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><A
NAME="RELEASE-8-0-2"
>E.194. Release 8.0.2</A
></H1
><DIV
CLASS="FORMALPARA"
><P
><B
>Release date: </B
>2005-04-07</P
></DIV
><P
> This release contains a variety of fixes from 8.0.1.
For information about new features in the 8.0 major release, see
<A
HREF="release-8-0.html"
>Section E.196</A
>.
</P
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN139247"
>E.194.1. Migration to Version 8.0.2</A
></H2
><P
> A dump/restore is not required for those running 8.0.*.
This release updates the major version number of the
<SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> libraries, so it might be
necessary to re-link some user applications if they cannot
find the properly-numbered shared library.
</P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN139251"
>E.194.2. Changes</A
></H2
><P
></P
><UL
><LI
><P
>Increment the major version number of all interface
libraries (Bruce)</P
><P
>This should have been done in 8.0.0. It is required so 7.4.X versions
of PostgreSQL client applications, like <SPAN
CLASS="APPLICATION"
>psql</SPAN
>,
can be used on the same machine as 8.0.X applications. This might require
re-linking user applications that use these libraries.</P
></LI
><LI
><P
>Add Windows-only <TT
CLASS="VARNAME"
>wal_sync_method</TT
> setting of
<TT
CLASS="OPTION"
>fsync_writethrough</TT
> (Magnus, Bruce)</P
><P
>This setting causes <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> to write through
any disk-drive write cache when writing to WAL.
This behavior was formerly called <TT
CLASS="OPTION"
>fsync</TT
>, but was
renamed because it acts quite differently from <TT
CLASS="OPTION"
>fsync</TT
> on other
platforms.</P
></LI
><LI
><P
>Enable the <TT
CLASS="VARNAME"
>wal_sync_method</TT
> setting of
<TT
CLASS="OPTION"
>open_datasync</TT
> on Windows, and make it the default for that
platform (Magnus, Bruce)</P
><P
>Because the default is no longer <TT
CLASS="OPTION"
>fsync_writethrough</TT
>,
data loss is possible during a power failure if the disk drive has
write caching enabled. To turn off the write cache on Windows,
from the <SPAN
CLASS="APPLICATION"
>Device Manager</SPAN
>, choose the drive properties,
then <TT
CLASS="LITERAL"
>Policies</TT
>.</P
></LI
><LI
><P
>New cache management algorithm <ACRONYM
CLASS="ACRONYM"
>2Q</ACRONYM
> replaces
<ACRONYM
CLASS="ACRONYM"
>ARC</ACRONYM
> (Tom)</P
><P
>This was done to avoid a pending US patent on <ACRONYM
CLASS="ACRONYM"
>ARC</ACRONYM
>. The
<ACRONYM
CLASS="ACRONYM"
>2Q</ACRONYM
> code might be a few percentage points slower than
<ACRONYM
CLASS="ACRONYM"
>ARC</ACRONYM
> for some work loads. A better cache management algorithm
will appear in 8.1.</P
></LI
><LI
><P
>Planner adjustments to improve behavior on freshly-created
tables (Tom)</P
></LI
><LI
><P
>Allow plpgsql to assign to an element of an array that is
initially <TT
CLASS="LITERAL"
>NULL</TT
> (Tom)</P
><P
>Formerly the array would remain <TT
CLASS="LITERAL"
>NULL</TT
>, but now it becomes a
single-element array. The main SQL engine was changed to handle
<TT
CLASS="COMMAND"
>UPDATE</TT
> of a null array value this way in 8.0, but the similar
case in plpgsql was overlooked.</P
></LI
><LI
><P
>Convert <TT
CLASS="LITERAL"
>\r\n</TT
> and <TT
CLASS="LITERAL"
>\r</TT
> to <TT
CLASS="LITERAL"
>\n</TT
>
in plpython function bodies (Michael Fuhr)</P
><P
> This prevents syntax errors when plpython code is written on a Windows or
Mac client.</P
></LI
><LI
><P
>Allow SPI cursors to handle utility commands that return rows,
such as <TT
CLASS="COMMAND"
>EXPLAIN</TT
> (Tom)</P
></LI
><LI
><P
>Fix <TT
CLASS="COMMAND"
>CLUSTER</TT
> failure after <TT
CLASS="COMMAND"
>ALTER TABLE
SET WITHOUT OIDS</TT
> (Tom)</P
></LI
><LI
><P
>Reduce memory usage of <TT
CLASS="COMMAND"
>ALTER TABLE ADD COLUMN</TT
>
(Neil)</P
></LI
><LI
><P
>Fix <TT
CLASS="COMMAND"
>ALTER LANGUAGE RENAME</TT
> (Tom)</P
></LI
><LI
><P
>Document the Windows-only <TT
CLASS="LITERAL"
>register</TT
> and
<TT
CLASS="LITERAL"
>unregister</TT
> options of <SPAN
CLASS="APPLICATION"
>pg_ctl</SPAN
> (Magnus)</P
></LI
><LI
><P
>Ensure operations done during backend shutdown are counted by
statistics collector</P
><P
>This is expected to resolve reports of <SPAN
CLASS="APPLICATION"
>pg_autovacuum</SPAN
>
not vacuuming the system catalogs often enough — it was not being
told about catalog deletions caused by temporary table removal during
backend exit.</P
></LI
><LI
><P
>Change the Windows default for configuration parameter
<TT
CLASS="VARNAME"
>log_destination</TT
> to <TT
CLASS="OPTION"
>eventlog</TT
> (Magnus)</P
><P
>By default, a server running on Windows will now send log output to the
Windows event logger rather than standard error.</P
></LI
><LI
><P
>Make Kerberos authentication work on Windows (Magnus)</P
></LI
><LI
><P
>Allow <TT
CLASS="COMMAND"
>ALTER DATABASE RENAME</TT
> by superusers
who aren't flagged as having CREATEDB privilege (Tom)</P
></LI
><LI
><P
>Modify WAL log entries for <TT
CLASS="COMMAND"
>CREATE</TT
> and
<TT
CLASS="COMMAND"
>DROP DATABASE</TT
> to not specify absolute paths (Tom)</P
><P
>This allows point-in-time recovery on a different machine with possibly
different database location. Note that <TT
CLASS="COMMAND"
>CREATE TABLESPACE</TT
> still
poses a hazard in such situations.</P
></LI
><LI
><P
>Fix crash from a backend exiting with an open transaction
that created a table and opened a cursor on it (Tom)</P
></LI
><LI
><P
>Fix <CODE
CLASS="FUNCTION"
>array_map()</CODE
> so it can call PL functions
(Tom)</P
></LI
><LI
><P
>Several <TT
CLASS="FILENAME"
>contrib/tsearch2</TT
> and
<TT
CLASS="FILENAME"
>contrib/btree_gist</TT
> fixes (Teodor)</P
></LI
><LI
><P
>Fix crash of some <TT
CLASS="FILENAME"
>contrib/pgcrypto</TT
>
functions on some platforms (Marko Kreen)</P
></LI
><LI
><P
>Fix <TT
CLASS="FILENAME"
>contrib/intagg</TT
> for 64-bit platforms
(Tom)</P
></LI
><LI
><P
>Fix ecpg bugs in parsing of <TT
CLASS="COMMAND"
>CREATE</TT
> statement
(Michael)</P
></LI
><LI
><P
>Work around gcc bug on powerpc and amd64 causing problems in
ecpg (Christof Petig)</P
></LI
><LI
><P
>Do not use locale-aware versions of <CODE
CLASS="FUNCTION"
>upper()</CODE
>,
<CODE
CLASS="FUNCTION"
>lower()</CODE
>, and <CODE
CLASS="FUNCTION"
>initcap()</CODE
> when the locale is
<TT
CLASS="LITERAL"
>C</TT
> (Bruce)</P
><P
> This allows these functions to work on platforms that generate errors
for non-7-bit data when the locale is <TT
CLASS="LITERAL"
>C</TT
>.</P
></LI
><LI
><P
>Fix <CODE
CLASS="FUNCTION"
>quote_ident()</CODE
> to quote names that match keywords (Tom)</P
></LI
><LI
><P
>Fix <CODE
CLASS="FUNCTION"
>to_date()</CODE
> to behave reasonably when
<TT
CLASS="LITERAL"
>CC</TT
> and <TT
CLASS="LITERAL"
>YY</TT
> fields are both used (Karel)</P
></LI
><LI
><P
>Prevent <CODE
CLASS="FUNCTION"
>to_char(interval)</CODE
> from failing
when given a zero-month interval (Tom)</P
></LI
><LI
><P
>Fix wrong week returned by <CODE
CLASS="FUNCTION"
>date_trunc('week')</CODE
>
(Bruce)</P
><P
><CODE
CLASS="FUNCTION"
>date_trunc('week')</CODE
>
returned the wrong year for the first few days of January in some years.</P
></LI
><LI
><P
>Use the correct default mask length for class <TT
CLASS="LITERAL"
>D</TT
>
addresses in <TT
CLASS="TYPE"
>INET</TT
> data types (Tom)</P
></LI
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