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<chapter id="release"> |
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<chapter id="release"> |
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<title>Release Notes</title> |
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<title>Release Notes</title> |
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<sect1> |
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<title>Release 7.0</title> |
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<!-- |
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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>2000-04-01</date> |
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</docinfo> |
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--> |
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<para> |
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This release shows the continued growth of PostgreSQL. There are more |
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changes in 7.0 than in any previous release. Don't be concerned this is |
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a dot-zero release. We do our best to put out only solid releases, and |
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this one is no exception. |
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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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Foreign Keys |
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</term> |
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<listitem> |
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<para> |
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Foreign keys are now implemented, with the exception of PARTIAL MATCH |
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foreign keys. Many users have been asking for this feature, and we are |
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pleased to offer it. |
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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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Optimizer Overhaul |
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</term> |
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<listitem> |
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<para> |
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Continuing on work started a year ago, the optimizer has been |
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overhauled, allowing improved query execution and better performance |
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with less memory usage. |
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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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Updated psql |
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</term> |
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<listitem> |
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<para> |
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<application>psql</application>, our interactive terminal monitor, has been |
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updated with a variety of new features. See the psql manual page for details. |
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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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Upcoming Features |
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</term> |
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<listitem> |
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<para> |
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In 7.1, we plan to have outer joins, storage for very long rows, and a |
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write-ahead logging system. |
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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 v7.0</title> |
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<para> |
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A dump/restore using <application>pg_dump</application> |
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is required for those wishing to migrate data from any |
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previous release of <productname>Postgres</productname>. |
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For those upgrading from 6.5.*, you can use |
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<application>pg_upgrade</application> to upgrade to this |
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release. |
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</para> |
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</sect2> |
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<sect2> |
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<title>Detailed Change List</title> |
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<para> |
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<programlisting> |
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Bug Fixes |
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--------- |
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Prevent function calls with more than maximum number of arguments (Tom) |
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Many fixes for CASE (Tom) |
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Fix SELECT coalesce(f1,0) FROM int4_tbl GROUP BY f1 (Tom) |
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Fix SELECT sentence.words[0] FROM sentence GROUP BY sentence.words[0] (Tom) |
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Fix GROUP BY scan bug (Tom) |
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Improvements in SQL grammar processing (Tom) |
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Fix for views involved in INSERT ... SELECT ... (Tom) |
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Fix for SELECT a/2, a/2 FROM test_missing_target GROUP BY a/2 (Tom) |
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Fix for subselects in INSERT ... SELECT (Tom) |
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Prevent INSERT ... SELECT ... ORDER BY (Tom) |
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Fixes for relations greater than 2GB, including vacuum |
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Improve communication of system table changes to other running backends (Tom) |
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Improve communication of user table modifications to other running backends (Tom) |
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Fix handling of temp tables in complex situations (Bruce, Tom) |
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Allow table locking when tables opened, improving concurrent reliability (Tom) |
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Properly quote sequence names in pg_dump (Ross J. Reedstrom) |
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Prevent DESTROY DATABASE while others accessing |
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Prevent any rows from being returned by GROUP BY if no rows processed (Tom) |
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Fix SELECT COUNT(1) FROM table WHERE ...' if no rows matching WHERE (Tom) |
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Fix pg_upgrade so it works for MVCC(Tom) |
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Fix for SELECT ... WHERE x IN (SELECT ... HAVING SUM(x) > 1) (Tom) |
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Make TABLE optional keyword in LOCK TABLE (Bruce) |
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Fix for "f1 datetime DEFAULT 'now'" (Tom) |
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Fix problems with CURRENT_DATE used in DEFAULT (Tom) |
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Allow comment-only lines, and ;;; lines too. (Tom) |
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Improve recovery after failed disk writes, disk full (Hiroshi) |
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Fix cases where table is mentioned in FROM but not joined (Tom) |
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Allow HAVING clause without aggregate functions (Tom) |
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Fix for "--" comment and no trailing newline, as seen in Perl |
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Improve pg_dump failure error reports (Bruce) |
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Allow sorts and hashes to exceed 2GB file sizes (Tom) |
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Fix for pg_dump dumping of inherited rules (Tom) |
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Fix for NULL handling comparisons (Tom) |
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Fix inconsistent state caused by failed CREATE/DROP commands (Hiroshi) |
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Fix for dbname with dash |
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Prevent DROP INDEX from interfering with other backends (Tom) |
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Fix file descriptor leak in verify_password() |
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Fix for "Unable to identify an operator =$" problem |
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Fix ODBC so no segfault if CommLog and Debug enabled (Dirk Niggemann) |
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Fix for recursive exit call (Massimo) |
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Fix for extra-long timezones (Jeroen van Vianen) |
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Make pg_dump preserve primary key information (Peter E) |
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Prevent databases with single quotes (Peter E) |
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Prevent DROP DATABASE inside transaction (Peter E) |
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ecpg memory leak fixes (Stephen Birch) |
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Fix for SELECT null::text, SELECT int4fac(null) and SELECT 2 + (null) (Tom) |
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Y2K timestamp fix (Massimo) |
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Fix for VACUUM 'HEAP_MOVED_IN was not expected' errors (Tom) |
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Fix for views with tables/columns containing spaces (Tom) |
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Prevent permissions on indexes (Peter E) |
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Fix for spinlock stuck problem when error is generated (Hiroshi) |
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Fix ipcclean on Linux |
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Fix handling of NULL constraint conditions (Tom) |
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Fix memory leak in odbc driver (Nick Gorham) |
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Fix for permission check on UNION tables (Tom) |
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Fix to allow SELECT 'a' LIKE 'a' (Tom) |
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Fix for SELECT 1 + NULL (Tom) |
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Fixes to CHAR |
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Fix log() on numeric type (Tom) |
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Remove ':' and ';' operators |
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Enhancements |
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------------ |
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New CLI interface include file sqlcli.h, based on SQL3/SQL98 |
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Remove all limits on query length, row length limit still exists (Tom) |
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Update jdbc protocol to 2.0 (Jens Glaser jens@jens.de) |
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Add TRUNCATE command to quickly truncate relation (Mike Mascari) |
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Fix to give super user and createdb user proper update catalog rights (Peter E) |
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Allow ecpg bool variables to have NULL values (Christof) |
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Issue ecpg error if NULL value is returned to variable with no NULL |
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indicator (Christof) |
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Allow ^C to cancel COPY command (Massimo) |
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Add SET FSYNC and SHOW PG_OPTIONS commands(Massimo) |
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Improve CREATE FUNCTION to allow type conversion specification |
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(Bernie Frankpitt) |
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Add CmdTuples() to libpq++(Vince) |
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New CREATE CONSTRAINT TRIGGER and SET CONSTRAINTS commands(Jan) |
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Allow CREATE FUNCTION WITH clause to be used for all language types |
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configure --enable-debug adds -g (Peter E) |
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configure --disable-debug removes -g (Peter E) |
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Allow more complex default expressions (Tom) |
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First real FOREIGN KEY constraint trigger functionality (Jan) |
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Add FOREIGN KEY ... MATCH FULL ... ON DELETE CASCADE (Jan) |
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Add FOREIGN KEY ... MATCH <unspecified> referential actions (Don Baccus) |
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Allow WHERE restriction on ctid (physical heap location) (Hiroshi) |
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Move pginterface from contrib to interface directory, rename to pgeasy (Bruce) |
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Add DEC and SESSION_USER as reserved words |
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Require SELECT DISTINCT target list to have all ORDER BY columns (Tom) |
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Add Oracle's COMMENT ON command (Mike Mascari <mascarim@yahoo. |
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libpq's PQsetNoticeProcessor function now returns previous hook(Peter E) |
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Prevent PQsetNoticeProcessor from being set to NULL (Peter E) |
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Make USING in COPY optional (Bruce) |
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Allow subselects in the target list (Tom) |
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Allow subselects on the left side of comparison operators (Tom) |
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New parallel regression test (Jan) |
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Change backend-side COPY to write files with permissions 644 not 666 (Tom) |
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Force permissions on PGDATA directory to be secure, even if it exists (Tom) |
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Added psql LastOid variable to return last inserted oid (Peter E) |
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Allow concurrent vacuum and remove pg_vlock vacuum lock file (Tom) |
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Add permissions check so only Postgres superuser or table owner can |
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vacuum (Peter E) |
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New libpq functions to allow asynchronous connections: PQconnectStart(), |
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PQconnectPoll(), PQresetStart(), PQresetPoll(), PQsetenvStart(), |
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PQsetenvPoll(), PQsetenvAbort (Ewan Mellor) |
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New libpq PQsetenv() function (Ewan Mellor) |
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create/alter user extension (Peter E) |
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New postmaster.pid and postmaster.opts under $PGDATA (Tatsuo) |
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New scripts for create/drop user/db (Peter E) |
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Major psql overhaul(Peter E) |
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Add const to libpq interface(Peter E) |
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New libpq function PQoidValue (Peter E) |
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Show specific non-aggregate causing problem with GROUP BY (Tom) |
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Make changes to pg_shadow recreate pg_pwd file (Peter E) |
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Add aggregate(DISTINCT ...) (Tom) |
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Allow flag to control COPY input/output of NULLs (Peter E) |
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Make postgres user have a password by default (Peter E) |
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Add CREATE/ALTER/DROP GROUP (Peter E) |
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All administration scripts now support --long options (Peter E, Karel) |
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Vacuumdb script now supports --alldb option (Peter E) |
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ecpg new portable FETCH syntax |
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Add ecpg EXEC SQL IFDEF, EXEC SQL IFNDEF, EXEC SQL ELSE, EXEC SQL ELIF |
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and EXEC SQL ENDIF directives |
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Add pg_ctl script to control backend startup (Tatsuo) |
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Add postmaster.opts.default file to store startup flags (Tatsuo) |
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Allow --with-mb=SQL_ASCII |
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Increase maximum number of index keys to 16 (Bruce) |
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Increase maximum number of function arguments to 16 (Bruce) |
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Allow user configuration of maximum number of index keys and arguments |
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(Bruce) |
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Allow unprivileged users to change their passwords (Peter E) |
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With password authentication enabled, new users without passwords can't |
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connect (Peter E) |
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Disallow dropping a user who owns a database (Peter E) |
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Add initdb --enable-multibyte option (Peter E) |
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Add option for initdb to prompts for superuser password (Peter E) |
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Allow complex type casts like col::numeric(9,2) and col::int2::float8 (Tom) |
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Updated user interfaces on initdb, initlocation, pg_dump, ipcclean |
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(Peter E) |
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New pg_char_to_encoding() and pg_encoding_to_char() functions (Tatsuo |
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Libpq non-blocking mode (Alfred Perlstein) |
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Improve conversion of types in casts that don't specify a length |
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New plperl internal programming language (Mark Hollomon) |
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Allow COPY IN to read file that do not end with a newline (Tom) |
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Indicate when long identifiers are truncated (Tom) |
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Allow aggregates to use type equivalency (Peter E) |
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Add Oracle's to_char(), to_date(), to_datetime(), to_timestamp(), to_number() |
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conversion functions (Karel Zak <zakkr@zf.jcu.cz>) |
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Add SELECT DISTINCT ON (expr [, expr ...]) targetlist ... (Tom) |
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Check to be sure ORDER BY is compatible with the DISTINCT operation (Tom) |
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Add NUMERIC and int8 types to ODBC |
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Improve EXPLAIN results for Append, Group, Agg, Unique (Tom) |
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Add ALTER TABLE ... ADD FOREIGN KEY (Stephan Szabo) |
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Allow SELECT .. FOR UPDATE in PL/pgSQL (Hiroshi) |
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Enable backward sequential scan even after reaching EOF (Hiroshi) |
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Add btree indexing of boolean values, >= and <= (Don Baccus) |
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Print current line number when COPY FROM fails (Massimo) |
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Recognize special case of POSIX time zone: "GMT+8" and "GMT-8" (Thomas) |
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Add DEC as synonym for "DECIMAL (Thomas) |
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Add SESSION_USER as SQL92 keyword, same as CURRENT_USER (Thomas) |
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Implement column aliases (aka correlation names) and more join syntax |
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(Thomas) |
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Allow queries like SELECT a FROM t1 tx (a) (Thomas) |
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Allow queries like SELECT * FROM t1 NATURAL JOIN t2 (Thomas) |
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Make INTERVAL reserved word allowed as a column identifier (Thomas) |
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Implement REINDEX command (Hiroshi) |
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Accept ALL in aggregate function SUM(ALL col) (Tom) |
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Prevent GROUP BY from using column aliases (Tom) |
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New psql \encoding option (Tatsuo) |
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Allow PQrequestCancel() to terminate when in waiting-for-lock state (Hiroshi) |
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Allow negation of a negative number in all cases |
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Add ecpg descriptors (Christof, Michael) |
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Allow CREATE VIEW v AS SELECT f1::char(8) FROM tbl |
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Allow casts with length, like foo::char(8) |
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New libpq functions PQsetClientEncoding(), PQclientEncoding() (Tatsuo) |
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Add support for SJIS user defined characters (Tatsuo) |
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Larger views/rules supported |
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Make libpq's PQconndefaults() thread-safe (Tom) |
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Disable // as comment to be ANSI conforming, should use -- |
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Allow column aliases on views CREATE VIEW name (collist) |
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Fixes for views with subqueries (Tom) |
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Allow UPDATE table SET fld = (SELECT ...) (Tom) |
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Types |
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----- |
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Many array fixes (Tom) |
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Allow bare column names to be subscripted as arrays (Tom) |
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Improve type casting of int and float constants (Tom) |
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Cleanups for int8 inputs, range checking, and type conversion (Tom) |
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Fix for SELECT timespan('21:11:26'::time) (Tom) |
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Fix for netmask('x.x.x.x/0') is 255.255.255.255 instead of 0.0.0.0 |
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(Oleg Sharoiko) |
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Add btree index on NUMERIC(Jan) |
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Perl fix for large objects containing NUL characters (Douglas Thomson) |
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ODBC fix for for large objects (free) |
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Fix indexing of cidr data type |
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Fix for Ethernet MAC addresses (macaddr type) comparisons |
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Fix for date/time types when overflows happened in computations (Tom) |
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Allow array on int8 (Peter E) |
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Fix for rounding/overflow of NUMERIC type, like NUMERIC(4,4) (Tom) |
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Allow NUMERIC arrays |
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Fix bugs in NUMERIC ceil() and floor() functions (Tom) |
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Make char_length()/octet_length including trailing blanks (Tom) |
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Made abstime/reltime use int4 instead of time_t (Peter E) |
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New lztext data type for compressed text fields |
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Revise code to handle coercion of int and float constants (Tom) |
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New C-routines to implement a BIT and BIT VARYING type in /contrib |
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(Adriaan Joubert) |
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NUMERIC now accepts scientific notation (Tom) |
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NUMERIC to int4 rounds (Tom) |
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Convert float4/8 to NUMERIC properly (Tom) |
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Allow type conversion with NUMERIC (Thomas) |
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Make ISO date style (2000-02-16 09:33) the default (Thomas) |
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Add NATIONAL CHAR [ VARYING ] |
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Allow NUMERIC round and trunc to accept negative scales (Tom) |
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New TIME WITH TIME ZONE type (Thomas) |
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Add MAX()/MIN() on time type (Thomas) |
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Add abs(), mod(), fac() for int8 (Thomas) |
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Add round(), sqrt(), cbrt(), pow() |
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Rename NUMERIC power() to pow() |
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Improved TRANSLATE() function |
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Allow X=-Y operators (Tom) |
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Add exp() and ln() as NUMERIC types |
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Allow SELECT float8(COUNT(*)) / (SELECT COUNT(*) FROM int4_tbl) FROM int4_tbl |
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GROUP BY f1; (Tom) |
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Performance |
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----------- |
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Prevent exponential space consumption with many AND's and OR's (Tom) |
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Collect attribute selectivity values for system columns (Tom) |
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Reduce memory usage of aggregates (Tom) |
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Fix for LIKE optimization to use indexes with multi-byte encodings (Tom) |
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Fix r-tree index optimizer selectivity (Thomas) |
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Improve optimizer selectivity computations and functions (Tom) |
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Optimize btree searching for cases where many equal keys exist (Tom) |
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Enable fast LIKE index processing only if index present (Tom) |
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Re-use free space on index pages with duplicates (Tom) |
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Improve hash join processing (Tom) |
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Prevent descending sort if result is already sorted(Hiroshi) |
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Allow commuting of index scan query qualifications (Tom) |
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Prefer index scans in cases where ORDER BY/GROUP BY is required (Tom) |
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Allocate large memory requests in fix-sized chunks for performance (Tom) |
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Fix vacuum's performance by reducing memory allocation requests (Tom) |
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Implement constant-expression simplification (Bernard Frankpitt, Tom) |
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Allow more than first column to be used to determine start of index scan |
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(Hiroshi) |
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Prevent quadruple use of disk space when doing internal sorting (Tom) |
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Faster sorting by calling fewer functions (Tom) |
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Create system indexes to match all system caches (Bruce, Hiroshi) |
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Make system caches use system indexes(Bruce) |
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Make all system indexes unique(Bruce) |
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Improve pg_statistics management for VACUUM speed improvement (Tom) |
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Flush backend cache less frequently (Tom, Hiroshi) |
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COPY now reuses previous memory allocation, improving performance (Tom) |
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Improve optimization cost estimation (Tom) |
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Improve optimizer estimate of range queries x > lowbound AND x < highbound (Tom) |
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Use DNF instead of CNF where appropriate (Tom, Taral) |
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Further cleanup for OR-of-AND WHERE-clauses (Tom) |
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Make use of index in OR clauses (x = 1 AND y = 2) OR (x = 2 AND y = 4) (Tom) |
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Smarter optimizer computations for random index page access (Tom) |
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New SET variable to control optimizer costs (Tom) |
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Optimizer queries based on LIMIT, OFFSET, and EXISTS qualifications (Tom) |
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|
Reduce optimizer internal housekeeping of join paths for speedup (Tom) |
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Major subquery speedup (Tom) |
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|
Source Tree Changes |
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|
|
------------------- |
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|
Fix for linux PPC compile |
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|
New generic expression-tree-walker subroutine (Tom) |
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|
Change form() to varargform() to prevent portability problems. |
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|
Improved range checking for large integers on Alpha's |
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|
|
Clean up #include in /include directory (Bruce) |
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Add scripts for checking includes (Bruce) |
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|
Remove un-needed #include's from *.c files (Bruce) |
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Change #include's to use <> and "" as appropriate (Bruce) |
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|
Enable WIN32 compilation of libpq |
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|
|
Alpha spinlock fix from Uncle George <gatgul@voicenet.com> |
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|
|
Overhaul of optimizer data structures (Tom) |
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|
Fix to cygipc library (Yutaka Tanida) |
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|
Allow pgsql to work on newer Cygwin snapshots(Dan) |
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New catalog version number (Tom) |
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|
Add Linux ARM. |
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|
Rename heap_replace to heap_update |
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|
Update for QNX (Kardos, Dr. Andreas) |
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|
New platform-specific regression handling (Tom) |
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|
|
Rename oid8 -> oidvector and int28 -> int2vector (Bruce) |
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|
Included all yacc and lex files into the distribution (Peter E.) |
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|
Remove lextest, no longer needed (Peter E) |
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|
Fix for libpq and psql on Win32 (Magnus) |
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|
Internally change datetime and timespan into timestamp and interval (Thomas) |
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|
Fix for plpgsql on BSDI |
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|
|
Add SQL_ASCII test case to the regression test (Tatsuo) |
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|
configure --with-mb now deprecated (Tatsuo) |
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|
NT fixes |
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|
NetBSD fixes Johnny C. Lam <lamj@stat.cmu.edu> |
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Fixes for Alpha compiles |
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|
New multibyte encodings |
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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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|
<sect1> |
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|
|
<title>Release 6.5.3</title> |
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|
|
<title>Release 6.5.3</title> |
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|
<!-- |
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|
<!-- |
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|
@ -169,8 +568,8 @@ Add Win1250 (Czech) support (Pavel Behal) |
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|
|
</sect1> |
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|
</sect1> |
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|
<sect1> |
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|
<sect1> |
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|
|
<title>Release 6.5</title> |
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|
|
<title>Release 6.5</title> |
|
|
|
<!-- |
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|
|
<!-- |
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|
|
<docinfo> |
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|
|
<docinfo> |
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|
|
<authorgroup> |
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|
|
<authorgroup> |
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|
|
@ -442,7 +841,7 @@ Fix for memory leak in executor with fjIsNull |
|
|
|
Fix for aggregate memory leaks(Erik Riedel) |
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|
|
Fix for aggregate memory leaks(Erik Riedel) |
|
|
|
Allow username containing a dash GRANT permissions |
|
|
|
Allow username containing a dash GRANT permissions |
|
|
|
Cleanup of NULL in inet types |
|
|
|
Cleanup of NULL in inet types |
|
|
|
Clean up system table bugs(Tom) |
|
|
|
Clean up system table bugs(Tom) |
|
|
|
Fix problems of PAGER and \? command(Masaaki Sakaida) |
|
|
|
Fix problems of PAGER and \? command(Masaaki Sakaida) |
|
|
|
Reduce default multi-segment file size limit to 1GB(Peter) |
|
|
|
Reduce default multi-segment file size limit to 1GB(Peter) |
|
|
|
Fix for dumping of CREATE OPERATOR(Tom) |
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|
|
Fix for dumping of CREATE OPERATOR(Tom) |
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|
Bruce Momjian
26 years ago