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>Appendix E. Release Notes</TD
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>E.150. Release 8.1.19</A
></H1
><DIV
CLASS="FORMALPARA"
><P
><B
>Release date: </B
>2009-12-14</P
></DIV
><P
>   This release contains a variety of fixes from 8.1.18.
   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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>E.150.1. Migration to Version 8.1.19</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
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><H2
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><A
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>E.150.2. Changes</A
></H2
><P
></P
><UL
><LI
><P
>      Protect against indirect security threats caused by index functions
      changing session-local state (Gurjeet Singh, Tom)
     </P
><P
>      This change prevents allegedly-immutable index functions from possibly
      subverting a superuser's session (CVE-2009-4136).
     </P
></LI
><LI
><P
>      Reject SSL certificates containing an embedded null byte in the common
      name (CN) field (Magnus)
     </P
><P
>      This prevents unintended matching of a certificate to a server or client
      name during SSL validation (CVE-2009-4034).
     </P
></LI
><LI
><P
>      Fix possible crash during backend-startup-time cache initialization (Tom)
     </P
></LI
><LI
><P
>      Prevent signals from interrupting <TT
CLASS="LITERAL"
>VACUUM</TT
> at unsafe times
      (Alvaro)
     </P
><P
>      This fix prevents a PANIC if a <TT
CLASS="LITERAL"
>VACUUM FULL</TT
> is canceled
      after it's already committed its tuple movements, as well as transient
      errors if a plain <TT
CLASS="LITERAL"
>VACUUM</TT
> is interrupted after having
      truncated the table.
     </P
></LI
><LI
><P
>      Fix possible crash due to integer overflow in hash table size
      calculation (Tom)
     </P
><P
>      This could occur with extremely large planner estimates for the size of
      a hashjoin's result.
     </P
></LI
><LI
><P
>      Fix very rare crash in <TT
CLASS="TYPE"
>inet</TT
>/<TT
CLASS="TYPE"
>cidr</TT
> comparisons (Chris
      Mikkelson)
     </P
></LI
><LI
><P
>      Ensure that shared tuple-level locks held by prepared transactions are
      not ignored (Heikki)
     </P
></LI
><LI
><P
>      Fix premature drop of temporary files used for a cursor that is accessed
      within a subtransaction (Heikki)
     </P
></LI
><LI
><P
>      Fix PAM password processing to be more robust (Tom)
     </P
><P
>      The previous code is known to fail with the combination of the Linux
      <TT
CLASS="LITERAL"
>pam_krb5</TT
> PAM module with Microsoft Active Directory as the
      domain controller.  It might have problems elsewhere too, since it was
      making unjustified assumptions about what arguments the PAM stack would
      pass to it.
     </P
></LI
><LI
><P
>      Fix processing of ownership dependencies during <TT
CLASS="LITERAL"
>CREATE OR
      REPLACE FUNCTION</TT
> (Tom)
     </P
></LI
><LI
><P
>      Ensure that Perl arrays are properly converted to
      <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> arrays when returned by a set-returning
      PL/Perl function (Andrew Dunstan, Abhijit Menon-Sen)
     </P
><P
>      This worked correctly already for non-set-returning functions.
     </P
></LI
><LI
><P
>      Fix rare crash in exception processing in PL/Python (Peter)
     </P
></LI
><LI
><P
>      Ensure <SPAN
CLASS="APPLICATION"
>psql</SPAN
>'s flex module is compiled with the correct
      system header definitions (Tom)
     </P
><P
>      This fixes build failures on platforms where
      <TT
CLASS="LITERAL"
>--enable-largefile</TT
> causes incompatible changes in the
      generated code.
     </P
></LI
><LI
><P
>      Make the postmaster ignore any <TT
CLASS="LITERAL"
>application_name</TT
> parameter in
      connection request packets, to improve compatibility with future libpq
      versions (Tom)
     </P
></LI
><LI
><P
>      Update time zone data files to <SPAN
CLASS="APPLICATION"
>tzdata</SPAN
> release 2009s
      for DST law changes in Antarctica, Argentina, Bangladesh, Fiji,
      Novokuznetsk, Pakistan, Palestine, Samoa, Syria; also historical
      corrections for Hong Kong.
     </P
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