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>E.149. Release 8.1.20</A
></H1
><DIV
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><P
><B
>Release date: </B
>2010-03-15</P
></DIV
><P
>   This release contains a variety of fixes from 8.1.19.
   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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><A
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>E.149.1. Migration to Version 8.1.20</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 8.1.18,
    see <A
HREF="release-8-1-18.html"
>Section E.151</A
>.
   </P
></DIV
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><H2
CLASS="SECT2"
><A
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>E.149.2. Changes</A
></H2
><P
></P
><UL
><LI
><P
>      Add new configuration parameter <TT
CLASS="VARNAME"
>ssl_renegotiation_limit</TT
> to
      control how often we do session key renegotiation for an SSL connection
      (Magnus)
     </P
><P
>      This can be set to zero to disable renegotiation completely, which may
      be required if a broken SSL library is used.  In particular, some
      vendors are shipping stopgap patches for CVE-2009-3555 that cause
      renegotiation attempts to fail.
     </P
></LI
><LI
><P
>      Fix possible crashes when trying to recover from a failure in
      subtransaction start (Tom)
     </P
></LI
><LI
><P
>      Fix server memory leak associated with use of savepoints and a client
      encoding different from server's encoding (Tom)
     </P
></LI
><LI
><P
>      Make <CODE
CLASS="FUNCTION"
>substring()</CODE
> for <TT
CLASS="TYPE"
>bit</TT
> types treat any negative
      length as meaning <SPAN
CLASS="QUOTE"
>"all the rest of the string"</SPAN
> (Tom)
     </P
><P
>      The previous coding treated only -1 that way, and would produce an
      invalid result value for other negative values, possibly leading to
      a crash (CVE-2010-0442).
     </P
></LI
><LI
><P
>      Fix integer-to-bit-string conversions to handle the first fractional
      byte correctly when the output bit width is wider than the given
      integer by something other than a multiple of 8 bits (Tom)
     </P
></LI
><LI
><P
>      Fix some cases of pathologically slow regular expression matching (Tom)
     </P
></LI
><LI
><P
>      Fix the <TT
CLASS="LITERAL"
>STOP WAL LOCATION</TT
> entry in backup history files to
      report the next WAL segment's name when the end location is exactly at a
      segment boundary (Itagaki Takahiro)
     </P
></LI
><LI
><P
>      Fix some more cases of temporary-file leakage (Heikki)
     </P
><P
>      This corrects a problem introduced in the previous minor release.
      One case that failed is when a plpgsql function returning set is
      called within another function's exception handler.
     </P
></LI
><LI
><P
>      When reading <TT
CLASS="FILENAME"
>pg_hba.conf</TT
> and related files, do not treat
      <TT
CLASS="LITERAL"
>@something</TT
> as a file inclusion request if the <TT
CLASS="LITERAL"
>@</TT
>
      appears inside quote marks; also, never treat <TT
CLASS="LITERAL"
>@</TT
> by itself
      as a file inclusion request (Tom)
     </P
><P
>      This prevents erratic behavior if a role or database name starts with
      <TT
CLASS="LITERAL"
>@</TT
>.  If you need to include a file whose path name
      contains spaces, you can still do so, but you must write
      <TT
CLASS="LITERAL"
>@"/path to/file"</TT
> rather than putting the quotes around
      the whole construct.
     </P
></LI
><LI
><P
>      Prevent infinite loop on some platforms if a directory is named as
      an inclusion target in <TT
CLASS="FILENAME"
>pg_hba.conf</TT
> and related files
      (Tom)
     </P
></LI
><LI
><P
>      Fix <SPAN
CLASS="APPLICATION"
>psql</SPAN
>'s <TT
CLASS="LITERAL"
>numericlocale</TT
> option to not
      format strings it shouldn't in latex and troff output formats (Heikki)
     </P
></LI
><LI
><P
>      Fix plpgsql failure in one case where a composite column is set to NULL
      (Tom)
     </P
></LI
><LI
><P
>      Add <TT
CLASS="LITERAL"
>volatile</TT
> markings in PL/Python to avoid possible
      compiler-specific misbehavior (Zdenek Kotala)
     </P
></LI
><LI
><P
>      Ensure PL/Tcl initializes the Tcl interpreter fully (Tom)
     </P
><P
>      The only known symptom of this oversight is that the Tcl
      <TT
CLASS="LITERAL"
>clock</TT
> command misbehaves if using Tcl 8.5 or later.
     </P
></LI
><LI
><P
>      Prevent crash in <TT
CLASS="FILENAME"
>contrib/dblink</TT
> when too many key
      columns are specified to a <CODE
CLASS="FUNCTION"
>dblink_build_sql_*</CODE
> function
      (Rushabh Lathia, Joe Conway)
     </P
></LI
><LI
><P
>      Fix assorted crashes in <TT
CLASS="FILENAME"
>contrib/xml2</TT
> caused by sloppy
      memory management (Tom)
     </P
></LI
><LI
><P
>      Update time zone data files to <SPAN
CLASS="APPLICATION"
>tzdata</SPAN
> release 2010e
      for DST law changes in Bangladesh, Chile, Fiji, Mexico, Paraguay, Samoa.
     </P
></LI
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