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>Appendix E. Release Notes</TD
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>E.163. Release 8.1.6</A
></H1
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><P
><B
>Release date: </B
>2007-01-08</P
></DIV
><P
>   This release contains a variety of fixes from 8.1.5.
   For information about new features in the 8.1 major release, see
   <A
HREF="release-8-1.html"
>Section E.169</A
>.
  </P
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><H2
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><A
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>E.163.1. Migration to Version 8.1.6</A
></H2
><P
>    A dump/restore is not required for those running 8.1.X.
    However, if you are upgrading from a version earlier than 8.1.2,
    see <A
HREF="release-8-1-2.html"
>Section E.167</A
>.
   </P
></DIV
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><H2
CLASS="SECT2"
><A
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>E.163.2. Changes</A
></H2
><P
></P
><UL
><LI
><P
>      Improve handling of <CODE
CLASS="FUNCTION"
>getaddrinfo()</CODE
> on AIX (Tom)
     </P
><P
>      This fixes a problem with starting the statistics collector,
      among other things.
     </P
></LI
><LI
><P
>      Fix <SPAN
CLASS="APPLICATION"
>pg_restore</SPAN
> to handle a tar-format backup
      that contains large objects (blobs) with comments (Tom)
     </P
></LI
><LI
><P
>       Fix <SPAN
CLASS="QUOTE"
>"failed to re-find parent key"</SPAN
> errors in
       <TT
CLASS="COMMAND"
>VACUUM</TT
> (Tom)
      </P
></LI
><LI
><P
>       Clean out <TT
CLASS="FILENAME"
>pg_internal.init</TT
> cache files during server
       restart (Simon)
      </P
><P
>       This avoids a hazard that the cache files might contain stale
       data after PITR recovery.
      </P
></LI
><LI
><P
>       Fix race condition for truncation of a large relation across a
       gigabyte boundary by <TT
CLASS="COMMAND"
>VACUUM</TT
> (Tom)
      </P
></LI
><LI
><P
>       Fix bug causing needless deadlock errors on row-level locks (Tom)
      </P
></LI
><LI
><P
>       Fix bugs affecting multi-gigabyte hash indexes (Tom)
      </P
></LI
><LI
><P
>      Fix possible deadlock in Windows signal handling (Teodor)
     </P
></LI
><LI
><P
>      Fix error when constructing an <TT
CLASS="LITERAL"
>ARRAY[]</TT
> made up of multiple
      empty elements (Tom)
     </P
></LI
><LI
><P
>      Fix ecpg memory leak during connection (Michael)
     </P
></LI
><LI
><P
>      Fix for Darwin (OS X) compilation (Tom)
     </P
></LI
><LI
><P
>      <CODE
CLASS="FUNCTION"
>to_number()</CODE
> and <CODE
CLASS="FUNCTION"
>to_char(numeric)</CODE
>
      are now <TT
CLASS="LITERAL"
>STABLE</TT
>, not <TT
CLASS="LITERAL"
>IMMUTABLE</TT
>, for
      new <SPAN
CLASS="APPLICATION"
>initdb</SPAN
> installs (Tom)
     </P
><P
>      This is because <TT
CLASS="VARNAME"
>lc_numeric</TT
> can potentially
      change the output of these functions.
     </P
></LI
><LI
><P
>      Improve index usage of regular expressions that use parentheses (Tom)
     </P
><P
>      This improves <SPAN
CLASS="APPLICATION"
>psql</SPAN
> <TT
CLASS="LITERAL"
>\d</TT
> performance also.
     </P
></LI
><LI
><P
>      Update timezone database
     </P
><P
>      This affects Australian and Canadian daylight-savings rules in
      particular.
     </P
></LI
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