mirror of https://github.com/postgres/postgres
file. Per Bruce's preference. Go to it Bruce! No info yet for v6.4.2 or upcoming releases.REL6_5_PATCHES
Thomas G. Lockhart
27 years ago
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<Sect1> |
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<Title>Release 6.4</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>1998-10-30</date> |
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</docinfo> |
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--> |
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|
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<para> |
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There are <emphasis>many</emphasis> new features and improvements in this release. |
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Thanks to our developers and maintainers, nearly every aspect of the system |
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has received some attention since the previous release. |
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Here is a brief, incomplete summary: |
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|
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<itemizedlist spacing="compact"> |
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<listitem> |
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<para> |
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Views and rules are now functional thanks to extensive new code in the |
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rewrite rules system from Jan Wieck. He also wrote a chapter on it |
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for the <citetitle>Programmer's Guide</citetitle>. |
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</para> |
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</listitem> |
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<listitem> |
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<para> |
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Jan also contributed a second procedural language, PL/pgSQL, to go with the |
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original PL/pgTCL procedural language he contributed last release. |
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</para> |
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</listitem> |
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|
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<listitem> |
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<para> |
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We have optional multiple-byte character set support from Tatsuo Iishi |
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to complement our existing locale support. |
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</para> |
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</listitem> |
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|
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<listitem> |
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<para> |
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Client/server communications has been cleaned up, with better support for |
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asynchronous messages and interrupts thanks to Tom Lane. |
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</para> |
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</listitem> |
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|
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<listitem> |
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<para> |
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The parser will now perform automatic type coersion to match arguments |
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to available operators and functions, and to match columns and expressions |
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with target columns. This uses a generic mechanism which supports |
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the type extensibility features of <productname>Postgres</productname>. |
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There is a new chapter in the <citetitle>User's Guide</citetitle> |
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which covers this topic. |
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</para> |
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</listitem> |
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|
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<listitem> |
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<para> |
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Three new data types have been added. |
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Two types, <type>inet</type> and <type>cidr</type>, support various forms |
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of IP network, subnet, and machine addressing. There is now an 8-byte integer |
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type available on some platforms. See the chapter on data types |
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in the <citetitle>User's Guide</citetitle> for details. |
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A fourth type, <type>serial</type>, is now supported by the parser as an |
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amalgam of the <type>int4</type> type, a sequence, and a unique index. |
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</para> |
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</listitem> |
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|
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<listitem> |
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<para> |
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Several more <acronym>SQL92</acronym>-compatible syntax features have been |
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added, including <command>INSERT DEFAULT VALUES</command> |
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</para> |
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</listitem> |
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|
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<listitem> |
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<para> |
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The automatic configuration and installation system has received some |
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attention, and should be more robust for more platforms than it has ever |
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been. |
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</para> |
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</listitem> |
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|
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</itemizedlist> |
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</para> |
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|
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<sect2> |
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<title>Migration to v6.4</title> |
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<para> |
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A dump/restore using <application>pg_dump</application> |
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or <application>pg_dumpall</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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</para> |
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</sect2> |
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<sect2> |
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<title>Detailed Change List</title> |
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|
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<para> |
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<programlisting> |
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Bug Fixes |
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--------- |
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Fix for a tiny memory leak in PQsetdb/PQfinish(Bryan) |
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Remove char2-16 data types, use char/varchar(Darren) |
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Pqfn not handles a NOTICE message(Anders) |
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Reduced busywaiting overhead for spinlocks with many backends (dg) |
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Stuck spinlock detection (dg) |
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Fix up "ISO-style" timespan decoding and encoding(Thomas) |
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Fix problem with table drop after rollback of transaction(Vadim) |
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Change error message and remove non-functional update message(Vadim) |
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Fix for COPY array checking |
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Fix for SELECT 1 UNION SELECT NULL |
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Fix for buffer leaks in large object calls(Pascal) |
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Change owner from oid to int4 type(Bruce) |
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Fix a bug in the oracle compatibility functions btrim() ltrim() and rtrim() |
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Fix for shared invalidation cache overflow(Massimo) |
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Prevent file descriptor leaks in failed COPY's(Bruce) |
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Fix memory leak in libpgtcl's pg_select(Constantin) |
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Fix problems with username/passwords over 8 characters(Tom) |
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Fix problems with handling of asynchronous NOTIFY in backend(Tom) |
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Fix of many bad system table entries(Tom) |
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|
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Enhancements |
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------------ |
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Upgrade ecpg and ecpglib,see src/interfaces/ecpc/ChangeLog(Michael) |
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Show the index used in an EXPLAIN(Zeugswetter) |
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EXPLAIN invokes rule system and shows plan(s) for rewritten queries(Jan) |
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Multi-byte awareness of many data types and functions, via configure(Tatsuo) |
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New configure --with-mb option(Tatsuo) |
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New initdb --pgencoding option(Tatsuo) |
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New createdb -E multibyte option(Tatsuo) |
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Select version(); now returns PostgreSQL version(Jeroen) |
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Libpq now allows asynchronous clients(Tom) |
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Allow cancel from client of backend query(Tom) |
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Psql now cancels query with Control-C(Tom) |
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Libpq users need not issue dummy queries to get NOTIFY messages(Tom) |
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NOTIFY now sends sender's PID, so you can tell whether it was your own(Tom) |
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PGresult struct now includes associated error message, if any(Tom) |
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Define "tz_hour" and "tz_minute" arguments to date_part()(Thomas) |
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Add routines to convert between varchar and bpchar(Thomas) |
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Add routines to allow sizing of varchar and bpchar into target columns(Thomas) |
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Add bit flags to support timezonehour and minute in data retrieval(Thomas) |
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Allow more variations on valid floating point numbers (e.g. ".1", "1e6")(Thomas) |
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Fixes for unary minus parsing with leading spaces(Thomas) |
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Implement TIMEZONE_HOUR, TIMEZONE_MINUTE per SQL92 specs(Thomas) |
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Check for and properly ignore FOREIGN KEY column constraints(Thomas) |
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Define USER as synonym for CURRENT_USER per SQL92 specs(Thomas) |
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Enable HAVING clause but no fixes elsewhere yet. |
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Make "char" type a synonym for "char(1)" (actually implemented as bpchar)(Thomas) |
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Save string type if specified for DEFAULT clause handling(Thomas) |
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Coerce operations involving different data types(Thomas) |
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Allow some index use for columns of different types(Thomas) |
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Add capabilities for automatic type conversion(Thomas) |
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Cleanups for large objects, so file is truncated on open(Peter) |
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Readline cleanups(Tom) |
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Allow psql \f \ to make spaces as delimiter(Bruce) |
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Pass pg_attribute.atttypmod to the frontend for column field lengths(Tom,Bruce) |
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Msql compatibility library in /contrib(Aldrin) |
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Remove the requirement that ORDER/GROUP BY clause identifiers be |
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included in the target list(David) |
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Convert columns to match columns in UNION clauses(Thomas) |
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Remove fork()/exec() and only do fork()(Bruce) |
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Jdbc cleanups(Peter) |
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Show backend status on ps command line(only works on some platforms)(Bruce) |
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Pg_hba.conf now has a sameuser option in the database field |
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Make lo_unlink take oid param, not int4 |
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New DISABLE_COMPLEX_MACRO for compilers that can't handle our macros(Bruce) |
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Libpgtcl now handles NOTIFY as a Tcl event, need not send dummy queries(Tom) |
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libpgtcl cleanups(Tom) |
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Add -error option to libpgtcl's pg_result command(Tom) |
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New locale patch, see docs/README/locale(Oleg) |
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Fix for pg_dump so CONSTRAINT and CHECK syntax is correct(ccb) |
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New contrib/lo code for large object orphan removal(Peter) |
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New psql command "SET CLIENT_ENCODING TO 'encoding'" for multi-bytes |
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feature, see /doc/README.mb(Tatsuo) |
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/contrib/noupdate code to revoke update permission on a column |
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Libpq can now be compiled on win32(Magnus) |
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Add PQsetdbLogin() in libpq |
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New 8-byte integer type, checked by configure for OS support(Thomas) |
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Better support for quoted table/column names(Thomas) |
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Surround table and column names with double-quotes in pg_dump(Thomas) |
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PQreset() now works with passwords(Tom) |
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Handle case of GROUP BY target list column number out of range(David) |
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Allow UNION in subselects |
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Add auto-size to screen to \d? commands(Bruce) |
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Use UNION to show all \d? results in one query(Bruce) |
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Add \d? field search feature(Bruce) |
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Pg_dump issues fewer \connect requests(Tom) |
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Make pg_dump -z flag work better, document it in manual page(Tom) |
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Add HAVING clause with full support for subselects and unions(Stephan) |
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Full text indexing routines in contrib/fulltextindex(Maarten) |
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Transaction ids now stored in shared memory(Vadim) |
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New PGCLIENTENCODING when issuing COPY command(Tatsuo) |
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Support for SQL92 syntax "SET NAMES"(Tatsuo) |
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Support for LATIN2-5(Tatsuo) |
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Add UNICODE regression test case(Tatsuo) |
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Lock manager cleanup, new locking modes for LLL(Vadim) |
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Allow index use with OR clauses(Bruce) |
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Allows "SELECT NULL ORDER BY 1;" |
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Explain VERBOSE prints the plan, and now pretty-prints the plan to |
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the postmaster log file(Bruce) |
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Add Indices display to \d command(Bruce) |
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Allow GROUP BY on functions(David) |
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New pg_class.relkind for large objects(Bruce) |
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New way to send libpq NOTICE messages to a different location(Tom) |
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New \w write command to psql(Bruce) |
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New /contrib/findoidjoins scans oid columns to find join relationships(Bruce) |
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Allow binary-compatible indices to be considered when checking for valid |
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indices for restriction clauses containing a constant(Thomas) |
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New ISBN/ISSN code in /contrib/isbn_issn |
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Allow NOT LIKE, IN, NOT IN, BETWEEN, and NOT BETWEEN constraint(Thomas) |
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New rewrite system fixes many problems with rules and views(Jan) |
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* Rules on relations work |
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* Event qualifications on insert/update/delete work |
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* New OLD variable to reference CURRENT, CURRENT will be remove in future |
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* Update rules can reference NEW and OLD in rule qualifications/actions |
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* Insert/update/delete rules on views work |
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* Multiple rule actions are now supported, surrounded by parentheses |
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* Regular users can create views/rules on tables they have RULE permits |
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* Rules and views inherit the permissions on the creator |
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* No rules at the column level |
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* No UPDATE NEW/OLD rules |
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* New pg_tables, pg_indexes, pg_rules and pg_views system views |
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* Only a single action on SELECT rules |
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* Total rewrite overhaul, perhaps for 6.5 |
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* handle subselects |
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* handle aggregates on views |
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* handle insert into select from view works |
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System indexes are now multi-key(Bruce) |
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Oidint2, oidint4, and oidname types are removed(Bruce) |
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Use system cache for more system table lookups(Bruce) |
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New backend programming language PL/pgSQL in backend/pl(Jan) |
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New SERIAL data type, auto-creates sequence/index(Thomas) |
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Enable assert checking without a recompile(Massimo) |
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User lock enhancements(Massimo) |
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New setval() command to set sequence value(Massimo) |
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Auto-remove unix socket file on startup if no postmaster running(Massimo) |
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Conditional trace package(Massimo) |
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New UNLISTEN command(Massimo) |
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Psql and libpq now compile under win32 using win32.mak(Magnus) |
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Lo_read no longer stores trailing NULL(Bruce) |
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Identifiers are now truncated to 31 characters internally(Bruce) |
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Createuser options now availble on the command line |
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Code for 64-bit integer supported added, configure tested, int8 type(Thomas) |
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Prevent file descriptor leaf from failed COPY(Bruce) |
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New pg_upgrade command(Bruce) |
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Updated /contrib directories(Massimo) |
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New CREATE TABLE DEFAULT VALUES statement available(Thomas) |
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New INSERT INTO TABLE DEFAULT VALUES statement available(Thomas) |
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New DECLARE and FETCH feature(Thomas) |
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libpq's internal structures now not exported(Tom) |
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Allow up to 8 key indexes(Bruce) |
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Remove ARCHIVE keyword, that is no longer used(Thomas) |
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pg_dump -n flag to supress quotes around indentifiers |
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disable system columns for views(Jan) |
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new INET and CIDR types for network addresses(TomH, Paul) |
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no more double quotes in psql output |
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pg_dump now dumps views(Terry) |
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new SET QUERY_LIMIT(Tatsuo,Jan) |
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|
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Source Tree Changes |
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------------------- |
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/contrib cleanup(Jun) |
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Inline some small functions called for every row(Bruce) |
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Alpha/linux fixes |
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Hp/UX cleanups(Tom) |
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Multi-byte regression tests(Soonmyung.) |
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Remove --disabled options from configure |
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Define PGDOC to use POSTGRESDIR by default |
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Make regression optional |
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Remove extra braces code to pgindent(Bruce) |
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Add bsdi shared library support(Bruce) |
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New --without-CXX support configure option(Brook) |
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New FAQ_CVS |
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Update backend flowchart in tools/backend(Bruce) |
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Change atttypmod from int16 to int32(Bruce, Tom) |
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Getrusage() fix for platforms that do not have it(Tom) |
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Add PQconnectdb, PGUSER, PGPASSWORD to libpq man page |
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NS32K platform fixes(Phil Nelson, John Buller) |
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Sco 7/UnixWare 2.x fixes(Billy,others) |
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Sparc/Solaris 2.5 fixes(Ryan) |
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Pgbuiltin.3 is obsolete, move to doc files(Thomas) |
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Even more documention(Thomas) |
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Nextstep support(Jacek) |
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Aix support(David) |
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pginterface manual page(Bruce) |
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shared libraries all have version numbers |
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merged all OS-specific shared library defines into one file |
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smarter TCL/TK configuration checking(Billy) |
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smarter perl configuration(Brook) |
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configure uses supplied install-sh if no install script found(Tom) |
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new Makefile.shlib for shared library configuration(Tom) |
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</programlisting> |
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</Para> |
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</sect2> |
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</Sect1> |
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|
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