor)
-
-
-
-
- Prevent possible Assert failure or misconversion if an encoding
- conversion is created with the wrong conversion function for the
- specified pair of encodings (Tom, Heikki)
-
-
-
-
- Fix possible Assert failure if a statement executed in PL/pgSQL is
- rewritten into another kind of statement, for example if an
- INSERT is rewritten into an UPDATE (Heikki)
-
-
-
-
- Ensure that a snapshot is available to datatype input functions (Tom)
-
-
- This primarily affects domains that are declared with CHECK
- constraints involving user-defined stable or immutable functions. Such
- functions typically fail if no snapshot has been set.
-
-
-
-
- Make it safer for SPI-using functions to be used within datatype I/O;
- in particular, to be used in domain check constraints (Tom)
-
-
-
-
- Avoid unnecessary locking of small tables in VACUUM
- (Heikki)
-
-
-
-
- Fix a problem that sometimes kept ALTER TABLE ENABLE/DISABLE
- RULE from being recognized by active sessions (Tom)
-
-
-
-
- Fix a problem that made UPDATE RETURNING tableoid
- return zero instead of the correct OID (Tom)
-
-
-
-
- Allow functions declared as taking ANYARRAY to work on
- the pg_statistic columns of that type (Tom)
-
-
- This used to work, but was unintentionally broken in 8.3.
-
-
-
-
- Fix planner misestimation of selectivity when transitive equality
- is applied to an outer-join clause (Tom)
-
-
- This could result in bad plans for queries like
- ... from a left join b on a.a1 = b.b1 where a.a1 = 42 ...
-
-
-
-
- Improve optimizer's handling of long IN lists (Tom)
-
-
- This change avoids wasting large amounts of time on such lists
- when constraint exclusion is enabled.
-
-
-
-
- Prevent synchronous scan during GIN index build (Tom)
-
-
- Because GIN is optimized for inserting tuples in increasing TID order,
- choosing to use a synchronous scan could slow the build by a factor of
- three or more.
-
-
-
-
- Ensure that the contents of a holdable cursor don't depend on the
- contents of TOAST tables (Tom)
-
-
- Previously, large field values in a cursor result might be represented
- as TOAST pointers, which would fail if the referenced table got dropped
- before the cursor is read, or if the large value is deleted and then
- vacuumed away. This cannot happen with an ordinary cursor,
- but it could with a cursor that is held past its creating transaction.
-
-
-
-
- Fix memory leak when a set-returning function is terminated without
- reading its whole result (Tom)
-
-
-
-
- Fix encoding conversion problems in XML functions when the database
- encoding isn't UTF-8 (Tom)
-
-
-
-
- Fix contrib/dblink's
- dblink_get_result(text,bool) function (Joe)
-
-
-
-
- Fix possible garbage output from contrib/sslinfo functions
- (Tom)
-
-
-
-
- Fix incorrect behavior of contrib/tsearch2 compatibility
- trigger when it's fired more than once in a command (Teodor)
-
-
-
-
- Fix possible mis-signaling in autovacuum (Heikki)
-
-
-
-
- Support running as a service on Windows 7 beta (Dave and Magnus)
-
-
-
-
- Fix
ecpg's handling of varchar structs (Michael) -
-
-
-
- Fix
configure script to properly report failure when - unable to obtain linkage information for PL/Perl (Andrew)
-
-
-
-
- Make all documentation reference pgsql-bugs and/or
- pgsql-hackers as appropriate, instead of the
- now-decommissioned pgsql-ports and pgsql-patches
- mailing lists (Tom)
-
-
-
-
- Update time zone data files to
tzdata release 2009a (for - Kathmandu and historical DST corrections in Switzerland, Cuba)
-
-
-
-
-
-
-
-
-
-
Release 8.3.5
-
-
-
Release date
- 2008-11-03
-
-
- This release contains a variety of fixes from 8.3.4.
- For information about new features in the 8.3 major release, see
- .
-
-
-
-
Migration to Version 8.3.5
-
- A dump/restore is not required for those running 8.3.X.
- However, if you are upgrading from a version earlier than 8.3.1,
- see the release notes for 8.3.1. Also, if you were running a previous
- 8.3.X release, it is recommended to REINDEX all GiST
- indexes after the upgrade.
-
-
-
-
-
-
Changes
-
-
-
-
- Fix GiST index corruption due to marking the wrong index entry
- dead after a deletion (Teodor)
-
-
- This would result in index searches failing to find rows they
- should have found. Corrupted indexes can be fixed with
- REINDEX.
-
-
-
-
- Fix backend crash when the client encoding cannot represent a localized
- error message (Tom)
-
-
- We have addressed similar issues before, but it would still fail if
- the character has no equivalent message itself couldn't
- be converted. The fix is to disable localization and send the plain
- ASCII error message when we detect such a situation.
-
-
-
-
- Fix possible crash in bytea-to-XML mapping (Michael McMaster)
-
-
-
-
- Fix possible crash when deeply nested functions are invoked from
- a trigger (Tom)
-
-
-
-
- Improve optimization of expression IN
- (expression-list) queries (Tom, per an idea from Robert
- Haas)
-
-
- Cases in which there are query variables on the right-hand side had been
- handled less efficiently in 8.2.x and 8.3.x than in prior versions.
- The fix restores 8.1 behavior for such cases.
-
-
-
-
- Fix mis-expansion of rule queries when a sub-SELECT appears
- in a function call in FROM, a multi-row VALUES
- list, or a RETURNING list (Tom)
-
-
- The usual symptom of this problem is an unrecognized node type
- error.
-
-
-
-
- Fix Assert failure during rescan of an IS NULL
- search of a GiST index (Teodor)
-
-
-
-
- Fix memory leak during rescan of a hashed aggregation plan (Neil)
-
-
-
-
- Ensure an error is reported when a newly-defined PL/pgSQL trigger
- function is invoked as a normal function (Tom)
-
-
-
-
- Force a checkpoint before CREATE DATABASE starts to copy
- files (Heikki)
-
-
- This prevents a possible failure if files had recently been deleted
- in the source database.
-
-
-
-
- Prevent possible collision of relfilenode numbers
- when moving a table to another tablespace with ALTER SET
- TABLESPACE (Heikki)
-
-
- The command tried to re-use the existing filename, instead of
- picking one that is known unused in the destination directory.
-
-
-
-
- Fix incorrect text search headline generation when single query
- item matches first word of text (Sushant Sinha)
-
-
-
-
- Fix improper display of fractional seconds in interval values when
- using a non-ISO datestyle in an --enable-integer-datetimes
- build (Ron Mayer)
-
-
-
-
- Make ILIKE compare characters case-insensitively
- even when they're escaped (Andrew)
-
-
-
-
- Ensure DISCARD is handled properly by statement logging (Tom)
-
-
-
-
- Fix incorrect logging of last-completed-transaction time during
- PITR recovery (Tom)
-
-
-
-
- Ensure SPI_getvalue and SPI_getbinval
- behave correctly when the passed tuple and tuple descriptor have
- different numbers of columns (Tom)
-
-
- This situation is normal when a table has had columns added or removed,
- but these two functions didn't handle it properly.
- The only likely consequence is an incorrect error indication.
-
-
-
-
- Mark SessionReplicationRole as PGDLLIMPORT
- so it can be used by
Slony on Windows (Magnus) -
-
-
-
- Fix small memory leak when using
libpq's - gsslib parameter (Magnus)
-
-
- The space used by the parameter string was not freed at connection
- close.
-
-
-
-
- Ensure
libgssapi is linked into libpq - if needed (Markus Schaaf)
-
-
-
-
- Fix
ecpg's parsing of CREATE ROLE (Michael) -
-
-
-
- Fix recent breakage of pg_ctl restart (Tom)
-
-
-
-
- Ensure pg_control is opened in binary mode
- (Itagaki Takahiro)
-
-
-
pg_controldata and pg_resetxlog - did this incorrectly, and so could fail on Windows.
-
-
-
-
- Update time zone data files to
tzdata release 2008i (for - DST law changes in Argentina, Brazil, Mauritius, Syria)
-
-
-
-
-
-
-
-
-
-
Release 8.3.4
-
-
-
Release date
- 2008-09-22
-
-
- This release contains a variety of fixes from 8.3.3.
- For information about new features in the 8.3 major release, see
- .
-
-
-
-
Migration to Version 8.3.4
-
- A dump/restore is not required for those running 8.3.X.
- However, if you are upgrading from a version earlier than 8.3.1,
- see the release notes for 8.3.1.
-
-
-
-
-
-
Changes
-
-
-
-
- Fix bug in btree WAL recovery code (Heikki)
-
-
- Recovery failed if the WAL ended partway through a page split operation.
-
-
-
-
- Fix potential use of wrong cutoff XID for HOT page pruning (Alvaro)
-
-
- This error created a risk of corruption in system
- catalogs that are consulted by VACUUM: dead tuple versions
- might be removed too soon. The impact of this on actual database
- operations would be minimal, since the system doesn't follow MVCC
- rules while examining catalogs, but it might result in transiently
- wrong output from
pg_dump or other client programs. -
-
-
-
- Fix potential miscalculation of datfrozenxid (Alvaro)
-
-
- This error may explain some recent reports of failure to remove old
- pg_clog data.
-
-
-
-
- Fix incorrect HOT updates after pg_class is reindexed
- (Tom)
-
-
- Corruption of pg_class could occur if REINDEX
- TABLE pg_class was followed in the same session by an ALTER
- TABLE RENAME or ALTER TABLE SET SCHEMA command.
-
-
-
-
- Fix missed combo cid case (Karl Schnaitter)
-
-
- This error made rows incorrectly invisible to a transaction in which they
- had been deleted by multiple subtransactions that all aborted.
-
-
-
-
- Prevent autovacuum from crashing if the table it's currently
- checking is deleted at just the wrong time (Alvaro)
-
-
-
-
- Widen local lock counters from 32 to 64 bits (Tom)
-
-
- This responds to reports that the counters could overflow in
- sufficiently long transactions, leading to unexpected lock is
- already held errors.
-
-
-
-
- Fix possible duplicate output of tuples during a GiST index scan (Teodor)
-
-
-
-
- Regenerate foreign key checking queries from scratch when either
- table is modified (Tom)
-
-
- Previously, 8.3 would attempt to replan the query, but would work from
- previously generated query text. This led to failures if a
- table or column was renamed.
-
-
-
-
- Fix missed permissions checks when a view contains a simple
- UNION ALL construct (Heikki)
-
-
- Permissions for the referenced tables were checked properly, but not
- permissions for the view itself.
-
-
-
-
- Add checks in executor startup to ensure that the tuples produced by an
- INSERT or UPDATE will match the target table's
- current rowtype (Tom)
-
-
- This situation is believed to be impossible in 8.3, but it can happen in
- prior releases, so a check seems prudent.
-
-
-
-
- Fix possible repeated drops during DROP OWNED (Tom)
-
-
- This would typically result in strange errors such as cache
- lookup failed for relation NNN.
-
-
-
-
- Fix several memory leaks in XML operations (Kris Jurka, Tom)
-
-
-
-
- Fix xmlserialize() to raise error properly for
- unacceptable target data type (Tom)
-
-
-
-
- Fix a couple of places that mis-handled multibyte characters in text
- search configuration file parsing (Tom)
-
-
- Certain characters occurring in configuration files would always cause
- invalid byte sequence for encoding failures.
-
-
-
-
- Provide file name and line number location for all errors reported
- in text search configuration files (Tom)
-
-
-
-
- Fix AT TIME ZONE to first try to interpret its timezone
- argument as a timezone abbreviation, and only try it as a full timezone
- name if that fails, rather than the other way around as formerly (Tom)
-
-
- The timestamp input functions have always resolved ambiguous zone names
- in this order. Making AT TIME ZONE do so as well improves
- consistency, and fixes a compatibility bug introduced in 8.1:
- in ambiguous cases we now behave the same as 8.0 and before did,
- since in the older versions AT TIME ZONE accepted
- only abbreviations.
-
-
-
-
- Fix datetime input functions to correctly detect integer overflow when
- running on a 64-bit platform (Tom)
-
-
-
-
- Prevent integer overflows during units conversion when displaying a
- configuration parameter that has units (Tom)
-
-
-
-
- Improve performance of writing very long log messages to syslog (Tom)
-
-
-
-
- Allow spaces in the suffix part of an LDAP URL in
- pg_hba.conf (Tom)
-
-
-
-
- Fix bug in backwards scanning of a cursor on a SELECT DISTINCT
- ON query (Tom)
-
-
-
-
- Fix planner bug that could improperly push down IS NULL
- tests below an outer join (Tom)
-
-
- This was triggered by occurrence of IS NULL tests for
- the same relation in all arms of an upper OR clause.
-
-
-
-
- Fix planner bug with nested sub-select expressions (Tom)
-
-
- If the outer sub-select has no direct dependency on the parent query,
- but the inner one does, the outer value might not get recalculated
- for new parent query rows.
-
-
-
-
- Fix planner to estimate that GROUP BY expressions yielding
- boolean results always result in two groups, regardless of the
- expressions' contents (Tom)
-
-
- This is very substantially more accurate than the regular GROUP
- BY estimate for certain boolean tests like col
- IS NULL.
-
-
-
-
- Fix PL/PgSQL to not fail when a FOR loop's target variable
- is a record containing composite-type fields (Tom)
-
-
-
-
- Fix PL/Tcl to behave correctly with Tcl 8.5, and to be more careful
- about the encoding of data sent to or from Tcl (Tom)
-
-
-
-
- Improve performance of PQescapeBytea() (Rudolf Leitgeb)
-
-
-
-
- On Windows, work around a Microsoft bug by preventing
-
libpq from trying to send more than 64kB per system call - (Magnus)
-
-
-
-
- Fix
ecpg to handle variables properly in SET - commands (Michael)
-
-
-
-
- Improve
pg_dump and pg_restore's - error reporting after failure to send a SQL command (Tom)
-
-
-
-
- Fix
pg_ctl to properly preserve postmaster - command-line arguments across a restart (Bruce)
-
-
-
-
- Fix erroneous WAL file cutoff point calculation in
-
-
-
-
- Update time zone data files to
tzdata release 2008f (for - DST law changes in Argentina, Bahamas, Brazil, Mauritius, Morocco,
- Pakistan, Palestine, and Paraguay)
-
-
-
-
-
-
-
-
-
-
Release 8.3.3
-
-
-
Release date
- 2008-06-12
-
-
- This release contains one serious and one minor bug fix over 8.3.2.
- For information about new features in the 8.3 major release, see
- .
-
-
-
-
Migration to Version 8.3.3
-
- A dump/restore is not required for those running 8.3.X.
- However, if you are upgrading from a version earlier than 8.3.1,
- see the release notes for 8.3.1.
-
-
-
-
-
-
Changes
-
-
-
-
- Make pg_get_ruledef() parenthesize negative constants (Tom)
-
-
- Before this fix, a negative constant in a view or rule might be dumped
- as, say, -42::integer, which is subtly incorrect: it should
- be (-42)::integer due to operator precedence rules.
- Usually this would make little difference, but it could interact with
- another recent patch to cause
-
PostgreSQL to reject what had been a valid - SELECT DISTINCT view query. Since this could result in
-
pg_dump output failing to reload, it is being treated - as a high-priority fix. The only released versions in which dump
- output is actually incorrect are 8.3.1 and 8.2.7.
-
-
-
-
- Make ALTER AGGREGATE ... OWNER TO update
- pg_shdepend (Tom)
-
-
- This oversight could lead to problems if the aggregate was later
- involved in a DROP OWNED or REASSIGN OWNED
- operation.
-
-
-
-
-
-
-
-
-
-
Release 8.3.2
-
-
-
Release date
- never released
-
-
- This release contains a variety of fixes from 8.3.1.
- For information about new features in the 8.3 major release, see
- .
-
-
-
-
Migration to Version 8.3.2
-
- A dump/restore is not required for those running 8.3.X.
- However, if you are upgrading from a version earlier than 8.3.1,
- see the release notes for 8.3.1.
-
-
-
-
-
-
Changes
-
-
-
-
- Fix ERRORDATA_STACK_SIZE exceeded crash that
- occurred on Windows when using UTF-8 database encoding and a different
- client encoding (Tom)
-
-
-
-
- Fix incorrect archive truncation point calculation for the
- %r macro in recovery_command parameters
- (Simon)
-
-
- This could lead to data loss if a warm-standby script relied on
- %r to decide when to throw away WAL segment files.
-
-
-
-
- Fix ALTER TABLE ADD COLUMN ... PRIMARY KEY so that the new
- column is correctly checked to see if it's been initialized to all
- non-nulls (Brendan Jurd)
-
-
- Previous versions neglected to check this requirement at all.
-
-
-
-
- Fix REASSIGN OWNED so that it works on procedural
- languages too (Alvaro)
-
-
-
-
- Fix problems with SELECT FOR UPDATE/SHARE occurring as a
- subquery in a query with a non-SELECT top-level operation
- (Tom)
-
-
-
-
- Fix possible CREATE TABLE failure when inheriting the
- same constraint from multiple parent relations that
- inherited that constraint from a common ancestor (Tom)
-
-
-
-
- Fix pg_get_ruledef() to show the alias, if any, attached
- to the target table of an UPDATE or DELETE
- (Tom)
-
-
-
-
- Restore the pre-8.3 behavior that an out-of-range block number in a
- TID being used in a TidScan plan results in silently not matching any
- rows (Tom)
-
-
- 8.3.0 and 8.3.1 threw an error instead.
-
-
-
-
- Fix GIN bug that could result in a too many LWLocks
- taken failure (Teodor)
-
-
-
-
- Fix broken GiST comparison function for tsquery (Teodor)
-
-
-
-
- Fix tsvector_update_trigger() and ts_stat()
- to accept domains over the types they expect to work with (Tom)
-
-
-
-
- Fix failure to support enum data types as foreign keys (Tom)
-
-
-
-
- Avoid possible crash when decompressing corrupted data
- (Zdenek Kotala)
-
-
-
-
- Fix race conditions between delayed unlinks and DROP
- DATABASE (Heikki)
-
-
- In the worst case this could result in deleting a newly created table
- in a new database that happened to get the same OID as the
- recently-dropped one; but of course that is an extremely
- low-probability scenario.
-
-
-
-
- Repair two places where SIGTERM exit of a backend could leave corrupted
- state in shared memory (Tom)
-
-
- Neither case is very important if SIGTERM is used to shut down the
- whole database cluster together, but there was a problem if someone
- tried to SIGTERM individual backends.
-
-
-
-
- Fix possible crash due to incorrect plan generated for an
- x IN (SELECT y
- FROM ...) clause when x and y
- have different data types; and make sure the behavior is semantically
- correct when the conversion from y's type to
- x's type is lossy (Tom)
-
-
-
-
- Fix oversight that prevented the planner from substituting known Param
- values as if they were constants (Tom)
-
-
- This mistake partially disabled optimization of unnamed
- extended-Query statements in 8.3.0 and 8.3.1: in particular the
- LIKE-to-indexscan optimization would never be applied if the LIKE
- pattern was passed as a parameter, and constraint exclusion
- depending on a parameter value didn't work either.
-
-
-
-
- Fix planner failure when an indexable MIN or
- MAX aggregate is used with DISTINCT or
- ORDER BY (Tom)
-
-
-
-
- Fix planner to ensure it never uses a physical tlist for a
- plan node that is feeding a Sort node (Tom)
-
-
- This led to the sort having to push around more data than it really
- needed to, since unused column values were included in the sorted
- data.
-
-
-
-
- Avoid unnecessary copying of query strings (Tom)
-
-
- This fixes a performance problem introduced in 8.3.0 when a very large
- number of commands are submitted as a single query string.
-
-
-
-
- Make TransactionIdIsCurrentTransactionId() use binary
- search instead of linear search when checking child-transaction XIDs
- (Heikki)
-
-
- This fixes some cases in which 8.3.0 was significantly
- slower than earlier releases.
-
-
-
-
- Fix conversions between ISO-8859-5 and other encodings to handle
- Cyrillic Yo characters (e and E with
- two dots) (Sergey Burladyan)
-
-
-
-
- Fix several datatype input functions, notably array_in(),
- that were allowing unused bytes in their results to contain
- uninitialized, unpredictable values (Tom)
-
-
- This could lead to failures in which two apparently identical literal
- values were not seen as equal, resulting in the parser complaining
- about unmatched ORDER BY and DISTINCT
- expressions.
-
-
-
-
- Fix a corner case in regular-expression substring matching
- (substring(string from
- pattern)) (Tom)
-
-
- The problem occurs when there is a match to the pattern overall but
- the user has specified a parenthesized subexpression and that
- subexpression hasn't got a match. An example is
- substring('foo' from 'foo(bar)?').
- This should return NULL, since (bar) isn't matched, but
- it was mistakenly returning the whole-pattern match instead (ie,
- foo).
-
-
-
-
- Prevent cancellation of an auto-vacuum that was launched to prevent
- XID wraparound (Alvaro)
-
-
-
-
- Improve ANALYZE's handling of in-doubt tuples (those
- inserted or deleted by a not-yet-committed transaction) so that the
- counts it reports to the stats collector are more likely to be correct
- (Pavan Deolasee)
-
-
-
-
- Fix
initdb to reject a relative path for its - --xlogdir (-X) option (Tom)
-
-
-
-
- Make
psql print tab characters as an appropriate - number of spaces, rather than \x09 as was done in
- 8.3.0 and 8.3.1 (Bruce)
-
-
-
-
- Update time zone data files to
tzdata release 2008c (for - DST law changes in Morocco, Iraq, Choibalsan, Pakistan, Syria, Cuba, and
- Argentina/San_Luis)
-
-
-
-
- Add ECPGget_PGconn() function to
-
-
-
-
- Fix incorrect result from
ecpg's - PGTYPEStimestamp_sub() function (Michael)
-
-
-
-
- Fix handling of continuation line markers in
ecpg - (Michael)
-
-
-
-
- Fix possible crashes in contrib/cube functions (Tom)
-
-
-
-
- Fix core dump in contrib/xml2's
- xpath_table() function when the input query returns a
- NULL value (Tom)
-
-
-
-
- Fix contrib/xml2's makefile to not override
- CFLAGS, and make it auto-configure properly for
-
libxslt present or not (Tom) -
-
-
-
-
-
-
-
-
-
Release 8.3.1
-
-
-
Release date
- 2008-03-17
-
-
- This release contains a variety of fixes from 8.3.0.
- For information about new features in the 8.3 major release, see
- .
-
-
-
-
Migration to Version 8.3.1
-
- A dump/restore is not required for those running 8.3.X.
- However, you might need to REINDEX indexes on textual
- columns after updating, if you are affected by the Windows locale
- issue described below.
-
-
-
-
-
-
Changes
-
-
-
-
- Fix character string comparison for Windows locales that consider
- different character combinations as equal (Tom)
-
-
- This fix applies only on Windows and only when using UTF-8
- database encoding. The same fix was made for all other cases
- over two years ago, but Windows with UTF-8 uses a separate code
- path that was not updated. If you are using a locale that
- considers some non-identical strings as equal, you may need to
- REINDEX to fix existing indexes on textual columns.
-
-
-
-
- Repair corner-case bugs in VACUUM FULL (Tom)
-
-
- A potential deadlock between concurrent VACUUM FULL
- operations on different system catalogs was introduced in 8.2.
- This has now been corrected. 8.3 made this worse because the
- deadlock could occur within a critical code section, making it
- a PANIC rather than just ERROR condition.
-
-
- Also, a VACUUM FULL that failed partway through
- vacuuming a system catalog could result in cache corruption in
- concurrent database sessions.
-
-
- Another VACUUM FULL bug introduced in 8.3 could
- result in a crash or out-of-memory report when dealing with
- pages containing no live tuples.
-
-
-
-
- Fix misbehavior of foreign key checks involving character
- or bit columns (Tom)
-
-
- If the referencing column were of a different but compatible type
- (for instance varchar), the constraint was enforced incorrectly.
-
-
-
-
- Avoid needless deadlock failures in no-op foreign-key checks (Stephan
- Szabo, Tom)
-
-
-
-
- Fix possible core dump when re-planning a prepared query (Tom)
-
-
- This bug affected only protocol-level prepare operations, not
- SQL PREPARE, and so tended to be seen only with
- JDBC, DBI, and other client-side drivers that use prepared
- statements heavily.
-
-
-
-
- Fix possible failure when re-planning a query that calls an SPI-using
- function (Tom)
-
-
-
-
- Fix failure in row-wise comparisons involving columns of different
- datatypes (Tom)
-
-
-
-
- Fix longstanding LISTEN/NOTIFY
- race condition (Tom)
-
-
- In rare cases a session that had just executed a
- LISTEN might not get a notification, even though
- one would be expected because the concurrent transaction executing
- NOTIFY was observed to commit later.
-
-
- A side effect of the fix is that a transaction that has executed
- a not-yet-committed LISTEN command will not see any
- row in pg_listener for the LISTEN,
- should it choose to look; formerly it would have. This behavior
- was never documented one way or the other, but it is possible that
- some applications depend on the old behavior.
-
-
-
-
- Disallow LISTEN and UNLISTEN within a
- prepared transaction (Tom)
-
-
- This was formerly allowed but trying to do it had various unpleasant
- consequences, notably that the originating backend could not exit
- as long as an UNLISTEN remained uncommitted.
-
-
-
-
- Disallow dropping a temporary table within a
- prepared transaction (Heikki)
-
-
- This was correctly disallowed by 8.1, but the check was inadvertently
- broken in 8.2 and 8.3.
-
-
-
-
- Fix rare crash when an error occurs during a query using a hash index
- (Heikki)
-
-
-
-
- Fix incorrect comparison of tsquery values (Teodor)
-
-
-
-
- Fix incorrect behavior of LIKE with non-ASCII characters
- in single-byte encodings (Rolf Jentsch)
-
-
-
-
- Disable xmlvalidate (Tom)
-
-
- This function should have been removed before 8.3 release, but
- was inadvertently left in the source code. It poses a small
- security risk since unprivileged users could use it to read the
- first few characters of any file accessible to the server.
-
-
-
-
- Fix memory leaks in certain usages of set-returning functions (Neil)
-
-
-
-
- Make encode(bytea, 'escape') convert all
- high-bit-set byte values into \nnn octal
- escape sequences (Tom)
-
-
- This is necessary to avoid encoding problems when the database
- encoding is multi-byte. This change could pose compatibility issues
- for applications that are expecting specific results from
- encode.
-
-
-
-
- Fix input of datetime values for February 29 in years BC (Tom)
-
-
- The former coding was mistaken about which years were leap years.
-
-
-
-
- Fix unrecognized node type error in some variants of
- ALTER OWNER (Tom)
-
-
-
-
- Avoid tablespace permissions errors in CREATE TABLE LIKE
- INCLUDING INDEXES (Tom)
-
-
-
-
- Ensure pg_stat_activity.waiting flag
- is cleared when a lock wait is aborted (Tom)
-
-
-
-
- Fix handling of process permissions on Windows Vista (Dave, Magnus)
-
-
- In particular, this fix allows starting the server as the Administrator
- user.
-
-
-
-
- Update time zone data files to
tzdata release 2008a - (in particular, recent Chile changes); adjust timezone abbreviation
- VET (Venezuela) to mean UTC-4:30, not UTC-4:00 (Tom)
-
-
-
-
- Fix
ecpg problems with arrays (Michael) -
-
-
-
- Fix
pg_ctl to correctly extract the postmaster's port - number from command-line options (Itagaki Takahiro, Tom)
-
-
- Previously, pg_ctl start -w could try to contact the
- postmaster on the wrong port, leading to bogus reports of startup
- failure.
-
-
-
-
- Use -fwrapv to defend against possible misoptimization
- in recent
gcc versions (Tom) -
-
- This is known to be necessary when building
PostgreSQL -
-
-
-
- Enable building contrib/uuid-ossp with MSVC (Hiroshi Saito)
-
-
-
-
-
-
-
-
-
-
Release 8.3
-
-
-
Release date
- 2008-02-04
-
-
-
-
Overview
-
- With significant new functionality and performance enhancements,
- this release represents a major leap forward for
-
PostgreSQL. This was made possible by a growing - community that has dramatically accelerated the pace of
- development. This release adds the following major features:
-
-
-
-
-
- Full text search is integrated into the core database system
-
-
-
-
- Support for the SQL/XML standard, including new operators and an
- XML data type
-
-
-
-
- Enumerated data types (ENUM )
-
-
-
-
- Arrays of composite types
-
-
-
-
- Universally Unique Identifier (UUID) data type
-
-
-
-
- Add control over whether NULLs sort first or last
-
-
-
-
- Updatable cursors
-
-
-
-
- Server configuration parameters can now be set on a per-function
- basis
-
-
-
-
- User-defined types can now have type modifiers
-
-
-
-
- Automatically re-plan cached queries when table
- definitions change or statistics are updated
-
-
-
-
- Numerous improvements in logging and statistics collection
-
-
-
-
- Support Security Service Provider Interface (
SSPI) for - authentication on Windows
-
-
-
-
- Support multiple concurrent autovacuum processes, and other
- autovacuum improvements
-
-
-
-
- Allow the whole
PostgreSQL distribution to be compiled - with
Microsoft Visual C++ -
-
-
-
-
- Major performance improvements are listed below. Most of
- these enhancements are automatic and do not require user changes or
- tuning:
-
-
-
-
-
- Asynchronous commit delays writes to WAL during transaction commit
-
-
-
-
- Checkpoint writes can be spread over a longer time period to smooth
- the I/O spike during each checkpoint
-
-
-
-
- Heap-Only Tuples (
HOT) accelerate space reuse for - most UPDATEs and DELETEs
-
-
-
-
- Just-in-time background writer strategy improves disk write
- efficiency
-
-
-
-
- Using non-persistent transaction IDs for read-only transactions
- reduces overhead and VACUUM requirements
-
-
-
-
- Per-field and per-row storage overhead has been reduced
-
-
-
-
- Large sequential scans no longer force out frequently used
- cached pages
-
-
-
-
- Concurrent large sequential scans can now share disk reads
-
-
-
-
- ORDER BY ... LIMIT can be done without sorting
-
-
-
-
-
- The above items are explained in more detail in the sections below.
-
-
-
-
-
-
Migration to Version 8.3
-
- A dump/restore using
pg_dump is
- required for those wishing to migrate data from any previous
- release.
-
-
- Observe the following incompatibilities:
-
-
-
-
General
-
-
-
- Non-character data types are no longer automatically cast to
- TEXT (Peter, Tom)
-
-
- Previously, if a non-character value was supplied to an operator or
- function that requires text input, it was automatically
- cast to text, for most (though not all) built-in data types.
- This no longer happens: an explicit cast to text is now
- required for all non-character-string types. For example, these
- expressions formerly worked:
-
-substr(current_date, 1, 4)
-23 LIKE '2%'
-
-
- but will now draw function does not exist and operator
- does not exist errors respectively. Use an explicit cast instead:
-
-substr(current_date::text, 1, 4)
-23::text LIKE '2%'
-
-
- (Of course, you can use the more verbose CAST() syntax too.)
- The reason for the change is that these automatic casts too often caused
- surprising behavior. An example is that in previous releases, this
- expression was accepted but did not do what was expected:
-
-current_date < 2017-11-17
-
-
- This is actually comparing a date to an integer, which should be
- (and now is) rejected — but in the presence of automatic
- casts both sides were cast to text and a textual comparison
- was done, because the text < text operator was able
- to match the expression when no other < operator could.
-
-
- Types char(n) and
- varchar(n) still cast to text
- automatically. Also, automatic casting to text still works for
- inputs to the concatenation (||) operator, so long as least
- one input is a character-string type.
-
-
-
-
- Full text search features from contrib/tsearch2 have
- been moved into the core server, with some minor syntax changes
-
-
- contrib/tsearch2 now contains a compatibility
- interface.
-
-
-
-
- ARRAY(SELECT ...) , where the SELECT
- returns no rows, now returns an empty array, rather than NULL
- (Tom)
-
-
-
-
- The array type name for a base data type is no longer always the base
- type's name with an underscore prefix
-
-
- The old naming convention is still honored when possible, but
- application code should no longer depend on it. Instead
- use the new pg_type.typarray column to
- identify the array data type associated with a given type.
-
-
-
-
- ORDER BY ... USING operator must now
- use a less-than or greater-than operator that is
- defined in a btree operator class
-
-
- This restriction was added to prevent inconsistent results.
-
-
-
-
- SET LOCAL changes now persist until
- the end of the outermost transaction, unless rolled back (Tom)
-
-
- Previously SET LOCAL 's effects were lost
- after subtransaction commit (RELEASE SAVEPOINT
- or exit from a PL/pgSQL exception block).
-
-
-
-
- Commands rejected in transaction blocks are now also rejected in
- multiple-statement query strings (Tom)
-
-
- For example, "BEGIN; DROP DATABASE; COMMIT" will now be
- rejected even if submitted as a single query message.
-
-
-
-
- ROLLBACK outside a transaction block now
- issues NOTICE instead of WARNING (Bruce)
-
-
-
-
- Prevent NOTIFY /LISTEN /UNLISTEN
- from accepting schema-qualified names (Bruce)
-
-
- Formerly, these commands accepted schema.relation but
- ignored the schema part, which was confusing.
-
-
-
-
- ALTER SEQUENCE no longer affects the sequence's
- currval() state (Tom)
-
-
-
-
- Foreign keys now must match indexable conditions for
- cross-data-type references (Tom)
-
-
- This improves semantic consistency and helps avoid
- performance problems.
-
-
-
-
- Restrict object size functions to users who have reasonable
- permissions to view such information (Tom)
-
-
- For example, pg_database_size() now requires
- CONNECT permission, which is granted to everyone by
- default. pg_tablespace_size() requires
- CREATE permission in the tablespace, or is allowed if
- the tablespace is the default tablespace for the database.
-
-
-
-
- Remove the undocumented !!= (not in) operator (Tom)
-
-
- NOT IN (SELECT ...) is the proper way to
- perform this operation.
-
-
-
-
- Internal hashing functions are now more uniformly-distributed (Tom)
-
-
- If application code was computing and storing hash values using
- internal
PostgreSQL hashing functions, the hash - values must be regenerated.
-
-
-
-
- C-code conventions for handling variable-length data values
- have changed (Greg Stark, Tom)
-
-
- The new SET_VARSIZE() macro must be used
- to set the length of generated varlena values. Also, it
- might be necessary to expand (de-TOAST
) input values
- in more cases.
-
-
-
-
- Continuous archiving no longer reports each successful archive
- operation to the server logs unless DEBUG level is used
- (Simon)
-
-
-
-
-
-
-
-
-
Configuration Parameters
-
-
-
-
- Numerous changes in administrative server parameters
-
-
- bgwriter_lru_percent,
- bgwriter_all_percent,
- bgwriter_all_maxpages,
- stats_start_collector, and
- stats_reset_on_server_start are removed.
- redirect_stderr is renamed to
- logging_collector.
- stats_command_string is renamed to
- track_activities.
- stats_block_level and stats_row_level
- are merged into track_counts.
- A new boolean configuration parameter, archive_mode,
- controls archiving. Autovacuum's default settings have changed.
-
-
-
-
- Remove stats_start_collector parameter (Tom)
-
-
- We now always start the collector process, unless
UDP - socket creation fails.
-
-
-
-
- Remove stats_reset_on_server_start parameter (Tom)
-
-
- This was removed because pg_stat_reset()
- can be used for this purpose.
-
-
-
-
- Commenting out a parameter in postgresql.conf now
- causes it to revert to its default value (Joachim Wieland)
-
-
- Previously, commenting out an entry left the parameter's value unchanged
- until the next server restart.
-
-
-
-
-
-
-
-
-
-
Character Encodings
-
-
-
-
- Add more checks for invalidly-encoded data (Andrew)
-
-
- This change plugs some holes that existed in literal backslash
- escape string processing and COPY escape
- processing. Now the de-escaped string is rechecked to see if the
- result created an invalid multi-byte character.
-
-
-
-
- Disallow database encodings that are inconsistent with the server's
- locale setting (Tom)
-
-
- On most platforms, C locale is the only locale that
- will work with any database encoding. Other locale settings imply
- a specific encoding and will misbehave if the database encoding
- is something different. (Typical symptoms include bogus textual
- sort order and wrong results from upper() or
- lower().) The server now rejects attempts to create
- databases that have an incompatible encoding.
-
-
-
-
- Ensure that chr() cannot create
- invalidly-encoded values (Andrew)
-
-
- In UTF8-encoded databases the argument of chr() is
- now treated as a Unicode code point. In other multi-byte encodings
- chr() 's argument must designate a 7-bit ASCII
- character. Zero is no longer accepted.
- ascii() has been adjusted to match.
-
-
-
-
- Adjust convert() behavior to ensure encoding
- validity (Andrew)
-
-
- The two argument form of convert() has been
- removed. The three argument form now takes a bytea
- first argument and returns a bytea . To cover the
- loss of functionality, three new functions have been added:
-
-
-
-
- convert_from(bytea, name) returns
- text — converts the first argument from the named
- encoding to the database encoding
-
-
-
-
- convert_to(text, name) returns
- bytea — converts the first argument from the
- database encoding to the named encoding
-
-
-
-
- length(bytea, name) returns
- integer — gives the length of the first
- argument in characters in the named encoding
-
-
-
-
-
-
- Remove convert(argument USING conversion_name)
- (Andrew)
-
-
- Its behavior did not match the SQL standard.
-
-
-
-
- Make JOHAB encoding client-only (Tatsuo)
-
-
- JOHAB is not safe as a server-side encoding.
-
-
-
-
-
-
-
-
-
-
-
Changes
-
- Below you will find a detailed account of the
- changes between
PostgreSQL 8.3 and
- the previous major release.
-
-
-
-
Performance
-
-
-
- Asynchronous commit delays writes to WAL during transaction commit
- (Simon)
-
-
- This feature dramatically increases performance for short data-modifying
- transactions. The disadvantage is that because disk writes are delayed,
- if the database or operating system crashes before data is written to
- the disk, committed data will be lost. This feature is useful for
- applications that can accept some data loss. Unlike turning off
- fsync , using asynchronous commit does not put
- database consistency at risk; the worst case is that after a crash the
- last few reportedly-committed transactions might not be committed after
- all.
- This feature is enabled by turning off synchronous_commit
- (which can be done per-session or per-transaction, if some transactions
- are critical and others are not).
- wal_writer_delay can be adjusted to control the maximum
- delay before transactions actually reach disk.
-
-
-
-
- Checkpoint writes can be spread over a longer time period to smooth
- the I/O spike during each checkpoint (Itagaki Takahiro and Heikki
- Linnakangas)
-
-
- Previously all modified buffers were forced to disk as quickly as
- possible during a
- checkpoint, causing an I/O spike that decreased server performance.
- This new approach spreads out disk writes during checkpoints,
- reducing peak I/O usage. (User-requested and shutdown checkpoints
- are still written as quickly as possible.)
-
-
-
-
- Heap-Only Tuples (
HOT) accelerate space reuse for most - UPDATEs and DELETEs (Pavan Deolasee, with
- ideas from many others)
-
-
- UPDATEs and DELETEs leave dead tuples
- behind, as do failed INSERTs. Previously only
- VACUUM could reclaim space taken by dead tuples. With
-
HOT dead tuple space can be automatically reclaimed at - the time of INSERT or UPDATE if no changes
- are made to indexed columns. This allows for more consistent
- performance. Also,
HOT avoids adding duplicate index - entries.
-
-
-
-
- Just-in-time background writer strategy improves disk write
- efficiency (Greg Smith, Itagaki Takahiro)
-
-
- This greatly reduces the need for manual tuning of the background
- writer.
-
-
-
-
- Per-field and per-row storage overhead have been reduced
- (Greg Stark, Heikki Linnakangas)
-
-
- Variable-length data types with data values less than 128 bytes long
- will see a storage decrease of 3 to 6 bytes. For example, two adjacent
- char(1) fields now use 4 bytes instead of 16. Row headers
- are also 4 bytes shorter than before.
-
-
-
-
- Using non-persistent transaction IDs for read-only transactions
- reduces overhead and VACUUM requirements (Florian Pflug)
-
-
- Non-persistent transaction IDs do not increment the global
- transaction counter. Therefore, they reduce the load on
- pg_clog and increase the time between forced
- vacuums to prevent transaction ID wraparound.
- Other performance
- improvements were also made that should improve concurrency.
-
-
-
-
- Avoid incrementing the command counter after a read-only command (Tom)
-
-
- There was formerly a hard limit of 232
- (4 billion) commands per transaction. Now only commands that
- actually changed the database count, so while this limit still
- exists, it should be significantly less annoying.
-
-
-
-
- Create a dedicated
WAL writer process to off-load - work from backends (Simon)
-
-
-
-
- Skip unnecessary WAL writes for CLUSTER and
- COPY (Simon)
-
-
- Unless WAL archiving is enabled, the system now avoids WAL writes
- for CLUSTER and just fsync()s the
- table at the end of the command. It also does the same for
- COPY if the table was created in the same
- transaction.
-
-
-
-
- Large sequential scans no longer force out frequently used
- cached pages (Simon, Heikki, Tom)
-
-
-
-
- Concurrent large sequential scans can now share disk reads (Jeff Davis)
-
-
- This is accomplished by starting the new sequential scan in the
- middle of the table (where another sequential scan is already
- in-progress) and wrapping around to the beginning to finish. This
- can affect the order of returned rows in a query that does not
- specify ORDER BY. The synchronize_seqscans
- configuration parameter can be used to disable this if necessary.
-
-
-
-
- ORDER BY ... LIMIT can be done without sorting
- (Greg Stark)
-
-
- This is done by sequentially scanning the table and tracking just
- the top N candidate rows, rather than performing a
- full sort of the entire table. This is useful when there is no
- matching index and the LIMIT is not large.
-
-
-
-
- Put a rate limit on messages sent to the statistics
- collector by backends
- (Tom)
-
-
- This reduces overhead for short transactions, but might sometimes
- increase the delay before statistics are tallied.
-
-
-
-
- Improve hash join performance for cases with many NULLs (Tom)
-
-
-
-
- Speed up operator lookup for cases with non-exact datatype matches (Tom)
-
-
-
-
-
-
-
-
-
Server
-
-
-
- Autovacuum is now enabled by default (Alvaro)
-
-
- Several changes were made to eliminate disadvantages of having
- autovacuum enabled, thereby justifying the change in default.
- Several other autovacuum parameter defaults were also modified.
-
-
-
-
- Support multiple concurrent autovacuum processes (Alvaro, Itagaki
- Takahiro)
-
-
- This allows multiple vacuums to run concurrently. This prevents
- vacuuming of a large table from delaying vacuuming of smaller tables.
-
-
-
-
- Automatically re-plan cached queries when table
- definitions change or statistics are updated (Tom)
-
-
- Previously PL/PgSQL functions that referenced temporary tables
- would fail if the temporary table was dropped and recreated
- between function invocations, unless EXECUTE was
- used. This improvement fixes that problem and many related issues.
-
-
-
-
- Add a temp_tablespaces parameter to control
- the tablespaces for temporary tables and files (Jaime Casanova,
- Albert Cervera, Bernd Helmle)
-
-
- This parameter defines a list of tablespaces to be used. This
- enables spreading the I/O load across multiple tablespaces. A random
- tablespace is chosen each time a temporary object is created.
- Temporary files are no longer stored in per-database
- pgsql_tmp/ directories but in per-tablespace
- directories.
-
-
-
-
- Place temporary tables' TOAST tables in special schemas named
- pg_toast_temp_nnn (Tom)
-
-
- This allows low-level code to recognize these tables as temporary,
- which enables various optimizations such as not WAL-logging changes
- and using local rather than shared buffers for access. This also
- fixes a bug wherein backends unexpectedly held open file references
- to temporary TOAST tables.
-
-
-
-
- Fix problem that a constant flow of new connection requests could
- indefinitely delay the postmaster from completing a shutdown or
- a crash restart (Tom)
-
-
-
-
- Guard against a very-low-probability data loss scenario by preventing
- re-use of a deleted table's relfilenode until after the next
- checkpoint (Heikki)
-
-
-
-
- Fix CREATE CONSTRAINT TRIGGER
- to convert old-style foreign key trigger definitions into regular
- foreign key constraints (Tom)
-
-
- This will ease porting of foreign key constraints carried forward from
- pre-7.3 databases, if they were never converted using
- contrib/adddepend.
-
-
-
-
- Fix DEFAULT NULL to override inherited defaults (Tom)
-
-
- DEFAULT NULL was formerly considered a noise phrase, but it
- should (and now does) override non-null defaults that would otherwise
- be inherited from a parent table or domain.
-
-
-
-
- Add new encodings EUC_JIS_2004 and SHIFT_JIS_2004 (Tatsuo)
-
-
- These new encodings can be converted to and from UTF-8.
-
-
-
-
- Change server startup log message from database system is
- ready to database system is ready to accept
- connections, and adjust its timing
-
-
- The message now appears only when the postmaster is really ready
- to accept connections.
-
-
-
-
-
-
-
-
-
Monitoring
-
-
-
- Add log_autovacuum_min_duration parameter to
- support configurable logging of autovacuum activity (Simon, Alvaro)
-
-
-
-
- Add log_lock_waits parameter to log lock waiting
- (Simon)
-
-
-
-
- Add log_temp_files parameter to log temporary
- file usage (Bill Moran)
-
-
-
-
- Add log_checkpoints parameter to improve logging
- of checkpoints (Greg Smith, Heikki)
-
-
-
-
- log_line_prefix now supports
- %s and %c escapes in all
- processes (Andrew)
-
-
- Previously these escapes worked only for user sessions, not for
- background database processes.
-
-
-
-
- Add log_restartpoints to control logging of
- point-in-time recovery restart points (Simon)
-
-
-
-
- Last transaction end time is now logged at end of recovery and at
- each logged restart point (Simon)
-
-
-
-
- Autovacuum now reports its activity start time in
- pg_stat_activity (Tom)
-
-
-
-
- Allow server log output in comma-separated value (CSV) format (Arul
- Shaji, Greg Smith, Andrew Dunstan)
-
-
- CSV-format log files can easily be loaded into a database table for
- subsequent analysis.
-
-
-
-
- Use PostgreSQL-supplied timezone support for formatting timestamps
- displayed in the server log (Tom)
-
-
- This avoids Windows-specific problems with localized time zone
- names that are in the wrong encoding. There is a new
- log_timezone parameter that controls the timezone
- used in log messages, independently of the client-visible
- timezone parameter.
-
-
-
-
- New system view pg_stat_bgwriter displays
- statistics about background writer activity (Magnus)
-
-
-
-
- Add new columns for database-wide tuple statistics to
- pg_stat_database (Magnus)
-
-
-
-
- Add an xact_start (transaction start time) column to
- pg_stat_activity (Neil)
-
-
- This makes it easier to identify long-running transactions.
-
-
-
-
- Add n_live_tuples and n_dead_tuples columns
- to pg_stat_all_tables and related views (Glen
- Parker)
-
-
-
-
- Merge stats_block_level and stats_row_level
- parameters into a single parameter track_counts, which
- controls all messages sent to the statistics collector process
- (Tom)
-
-
-
-
- Rename stats_command_string parameter to
- track_activities (Tom)
-
-
-
-
- Fix statistical counting of live and dead tuples to recognize that
- committed and aborted transactions have different effects (Tom)
-
-
-
-
-
-
-
-
-
Authentication
-
-
-
- Support Security Service Provider Interface (
SSPI) for - authentication on Windows (Magnus)
-
-
-
-
- Support GSSAPI authentication (Henry Hotz, Magnus)
-
-
- This should be preferred to native Kerberos authentication because
- GSSAPI is an industry standard.
-
-
-
-
- Support a global SSL configuration file (Victor Wagner)
-
-
-
-
- Add ssl_ciphers parameter to control accepted SSL ciphers
- (Victor Wagner)
-
-
-
-
- Add a Kerberos realm parameter, krb_realm (Magnus)
-
-
-
-
-
-
-
-
-
Write-Ahead Log (<acronym>WAL</>) and Continuous Archiving
-
-
-
- Change the timestamps recorded in transaction WAL records from
- time_t to TimestampTz representation (Tom)
-
-
- This provides sub-second resolution in WAL, which can be useful for
- point-in-time recovery.
-
-
-
-
- Reduce WAL disk space needed by warm standby servers (Simon)
-
-
- This change allows a warm standby server to pass the name of the earliest
- still-needed WAL file to the recovery script, allowing automatic removal
- of no-longer-needed WAL files. This is done using %r in
- the restore_command parameter of
- recovery.conf .
-
-
-
-
- New boolean configuration parameter, archive_mode,
- controls archiving (Simon)
-
-
- Previously setting archive_command to an empty string
- turned off archiving. Now archive_mode turns archiving
- on and off, independently of archive_command. This is
- useful for stopping archiving temporarily.
-
-
-
-
-
-
-
-
-
Queries
-
-
-
- Full text search is integrated into the core database
- system (Teodor, Oleg)
-
-
- Text search has been improved, moved into the core code, and is now
- installed by default. contrib/tsearch2 now contains
- a compatibility interface.
-
-
-
-
- Add control over whether NULLs sort first or last (Teodor, Tom)
-
-
- The syntax is ORDER BY ... NULLS FIRST/LAST.
-
-
-
-
- Allow per-column ascending/descending (ASC/DESC)
- ordering options for indexes (Teodor, Tom)
-
-
- Previously a query using ORDER BY with mixed
- ASC/DESC specifiers could not fully use
- an index. Now an index can be fully used in such cases if the
- index was created with matching
- ASC/DESC specifications.
- NULL sort order within an index can be controlled, too.
-
-
-
-
- Allow col IS NULL to use an index (Teodor)
-
-
-
-
- Updatable cursors (Arul Shaji, Tom)
-
-
- This eliminates the need to reference a primary key to
- UPDATE or DELETE rows returned by a cursor.
- The syntax is UPDATE/DELETE WHERE CURRENT OF.
-
-
-
-
- Allow FOR UPDATE in cursors (Arul Shaji, Tom)
-
-
-
-
- Create a general mechanism that supports casts to and from the
- standard string types (TEXT , VARCHAR ,
- CHAR ) for every datatype, by
- invoking the datatype's I/O functions (Tom)
-
-
- Previously, such casts were available only for types that had
- specialized function(s) for the purpose.
- These new casts are assignment-only in the to-string direction,
- explicit-only in the other direction, and therefore should create no
- surprising behavior.
-
-
-
-
- Allow UNION and related constructs to return a domain
- type, when all inputs are of that domain type (Tom)
-
-
- Formerly, the output would be considered to be of the domain's base
- type.
-
-
-
-
- Allow limited hashing when using two different data types (Tom)
-
-
- This allows hash joins, hash indexes, hashed subplans, and hash
- aggregation to be used in situations involving cross-data-type
- comparisons, if the data types have compatible hash functions.
- Currently, cross-data-type hashing support exists for
- smallint /integer /bigint ,
- and for float4 /float8 .
-
-
-
-
- Improve optimizer logic for detecting when variables are equal
- in a WHERE clause (Tom)
-
-
- This allows mergejoins to work with descending sort orders, and
- improves recognition of redundant sort columns.
-
-
-
-
- Improve performance when planning large inheritance trees in
- cases where most tables are excluded by constraints (Tom)
-
-
-
-
-
-
-
-
-
Object Manipulation
-
-
-
-
- Arrays of composite types (David Fetter, Andrew, Tom)
-
-
- In addition to arrays of explicitly-declared composite types,
- arrays of the rowtypes of regular tables and views are now
- supported, except for rowtypes of system catalogs, sequences, and TOAST
- tables.
-
-
-
-
-
- Server configuration parameters can now be set on a per-function
- basis (Tom)
-
-
- For example, functions can now set their own
- search_path to prevent unexpected behavior if a
- different search_path exists at run-time. Security
- definer functions should set search_path to
- avoid security loopholes.
-
-
-
-
- CREATE/ALTER FUNCTION now supports
- COST and ROWS options (Tom)
-
-
- COST allows specification of the cost of a
- function call. ROWS allows specification of
- the average number or rows returned by a set-returning function.
- These values are used by the optimizer in choosing the best plan.
-
-
-
-
- Implement CREATE TABLE LIKE ... INCLUDING
- INDEXES (Trevor Hardcastle, Nikhil Sontakke, Neil)
-
-
-
-
- Allow CREATE INDEX CONCURRENTLY to ignore
- transactions in other databases (Simon)
-
-
-
-
- Add ALTER VIEW ... RENAME TO and ALTER
- SEQUENCE ... RENAME TO (David Fetter, Neil)
-
-
- Previously this could only be done via ALTER TABLE ...
- RENAME TO.
-
-
-
-
- Make CREATE/DROP/RENAME DATABASE wait briefly for
- conflicting backends to exit before failing (Tom)
-
-
- This increases the likelihood that these commands will succeed.
-
-
-
-
- Allow triggers and rules to be deactivated in groups using a
- configuration parameter, for replication purposes (Jan)
-
-
- This allows replication systems to disable triggers and rewrite
- rules as a group without modifying the system catalogs directly.
- The behavior is controlled by ALTER TABLE and a new
- parameter session_replication_role .
-
-
-
-
- User-defined types can now have type modifiers (Teodor, Tom)
-
-
- This allows a user-defined type to take a modifier, like
- ssnum(7). Previously only built-in
- data types could have modifiers.
-
-
-
-
-
-
-
-
-
Utility Commands
-
-
-
- Non-superuser database owners now are able to add trusted procedural
- languages to their databases by default (Jeremy Drake)
-
-
- While this is reasonably safe, some administrators might wish to
- revoke the privilege. It is controlled by
- pg_pltemplate.tmpldbacreate.
-
-
-
-
- Allow a session's current parameter setting to be used as the
- default for future sessions (Tom)
-
-
- This is done with SET ... FROM CURRENT in
- CREATE/ALTER FUNCTION , ALTER
- DATABASE, or ALTER ROLE .
-
-
-
-
- Implement new commands DISCARD ALL ,
- DISCARD PLANS , DISCARD
- TEMPORARY, CLOSE ALL , and
- DEALLOCATE ALL (Marko Kreen, Neil)
-
-
- These commands simplify resetting a database session to its initial
- state, and are particularly useful for connection-pooling software.
-
-
-
-
- Make CLUSTER MVCC-safe (Heikki Linnakangas)
-
-
- Formerly, CLUSTER would discard all tuples
- that were committed dead, even if there were still transactions
- that should be able to see them under MVCC visibility rules.
-
-
-
-
- Add new CLUSTER syntax: CLUSTER
- table USING index
- (Holger Schurig)
-
-
- The old CLUSTER syntax is still supported, but
- the new form is considered more logical.
-
-
-
-
- Fix EXPLAIN so it can show complex plans
- more accurately (Tom)
-
-
- References to subplan outputs are now always shown correctly,
- instead of using ?columnN?
- for complicated cases.
-
-
-
-
- Limit the amount of information reported when a user is dropped
- (Alvaro)
-
-
- Previously, dropping (or attempting to drop) a user who owned many
- objects could result in large NOTICE or
- ERROR messages listing all these objects; this
- caused problems for some client applications. The length of the
- message is now limited, although a full list is still sent to the
- server log.
-
-
-
-
-
-
-
-
-
Data Types
-
-
-
- Support for the SQL/XML standard, including new operators and an
- XML data type (Nikolay Samokhvalov, Pavel Stehule, Peter)
-
-
-
-
- Enumerated data types (ENUM ) (Tom Dunstan)
-
-
- This feature provides convenient support for fields that have a
- small, fixed set of allowed values. An example of creating an
- ENUM type is
- CREATE TYPE mood AS ENUM ('sad', 'ok', 'happy').
-
-
-
-
- Universally Unique Identifier (UUID) data type (Gevik
- Babakhani, Neil)
-
-
- This closely matches
RFC 4122. -
-
-
-
- Widen the MONEY data type to 64 bits (D'Arcy Cain)
-
-
- This greatly increases the range of supported MONEY
- values.
-
-
-
-
- Fix float4 /float8 to handle
- Infinity and NAN (Not A Number)
- consistently (Bruce)
-
-
- The code formerly was not consistent about distinguishing
- Infinity from overflow conditions.
-
-
-
-
- Allow leading and trailing whitespace during input of
- boolean values (Neil)
-
-
-
-
- Prevent COPY from using digits and lowercase letters as
- delimiters (Tom)
-
-
-
-
-
-
-
-
-
Functions
-
-
-
- Add new regular expression functions
- regexp_matches() ,
- regexp_split_to_array() , and
- regexp_split_to_table() (Jeremy Drake, Neil)
-
-
- These functions provide extraction of regular expression
- subexpressions and allow splitting a string using a POSIX regular
- expression.
-
-
-
-
- Add lo_truncate() for large object truncation
- (Kris Jurka)
-
-
-
-
- Implement width_bucket() for the float8
- data type (Neil)
-
-
-
-
- Add pg_stat_clear_snapshot() to discard
- statistics snapshots collected during the current transaction
- (Tom)
-
-
- The first request for statistics in a transaction takes a statistics
- snapshot that does not change during the transaction. This function
- allows the snapshot to be discarded and a new snapshot loaded during
- the next statistics query. This is particularly useful for PL/PgSQL
- functions, which are confined to a single transaction.
-
-
-
-
- Add isodow option to EXTRACT() and
- date_part() (Bruce)
-
-
- This returns the day of the week, with Sunday as seven.
- (dow returns Sunday as zero.)
-
-
-
-
- Add ID (ISO day of week) and IDDD (ISO
- day of year) format codes for to_char(),
- to_date(), and to_timestamp() (Brendan
- Jurd)
-
-
-
-
- Make to_timestamp() and to_date()
- assume TM (trim) option for potentially
- variable-width fields (Bruce)
-
-
- This matches
Oracle's behavior. -
-
-
-
- Fix off-by-one conversion error in
- to_date() /to_timestamp()
- D (non-ISO day of week) fields (Bruce)
-
-
-
-
- Make setseed() return void, rather than a
- useless integer value (Neil)
-
-
-
-
- Add a hash function for NUMERIC (Neil)
-
-
- This allows hash indexes and hash-based plans to be used with
- NUMERIC columns.
-
-
-
-
- Improve efficiency of
- LIKE /ILIKE , especially for
- multi-byte character sets like UTF-8 (Andrew, Itagaki Takahiro)
-
-
-
-
- Make currtid() functions require
- SELECT privileges on the target table (Tom)
-
-
-
-
- Add several txid_*() functions to query
- active transaction IDs (Jan)
-
-
- This is useful for various replication solutions.
-
-
-
-
-
-
-
-
-
PL/PgSQL Server-Side Language
-
-
-
- Add scrollable cursor support, including directional control in
- FETCH (Pavel Stehule)
-
-
-
-
- Allow IN as an alternative to
- FROM in PL/PgSQL's FETCH
- statement, for consistency with the backend's
- FETCH command (Pavel Stehule)
-
-
-
-
- Add MOVE to PL/PgSQL (Magnus, Pavel Stehule,
- Neil)
-
-
-
-
- Implement RETURN QUERY (Pavel Stehule, Neil)
-
-
- This adds convenient syntax for PL/PgSQL set-returning functions
- that want to return the result of a query. RETURN QUERY
- is easier and more efficient than a loop
- around RETURN NEXT .
-
-
-
-
- Allow function parameter names to be qualified with the
- function's name (Tom)
-
-
- For example, myfunc.myvar. This is particularly
- useful for specifying variables in a query where the variable
- name might match a column name.
-
-
-
-
- Make qualification of variables with block labels work properly (Tom)
-
-
- Formerly, outer-level block labels could unexpectedly interfere with
- recognition of inner-level record or row references.
-
-
-
-
- Tighten requirements for FOR loop
- STEP values (Tom)
-
-
- Prevent non-positive STEP values, and handle
- loop overflows.
-
-
-
-
- Improve accuracy when reporting syntax error locations (Tom)
-
-
-
-
-
-
-
-
-
Other Server-Side Languages
-
-
-
- Allow type-name arguments to PL/Perl
- spi_prepare() to be data type aliases in
- addition to names found in pg_type (Andrew)
-
-
-
-
- Allow type-name arguments to PL/Python
- plpy.prepare() to be data type aliases in
- addition to names found in pg_type (Andrew)
-
-
-
-
- Allow type-name arguments to PL/Tcl spi_prepare to
- be data type aliases in addition to names found in
- pg_type (Andrew)
-
-
-
-
- Enable PL/PythonU to compile on Python 2.5 (Marko Kreen)
-
-
-
-
- Support a true PL/Python boolean type in compatible Python versions
- (Python 2.3 and later) (Marko Kreen)
-
-
-
-
- Fix PL/Tcl problems with thread-enabled libtcl spawning
- multiple threads within the backend (Steve Marshall, Paul Bayer,
- Doug Knight)
-
-
- This caused all sorts of unpleasantness.
-
-
-
-
-
-
-
-
-
<link linkend="APP-PSQL"><application>psql</></link>
-
-
-
- List disabled triggers separately in \d output
- (Brendan Jurd)
-
-
-
-
- In \d patterns, always match $
- literally (Tom)
-
-
-
-
- Show aggregate return types in \da output
- (Greg Sabino Mullane)
-
-
-
-
- Add the function's volatility status to the output of
- \df+ (Neil)
-
-
-
-
- Add \prompt capability (Chad Wagner)
-
-
-
-
- Allow \pset , \t , and
- \x to specify on or off,
- rather than just toggling (Chad Wagner)
-
-
-
-
- Add \sleep capability (Jan)
-
-
-
-
- Enable \timing output for \copy (Andrew)
-
-
-
-
- Improve \timing resolution on Windows
- (Itagaki Takahiro)
-
-
-
-
- Flush \o output after each backslash command (Tom)
-
-
-
-
- Correctly detect and report errors while reading a -f
- input file (Peter)
-
-
-
-
- Remove -u option (this option has long been deprecated)
- (Tom)
-
-
-
-
-
-
-
-
-
<link linkend="APP-PGDUMP"><application>pg_dump</></link>
-
-
-
- Add --tablespaces-only and --roles-only
- options to
pg_dumpall (Dave Page)
-
-
-
-
- Add an output file option to
-
-
- This is primarily useful on Windows, where output redirection of
- child
pg_dump processes does not work.
-
-
-
-
- Allow
pg_dumpall to accept an initial-connection - database name rather than the default
- template1 (Dave Page)
-
-
-
-
- In -n and -t switches, always match
- $ literally (Tom)
-
-
-
-
- Improve performance when a database has thousands of objects (Tom)
-
-
-
-
- Remove -u option (this option has long been deprecated)
- (Tom)
-
-
-
-
-
-
-
-
-
Other Client Applications
-
-
-
- In
initdb, allow the location of the - pg_xlog directory to be specified
- (Euler Taveira de Oliveira)
-
-
-
-
- Enable server core dump generation in
pg_regress - on supported operating systems (Andrew)
-
-
-
-
- Add a
-t (timeout) parameter to pg_ctl - (Bruce)
-
-
- This controls how long
pg_ctl will wait when waiting - for server startup or shutdown. Formerly the timeout was hard-wired
- as 60 seconds.
-
-
-
-
- Add a
pg_ctl option to control generation - of server core dumps (Andrew)
-
-
-
-
- Allow Control-C to cancel
clusterdb, -
reindexdb, and vacuumdb (Itagaki - Takahiro, Magnus)
-
-
-
-
- Suppress command tag output for
createdb, -
createuser, dropdb, and -
-
- The --quiet option is ignored and will be removed in 8.4.
- Progress messages when acting on all databases now go to stdout
- instead of stderr because they are not actually errors.
-
-
-
-
-
-
-
-
-
<link linkend="libpq"><application>libpq</></link>
-
-
-
- Interpret the dbName parameter of
- PQsetdbLogin() as a conninfo string if
- it contains an equals sign (Andrew)
-
-
- This allows use of conninfo strings in client
- programs that still use PQsetdbLogin().
-
-
-
-
- Support a global
SSL configuration file (Victor - Wagner)
-
-
-
-
- Add environment variable PGSSLKEY to control
-
SSL hardware keys (Victor Wagner) -
-
-
-
- Add lo_truncate() for large object
- truncation (Kris Jurka)
-
-
-
-
- Add PQconnectionNeedsPassword() that returns
- true if the server required a password but none was supplied
- (Joe Conway, Tom)
-
-
- If this returns true after a failed connection attempt, a client
- application should prompt the user for a password. In the past
- applications have had to check for a specific error message string to
- decide whether a password is needed; that approach is now
- deprecated.
-
-
-
-
- Add PQconnectionUsedPassword() that returns
- true if the supplied password was actually used
- (Joe Conway, Tom)
-
-
- This is useful in some security contexts where it is important
- to know whether a user-supplied password is actually valid.
-
-
-
-
-
-
-
-
-
<link linkend="ecpg"><application>ecpg</></link>
-
-
-
- Use V3 frontend/backend protocol (Michael)
-
-
- This adds support for server-side prepared statements.
-
-
-
-
- Use native threads, instead of pthreads, on Windows (Magnus)
-
-
-
-
- Improve thread-safety of ecpglib (Itagaki Takahiro)
-
-
-
-
- Make the ecpg libraries export only necessary API symbols (Michael)
-
-
-
-
-
-
-
-
-
<application>Windows</> Port
-
-
-
- Allow the whole
PostgreSQL distribution to be compiled - with
Microsoft Visual C++ (Magnus and others) -
-
- This allows Windows-based developers to use familiar development
- and debugging tools.
- Windows executables made with Visual C++ might also have better
- stability and performance than those made with other tool sets.
- The client-only Visual C++ build scripts have been removed.
-
-
-
-
- Drastically reduce postmaster's memory usage when it has many child
- processes (Magnus)
-
-
-
-
- Allow regression tests to be started by an administrative
- user (Magnus)
-
-
-
-
- Add native shared memory implementation (Magnus)
-
-
-
-
-
-
-
-
-
Server Programming Interface (<acronym>SPI</>)
-
-
-
- Add cursor-related functionality in SPI (Pavel Stehule)
-
-
- Allow access to the cursor-related planning options, and add
- FETCH/MOVE routines.
-
-
-
-
- Allow execution of cursor commands through
- SPI_execute (Tom)
-
-
- The macro SPI_ERROR_CURSOR still exists but will
- never be returned.
-
-
-
-
- SPI plan pointers are now declared as SPIPlanPtr instead of
- void * (Tom)
-
-
- This does not break application code, but switching is
- recommended to help catch simple programming mistakes.
-
-
-
-
-
-
-
-
-
Build Options
-
-
-
- Add
configure option --enable-profiling - to enable code profiling (works only with
gcc) - (Korry Douglas and Nikhil Sontakke)
-
-
-
-
- Add
configure option --with-system-tzdata - to use the operating system's time zone database (Peter)
-
-
-
-
- Fix
PGXS so extensions can be built against PostgreSQL - installations whose
pg_config program does not - appear first in the PATH (Tom)
-
-
-
-
- Support gmake draft when building the
-
SGML documentation (Bruce) -
-
- Unless draft is used, the documentation build will
- now be repeated if necessary to ensure the index is up-to-date.
-
-
-
-
-
-
-
-
-
Source Code
-
-
-
- Rename macro DLLIMPORT to PGDLLIMPORT to
- avoid conflicting with third party includes (like Tcl) that
- define DLLIMPORT (Magnus)
-
-
-
-
- Create operator families
to improve planning of
- queries involving cross-data-type comparisons (Tom)
-
-
-
-
- Update GIN extractQuery() API to allow signalling
- that nothing can satisfy the query (Teodor)
-
-
-
-
- Move NAMEDATALEN definition from
- postgres_ext.h to pg_config_manual.h
- (Peter)
-
-
-
-
- Provide strlcpy() and
- strlcat() on all platforms, and replace
- error-prone uses of strncpy() ,
- strncat() , etc (Peter)
-
-
-
-
- Create hooks to let an external plugin monitor (or even replace) the
- planner and create plans for hypothetical situations (Gurjeet
- Singh, Tom)
-
-
-
-
- Create a function variable join_search_hook to let plugins
- override the join search order portion of the planner (Julius
- Stroffek)
-
-
-
-
- Add tas() support for Renesas' M32R processor
- (Kazuhiro Inaoka)
-
-
-
-
- quote_identifier() and
-
pg_dump no longer quote keywords that are
- unreserved according to the grammar (Tom)
-
-
-
-
- Change the on-disk representation of the NUMERIC
- data type so that the sign_dscale word comes
- before the weight (Tom)
-
-
-
-
- Use
SYSV semaphores rather than POSIX on Darwin - >= 6.0, i.e., OS X 10.2 and up (Chris Marcellino)
-
-
-
-
- Add
acronym and
- linkend="creating-cluster-nfs">NFS documentation
- sections (Bruce)
-
-
-
-
- "Postgres" is now documented as an accepted alias for
- "PostgreSQL" (Peter)
-
-
-
-
- Add documentation about preventing database server spoofing when
- the server is down (Bruce)
-
-
-
-
-
-
-
-
-
Contrib
-
-
-
- Move contrib README content into the
- main
PostgreSQL documentation (Albert Cervera i - Areny)
-
-
-
-
- Add contrib/pageinspect module for low-level
- page inspection (Simon, Heikki)
-
-
-
-
- Add contrib/pg_standby module for controlling
- warm standby operation (Simon)
-
-
-
-
- Add contrib/uuid-ossp module for generating
- UUID values using the OSSP UUID library (Peter)
-
-
- --with-ossp-uuid to activate. This takes
- advantage of the new UUID builtin type.
-
-
-
-
- Add contrib/dict_int ,
- contrib/dict_xsyn , and
- contrib/test_parser modules to provide
- sample add-on text search dictionary templates and parsers
- (Sergey Karpov)
-
-
-
-
- Allow
contrib/pgbench to set the fillfactor (Pavan - Deolasee)
-
-
-
-
- Add timestamps to
contrib/pgbench -l - (Greg Smith)
-
-
-
-
- Add usage count statistics to
- contrib/pgbuffercache (Greg Smith)
-
-
-
-
- Add GIN support for contrib/hstore (Teodor)
-
-
-
-
- Add GIN support for contrib/pg_trgm (Guillaume Smet, Teodor)
-
-
-
-
- Update OS/X startup scripts in
- contrib/start-scripts (Mark Cotner, David
- Fetter)
-
-
-
-
- Restrict pgrowlocks() and
- dblink_get_pkey() to users who have
- SELECT privilege on the target table (Tom)
-
-
-
-
- Restrict contrib/pgstattuple functions to
- superusers (Tom)
-
-
-
-
- contrib/xml2 is deprecated and planned for
- removal in 8.4 (Peter)
-
-
- The new XML support in core PostgreSQL supersedes this module.
-
-
-
-
-
-
-
-
-
-
-
Release 8.2.13
-
-
-
Release date
- 2009-03-16
-
-
- This release contains a variety of fixes from 8.2.12.
- For information about new features in the 8.2 major release, see
- .
-
-
-
-
Migration to Version 8.2.13
-
- A dump/restore is not required for those running 8.2.X.
- However, if you are upgrading from a version earlier than 8.2.11,
- see the release notes for 8.2.11.
-
-
-
-
-
-
Changes
-
-
-
-
- Prevent error recursion crashes when encoding conversion fails (Tom)
-
-
- This change extends fixes made in the last two minor releases for
- related failure scenarios. The previous fixes were narrowly tailored
- for the original problem reports, but we have now recognized that
- any error thrown by an encoding conversion function could
- potentially lead to infinite recursion while trying to report the
- error. The solution therefore is to disable translation and encoding
- conversion and report the plain-ASCII form of any error message,
- if we find we have gotten into a recursive error reporting situation.
- (CVE-2009-0922)
-
-
-
-
- Disallow CREATE CONVERSION with the wrong encodings
- for the specified conversion function (Heikki)
-
-
- This prevents one possible scenario for encoding conversion failure.
- The previous change is a backstop to guard against other kinds of
- failures in the same area.
-
-
-
-
- Fix core dump when to_char() is given format codes that
- are inappropriate for the type of the data argument (Tom)
-
-
-
-
- Fix possible failure in contrib/tsearch2 when C locale is
- used with a multi-byte encoding (Teodor)
-
-
- Crashes were possible on platforms where wchar_t is narrower
- than int; Windows in particular.
-
-
-
-
- Fix extreme inefficiency in contrib/tsearch2 parser's
- handling of an email-like string containing multiple @
- characters (Heikki)
-
-
-
-
- Fix decompilation of CASE WHEN with an implicit coercion
- (Tom)
-
-
- This mistake could lead to Assert failures in an Assert-enabled build,
- or an unexpected CASE WHEN clause error message in other
- cases, when trying to examine or dump a view.
-
-
-
-
- Fix possible misassignment of the owner of a TOAST table's rowtype (Tom)
-
-
- If CLUSTER or a rewriting variant of ALTER TABLE
- were executed by someone other than the table owner, the
- pg_type entry for the table's TOAST table would end up
- marked as owned by that someone. This caused no immediate problems,
- since the permissions on the TOAST rowtype aren't examined by any
- ordinary database operation. However, it could lead to unexpected
- failures if one later tried to drop the role that issued the command
- (in 8.1 or 8.2), or owner of data type appears to be invalid
- warnings from
pg_dump after having done so (in 8.3). -
-
-
-
- Fix PL/pgSQL to not treat INTO after INSERT as
- an INTO-variables clause anywhere in the string, not only at the start;
- in particular, don't fail for INSERT INTO within
- CREATE RULE (Tom)
-
-
-
-
- Clean up PL/pgSQL error status variables fully at block exit
- (Ashesh Vashi and Dave Page)
-
-
- This is not a problem for PL/pgSQL itself, but the omission could cause
- the PL/pgSQL Debugger to crash while examining the state of a function.
-
-
-
-
- Retry failed calls to CallNamedPipe() on Windows
- (Steve Marshall, Magnus)
-
-
- It appears that this function can sometimes fail transiently;
- we previously treated any failure as a hard error, which could
- confuse LISTEN/NOTIFY as well as other
- operations.
-
-
-
-
- Add MUST (Mauritius Island Summer Time) to the default list
- of known timezone abbreviations (Xavier Bugaud)
-
-
-
-
-
-
-
-
-
-
Release 8.2.12
-
-
-
Release date
- 2009-02-02
-
-
- This release contains a variety of fixes from 8.2.11.
- For information about new features in the 8.2 major release, see
- .
-
-
-
-
Migration to Version 8.2.12
-
- A dump/restore is not required for those running 8.2.X.
- However, if you are upgrading from a version earlier than 8.2.11,
- see the release notes for 8.2.11.
-
-
-
-
-
-
Changes
-
-
-
-
- Improve handling of URLs in headline() function (Teodor)
-
-
-
-
- Improve handling of overlength headlines in headline()
- function (Teodor)
-
-
-
-
- Prevent possible Assert failure or misconversion if an encoding
- conversion is created with the wrong conversion function for the
- specified pair of encodings (Tom, Heikki)
-
-
-
-
- Fix possible Assert failure if a statement executed in PL/pgSQL is
- rewritten into another kind of statement, for example if an
- INSERT is rewritten into an UPDATE (Heikki)
-
-
-
-
- Ensure that a snapshot is available to datatype input functions (Tom)
-
-
- This primarily affects domains that are declared with CHECK
- constraints involving user-defined stable or immutable functions. Such
- functions typically fail if no snapshot has been set.
-
-
-
-
- Make it safer for SPI-using functions to be used within datatype I/O;
- in particular, to be used in domain check constraints (Tom)
-
-
-
-
- Avoid unnecessary locking of small tables in VACUUM
- (Heikki)
-
-
-
-
- Fix a problem that made UPDATE RETURNING tableoid
- return zero instead of the correct OID (Tom)
-
-
-
-
- Fix planner misestimation of selectivity when transitive equality
- is applied to an outer-join clause (Tom)
-
-
- This could result in bad plans for queries like
- ... from a left join b on a.a1 = b.b1 where a.a1 = 42 ...
-
-
-
-
- Improve optimizer's handling of long IN lists (Tom)
-
-
- This change avoids wasting large amounts of time on such lists
- when constraint exclusion is enabled.
-
-
-
-
- Ensure that the contents of a holdable cursor don't depend on the
- contents of TOAST tables (Tom)
-
-
- Previously, large field values in a cursor result might be represented
- as TOAST pointers, which would fail if the referenced table got dropped
- before the cursor is read, or if the large value is deleted and then
- vacuumed away. This cannot happen with an ordinary cursor,
- but it could with a cursor that is held past its creating transaction.
-
-
-
-
- Fix memory leak when a set-returning function is terminated without
- reading its whole result (Tom)
-
-
-
-
- Fix contrib/dblink's
- dblink_get_result(text,bool) function (Joe)
-
-
-
-
- Fix possible garbage output from contrib/sslinfo functions
- (Tom)
-
-
-
-
- Fix
configure script to properly report failure when - unable to obtain linkage information for PL/Perl (Andrew)
-
-
-
-
- Make all documentation reference pgsql-bugs and/or
- pgsql-hackers as appropriate, instead of the
- now-decommissioned pgsql-ports and pgsql-patches
- mailing lists (Tom)
-
-
-
-
- Update time zone data files to
tzdata release 2009a (for - Kathmandu and historical DST corrections in Switzerland, Cuba)
-
-
-
-
-
-
-
-
-
-
Release 8.2.11
-
-
-
Release date
- 2008-11-03
-
-
- This release contains a variety of fixes from 8.2.10.
- For information about new features in the 8.2 major release, see
- .
-
-
-
-
Migration to Version 8.2.11
-
- A dump/restore is not required for those running 8.2.X.
- However, if you are upgrading from a version earlier than 8.2.7,
- see the release notes for 8.2.7. Also, if you were running a previous
- 8.2.X release, it is recommended to REINDEX all GiST
- indexes after the upgrade.
-
-
-
-
-
-
Changes
-
-
-
-
- Fix GiST index corruption due to marking the wrong index entry
- dead after a deletion (Teodor)
-
-
- This would result in index searches failing to find rows they
- should have found. Corrupted indexes can be fixed with
- REINDEX.
-
-
-
-
- Fix backend crash when the client encoding cannot represent a localized
- error message (Tom)
-
-
- We have addressed similar issues before, but it would still fail if
- the character has no equivalent message itself couldn't
- be converted. The fix is to disable localization and send the plain
- ASCII error message when we detect such a situation.
-
-
-
-
- Fix possible crash when deeply nested functions are invoked from
- a trigger (Tom)
-
-
-
-
- Improve optimization of expression IN
- (expression-list) queries (Tom, per an idea from Robert
- Haas)
-
-
- Cases in which there are query variables on the right-hand side had been
- handled less efficiently in 8.2.x and 8.3.x than in prior versions.
- The fix restores 8.1 behavior for such cases.
-
-
-
-
- Fix mis-expansion of rule queries when a sub-SELECT appears
- in a function call in FROM, a multi-row VALUES
- list, or a RETURNING list (Tom)
-
-
- The usual symptom of this problem is an unrecognized node type
- error.
-
-
-
-
- Fix memory leak during rescan of a hashed aggregation plan (Neil)
-
-
-
-
- Ensure an error is reported when a newly-defined PL/pgSQL trigger
- function is invoked as a normal function (Tom)
-
-
-
-
- Prevent possible collision of relfilenode numbers
- when moving a table to another tablespace with ALTER SET
- TABLESPACE (Heikki)
-
-
- The command tried to re-use the existing filename, instead of
- picking one that is known unused in the destination directory.
-
-
-
-
- Fix incorrect tsearch2 headline generation when single query
- item matches first word of text (Sushant Sinha)
-
-
-
-
- Fix improper display of fractional seconds in interval values when
- using a non-ISO datestyle in an --enable-integer-datetimes
- build (Ron Mayer)
-
-
-
-
- Ensure SPI_getvalue and SPI_getbinval
- behave correctly when the passed tuple and tuple descriptor have
- different numbers of columns (Tom)
-
-
- This situation is normal when a table has had columns added or removed,
- but these two functions didn't handle it properly.
- The only likely consequence is an incorrect error indication.
-
-
-
-
- Fix
ecpg's parsing of CREATE ROLE (Michael) -
-
-
-
- Fix recent breakage of pg_ctl restart (Tom)
-
-
-
-
- Ensure pg_control is opened in binary mode
- (Itagaki Takahiro)
-
-
-
pg_controldata and pg_resetxlog - did this incorrectly, and so could fail on Windows.
-
-
-
-
- Update time zone data files to
tzdata release 2008i (for - DST law changes in Argentina, Brazil, Mauritius, Syria)
-
-
-
-
-
-
-
-
-
-
Release 8.2.10
-
-
-
Release date
- 2008-09-22
-
-
- This release contains a variety of fixes from 8.2.9.
- For information about new features in the 8.2 major release, see
- .
-
-
-
-
Migration to Version 8.2.10
-
- A dump/restore is not required for those running 8.2.X.
- However, if you are upgrading from a version earlier than 8.2.7,
- see the release notes for 8.2.7.
-
-
-
-
-
-
Changes
-
-
-
-
- Fix bug in btree WAL recovery code (Heikki)
-
-
- Recovery failed if the WAL ended partway through a page split operation.
-
-
-
-
- Fix potential miscalculation of datfrozenxid (Alvaro)
-
-
- This error may explain some recent reports of failure to remove old
- pg_clog data.
-
-
-
-
- Widen local lock counters from 32 to 64 bits (Tom)
-
-
- This responds to reports that the counters could overflow in
- sufficiently long transactions, leading to unexpected lock is
- already held errors.
-
-
-
-
- Fix possible duplicate output of tuples during a GiST index scan (Teodor)
-
-
-
-
- Fix missed permissions checks when a view contains a simple
- UNION ALL construct (Heikki)
-
-
- Permissions for the referenced tables were checked properly, but not
- permissions for the view itself.
-
-
-
-
- Add checks in executor startup to ensure that the tuples produced by an
- INSERT or UPDATE will match the target table's
- current rowtype (Tom)
-
-
- ALTER COLUMN TYPE, followed by re-use of a previously
- cached plan, could produce this type of situation. The check protects
- against data corruption and/or crashes that could ensue.
-
-
-
-
- Fix possible repeated drops during DROP OWNED (Tom)
-
-
- This would typically result in strange errors such as cache
- lookup failed for relation NNN.
-
-
-
-
- Fix AT TIME ZONE to first try to interpret its timezone
- argument as a timezone abbreviation, and only try it as a full timezone
- name if that fails, rather than the other way around as formerly (Tom)
-
-
- The timestamp input functions have always resolved ambiguous zone names
- in this order. Making AT TIME ZONE do so as well improves
- consistency, and fixes a compatibility bug introduced in 8.1:
- in ambiguous cases we now behave the same as 8.0 and before did,
- since in the older versions AT TIME ZONE accepted
- only abbreviations.
-
-
-
-
- Fix datetime input functions to correctly detect integer overflow when
- running on a 64-bit platform (Tom)
-
-
-
-
- Prevent integer overflows during units conversion when displaying a
- configuration parameter that has units (Tom)
-
-
-
-
- Improve performance of writing very long log messages to syslog (Tom)
-
-
-
-
- Allow spaces in the suffix part of an LDAP URL in
- pg_hba.conf (Tom)
-
-
-
-
- Fix bug in backwards scanning of a cursor on a SELECT DISTINCT
- ON query (Tom)
-
-
-
-
- Fix planner bug with nested sub-select expressions (Tom)
-
-
- If the outer sub-select has no direct dependency on the parent query,
- but the inner one does, the outer value might not get recalculated
- for new parent query rows.
-
-
-
-
- Fix planner to estimate that GROUP BY expressions yielding
- boolean results always result in two groups, regardless of the
- expressions' contents (Tom)
-
-
- This is very substantially more accurate than the regular GROUP
- BY estimate for certain boolean tests like col
- IS NULL.
-
-
-
-
- Fix PL/PgSQL to not fail when a FOR loop's target variable
- is a record containing composite-type fields (Tom)
-
-
-
-
- Fix PL/Tcl to behave correctly with Tcl 8.5, and to be more careful
- about the encoding of data sent to or from Tcl (Tom)
-
-
-
-
- On Windows, work around a Microsoft bug by preventing
-
libpq from trying to send more than 64kB per system call - (Magnus)
-
-
-
-
- Improve
pg_dump and pg_restore's - error reporting after failure to send a SQL command (Tom)
-
-
-
-
- Fix
pg_ctl to properly preserve postmaster - command-line arguments across a restart (Bruce)
-
-
-
-
- Update time zone data files to
tzdata release 2008f (for - DST law changes in Argentina, Bahamas, Brazil, Mauritius, Morocco,
- Pakistan, Palestine, and Paraguay)
-
-
-
-
-
-
-
-
-
-
Release 8.2.9
-
-
-
Release date
- 2008-06-12
-
-
- This release contains one serious and one minor bug fix over 8.2.8.
- For information about new features in the 8.2 major release, see
- .
-
-
-
-
Migration to Version 8.2.9
-
- A dump/restore is not required for those running 8.2.X.
- However, if you are upgrading from a version earlier than 8.2.7,
- see the release notes for 8.2.7.
-
-
-
-
-
-
Changes
-
-
-
-
- Make pg_get_ruledef() parenthesize negative constants (Tom)
-
-
- Before this fix, a negative constant in a view or rule might be dumped
- as, say, -42::integer, which is subtly incorrect: it should
- be (-42)::integer due to operator precedence rules.
- Usually this would make little difference, but it could interact with
- another recent patch to cause
-
PostgreSQL to reject what had been a valid - SELECT DISTINCT view query. Since this could result in
-
pg_dump output failing to reload, it is being treated - as a high-priority fix. The only released versions in which dump
- output is actually incorrect are 8.3.1 and 8.2.7.
-
-
-
-
- Make ALTER AGGREGATE ... OWNER TO update
- pg_shdepend (Tom)
-
-
- This oversight could lead to problems if the aggregate was later
- involved in a DROP OWNED or REASSIGN OWNED
- operation.
-
-
-
-
-
-
-
-
-
-
Release 8.2.8
-
-
-
Release date
- never released
-
-
- This release contains a variety of fixes from 8.2.7.
- For information about new features in the 8.2 major release, see
- .
-
-
-
-
Migration to Version 8.2.8
-
- A dump/restore is not required for those running 8.2.X.
- However, if you are upgrading from a version earlier than 8.2.7,
- see the release notes for 8.2.7.
-
-
-
-
-
-
Changes
-
-
-
-
- Fix ERRORDATA_STACK_SIZE exceeded crash that
- occurred on Windows when using UTF-8 database encoding and a different
- client encoding (Tom)
-
-
-
-
- Fix ALTER TABLE ADD COLUMN ... PRIMARY KEY so that the new
- column is correctly checked to see if it's been initialized to all
- non-nulls (Brendan Jurd)
-
-
- Previous versions neglected to check this requirement at all.
-
-
-
-
- Fix possible CREATE TABLE failure when inheriting the
- same constraint from multiple parent relations that
- inherited that constraint from a common ancestor (Tom)
-
-
-
-
- Fix pg_get_ruledef() to show the alias, if any, attached
- to the target table of an UPDATE or DELETE
- (Tom)
-
-
-
-
- Fix GIN bug that could result in a too many LWLocks
- taken failure (Teodor)
-
-
-
-
- Avoid possible crash when decompressing corrupted data
- (Zdenek Kotala)
-
-
-
-
- Repair two places where SIGTERM exit of a backend could leave corrupted
- state in shared memory (Tom)
-
-
- Neither case is very important if SIGTERM is used to shut down the
- whole database cluster together, but there was a problem if someone
- tried to SIGTERM individual backends.
-
-
-
-
- Fix conversions between ISO-8859-5 and other encodings to handle
- Cyrillic Yo characters (e and E with
- two dots) (Sergey Burladyan)
-
-
-
-
- Fix several datatype input functions, notably array_in(),
- that were allowing unused bytes in their results to contain
- uninitialized, unpredictable values (Tom)
-
-
- This could lead to failures in which two apparently identical literal
- values were not seen as equal, resulting in the parser complaining
- about unmatched ORDER BY and DISTINCT
- expressions.
-
-
-
-
- Fix a corner case in regular-expression substring matching
- (substring(string from
- pattern)) (Tom)
-
-
- The problem occurs when there is a match to the pattern overall but
- the user has specified a parenthesized subexpression and that
- subexpression hasn't got a match. An example is
- substring('foo' from 'foo(bar)?').
- This should return NULL, since (bar) isn't matched, but
- it was mistakenly returning the whole-pattern match instead (ie,
- foo).
-
-
-
-
- Update time zone data files to
tzdata release 2008c (for - DST law changes in Morocco, Iraq, Choibalsan, Pakistan, Syria, Cuba, and
- Argentina/San_Luis)
-
-
-
-
- Fix incorrect result from
ecpg's - PGTYPEStimestamp_sub() function (Michael)
-
-
-
-
- Fix broken GiST comparison function for contrib/tsearch2's
- tsquery type (Teodor)
-
-
-
-
- Fix possible crashes in contrib/cube functions (Tom)
-
-
-
-
- Fix core dump in contrib/xml2's
- xpath_table() function when the input query returns a
- NULL value (Tom)
-
-
-
-
- Fix contrib/xml2's makefile to not override
- CFLAGS (Tom)
-
-
-
-
- Fix
DatumGetBool macro to not fail with gcc - 4.3 (Tom)
-
-
- This problem affects old style (V0) C functions that
- return boolean. The fix is already in 8.3, but the need to
- back-patch it was not realized at the time.
-
-
-
-
-
-
-
-
-
-
Release 8.2.7
-
-
-
Release date
- 2008-03-17
-
-
- This release contains a variety of fixes from 8.2.6.
- For information about new features in the 8.2 major release, see
- .
-
-
-
-
Migration to Version 8.2.7
-
- A dump/restore is not required for those running 8.2.X.
- However, you might need to REINDEX indexes on textual
- columns after updating, if you are affected by the Windows locale
- issue described below.
-
-
-
-
-
-
Changes
-
-
-
-
- Fix character string comparison for Windows locales that consider
- different character combinations as equal (Tom)
-
-
- This fix applies only on Windows and only when using UTF-8
- database encoding. The same fix was made for all other cases
- over two years ago, but Windows with UTF-8 uses a separate code
- path that was not updated. If you are using a locale that
- considers some non-identical strings as equal, you may need to
- REINDEX to fix existing indexes on textual columns.
-
-
-
-
- Repair potential deadlock between concurrent VACUUM FULL
- operations on different system catalogs (Tom)
-
-
-
-
- Fix longstanding LISTEN/NOTIFY
- race condition (Tom)
-
-
- In rare cases a session that had just executed a
- LISTEN might not get a notification, even though
- one would be expected because the concurrent transaction executing
- NOTIFY was observed to commit later.
-
-
- A side effect of the fix is that a transaction that has executed
- a not-yet-committed LISTEN command will not see any
- row in pg_listener for the LISTEN,
- should it choose to look; formerly it would have. This behavior
- was never documented one way or the other, but it is possible that
- some applications depend on the old behavior.
-
-
-
-
- Disallow LISTEN and UNLISTEN within a
- prepared transaction (Tom)
-
-
- This was formerly allowed but trying to do it had various unpleasant
- consequences, notably that the originating backend could not exit
- as long as an UNLISTEN remained uncommitted.
-
-
-
-
- Disallow dropping a temporary table within a
- prepared transaction (Heikki)
-
-
- This was correctly disallowed by 8.1, but the check was inadvertently
- broken in 8.2.
-
-
-
-
- Fix rare crash when an error occurs during a query using a hash index
- (Heikki)
-
-
-
-
- Fix memory leaks in certain usages of set-returning functions (Neil)
-
-
-
-
- Fix input of datetime values for February 29 in years BC (Tom)
-
-
- The former coding was mistaken about which years were leap years.
-
-
-
-
- Fix unrecognized node type error in some variants of
- ALTER OWNER (Tom)
-
-
-
-
- Ensure pg_stat_activity.waiting flag
- is cleared when a lock wait is aborted (Tom)
-
-
-
-
- Fix handling of process permissions on Windows Vista (Dave, Magnus)
-
-
- In particular, this fix allows starting the server as the Administrator
- user.
-
-
-
-
- Update time zone data files to
tzdata release 2008a - (in particular, recent Chile changes); adjust timezone abbreviation
- VET (Venezuela) to mean UTC-4:30, not UTC-4:00 (Tom)
-
-
-
-
- Fix
pg_ctl to correctly extract the postmaster's port - number from command-line options (Itagaki Takahiro, Tom)
-
-
- Previously, pg_ctl start -w could try to contact the
- postmaster on the wrong port, leading to bogus reports of startup
- failure.
-
-
-
-
- Use -fwrapv to defend against possible misoptimization
- in recent
gcc versions (Tom) -
-
- This is known to be necessary when building
PostgreSQL -
-
-
-
-
- Correctly enforce statement_timeout values longer
- than INT_MAX microseconds (about 35 minutes) (Tom)
-
-
- This bug affects only builds with --enable-integer-datetimes.
-
-
-
-
- Fix unexpected PARAM_SUBLINK ID planner error when
- constant-folding simplifies a sub-select (Tom)
-
-
-
-
- Fix logical errors in constraint-exclusion handling of IS
- NULL and NOT expressions (Tom)
-
-
- The planner would sometimes exclude partitions that should not
- have been excluded because of the possibility of NULL results.
-
-
-
-
- Fix another cause of failed to build any N-way joins
- planner errors (Tom)
-
-
- This could happen in cases where a clauseless join needed to be
- forced before a join clause could be exploited.
-
-
-
-
- Fix incorrect constant propagation in outer-join planning (Tom)
-
-
- The planner could sometimes incorrectly conclude that a variable
- could be constrained to be equal to a constant, leading
- to wrong query results.
-
-
-
-
- Fix display of constant expressions in ORDER BY
- and GROUP BY (Tom)
-
-
- An explictly casted constant would be shown incorrectly. This could
- for example lead to corruption of a view definition during
- dump and reload.
-
-
-
-
- Fix
libpq to handle NOTICE messages correctly - during COPY OUT (Tom)
-
-
- This failure has only been observed to occur when a user-defined
- datatype's output routine issues a NOTICE, but there is no
- guarantee it couldn't happen due to other causes.
-
-
-
-
-
-
-
-
-
-
Release 8.2.6
-
-
-
Release date
- 2008-01-07
-
-
- This release contains a variety of fixes from 8.2.5,
- including fixes for significant security issues.
- For information about new features in the 8.2 major release, see
- .
-
-
-
-
Migration to Version 8.2.6
-
- A dump/restore is not required for those running 8.2.X.
-
-
-
-
-
-
Changes
-
-
-
-
- Prevent functions in indexes from executing with the privileges of
- the user running VACUUM, ANALYZE, etc (Tom)
-
-
- Functions used in index expressions and partial-index
- predicates are evaluated whenever a new table entry is made. It has
- long been understood that this poses a risk of trojan-horse code
- execution if one modifies a table owned by an untrustworthy user.
- (Note that triggers, defaults, check constraints, etc. pose the
- same type of risk.) But functions in indexes pose extra danger
- because they will be executed by routine maintenance operations
- such as VACUUM FULL, which are commonly performed
- automatically under a superuser account. For example, a nefarious user
- can execute code with superuser privileges by setting up a
- trojan-horse index definition and waiting for the next routine vacuum.
- The fix arranges for standard maintenance operations
- (including VACUUM, ANALYZE, REINDEX,
- and CLUSTER) to execute as the table owner rather than
- the calling user, using the same privilege-switching mechanism already
- used for SECURITY DEFINER functions. To prevent bypassing
- this security measure, execution of SET SESSION
- AUTHORIZATION and SET ROLE is now forbidden within a
- SECURITY DEFINER context. (CVE-2007-6600)
-
-
-
-
- Repair assorted bugs in the regular-expression package (Tom, Will Drewry)
-
-
- Suitably crafted regular-expression patterns could cause crashes,
- infinite or near-infinite looping, and/or massive memory consumption,
- all of which pose denial-of-service hazards for applications that
- accept regex search patterns from untrustworthy sources.
- (CVE-2007-4769, CVE-2007-4772, CVE-2007-6067)
-
-
-
-
- Require non-superusers who use /contrib/dblink to use only
- password authentication, as a security measure (Joe)
-
-
- The fix that appeared for this in 8.2.5 was incomplete, as it plugged
- the hole for only some dblink functions. (CVE-2007-6601,
- CVE-2007-3278)
-
-
-
-
- Fix bugs in WAL replay for GIN indexes (Teodor)
-
-
-
-
- Fix GIN index build to work properly when
- maintenance_work_mem is 4GB or more (Tom)
-
-
-
-
- Update time zone data files to
tzdata release 2007k - (in particular, recent Argentina changes) (Tom)
-
-
-
-
- Improve planner's handling of LIKE/regex estimation in non-C locales
- (Tom)
-
-
-
-
- Fix planning-speed problem for deep outer-join nests, as well as
- possible poor choice of join order (Tom)
-
-
-
-
- Fix planner failure in some cases of WHERE false AND var IN
- (SELECT ...) (Tom)
-
-
-
-
- Make CREATE TABLE ... SERIAL and
- ALTER SEQUENCE ... OWNED BY not change the
- currval() state of the sequence (Tom)
-
-
-
-
- Preserve the tablespace and storage parameters of indexes that are
- rebuilt by ALTER TABLE ... ALTER COLUMN TYPE (Tom)
-
-
-
-
- Make archive recovery always start a new WAL timeline, rather than only
- when a recovery stop time was used (Simon)
-
-
- This avoids a corner-case risk of trying to overwrite an existing
- archived copy of the last WAL segment, and seems simpler and cleaner
- than the original definition.
-
-
-
-
- Make VACUUM not use all of maintenance_work_mem
- when the table is too small for it to be useful (Alvaro)
-
-
-
-
- Fix potential crash in translate() when using a multibyte
- database encoding (Tom)
-
-
-
-
- Make corr() return the correct result for negative
- correlation values (Neil)
-
-
-
-
- Fix overflow in extract(epoch from interval) for intervals
- exceeding 68 years (Tom)
-
-
-
-
- Fix PL/Perl to not fail when a UTF-8 regular expression is used
- in a trusted function (Andrew)
-
-
-
-
- Fix PL/Perl to cope when platform's Perl defines type bool
- as int rather than char (Tom)
-
-
- While this could theoretically happen anywhere, no standard build of
- Perl did things this way ... until
Mac OS X 10.5. -
-
-
-
- Fix PL/Python to work correctly with Python 2.5 on 64-bit machines
- (Marko Kreen)
-
-
-
-
- Fix PL/Python to not crash on long exception messages (Alvaro)
-
-
-
-
- Fix
pg_dump to correctly handle inheritance child tables - that have default expressions different from their parent's (Tom)
-
-
-
-
- Fix
libpq crash when PGPASSFILE refers - to a file that is not a plain file (Martin Pitt)
-
-
-
-
-
ecpg parser fixes (Michael) -
-
-
-
- Make contrib/pgcrypto defend against
-
OpenSSL libraries that fail on keys longer than 128 - bits; which is the case at least on some Solaris versions (Marko Kreen)
-
-
-
-
- Make contrib/tablefunc's crosstab() handle
- NULL rowid as a category in its own right, rather than crashing (Joe)
-
-
-
-
- Fix tsvector and tsquery output routines to
- escape backslashes correctly (Teodor, Bruce)
-
-
-
-
- Fix crash of to_tsvector() on huge input strings (Teodor)
-
-
-
-
- Require a specific version of
Autoconf to be used - when re-generating the configure script (Peter)
-
-
- This affects developers and packagers only. The change was made
- to prevent accidental use of untested combinations of
-
Autoconf and PostgreSQL versions. - You can remove the version check if you really want to use a
- different
Autoconf version, but it's - your responsibility whether the result works or not.
-
-
-
-
- Update gettimeofday configuration check so that
-
PostgreSQL can be built on newer versions of -
-
-
-
-
-
-
-
-
-
Release 8.2.5
-
-
-
Release date
- 2007-09-17
-
-
- This release contains a variety of fixes from 8.2.4.
- For information about new features in the 8.2 major release, see
- .
-
-
-
-
Migration to Version 8.2.5
-
- A dump/restore is not required for those running 8.2.X.
-
-
-
-
-
-
Changes
-
-
-
-
- Prevent index corruption when a transaction inserts rows and
- then aborts close to the end of a concurrent VACUUM
- on the same table (Tom)
-
-
-
-
- Fix ALTER DOMAIN ADD CONSTRAINT for cases involving
- domains over domains (Tom)
-
-
-
-
- Make CREATE DOMAIN ... DEFAULT NULL work properly (Tom)
-
-
-
-
- Fix some planner problems with outer joins, notably poor
- size estimation for t1 LEFT JOIN t2 WHERE t2.col IS NULL
- (Tom)
-
-
-
-
- Allow the interval data type to accept input consisting only of
- milliseconds or microseconds (Neil)
-
-
-
-
- Allow timezone name to appear before the year in timestamp input (Tom)
-
-
-
-
- Fixes for
GIN indexes used by /contrib/tsearch2 (Teodor) -
-
-
-
- Speed up rtree index insertion (Teodor)
-
-
-
-
- Fix excessive logging of
SSL error messages (Tom) -
-
-
-
- Fix logging so that log messages are never interleaved when using
- the syslogger process (Andrew)
-
-
-
-
- Fix crash when log_min_error_statement logging runs out
- of memory (Tom)
-
-
-
-
- Fix incorrect handling of some foreign-key corner cases (Tom)
-
-
-
-
- Fix stddev_pop(numeric) and var_pop(numeric) (Tom)
-
-
-
-
- Prevent REINDEX and CLUSTER from failing
- due to attempting to process temporary tables of other sessions (Alvaro)
-
-
-
-
- Update the time zone database rules, particularly New Zealand's upcoming changes (Tom)
-
-
-
-
- Windows socket and semaphore improvements (Magnus)
-
-
-
-
- Make pg_ctl -w work properly in Windows service mode (Dave Page)
-
-
-
-
- Fix memory allocation bug when using
MIT Kerberos on Windows (Magnus) -
-
-
-
- Suppress timezone name (%Z) in log timestamps on Windows
- because of possible encoding mismatches (Tom)
-
-
-
-
- Require non-superusers who use /contrib/dblink to use only
- password authentication, as a security measure (Joe)
-
-
-
-
- Restrict /contrib/pgstattuple functions to superusers, for security reasons (Tom)
-
-
-
-
- Do not let /contrib/intarray try to make its GIN opclass
- the default (this caused problems at dump/restore) (Tom)
-
-
-
-
-
-
-
-
-
-
Release 8.2.4
-
-
-
Release date
- 2007-04-23
-
-
- This release contains a variety of fixes from 8.2.3,
- including a security fix.
- For information about new features in the 8.2 major release, see
- .
-
-
-
-
Migration to Version 8.2.4
-
- A dump/restore is not required for those running 8.2.X.
-
-
-
-
-
-
Changes
-
-
-
-
- Support explicit placement of the temporary-table schema within
- search_path, and disable searching it for functions
- and operators (Tom)
-
-
- This is needed to allow a security-definer function to set a
- truly secure value of search_path. Without it,
- an unprivileged SQL user can use temporary objects to execute code
- with the privileges of the security-definer function (CVE-2007-2138).
- See CREATE FUNCTION for more information.
-
-
-
-
- Fix shared_preload_libraries for Windows
- by forcing reload in each backend (Korry Douglas)
-
-
-
-
- Fix to_char() so it properly upper/lower cases localized day or month
- names (Pavel Stehule)
-
-
-
-
- /contrib/tsearch2 crash fixes (Teodor)
-
-
-
-
- Require COMMIT PREPARED to be executed in the same
- database as the transaction was prepared in (Heikki)
-
-
-
-
- Allow pg_dump to do binary backups larger than two gigabytes
- on Windows (Magnus)
-
-
-
-
- New traditional (Taiwan) Chinese
FAQ (Zhou Daojing) -
-
-
-
- Prevent the statistics collector from writing to disk too frequently (Tom)
-
-
-
-
- Fix potential-data-corruption bug in how VACUUM FULL handles
- UPDATE chains (Tom, Pavan Deolasee)
-
-
-
-
- Fix bug in domains that use array types (Tom)
-
-
-
-
- Fix pg_dump so it can dump a serial column's sequence
- using -t when not also dumping the owning table
- (Tom)
-
-
-
-
- Planner fixes, including improving outer join and bitmap scan
- selection logic (Tom)
-
-
-
-
- Fix possible wrong answers or crash when a PL/pgSQL function tries
- to RETURN from within an EXCEPTION block
- (Tom)
-
-
-
-
- Fix PANIC during enlargement of a hash index (Tom)
-
-
-
-
- Fix POSIX-style timezone specs to follow new USA DST rules (Tom)
-
-
-
-
-
-
-
-
-
-
Release 8.2.3
-
-
-
Release date
- 2007-02-07
-
-
- This release contains two fixes from 8.2.2.
- For information about new features in the 8.2 major release, see
- .
-
-
-
-
Migration to Version 8.2.3
-
- A dump/restore is not required for those running 8.2.X.
-
-
-
-
-
-
Changes
-
-
-
-
- Remove overly-restrictive check for type length in constraints and
- functional indexes(Tom)
-
-
-
-
- Fix optimization so MIN/MAX in subqueries can again use indexes (Tom)
-
-
-
-
-
-
-
-
-
-
Release 8.2.2
-
-
-
Release date
- 2007-02-05
-
-
- This release contains a variety of fixes from 8.2.1, including
- a security fix.
- For information about new features in the 8.2 major release, see
- .
-
-
-
-
Migration to Version 8.2.2
-
- A dump/restore is not required for those running 8.2.X.
-
-
-
-
-
-
Changes
-
-
-
-
- Remove security vulnerabilities that allowed connected users
- to read backend memory (Tom)
-
-
- The vulnerabilities involve suppressing the normal check that a SQL
- function returns the data type it's declared to, and changing the
- data type of a table column (CVE-2007-0555, CVE-2007-0556). These
- errors can easily be exploited to cause a backend crash, and in
- principle might be used to read database content that the user
- should not be able to access.
-
-
-
-
- Fix not-so-rare-anymore bug wherein btree index page splits could fail
- due to choosing an infeasible split point (Heikki Linnakangas)
-
-
-
-
- Fix Borland C compile scripts (L Bayuk)
-
-
-
-
- Properly handle to_char('CC') for years ending in
- 00 (Tom)
-
-
- Year 2000 is in the twentieth century, not the twenty-first.
-
-
-
-
- /contrib/tsearch2 localization improvements (Tatsuo, Teodor)
-
-
-
-
- Fix incorrect permission check in
- information_schema.key_column_usage view (Tom)
-
-
- The symptom is relation with OID nnnnn does not exist errors.
- To get this fix without using initdb, use CREATE OR
- REPLACE VIEW to install the corrected definition found in
- share/information_schema.sql. Note you will need to do
- this in each database.
-
-
-
-
- Improve VACUUM performance for databases with many tables (Tom)
-
-
-
-
- Fix for rare Assert() crash triggered by UNION (Tom)
-
-
-
-
- Fix potentially incorrect results from index searches using
- ROW inequality conditions (Tom)
-
-
-
-
- Tighten security of multi-byte character processing for UTF8 sequences
- over three bytes long (Tom)
-
-
-
-
- Fix bogus permission denied failures occurring on Windows
- due to attempts to fsync already-deleted files (Magnus, Tom)
-
-
-
-
- Fix bug that could cause the statistics collector
- to hang on Windows (Magnus)
-
-
- This would in turn lead to autovacuum not working.
-
-
-
-
- Fix possible crashes when an already-in-use PL/pgSQL function is
- updated (Tom)
-
-
-
-
- Improve PL/pgSQL handling of domain types (Sergiy Vyshnevetskiy, Tom)
-
-
-
-
- Fix possible errors in processing PL/pgSQL exception blocks (Tom)
-
-
-
-
-
-
-
-
-
-
Release 8.2.1
-
-
-
Release date
- 2007-01-08
-
-
- This release contains a variety of fixes from 8.2.
- For information about new features in the 8.2 major release, see
- .
-
-
-
-
Migration to Version 8.2.1
-
- A dump/restore is not required for those running 8.2.
-
-
-
-
-
-
Changes
-
-
-
-
- Fix crash with SELECT ... LIMIT ALL (also
- LIMIT NULL) (Tom)
-
-
-
-
- Several /contrib/tsearch2 fixes (Teodor)
-
-
-
-
- On Windows, make log messages coming from the operating system use
-
ASCII encoding (Hiroshi Saito) -
-
- This fixes a conversion problem when there is a mismatch between
- the encoding of the operating system and database server.
-
-
-
-
- Fix Windows linking of
pg_dump using - win32.mak
- (Hiroshi Saito)
-
-
-
-
- Fix planner mistakes for outer join queries (Tom)
-
-
-
-
- Fix several problems in queries involving sub-SELECTs (Tom)
-
-
-
-
- Fix potential crash in SPI during subtransaction abort (Tom)
-
-
- This affects all PL functions since they all use SPI.
-
-
-
-
- Improve build speed of
PDF documentation (Peter) -
-
-
-
- Re-add
JST (Japan) timezone abbreviation (Tom) -
-
-
-
- Improve optimization decisions related to index scans (Tom)
-
-
-
-
- Have
psql print multi-byte combining characters as - before, rather than output as \u (Tom)
-
-
-
-
- Improve index usage of regular expressions that use parentheses (Tom)
-
-
- This improves
psql \d performance also. -
-
-
-
- Make
pg_dumpall assume that databases have public - CONNECT privilege, when dumping from a pre-8.2 server (Tom)
-
-
- This preserves the previous behavior that anyone can connect to a
- database if allowed by pg_hba.conf.
-
-
-
-
-
-
-
-
-
-
Release 8.2
-
-
-
Release date
- 2006-12-05
-
-
-
-
Overview
-
- This release adds many functionality and performance improvements that
- were requested by users, including:
-
-
-
-
- Query language enhancements including INSERT/UPDATE/DELETE
- RETURNING, multirow VALUES lists, and
- optional target-table alias in
- UPDATE/DELETE
-
-
-
-
- Index creation without blocking concurrent
- INSERT/UPDATE/DELETE
- operations
-
-
-
-
- Many query optimization improvements, including support for
- reordering outer joins
-
-
-
-
- Improved sorting performance with lower memory usage
-
-
-
-
- More efficient locking with better concurrency
-
-
-
-
- More efficient vacuuming
-
-
-
-
- Easier administration of warm standby servers
-
-
-
-
- New FILLFACTOR support for tables and indexes
-
-
-
-
- Monitoring, logging, and performance tuning additions
-
-
-
-
- More control over creating and dropping objects
-
-
-
-
- Table inheritance relationships can be defined
- for and removed from pre-existing tables
-
-
-
-
- COPY TO can copy the output of an arbitrary
- SELECT statement
-
-
-
-
- Array improvements, including nulls in arrays
-
-
-
-
- Aggregate-function improvements, including multiple-input
- aggregates and SQL:2003 statistical functions
-
-
-
-
- Many contrib/ improvements
-
-
-
-
-
-
-
-
-
-
-
Migration to Version 8.2
-
- A dump/restore using
pg_dump is
- required for those wishing to migrate data from any previous
- release.
-
-
- Observe the following incompatibilities:
-
-
-
-
-
- Set
- linkend="guc-escape-string-warning">escape_string_warning
- to on by default (Bruce)
-
-
- This issues a warning if backslash escapes are used in
- non-escape (non-E'')
- strings.
-
-
-
-
- Change the row
- constructor syntax (ROW(...)) so that
- list elements foo.* will be expanded to a list
- of their member fields, rather than creating a nested
- row type field as formerly (Tom)
-
-
- The new behavior is substantially more useful since it
- allows, for example, triggers to check for data changes
- with IF row(new.*) IS DISTINCT FROM row(old.*).
- The old behavior is still available by omitting .*.
-
-
-
-
- Make row comparisons
- follow
SQL standard semantics and allow them - to be used in index scans (Tom)
-
-
- Previously, row = and <> comparisons followed the
- standard but < <= > >= did not. A row comparison
- can now be used as an index constraint for a multicolumn
- index matching the row value.
-
-
-
-
- Make row IS NOT NULL
- tests follow
SQL standard semantics (Tom) -
-
- The former behavior conformed to the standard for simple cases
- with IS NULL, but IS NOT NULL would return
- true if any row field was non-null, whereas the standard says it
- should return true only when all fields are non-null.
-
-
-
-
- Make SET
- CONSTRAINT affect only one constraint (Kris Jurka)
-
-
- In previous releases, SET CONSTRAINT modified
- all constraints with a matching name. In this release,
- the schema search path is used to modify only the first
- matching constraint. A schema specification is also
- supported. This more nearly conforms to the SQL standard.
-
-
-
-
- Remove RULE permission for tables, for security reasons
- (Tom)
-
-
- As of this release, only a table's owner can create or modify
- rules for the table. For backwards compatibility,
- GRANT/REVOKE RULE is still accepted,
- but it does nothing.
-
-
-
-
- Array comparison improvements (Tom)
-
-
- Now array dimensions are also compared.
-
-
-
-
- Change array concatenation
- to match documented behavior (Tom)
-
-
- This changes the previous behavior where concatenation
- would modify the array lower bound.
-
-
-
-
- Make command-line options of
postmaster - identical (Peter)
-
-
- This allows the postmaster to pass arguments to each backend
- without using -o. Note that some options are now
- only available as long-form options, because there were conflicting
- single-letter options.
-
-
-
-
- Deprecate use of
postmaster symbolic link (Peter) -
-
-
postmaster and postgres - commands now act identically, with the behavior determined
- by command-line options. The
postmaster symbolic link is - kept for compatibility, but is not really needed.
-
-
-
-
- Change
- linkend="guc-log-duration">log_duration
- to output even if the query is not output (Tom)
-
-
- In prior releases, log_duration only printed if
- the query appeared earlier in the log.
-
-
-
-
- Make
- linkend="functions-formatting">to_char(time)
- and
- linkend="functions-formatting">to_char(interval)
- treat HH and HH12 as 12-hour
- intervals
-
-
- Most applications should use HH24 unless they
- want a 12-hour display.
-
-
-
-
- Zero unmasked bits in conversion from
- linkend="datatype-inet">
INET to
- linkend="datatype-inet">CIDR (Tom)
-
-
- This ensures that the converted value is actually valid for
- CIDR.
-
-
-
-
- Remove australian_timezones configuration variable
- (Joachim Wieland)
-
-
- This variable has been superseded by a more general facility
- for configuring timezone abbreviations.
-
-
-
-
- Improve cost estimation for nested-loop index scans (Tom)
-
-
- This might eliminate the need to set unrealistically small
- values of
- linkend="guc-random-page-cost">random_page_cost.
- If you have been using a very small random_page_cost,
- please recheck your test cases.
-
-
-
-
- Change behavior of pg_dump -n and
- -t options. (Greg Sabino Mullane)
-
- See the pg_dump manual page for details.
-
-
-
-
- PQdsplen() to return a useful value (Martijn
- van Oosterhout)
-
-
-
-
- PQgetssl() as returning void *,
- rather than SSL * (Martijn van Oosterhout)
-
-
- This allows applications to use the function without including
- the OpenSSL headers.
-
-
-
-
- C-language loadable modules must now include a
- PG_MODULE_MAGIC
- macro call for version compatibility checking
- (Martijn van Oosterhout)
-
-
-
-
- For security's sake, modules used by a PL/PerlU function are no
- longer available to PL/Perl functions (Andrew)
-
-
- This also implies that data can no longer be shared between a PL/Perl
- function and a PL/PerlU function.
- Some Perl installations have not been compiled with the correct flags
- to allow multiple interpreters to exist within a single process.
- In this situation PL/Perl and PL/PerlU cannot both be used in a
- single backend. The solution is to get a Perl installation which
- supports multiple interpreters.
-
-
-
-
-
- In contrib/xml2/, rename xml_valid() to
- xml_is_well_formed() (Tom)
-
-
- xml_valid() will remain for backward compatibility,
- but its behavior will change to do schema checking in a future
- release.
-
-
-
-
- Remove
contrib/ora2pg/, now at
- url="http://www.samse.fr/GPL/ora2pg">
-
-
-
-
- Remove contrib modules that have been migrated to PgFoundry:
- adddepend, dbase, dbmirror,
- fulltextindex, mac, userlock
-
-
-
-
- Remove abandoned contrib modules:
- mSQL-interface, tips
-
-
-
-
- Remove
QNX and BEOS ports (Bruce) -
-
- These ports no longer had active maintainers.
-
-
-
-
-
-
-
-
Changes
-
- Below you will find a detailed account of the
- changes between
PostgreSQL 8.2 and
- the previous major release.
-
-
-
-
Performance Improvements
-
-
-
- Allow the planner to reorder outer
- joins in some circumstances (Tom)
-
-
- In previous releases, outer joins would always be evaluated in
- the order written in the query. This change allows the
- query optimizer to consider reordering outer joins, in cases where
- it can determine that the join order can be changed without
- altering the meaning of the query. This can make a
- considerable performance difference for queries involving
- multiple outer joins or mixed inner and outer joins.
-
-
-
-
- Improve efficiency of
- linkend="functions-comparisons">IN
- (list-of-expressions) clauses (Tom)
-
-
-
-
- Improve sorting speed and reduce memory usage (Simon, Tom)
-
-
-
-
- Improve subtransaction performance (Alvaro, Itagaki Takahiro,
- Tom)
-
-
-
-
- Add
FILLFACTOR to
- linkend="SQL-CREATETABLE">table and
- linkend="SQL-CREATEINDEX">index creation (ITAGAKI
- Takahiro)
-
-
- This leaves extra free space in each table or index page,
- allowing improved performance as the database grows. This
- is particularly valuable to maintain clustering.
-
-
-
-
- Increase default values for
- linkend="guc-shared-buffers">shared_buffers
- and max_fsm_pages
- (Andrew)
-
-
-
-
- Improve locking performance by breaking the lock manager tables into
- sections
- (Tom)
-
-
- This allows locking to be more fine-grained, reducing
- contention.
-
-
-
-
- Reduce locking requirements of sequential scans (Qingqing
- Zhou)
-
-
-
-
- Reduce locking required for database creation and destruction
- (Tom)
-
-
-
-
- Improve the optimizer's selectivity estimates for
- linkend="functions-like">
LIKE,
- linkend="functions-like">ILIKE, and
- regular expression
- operations (Tom)
-
-
-
-
- Improve planning of joins to inherited
- tables and UNION
- ALL views (Tom)
-
-
-
-
- Allow constraint
- exclusion to be applied to
- linkend="ddl-inherit">inherited UPDATE and
- DELETE queries (Tom)
-
-
- SELECT already honored constraint exclusion.
-
-
-
-
- Improve planning of constant WHERE clauses, such as
- a condition that depends only on variables inherited from an
- outer query level (Tom)
-
-
-
-
- Protocol-level unnamed prepared statements are re-planned
- for each set of BIND values (Tom)
-
-
- This improves performance because the exact parameter values
- can be used in the plan.
-
-
-
-
- Speed up vacuuming of B-Tree indexes (Heikki Linnakangas,
- Tom)
-
-
-
-
- Avoid extra scan of tables without indexes during
- linkend="SQL-VACUUM">VACUUM (Greg Stark)
-
-
-
-
- Improve multicolumn
GiST - indexing (Oleg, Teodor)
-
-
-
-
- Remove dead index entries before B-Tree page split (Junji
- Teramoto)
-
-
-
-
-
-
-
-
-
Server Changes
-
-
-
- Allow a forced switch to a new transaction log file (Simon, Tom)
-
-
- This is valuable for keeping warm standby slave servers
- in sync with the master. Transaction log file switching now also happens
- automatically during
- linkend="functions-admin">pg_stop_backup().
- This ensures that all
- transaction log files needed for recovery can be archived immediately.
-
-
-
-
- Add
WAL informational functions (Simon) -
-
- Add functions for interrogating the current transaction log insertion
- point and determining
WAL filenames from the - hex
WAL locations displayed by
- linkend="functions-admin">pg_stop_backup()
- and related functions.
-
-
-
-
- Improve recovery from a crash during
WAL replay (Simon) -
-
- The server now does periodic checkpoints during
WAL - recovery, so if there is a crash, future
WAL - recovery is shortened. This also eliminates the need for
- warm standby servers to replay the entire log since the
- base backup if they crash.
-
-
-
-
- Improve reliability of long-term
WAL replay - (Heikki, Simon, Tom)
-
-
- Formerly, trying to roll forward through more than 2 billion
- transactions would not work due to XID wraparound. This meant
- warm standby servers had to be reloaded
- from fresh base backups periodically.
-
-
-
-
- Add
- linkend="guc-archive-timeout">archive_timeout
- to force transaction log file switches at a given interval (Simon)
-
-
- This enforces a maximum replication delay for warm standby servers.
-
-
-
-
- authentication (Magnus Hagander)
-
-
- This is particularly useful for platforms that do not
- support
PAM, such as Windows. -
-
-
-
- Add GRANT
- CONNECT ON DATABASE (Gevik Babakhani)
-
-
- This gives SQL-level control over database access. It works as
- an additional filter on top of the existing
- pg_hba.conf
- controls.
-
-
-
-
- Certificate Revocation List (
CRL) files - (Libor Hohoš)
-
-
- The server and
libpq both recognize CRL - files now.
-
-
-
-
- now clusterable (Teodor)
-
-
-
-
- Remove routine autovacuum server log entries (Bruce)
-
-
-
- linkend="monitoring-stats-views-table">pg_stat_activity
- now shows autovacuum activity.
-
-
-
-
- Track maximum XID age within individual tables, instead of whole databases (Alvaro)
-
-
- This reduces the overhead involved in preventing transaction
- ID wraparound, by avoiding unnecessary VACUUMs.
-
-
-
-
- Add last vacuum and analyze timestamp columns to the stats
- collector (Larry Rosenman)
-
-
- These values now appear in the
- linkend="monitoring-stats-views-table">pg_stat_*_tables
- system views.
-
-
-
-
- Improve performance of statistics monitoring, especially
- stats_command_string
- (Tom, Bruce)
-
-
- This release enables stats_command_string by
- default, now that its overhead is minimal. This means
-
- linkend="monitoring-stats-views-table">pg_stat_activity
- will now show all active queries by default.
-
-
-
-
- Add a
waiting column to
- linkend="monitoring-stats-views-table">pg_stat_activity
- (Tom)
-
-
- This allows pg_stat_activity to show all the
- information included in the
ps display. -
-
-
-
- Add configuration parameter
- linkend="guc-update-process-title">update_process_title
- to control whether the
ps display is updated - for every command (Bruce)
-
-
- On platforms where it is expensive to update the
ps - display, it might be worthwhile to turn this off and rely solely on
- pg_stat_activity for status information.
-
-
-
-
- Allow units to be specified in configuration settings
- (Peter)
-
-
- For example, you can now set
- linkend="guc-shared-buffers">shared_buffers
- to 32MB rather than mentally converting sizes.
-
-
-
-
- Add support for include
- directives in postgresql.conf (Joachim
- Wieland)
-
-
-
-
- Improve logging of protocol-level prepare/bind/execute
- messages (Bruce, Tom)
-
-
- Such logging now shows statement names, bind parameter
- values, and the text of the query being executed. Also,
- the query text is properly included in logged error messages
- when enabled by log_min_error_statement.
-
-
-
-
- Prevent
- linkend="guc-max-stack-depth">max_stack_depth
- from being set to unsafe values
-
-
- On platforms where we can determine the actual kernel stack depth
- limit (which is most), make sure that the initial default value of
- max_stack_depth is safe, and reject attempts to set it
- to unsafely large values.
-
-
-
-
- Enable highlighting of error location in query in more
- cases (Tom)
-
-
- The server is now able to report a specific error location for
- some semantic errors (such as unrecognized column name), rather
- than just for basic syntax errors as before.
-
-
-
-
- Fix failed to re-find parent key errors in
- VACUUM (Tom)
-
-
-
-
- Clean out pg_internal.init cache files during server
- restart (Simon)
-
-
- This avoids a hazard that the cache files might contain stale
- data after PITR recovery.
-
-
-
-
- Fix race condition for truncation of a large relation across a
- gigabyte boundary by VACUUM (Tom)
-
-
-
-
- Fix bug causing needless deadlock errors on row-level locks (Tom)
-
-
-
-
- Fix bugs affecting multi-gigabyte hash indexes (Tom)
-
-
-
-
- Each backend process is now its own process group leader (Tom)
-
-
- This allows query cancel to abort subprocesses invoked from a
- backend or archive/recovery process.
-
-
-
-
-
-
-
-
-
Query Changes
-
-
-
- Add INSERT/
projects / postgresql.git / commitdiff