Preliminary release notes for 8.5alpha2
This commit is contained in:
Peter Eisentraut
parent
ef8df75e67
commit
7bd93589c8
@ -1,7 +1,7 @@
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<!-- $PostgreSQL: pgsql/doc/src/sgml/release-8.5.sgml,v 1.4 2009/08/19 08:18:48 petere Exp $ -->
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<!-- $PostgreSQL: pgsql/doc/src/sgml/release-8.5.sgml,v 1.5 2009/10/20 19:52:58 petere Exp $ -->
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<sect1 id="release-8.5">
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<title>Release 8.5alpha1</title>
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<sect1 id="release-8-5">
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<title>Release 8.5alpha2</title>
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<sect2>
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<title>Overview</title>
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<para>
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@ -32,6 +32,11 @@
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using those if you are looking for bug-fix-only upgrades for your
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current installations.
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</para>
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<para>
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The release notes are cumulative over all alpha releases. Items
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that are new in the latest alpha release
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are <emphasis>emphasized</emphasis>.
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</para>
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</sect2>
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<sect2>
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<title>Migration</title>
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@ -52,6 +57,68 @@
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<sect3>
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<title>SQL Features</title>
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<itemizedlist>
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<listitem override="box">
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<para>
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<emphasis>Modify the definition of window-function PARTITION
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BY and ORDER BY clauses so that their elements are always
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taken as simple expressions over the query's input
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columns.</>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Fix bug with WITH RECURSIVE immediately inside WITH
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RECURSIVE.</>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Define a new, more extensible syntax for COPY options.</>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Add ALTER DEFAULT PRIVILEGES command, which allows
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users to adjust the privileges that will be applied to
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subsequently-created objects.</>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Support use of function argument names to identify which
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actual arguments match which function parameters. The syntax
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uses AS, for example funcname(value AS arg1, anothervalue AS
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arg2).</>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Add CREATE LIKE INCLUDING COMMENTS and STORAGE, and INCLUDING
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ALL shortcut.</>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Add GRANT/REVOKE ON ALL TABLES/SEQUENCES/FUNCTIONS IN SCHEMA.</>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Add SQL-compliant triggers on columns, ie fire only if
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certain columns are named in the UPDATE's SET list.</>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Add surrogate pair support for U& string and identifier
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syntax.</>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Add Unicode escapes in E'...' strings.</>
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</para>
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</listitem>
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<listitem>
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<para>
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DROP COLUMN and DROP CONSTRAINT now support an IF EXISTS clause so
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@ -67,19 +134,19 @@
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</listitem>
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<listitem>
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<para>
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Allows parentheses around the query expression that follows a WITH
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Allow parentheses around the query expression that follows a WITH
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clause.
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</para>
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</listitem>
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<listitem>
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<para>
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INFORMATION_SCHEMA, a catalog of standard views of database
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objects, has been updated to the SQL:2008 ANSI/ISO standard.
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objects, has been updated to the SQL:2008 standard.
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</para>
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</listitem>
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<listitem>
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<para>
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Changes character_octet_length to more sensible values in
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Change character_octet_length to more sensible values in
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INFORMATION_SCHEMA.
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</para>
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</listitem>
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@ -94,6 +161,19 @@
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<sect3>
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<title>Performance</title>
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<itemizedlist>
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<listitem>
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<para>
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<emphasis>Make TRUNCATE do truncate-in-place when processing
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a relation that was created or previously truncated in the
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current (sub)transaction.</>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Implement "join removal" for cases where the inner side
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of a left join is unique and is not referenced above the join.</>
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</para>
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</listitem>
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<listitem>
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<para>
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EXPLAIN allows output of plans in XML or JSON format for automated
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@ -116,7 +196,7 @@
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</listitem>
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<listitem>
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<para>
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Makes GEQO's planning deterministic by having it start from a
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Make GEQO's planning deterministic by having it start from a
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predictable random number seed each time.
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</para>
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</listitem>
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@ -153,6 +233,31 @@
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<sect3>
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<title>Administration and Monitoring</title>
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<itemizedlist>
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<listitem>
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<para>
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<emphasis>Add a Boolean server configuration parameter
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"bonjour" to control whether a Bonjour-enabled
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build actually attempts to advertise itself via Bonjour.</>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>When reloading postgresql.conf, log what parameters actually
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changed.</>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Make it possibly to specify server configuration parameters
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per user and per database. psql has gained a drds command to
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display the settings.</>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Allow the collection of statistics on sequences.</>
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</para>
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</listitem>
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<listitem>
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<para>
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Add the ability to include the SQLSTATE error code of any error
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@ -169,9 +274,28 @@
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</listitem>
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</itemizedlist>
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</sect3>
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<sect3>
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<title>Server Configuration</title>
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<itemizedlist>
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<listitem>
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<para>
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<emphasis>Increase the maximum value of extra_float_digits to
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3, and have pg_dump use that value when the backend is new
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enough to allow it, because it is possible to need 3 extra
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digits for float4 values (but not for float8 values).</>
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</para>
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</listitem>
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</itemizedlist>
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</sect3>
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<sect3>
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<title>Security</title>
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<itemizedlist>
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<listitem>
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<para>
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<emphasis>Support "samehost" and "samenet" specifications
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in pg_hba.conf.</emphasis>
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</para>
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</listitem>
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<listitem>
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<para>
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New has_sequence_privilege() functions allow you to check sequence
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@ -183,6 +307,12 @@
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<sect3>
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<title>Built-In Functions</title>
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<itemizedlist>
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<listitem>
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<para>
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<emphasis>Support POSIX-compatible interpretation of ? as well as {m,n}
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and related constructs in SIMILAR TO, per SQL:2008.</>
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</para>
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</listitem>
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<listitem>
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<para>
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The to_char() formatting functions now supports EEEE (scientific
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@ -206,13 +336,24 @@
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</itemizedlist>
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</sect3>
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<sect3>
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<title>Datatypes</title>
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<title>Data Types</title>
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<itemizedlist>
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<listitem>
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<para>
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<emphasis>Fix encoding handling in binary input function of xml type.</>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Tighten binary receive functions so that they reject values
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that the text input functions don't accept either.</>
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</para>
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</listitem>
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<listitem>
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<para>
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New hex-string input and output format options for type BYTEA. Hex
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output format is enabled by default, which is an INCOMPATIBLE
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CHANGE. See the new bytea_output parameter if you need to restore
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New hex-string input and output format options for type bytea. Hex
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output format is enabled by default, which is an incompatible
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change. See the new bytea_output parameter if you need to restore
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compatibility.
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</para>
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</listitem>
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@ -227,14 +368,28 @@
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<sect3>
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<title>Server Tools</title>
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<itemizedlist>
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<listitem>
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<listitem>
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<para>
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<emphasis>It is now reasonably safe to use pg_ctl to start
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the postmaster from a boot-time script.</emphasis>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Remove the use of the flat files pg_auth and
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pg_database. (At least pgbouncer currently suggests referring
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to the pg_auth file for its user database. Such schemes will
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no longer work.)</emphasis>
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</para>
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</listitem>
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<listitem>
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<para>
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pg_dump/pg_restore --clean now drops large objects.
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</para>
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</listitem>
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<listitem>
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<para>
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Modifies parallel pg_restore ordering logic to avoid a potential
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Modify parallel pg_restore ordering logic to avoid a potential
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O(N^2) slowdown for some complex databases.
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</para>
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</listitem>
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@ -243,6 +398,21 @@
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<sect3>
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<title>psql</title>
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<itemizedlist>
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<listitem>
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<para>
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<emphasis>Implement significantly saner behavior when two or
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more psql sessions overlap in their use of the history file.</>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Add "pset linestyle ascii/unicode" option to psql,
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allowing our traditional ASCII-art style of table output to
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be upgraded to use Unicode box drawing characters if
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desired. By default, psql will use the Unicode characters
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whenever client_encoding is UTF8.</>
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</para>
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</listitem>
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<listitem>
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<para>
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Have \d show child tables that inherit from the specified parent
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@ -258,6 +428,52 @@
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<sect3>
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<title>Procedural Languages</title>
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<itemizedlist>
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<listitem>
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<para>
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<emphasis>Add DO statement to support execution of procedural language
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code without having to create a function for it.</>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Fix/improve bytea and boolean support in PL/Python. Data type
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conversion into and out of PL/Python previously went through
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an intermediate string representation, which caused various
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discrepancies especially with bytea and boolean data. This is
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now fixed by converting the values directly.</>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>PL/Python now accepts Unicode objects where it previously
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only accepted string objects (for example, as return
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value). Unicode objects are converted to the PostgreSQL
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server encoding as necessary.</>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Improve error context reporting in PL/Perl, for
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easier debugging.</>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Allow plpgsql IN parameters to be assigned to.</>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Convert a Perl array to a PostgreSQL array when returned by
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set-returning functions as well as non-SRFs.</>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Allow MOVE FORWARD n, MOVE BACKWARD n, MOVE FORWARD ALL, MOVE
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BACKWARD ALL in PL/pgSQL.</>
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</para>
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</listitem>
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<listitem>
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<para>
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PL/pgSQL functions can now better cope with row types
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@ -266,13 +482,13 @@
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</listitem>
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<listitem>
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<para>
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Improves error context reporting in PL/Python, for easier
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Improve error context reporting in PL/Python, for easier
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debugging.
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</para>
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</listitem>
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<listitem>
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<para>
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Greatly expands the regression testing for PL/Python.
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Greatly expand the regression testing for PL/Python.
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</para>
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</listitem>
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</itemizedlist>
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@ -280,6 +496,11 @@
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<sect3>
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<title>Additional Supplied Modules</title>
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<itemizedlist>
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<listitem>
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<para>
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<emphasis>Assorted improvements in contrib/hstore.</>
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</para>
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</listitem>
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<listitem>
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<para>
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pgbench is now multi-threaded, allowing it to use multiple CPU's
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@ -306,6 +527,27 @@
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</listitem>
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</itemizedlist>
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</sect3>
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<sect3>
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<title>Programming Tools</title>
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<itemizedlist>
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<listitem>
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<para>
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<emphasis>Add ECPG function that returns the current transaction status.</>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Make ECPG more robust against applications freeing strings.</>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Make libpq reject non-numeric and out-of-range port numbers with a
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suitable error message.</>
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</para>
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</listitem>
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</itemizedlist>
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</sect3>
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<sect3>
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<title>Development</title>
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<itemizedlist>
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@ -331,7 +573,33 @@
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<sect3>
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<title>Ports</title>
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<itemizedlist>
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<listitem>
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<listitem>
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<para>
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<emphasis>Change the WIN32 API version to be 5.01 (Windows XP), to
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bring in the proper IPv6 headers in newer SDKs.</>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Write to the Windows eventlog in UTF-16, converting the
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message encoding as necessary.</>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Replace use of the long-deprecated Bonjour API
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DNSServiceRegistrationCreate with the not-so-deprecated
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DNSServiceRegister. The new code will fail on Mac OS X
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releases before 10.3.</>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Install a hopefully-temporary workaround for Mac OS X Snow Leopard
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readdir() bug.</>
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</para>
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</listitem>
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<listitem>
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<para>
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Reserve the shared memory region during backend startup on Windows,
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so that memory allocated by starting third party DLLs doesn't end
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@ -350,6 +618,28 @@
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<sect3>
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<title>Source code, build options</title>
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<itemizedlist>
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<listitem>
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<para>
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<emphasis>Fix inclusions of readline/editline header files so that we
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only attempt to #include the version of history.h that is in
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the same directory as the readline.h we are using. This
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avoids problems in some scenarios where both readline and
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editline are installed.</>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Derived files that are shipped in the distribution used to be
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built in the source directory even for out-of-tree
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builds. They are now also built in the build tree. This
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should be more convenient for certain developers' workflows.</>
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</para>
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</listitem>
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<listitem>
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<para>
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<emphasis>Translations were updated.</>
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</para>
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</listitem>
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<listitem>
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<para>
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Upgrade to Autoconf 2.63 (not relevant to users of distribution
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@ -387,13 +677,6 @@
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will let it be used directly by PL/pgSQL.
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</para>
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</listitem>
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<listitem>
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<para>
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Fix backend startup to not depend on the flat-file copy of
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pg_database. This is a first step towards eliminating the flat
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files altogether.
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</para>
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</listitem>
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</itemizedlist>
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</sect3>
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</sect2>
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