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REL8_1_STABLE
Bruce Momjian 21 years ago
parent f9989dae88
commit 2a49282477
1 changed files with 86 additions and 55 deletions
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  1. 141
      doc/src/sgml/release.sgml

141
doc/src/sgml/release.sgml
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@ -1,5 +1,5 @@
<!--
$PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.338 2005/08/23 02:57:07 momjian Exp $
$PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.339 2005/08/23 11:32:33 momjian Exp $
-->
<appendix id="release">
@ -36,7 +36,7 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.338 2005/08/23 02:57:07 momjian
</sect2>
<sect2>
<title>Migration to version 8.0</title>
<title>Migration to version 8.1</title>
<para>
A dump/restore using <application>pg_dump</application> is
@ -56,6 +56,16 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.338 2005/08/23 02:57:07 momjian
<itemizedlist>
<listitem>
<para>
Change add_missing_from to 'false'
</para>
<para>
Generate an error if a table used in a query without a FROM reference (Neil)
No more SELECT pg_class.*;
</para>
</listitem>
<listitem>
<para>
Cause input of a zero-length string ('') for float4/float8/oid to throw
@ -67,6 +77,21 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.338 2005/08/23 02:57:07 momjian
</para>
</listitem>
<listitem>
<para>
Make default_with_oids default to false (Neil)
</para>
<para>
With this option set to false, user-created tables no
have an the usually-invisible OID column unless WITH OIDS
is specified in CREATE TABLE. Though OIDs have existed in all previous
releases of PostgreSQL, their use is limited because they are only four
bytes long and the counter is unique across all installed databases.
The preferred way of uniquely identifying rows is via sequences and
SERIAL, which has been supported since PostgreSQL 6.4.
</para>
</listitem>
<listitem>
<para>
In psql, treat unquoted \{digit}+ sequences as octal (Bruce)
@ -146,7 +171,7 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.338 2005/08/23 02:57:07 momjian
</para>
<para>
In previous releases, the only way to use index for MIN/MAX was to rewrite
the query as SELECT col FROM tab ORDER BY col LIMIT 1. This not happens
the query as SELECT col FROM tab ORDER BY col LIMIT 1. This now happens
automatically.
</para>
</listitem>
@ -157,7 +182,8 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.338 2005/08/23 02:57:07 momjian
single query (Tom)
</para>
<para>
Multiple AND and ORs
This allows multiple indexes to be combined to access a single
table.
</para>
</listitem>
@ -165,7 +191,17 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.338 2005/08/23 02:57:07 momjian
<para>
Change WAL CRC records from 64bit to 32bit to improve performance
(Tom)
</para>
</listitem>
<listitem>
<para>
Prevent writing large empty gaps in WAL pages (Tom)
</para>
</listitem>
<listitem>
<para>
Allow non-consecutive index columns to be used in a multi-column index
(Tom)
</para>
@ -188,13 +224,18 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.338 2005/08/23 02:57:07 momjian
<listitem>
<para>
Allow concurrent GIST index access, greatly improving performance
(Teodor)
(Teodor, Oleg)
</para>
</listitem>
<listitem>
<para>
Add GUC full_page_writes to control writing full pages to WAL (Bruce)
</para>
<para>
To prevent partial disk writes from corrupting the database,
PostgreSQL writes a complete copy of each database disk page to WAL
the first time it is modified after a checkpoint. This turns of that
the first time it is modified after a checkpoint. This turns off that
functionality for users with battery-backed disk caches where partial
page writes can not happen.
</para>
@ -221,7 +262,11 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.338 2005/08/23 02:57:07 momjian
<para>
O_DIRECT causes disk writes to bypass the kernel cache, and for WAL
writes, this improves performance.
</para>
</listitem>
<listitem>
<para>
Improve COPY FROM performance (Alon Goldshuv)
</para>
<para>
@ -267,6 +312,11 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.338 2005/08/23 02:57:07 momjian
<listitem>
<para>
Add session start time and client IP address to pg_stat_activity (Magnus)
</para>
</listitem>
<listitem>
<para>
Enhance pg_locks display (Tom)
</para>
</listitem>
@ -293,7 +343,7 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.338 2005/08/23 02:57:07 momjian
<listitem>
<para>
Add WAL logging for GIST indexes (Teodor)
Add WAL logging for GIST indexes (Teodor, Oleg)
</para>
<para>
GIST indexes now work for online backup and crash recovery
@ -315,9 +365,6 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.338 2005/08/23 02:57:07 momjian
<para>
Remove old *.backup files when we do pg_stop_backup() (Bruce)
</para>
</listitem>
<listitem>
<para>
This prevents a large number of *.backup files from existing in
pg_xlog/.
@ -391,16 +438,6 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.338 2005/08/23 02:57:07 momjian
</para>
</listitem>
<listitem>
<para>
Change add_missing_from to 'false'
</para>
<para>
Generate an error if a table used in a query without a FROM reference (Neil)
No more SELECT pg_class.*;
</para>
</listitem>
<listitem>
<para>
Add support for \x hex escapes in backend and ecpg strings (Bruce)
@ -488,21 +525,6 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.338 2005/08/23 02:57:07 momjian
<title>Object Manipulation Changes</title>
<itemizedlist>
<listitem>
<para>
Make default_with_oids default to false (Neil)
</para>
<para>
With this option set to false, user-created tables no
have an the usually-invisible OID column unless WITH OIDS
is specified in CREATE TABLE. Though OIDs have existed in all previous
releases of PostgreSQL, their use is limited because they are only four
bytes long and the counter is unique across all installed databases.
The preferred way of uniquely identifying rows is via sequences and
SERIAL, which has been supported since PostgreSQL 6.4.
</para>
</listitem>
<listitem>
<para>
Track dependencies of shared objects (Alvaro)
@ -567,7 +589,7 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.338 2005/08/23 02:57:07 momjian
</para>
<para>
In release 8.0, carriage returns and line feeds in CSV COPY TO were
not processed in a inconsitent manner. (This was documented on the TODO
processed in an inconsistent manner. (This was documented on the TODO
list.)
</para>
</listitem>
@ -641,13 +663,13 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.338 2005/08/23 02:57:07 momjian
to use "postgres" rather than "template1" for standard lookups (Dave)
</para>
<para>
In prior releases, template1 was used both as a default connection for
things like createuser, and as a template for new databases. This
caused CREATE DATABASE to sometimes fail because a new database can
not be created if anyone else is in the template database. With this
change, the default connection database is now 'postgres', meaning is
is much less likely someone will be using template1 during CREATE
DATABASE.
In prior releases, template1 was used both as a default
connection for utilities like createuser, and as a template for
new databases. This caused CREATE DATABASE to sometimes fail
because a new database cannot be created if anyone else is in
the template database. With this change, the default connection
database is now 'postgres', meaning it is much less likely
someone will be using template1 during CREATE DATABASE.
</para>
</listitem>
@ -812,7 +834,11 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.338 2005/08/23 02:57:07 momjian
This allows regular expression replacement, like sed. A four-argument
version also allows for global (replace all) and case-insensitive
modes.
</para>
</listitem>
<listitem>
<para>
Fix interval division and multiplication (Bruce)
</para>
<para>
@ -851,15 +877,10 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.338 2005/08/23 02:57:07 momjian
<listitem>
<para>
Move /contrib/dbsize into the backend, and rename some of the functions
(Dave Page)
(Dave Page, Andreas Pflug)
</para>
<para>
The new functions are:
</para>
</listitem>
<listitem>
<para>
pg_tablespace_size()
pg_database_size()
pg_relation_size()
@ -1090,14 +1111,24 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.338 2005/08/23 02:57:07 momjian
<sect3>
<title>PL/Perl Server-Side Language Changes</title>
<itemizedlist>
<listitem>
<para>
Allow large result sets to be returned efficiently (Abhijit Menon-Sen)
</para>
<para>
This allows functions to use return_next() to avoid building
the entire result set in memory.
</para>
</listitem>
<listitem>
<para>
Allow the return large result sets (Abhijit Menon-Sen)
Allow one-row-at-a-time retrieval of query results (Abhijit)
</para>
<para>
This allows PL/Perl to use spi_query(), spi_fetchrow(), and
return_next() to return one row at a time from the function.
This allows functions to use spi_query() and spi_fetchrow() to
avoid accumulating the entire result set in memory.
</para>
</listitem>

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