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>Appendix E. Release Notes</TD
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><A
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>E.120. Release 8.3.1</A
></H1
><DIV
CLASS="FORMALPARA"
><P
><B
>Release date: </B
>2008-03-17</P
></DIV
><P
> This release contains a variety of fixes from 8.3.0.
For information about new features in the 8.3 major release, see
<A
HREF="release-8-3.html"
>Section E.121</A
>.
</P
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN131211"
>E.120.1. Migration to Version 8.3.1</A
></H2
><P
> A dump/restore is not required for those running 8.3.X.
However, you might need to <TT
CLASS="COMMAND"
>REINDEX</TT
> indexes on textual
columns after updating, if you are affected by the Windows locale
issue described below.
</P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN131215"
>E.120.2. Changes</A
></H2
><P
></P
><UL
><LI
><P
> Fix character string comparison for Windows locales that consider
different character combinations as equal (Tom)
</P
><P
> This fix applies only on Windows and only when using UTF-8
database encoding. The same fix was made for all other cases
over two years ago, but Windows with UTF-8 uses a separate code
path that was not updated. If you are using a locale that
considers some non-identical strings as equal, you may need to
<TT
CLASS="COMMAND"
>REINDEX</TT
> to fix existing indexes on textual columns.
</P
></LI
><LI
><P
> Repair corner-case bugs in <TT
CLASS="COMMAND"
>VACUUM FULL</TT
> (Tom)
</P
><P
> A potential deadlock between concurrent <TT
CLASS="COMMAND"
>VACUUM FULL</TT
>
operations on different system catalogs was introduced in 8.2.
This has now been corrected. 8.3 made this worse because the
deadlock could occur within a critical code section, making it
a PANIC rather than just ERROR condition.
</P
><P
> Also, a <TT
CLASS="COMMAND"
>VACUUM FULL</TT
> that failed partway through
vacuuming a system catalog could result in cache corruption in
concurrent database sessions.
</P
><P
> Another <TT
CLASS="COMMAND"
>VACUUM FULL</TT
> bug introduced in 8.3 could
result in a crash or out-of-memory report when dealing with
pages containing no live tuples.
</P
></LI
><LI
><P
> Fix misbehavior of foreign key checks involving <TT
CLASS="TYPE"
>character</TT
>
or <TT
CLASS="TYPE"
>bit</TT
> columns (Tom)
</P
><P
> If the referencing column were of a different but compatible type
(for instance <TT
CLASS="TYPE"
>varchar</TT
>), the constraint was enforced incorrectly.
</P
></LI
><LI
><P
> Avoid needless deadlock failures in no-op foreign-key checks (Stephan
Szabo, Tom)
</P
></LI
><LI
><P
> Fix possible core dump when re-planning a prepared query (Tom)
</P
><P
> This bug affected only protocol-level prepare operations, not
SQL <TT
CLASS="COMMAND"
>PREPARE</TT
>, and so tended to be seen only with
JDBC, DBI, and other client-side drivers that use prepared
statements heavily.
</P
></LI
><LI
><P
> Fix possible failure when re-planning a query that calls an SPI-using
function (Tom)
</P
></LI
><LI
><P
> Fix failure in row-wise comparisons involving columns of different
datatypes (Tom)
</P
></LI
><LI
><P
> Fix longstanding <TT
CLASS="COMMAND"
>LISTEN</TT
>/<TT
CLASS="COMMAND"
>NOTIFY</TT
>
race condition (Tom)
</P
><P
> In rare cases a session that had just executed a
<TT
CLASS="COMMAND"
>LISTEN</TT
> might not get a notification, even though
one would be expected because the concurrent transaction executing
<TT
CLASS="COMMAND"
>NOTIFY</TT
> was observed to commit later.
</P
><P
> A side effect of the fix is that a transaction that has executed
a not-yet-committed <TT
CLASS="COMMAND"
>LISTEN</TT
> command will not see any
row in <TT
CLASS="STRUCTNAME"
>pg_listener</TT
> for the <TT
CLASS="COMMAND"
>LISTEN</TT
>,
should it choose to look; formerly it would have. This behavior
was never documented one way or the other, but it is possible that
some applications depend on the old behavior.
</P
></LI
><LI
><P
> Disallow <TT
CLASS="COMMAND"
>LISTEN</TT
> and <TT
CLASS="COMMAND"
>UNLISTEN</TT
> within a
prepared transaction (Tom)
</P
><P
> This was formerly allowed but trying to do it had various unpleasant
consequences, notably that the originating backend could not exit
as long as an <TT
CLASS="COMMAND"
>UNLISTEN</TT
> remained uncommitted.
</P
></LI
><LI
><P
> Disallow dropping a temporary table within a
prepared transaction (Heikki)
</P
><P
> This was correctly disallowed by 8.1, but the check was inadvertently
broken in 8.2 and 8.3.
</P
></LI
><LI
><P
> Fix rare crash when an error occurs during a query using a hash index
(Heikki)
</P
></LI
><LI
><P
> Fix incorrect comparison of <TT
CLASS="TYPE"
>tsquery</TT
> values (Teodor)
</P
></LI
><LI
><P
> Fix incorrect behavior of <TT
CLASS="LITERAL"
>LIKE</TT
> with non-ASCII characters
in single-byte encodings (Rolf Jentsch)
</P
></LI
><LI
><P
> Disable <CODE
CLASS="FUNCTION"
>xmlvalidate</CODE
> (Tom)
</P
><P
> This function should have been removed before 8.3 release, but
was inadvertently left in the source code. It poses a small
security risk since unprivileged users could use it to read the
first few characters of any file accessible to the server.
</P
></LI
><LI
><P
> Fix memory leaks in certain usages of set-returning functions (Neil)
</P
></LI
><LI
><P
> Make <CODE
CLASS="FUNCTION"
>encode(<TT
CLASS="REPLACEABLE"
><I
>bytea</I
></TT
>, 'escape')</CODE
> convert all
high-bit-set byte values into <TT
CLASS="LITERAL"
>\</TT
><TT
CLASS="REPLACEABLE"
><I
>nnn</I
></TT
> octal
escape sequences (Tom)
</P
><P
> This is necessary to avoid encoding problems when the database
encoding is multi-byte. This change could pose compatibility issues
for applications that are expecting specific results from
<CODE
CLASS="FUNCTION"
>encode</CODE
>.
</P
></LI
><LI
><P
> Fix input of datetime values for February 29 in years BC (Tom)
</P
><P
> The former coding was mistaken about which years were leap years.
</P
></LI
><LI
><P
> Fix <SPAN
CLASS="QUOTE"
>"unrecognized node type"</SPAN
> error in some variants of
<TT
CLASS="COMMAND"
>ALTER OWNER</TT
> (Tom)
</P
></LI
><LI
><P
> Avoid tablespace permissions errors in <TT
CLASS="COMMAND"
>CREATE TABLE LIKE
INCLUDING INDEXES</TT
> (Tom)
</P
></LI
><LI
><P
> Ensure <TT
CLASS="STRUCTNAME"
>pg_stat_activity</TT
>.<TT
CLASS="STRUCTFIELD"
>waiting</TT
> flag
is cleared when a lock wait is aborted (Tom)
</P
></LI
><LI
><P
> Fix handling of process permissions on Windows Vista (Dave, Magnus)
</P
><P
> In particular, this fix allows starting the server as the Administrator
user.
</P
></LI
><LI
><P
> Update time zone data files to <SPAN
CLASS="APPLICATION"
>tzdata</SPAN
> release 2008a
(in particular, recent Chile changes); adjust timezone abbreviation
<TT
CLASS="LITERAL"
>VET</TT
> (Venezuela) to mean UTC-4:30, not UTC-4:00 (Tom)
</P
></LI
><LI
><P
> Fix <SPAN
CLASS="APPLICATION"
>ecpg</SPAN
> problems with arrays (Michael)
</P
></LI
><LI
><P
> Fix <SPAN
CLASS="APPLICATION"
>pg_ctl</SPAN
> to correctly extract the postmaster's port
number from command-line options (Itagaki Takahiro, Tom)
</P
><P
> Previously, <TT
CLASS="LITERAL"
>pg_ctl start -w</TT
> could try to contact the
postmaster on the wrong port, leading to bogus reports of startup
failure.
</P
></LI
><LI
><P
> Use <TT
CLASS="OPTION"
>-fwrapv</TT
> to defend against possible misoptimization
in recent <SPAN
CLASS="APPLICATION"
>gcc</SPAN
> versions (Tom)
</P
><P
> This is known to be necessary when building <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
>
with <SPAN
CLASS="APPLICATION"
>gcc</SPAN
> 4.3 or later.
</P
></LI
><LI
><P
> Enable building <TT
CLASS="FILENAME"
>contrib/uuid-ossp</TT
> with MSVC (Hiroshi Saito)
</P
></LI
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