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>E.80. Release 8.4.17</A
></H1
><DIV
CLASS="FORMALPARA"
><P
><B
>Release date: </B
>2013-04-04</P
></DIV
><P
> This release contains a variety of fixes from 8.4.16.
For information about new features in the 8.4 major release, see
<A
HREF="release-8-4.html"
>Section E.97</A
>.
</P
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN125343"
>E.80.1. Migration to Version 8.4.17</A
></H2
><P
> A dump/restore is not required for those running 8.4.X.
</P
><P
> However, this release corrects several errors in management of GiST
indexes. After installing this update, it is advisable to
<TT
CLASS="COMMAND"
>REINDEX</TT
> any GiST indexes that meet one or more of the
conditions described below.
</P
><P
> Also, if you are upgrading from a version earlier than 8.4.10,
see <A
HREF="release-8-4-10.html"
>Section E.87</A
>.
</P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN125350"
>E.80.2. Changes</A
></H2
><P
></P
><UL
><LI
><P
> Reset OpenSSL randomness state in each postmaster child process
(Marko Kreen)
</P
><P
> This avoids a scenario wherein random numbers generated by
<TT
CLASS="FILENAME"
>contrib/pgcrypto</TT
> functions might be relatively easy for
another database user to guess. The risk is only significant when
the postmaster is configured with <TT
CLASS="VARNAME"
>ssl</TT
> = <TT
CLASS="LITERAL"
>on</TT
>
but most connections don't use SSL encryption. (CVE-2013-1900)
</P
></LI
><LI
><P
> Fix GiST indexes to not use <SPAN
CLASS="QUOTE"
>"fuzzy"</SPAN
> geometric comparisons when
it's not appropriate to do so (Alexander Korotkov)
</P
><P
> The core geometric types perform comparisons using <SPAN
CLASS="QUOTE"
>"fuzzy"</SPAN
>
equality, but <CODE
CLASS="FUNCTION"
>gist_box_same</CODE
> must do exact comparisons,
else GiST indexes using it might become inconsistent. After installing
this update, users should <TT
CLASS="COMMAND"
>REINDEX</TT
> any GiST indexes on
<TT
CLASS="TYPE"
>box</TT
>, <TT
CLASS="TYPE"
>polygon</TT
>, <TT
CLASS="TYPE"
>circle</TT
>, or <TT
CLASS="TYPE"
>point</TT
>
columns, since all of these use <CODE
CLASS="FUNCTION"
>gist_box_same</CODE
>.
</P
></LI
><LI
><P
> Fix erroneous range-union and penalty logic in GiST indexes that use
<TT
CLASS="FILENAME"
>contrib/btree_gist</TT
> for variable-width data types, that is
<TT
CLASS="TYPE"
>text</TT
>, <TT
CLASS="TYPE"
>bytea</TT
>, <TT
CLASS="TYPE"
>bit</TT
>, and <TT
CLASS="TYPE"
>numeric</TT
>
columns (Tom Lane)
</P
><P
> These errors could result in inconsistent indexes in which some keys
that are present would not be found by searches, and also in useless
index bloat. Users are advised to <TT
CLASS="COMMAND"
>REINDEX</TT
> such indexes
after installing this update.
</P
></LI
><LI
><P
> Fix bugs in GiST page splitting code for multi-column indexes
(Tom Lane)
</P
><P
> These errors could result in inconsistent indexes in which some keys
that are present would not be found by searches, and also in indexes
that are unnecessarily inefficient to search. Users are advised to
<TT
CLASS="COMMAND"
>REINDEX</TT
> multi-column GiST indexes after installing this
update.
</P
></LI
><LI
><P
> Fix infinite-loop risk in regular expression compilation (Tom Lane,
Don Porter)
</P
></LI
><LI
><P
> Fix potential null-pointer dereference in regular expression compilation
(Tom Lane)
</P
></LI
><LI
><P
> Fix <CODE
CLASS="FUNCTION"
>to_char()</CODE
> to use ASCII-only case-folding rules where
appropriate (Tom Lane)
</P
><P
> This fixes misbehavior of some template patterns that should be
locale-independent, but mishandled <SPAN
CLASS="QUOTE"
>"<TT
CLASS="LITERAL"
>I</TT
>"</SPAN
> and
<SPAN
CLASS="QUOTE"
>"<TT
CLASS="LITERAL"
>i</TT
>"</SPAN
> in Turkish locales.
</P
></LI
><LI
><P
> Fix unwanted rejection of timestamp <TT
CLASS="LITERAL"
>1999-12-31 24:00:00</TT
>
(Tom Lane)
</P
></LI
><LI
><P
> Remove useless <SPAN
CLASS="QUOTE"
>"picksplit doesn't support secondary split"</SPAN
> log
messages (Josh Hansen, Tom Lane)
</P
><P
> This message seems to have been added in expectation of code that was
never written, and probably never will be, since GiST's default
handling of secondary splits is actually pretty good. So stop nagging
end users about it.
</P
></LI
><LI
><P
> Fix possible failure to send a session's last few transaction
commit/abort counts to the statistics collector (Tom Lane)
</P
></LI
><LI
><P
> Eliminate memory leaks in PL/Perl's <CODE
CLASS="FUNCTION"
>spi_prepare()</CODE
> function
(Alex Hunsaker, Tom Lane)
</P
></LI
><LI
><P
> Fix <SPAN
CLASS="APPLICATION"
>pg_dumpall</SPAN
> to handle database names containing
<SPAN
CLASS="QUOTE"
>"<TT
CLASS="LITERAL"
>=</TT
>"</SPAN
> correctly (Heikki Linnakangas)
</P
></LI
><LI
><P
> Avoid crash in <SPAN
CLASS="APPLICATION"
>pg_dump</SPAN
> when an incorrect connection
string is given (Heikki Linnakangas)
</P
></LI
><LI
><P
> Ignore invalid indexes in <SPAN
CLASS="APPLICATION"
>pg_dump</SPAN
> (Michael Paquier)
</P
><P
> Dumping invalid indexes can cause problems at restore time, for example
if the reason the index creation failed was because it tried to enforce
a uniqueness condition not satisfied by the table's data. Also, if the
index creation is in fact still in progress, it seems reasonable to
consider it to be an uncommitted DDL change, which
<SPAN
CLASS="APPLICATION"
>pg_dump</SPAN
> wouldn't be expected to dump anyway.
</P
></LI
><LI
><P
> Fix <TT
CLASS="FILENAME"
>contrib/pg_trgm</TT
>'s <CODE
CLASS="FUNCTION"
>similarity()</CODE
> function
to return zero for trigram-less strings (Tom Lane)
</P
><P
> Previously it returned <TT
CLASS="LITERAL"
>NaN</TT
> due to internal division by zero.
</P
></LI
><LI
><P
> Update time zone data files to <SPAN
CLASS="APPLICATION"
>tzdata</SPAN
> release 2013b
for DST law changes in Chile, Haiti, Morocco, Paraguay, and some
Russian areas. Also, historical zone data corrections for numerous
places.
</P
><P
> Also, update the time zone abbreviation files for recent changes in
Russia and elsewhere: <TT
CLASS="LITERAL"
>CHOT</TT
>, <TT
CLASS="LITERAL"
>GET</TT
>,
<TT
CLASS="LITERAL"
>IRKT</TT
>, <TT
CLASS="LITERAL"
>KGT</TT
>, <TT
CLASS="LITERAL"
>KRAT</TT
>, <TT
CLASS="LITERAL"
>MAGT</TT
>,
<TT
CLASS="LITERAL"
>MAWT</TT
>, <TT
CLASS="LITERAL"
>MSK</TT
>, <TT
CLASS="LITERAL"
>NOVT</TT
>, <TT
CLASS="LITERAL"
>OMST</TT
>,
<TT
CLASS="LITERAL"
>TKT</TT
>, <TT
CLASS="LITERAL"
>VLAT</TT
>, <TT
CLASS="LITERAL"
>WST</TT
>, <TT
CLASS="LITERAL"
>YAKT</TT
>,
<TT
CLASS="LITERAL"
>YEKT</TT
> now follow their current meanings, and
<TT
CLASS="LITERAL"
>VOLT</TT
> (Europe/Volgograd) and <TT
CLASS="LITERAL"
>MIST</TT
>
(Antarctica/Macquarie) are added to the default abbreviations list.
</P
></LI
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