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$Header: /cvsroot/pgsql/doc/src/sgml/release.sgml,v 1.63 2000/11/12 14:26:48 momjian Exp $ |
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$Header: /cvsroot/pgsql/doc/src/sgml/release.sgml,v 1.64 2000/12/16 20:12:42 momjian Exp $ |
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--> |
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<chapter id="release"> |
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<title>Release Notes</title> |
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<sect1> |
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<title>Release 7.1</title> |
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<docinfo> |
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<authorgroup> |
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<author> |
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<firstname>Bruce</firstname> |
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<surname>Momjian</surname> |
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</author> |
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</authorgroup> |
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<date>2000-12-16</date> |
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</docinfo> |
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--> |
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<para> |
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Release date 2001-1-??. |
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This release focuses on removing limitations that have existed in the |
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PostgreSQL code for many years. |
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</para> |
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<para> |
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Major changes in this release: |
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<variablelist> |
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<varlistentry> |
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<term> |
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Write-ahead Log(WAL) |
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</term> |
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<listitem> |
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<para> |
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To maintain database consistency in case |
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of an operating system crash, previous releases of PostgreSQL have |
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forced all data modifications to disk before each transaction commit. |
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With WAL, only one log file must be flushed to disk, greatly improving |
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performance. If you have been using -F in previous releases to disable |
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disk flushes, you may want to consider discontinuing its use. |
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</para> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term> |
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TOAST |
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</term> |
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<listitem> |
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<para> |
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Previous releases had an 8k (or 32k) row length limit. |
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This limit made storage of long text fields difficult. With TOAST, long |
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rows of any length can be stored with good performance. |
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</para> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term> |
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Outer Joins |
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</term> |
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<listitem> |
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<para> |
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We now support outer joins. The UNION/NOT IN |
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workaround for outer joins is no longer required. We use the SQL92 |
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outer join syntax. |
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</para> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term> |
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Function Manager |
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</term> |
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<listitem> |
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<para> |
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The previous C function manager did not |
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handle NULLs properly, nor did it support 64-bit CPU's. The new |
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function manager does. You can continue using your old custom |
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functions, but you may want to rewrite them in the future to use the new |
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function manager call interface. |
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</para> |
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</listitem> |
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</varlistentry> |
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<varlistentry> |
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<term> |
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Complex Queries |
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</term> |
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<listitem> |
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<para> |
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A large number of complex queries that were |
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unsupported in previous releases now work. Many combinations of views, |
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aggregates, UNION, LIMIT, cursors, subqueries, and inherited tables |
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now work properly. Inherited tables are now accessed by default. |
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Subqueries in FROM are now supported. |
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</para> |
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</listitem> |
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</varlistentry> |
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</variablelist> |
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</para> |
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<sect2> |
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<title>Migration to v7.1</title> |
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<para> |
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A dump/restore using pg_dump is required for those wishing to migrate |
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data from any previous release. |
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</para> |
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</sect2> |
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<sect2> |
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<title>Changes</title> |
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<para> |
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<programlisting> |
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Last updated from CVS logs: 2000-12-11 |
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Bug Fixes |
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--------- |
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Many multi-byte/Unicode/locale fixes (Tatsuo and others) |
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More reliable ALTER TABLE RENAME (Tom) |
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Kerberos V fixes (David Wragg) |
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Fix for INSERT INTO...SELECT where targetlist has subqueries (Tom) |
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Prompt username/password on standard error (Bruce) |
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Large objects inv_read/inv_write fixes (Tom) |
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Fixes for to_char(), to_date(), to_ascii(), and to_timestamp() (Karel, |
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Daniel Baldoni) |
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Prevent query expressions from leaking memory (Tom) |
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Allow UPDATE of arrays elements (Tom) |
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Wake up lock waiters during cancel (Hiroshi) |
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Fix rare cursor crash when using hash join (Tom) |
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Fix for DROP TABLE/INDEX in rolled-back transaction (Hiroshi) |
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Fix psql crash from \l+ if MULTIBYTE enabled (Peter E) |
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Fix truncation of rule names during CREATE VIEW (Ross Reedstrom) |
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Fix PL/perl (Alex Kapranoff) |
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Disallow LOCK on views (Mark Holloman) |
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Disallow INSERT/UPDATE/DELETE on views (Mark Holloman) |
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Disallow DROP RULE, CREATE INDEX, TRUNCATE on views (Mark Holloman) |
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Allow PL/pgSQL accept non-ASCII identifiers (Tatsuo) |
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Allow views to proper handle GROUP BY, aggregates, DISTINCT (Tom) |
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Fix rare failure with TRUNCATE command (Tom) |
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Allow UNION/INTERSECT/EXCEPT to be used with ALL, subqueries, views, |
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DISTINCT, ORDER BY, SELECT...INTO (Tom) |
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Fix parser failures during aborted transactions (Tom) |
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Allow temporary relations to properly clean up indexes (Bruce) |
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Fix VACUUM problem with moving rows in same page (Tom) |
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Modify pg_dump so it dumps only user-defined items, not system-defined (Philip) |
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Allow LIMIT in VIEW (Tom) |
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Require cursor FETCH to honor LIMIT (Tom) |
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Allow PRIMARY/FOREIGN Key definitions on inherited columns (Stephan) |
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Allow ORDER BY, LIMIT in sub-selects (Tom) |
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Allow UNION in CREATE RULE (Tom) |
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Make DROP TABLE rollback-able (Tom) |
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Store initdb collation in pg_control so collation cannot be changed (Tom) |
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Fix INSERT...SELECT with rules (Tom) |
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Fix FOR UPDATE inside views and subselects (Tom) |
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Fix OVERLAPS operators conform to SQL92 spec regarding NULLs (Tom) |
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Fix lpad() and rpad() to handle length less than input string (Tom) |
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Enhancements |
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------------ |
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Add OUTER JOINs (Tom) |
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Function manager overhaul (Tom) |
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Allow ALTER TABLE RENAME on indexes(Tom) |
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Improve CLUSTER(Tom) |
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Improve ps status display for more platforms(Marc) |
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Improve CREATE FUNCTION failure message(Ross) |
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JDBC improvements (Peter, Travis Bauer, Christopher Cain, William Webber, |
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Gunnar) |
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Grand Unified Configuration scheme/GUC. Many options can now be set in |
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data/postgresql.conf, postmaster/postgres flags, or SET commands (Peter E) |
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Improved handling of file descriptor cache (Tom) |
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New warning code about auto-created table alias entries (Bruce) |
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Overhaul initdb process (Tom, Peter E) |
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Overhaul of inherited tables; inherited tables now accessed by default; |
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new ONLY keyword prevents it (Chris Bitmead, Tom) |
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ODBC cleanups/improvements (Nick Gorham, Stephan Szabo, Zoltan Kovacs, |
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Michael Fork) |
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Allow renaming of temp tables (Tom) |
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Overhaul memory manager contexts (Tom) |
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pg_dump uses CREATE USER or CREATE GROUP rather using COPY (Peter E) |
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Overhaul pg_dump (Philip Warner) |
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Allow pg_hba.conf secondary password file to specify username (Peter E) |
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Allow TEMPORARY or TEMP keyword when creating temporary tables (Bruce) |
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New memory leak checker (Karel) |
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New SET SESSION CHARACTERISTICS and SET DefaultXactIsoLevel (Thomas, Peter E) |
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Allow nested block comments (Thomas) |
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Add WITHOUT TIME ZONE type qualifier (Thomas) |
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New ALTER TABLE ADD CONSTRAINT (Stephan) |
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Use NUMERIC accumulators for INTEGER aggregates (Tom) |
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Overhaul aggregate code (Tom) |
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New VARIANCE and STDDEV() aggregates |
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Improve dependency ordering of pg_dump (Philip) |
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New pg_restore command (Philip) |
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New pg_dump tar output option (Philip) |
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New pg_dump of large objects (Philip) |
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New ESCAPE option to LIKE (Thomas) |
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New case-insensitive LIKE - ILIKE (Thomas) |
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Allow functional indexes to use binary-compatible type (Tom) |
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Allow SQL functions to be used in more contexts (Tom) |
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New pg_config utility (Peter E) |
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New PL/pgSQL EXECUTE command which allows dynamic SQL and utility statements |
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(Jan) |
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New PL/pgSQL GET DIAGNOSTICS statement for SPI value access (Jan) |
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New quote_identifiers() and quote_literal() functions (Jan) |
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New ALTER TABLE table OWNER TO user command (Mark Holloman) |
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Allow subselects in FROM, i.e. FROM (SELECT ...) [AS] alias (Tom) |
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Update PyGreSQL to version 3.1 (D'Arcy) |
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Store tables as files named by OID (Vadim) |
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New SQL function setval(seq,val,bool) for use in pg_dump (Philip) |
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New pg_service.conf file (Mario Weilguni) |
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Require DROP VIEW to remove views, no DROP TABLE (Mark) |
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Allow DROP VIEW view1, view2 (Mark) |
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Allow multiple objects in DROP INDEX, DROP RULE, and DROP TYPE (Tom) |
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Allow automatic conversion to Unicode (Tatsuo) |
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New /contrib/pgcrypto hashing functions (Marko Kreen) |
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New pg_dumpall --accounts-only option (Peter E) |
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New CHECKPOINT command for WAL which creates new WAL log file (Vadim) |
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New AT TIME ZONE syntax (Thomas) |
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Allow location of Unix domain socket to be configurable (David J. MacKenzie) |
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Allow postmaster to listen on a specific IP address (David J. MacKenzie) |
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Allow socket path name to be specified in hostname by using leading slash |
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(David J. MacKenzie) |
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Allow CREATE DATABASE to specify template database (Tom) |
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New template0 database that contains no user additions(Tom) |
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Types |
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----- |
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Fix INET/CIDR type ordering and add new functions (Tom) |
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Make OID behave as an unsigned type (Tom) |
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Allow BIGINT as synonym for INT8 (Peter E) |
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New int2 and int8 comparison operators (Tom) |
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New BIT and BIT VARYING types (Adriaan Joubert, Tom) |
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CHAR() no longer faster than VARCHAR() because of TOAST (Tom) |
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Performance |
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----------- |
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Write-Ahead Log (WAL) to provide crash recovery with less performance |
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overhead (Vadim) |
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ANALYZE stage of VACUUM no longer exclusively locks table (Bruce) |
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Reduced file seeks (Denis Perchine) |
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Improve BTREE code for duplicate keys (Tom) |
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Store all large objects in a single operating system file (Denis Perchine, Tom) |
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Improve memory allocation performance (Karel, Tom) |
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Source Code |
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----------- |
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New function manager call conventions (Tom) |
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SGI portability fixes (David Kaelbling) |
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New configure --enable-syslog option (Marc) |
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New BSDI README (Bruce) |
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configure script moved to top level, not /src (Peter E) |
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Makefile/configuration/compilation cleanups (Peter E) |
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New configure --with-python option (Peter E) |
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Solaris cleanups (Peter E) |
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Overhaul /contrib Makefiles (Karel) |
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New OpenSSL configuration option (Magnus, Peter E) |
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AIX fixes (Andreas) |
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New heap_open(), heap_openr() API (Tom) |
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Remove colon and semi-colon operators (Thomas) |
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New pg_class.relkind value for views (Mark Holloman) |
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Rename ichar() to chr() (Karel) |
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New documentation for btrim(), ascii(), chr(), repeat() (Karel) |
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Fixes for NT/Cygwin (Pete Forman) |
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AIX port fixes (Andreas) |
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New BeOS port (David Reid, Cyril Velter) |
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Add proofreader's changes to docs (Addison-Wesley, Bruce) |
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New Alpha spinlock code (Adriaan Joubert, Compaq) |
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Unixware port overhaul (Peter E) |
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New Darwin/Mac OSX port (Bruce Hartzler) |
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New FreeBSD Alpha port (Alfred) |
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Overhaul shared memory segments (Tom) |
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Add IBM S/390 support (Neale Ferguson) |
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</programlisting> |
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</para> |
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</sect2> |
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</sect1> |
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<sect1> |
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<title>Release 7.0.3</title> |
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<!-- |
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Bruce Momjian
25 years ago