mirrors/postgres
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

9.0 release notes updates.

Browse Source 
Josh Berkus
This commit is contained in:
Bruce Momjian 2010-06-16 18:31:39 +00:00
parent 3659c62350
commit a7b592722a
1 changed files with 46 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

53
doc/src/sgml/release-9.0.sgml
View File

@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/release-9.0.sgml,v 2.32 2010/06/16 14:50:34 adunstan Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/release-9.0.sgml,v 2.33 2010/06/16 18:31:39 momjian Exp $ -->
<sect1 id="release-9-0">
<title>Release 9.0</title>
@ -108,7 +108,7 @@
Add support for compiling on <link
linkend="install-win32-full">64-bit
<productname>Windows</></link> and running in 64-bit
mode
mode.
</para>
</listitem>
@ -133,13 +133,17 @@
<para>CURRENT AS OF 2010-06-03</para>
<para>
A dump/restore using <application>pg_dump</application> is
required for those wishing to migrate data from any previous
A dump/restore using <application>pg_dump</application>
or use of <application>pg_upgrade</application> is required
for those wishing to migrate data from any previous
release.
</para>
<para>
Observe the following incompatibilities:
Version 9.0 contains a number of changes which selectively break backwards compatibility
in order to support new features and code quality improvements. Particularly, users
who make extensive use of PL/pgSQL and/or PITR and Warm Standby should test their
solutions for breakage. Observe the following incompatibilities:
</para>
<sect3>
@ -488,6 +492,12 @@
linkend="guc-geqo-seed">geqo_seed</link> to randomize
the starting value of the random plan generator.
</para>
<para>
This gives GEQO query response times and resource usage
repeatability and predictability.
</para>
</listitem>
<listitem>
@ -623,6 +633,11 @@
name</link>, which is displayed in
<structname>pg_stat_activity</> (Dave Page)
</para>
<para>
This allows DBAs to characterize database traffic
and troubleshoot problems by source application.
</para>
</listitem>
<listitem>
@ -688,7 +703,11 @@
in the new <structname>pg_db_role_setting</> system table. A new
<application>psql</> <literal>\drds</> command shows these settings.
Backwards-compatible system views do not show this information.
The primary use of this feature is setting schema
<link linkend="guc-search-path"><varname>search_path</varname></link>.
</para>
</listitem>
<listitem>
@ -722,6 +741,12 @@
Log changed parameter values when <filename>postgresql.conf</> is
reloaded (Peter Eisentraut)
</para>
<para>
This lets DBAs and security staff to audit when database settings
were changed.
</para>
</listitem>
<listitem>
@ -794,6 +819,12 @@
(Boszormenyi Zoltan)
</para>
<para>
For drivers which support this feature, this saves an entire
round-trip to the client, allowing result counts and pagination
to be calculated without a second <command>COUNT</command> query.
</para>
<para>
<application>psql</> does not display these counts.
</para>
@ -909,7 +940,7 @@
<para>
Such operations either complete fully or are rolled back, so
<acronym>WAL</> archiving can be skipped, unless running in continuous
archiving mode.
archiving mode. This reduces I/O overhead and improves performance.
</para>
</listitem>
@ -1274,6 +1305,13 @@
<function>PQescapeByteaConn()</> now uses the hex format
for <productname>PostgreSQL</> 9.0 servers.
</para>
<para>
The new hex format will be directly compatible with more applications
which use binary data, allowing them to store and retrieve
it without conversion.
</para>
</listitem>
<listitem>
@ -1417,7 +1455,8 @@
<para>
For example, this is now supported, <literal>array_agg(a ORDER BY
b)</>. This is useful for aggregates where the order of values is
significant.
significant, and eliminates the need to have a subquery for
the ordering.
</para>
</listitem>