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><A
NAME="RELEASE-8-4-3"
>E.94. Release 8.4.3</A
></H1
><DIV
CLASS="FORMALPARA"
><P
><B
>Release date: </B
>2010-03-15</P
></DIV
><P
>   This release contains a variety of fixes from 8.4.2.
   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="AEN126939"
>E.94.1. Migration to Version 8.4.3</A
></H2
><P
>    A dump/restore is not required for those running 8.4.X.
    However, if you are upgrading from a version earlier than 8.4.2,
    see <A
HREF="release-8-4-2.html"
>Section E.95</A
>.
   </P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN126943"
>E.94.2. 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 deadlock during backend startup (Tom)
     </P
></LI
><LI
><P
>      Fix possible crashes due to not handling errors during relcache reload
      cleanly (Tom)
     </P
></LI
><LI
><P
>      Fix possible crash due to use of dangling pointer to a cached plan
      (Tatsuo)
     </P
></LI
><LI
><P
>      Fix possible crash due to overenthusiastic invalidation of cached
      plan for <TT
CLASS="COMMAND"
>ROLLBACK</TT
> (Tom)
     </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
>      Fix incorrect WAL data emitted during end-of-recovery cleanup of a GIST
      index page split (Yoichi Hirai)
     </P
><P
>      This would result in index corruption, or even more likely an error
      during WAL replay, if we were unlucky enough to crash during
      end-of-recovery cleanup after having completed an incomplete GIST
      insertion.
     </P
></LI
><LI
><P
>      Fix bug in WAL redo cleanup method for GIN indexes (Heikki)
     </P
></LI
><LI
><P
>      Fix incorrect comparison of scan key in GIN index search (Teodor)
     </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 bug occurring when trying to inline a SQL function that returns
      a set of a composite type that contains dropped columns (Tom)
     </P
></LI
><LI
><P
>      Fix bug with trying to update a field of an element of a
      composite-type array column (Tom)
     </P
></LI
><LI
><P
>      Avoid failure when <TT
CLASS="COMMAND"
>EXPLAIN</TT
> has to print a FieldStore or
      assignment ArrayRef expression (Tom)
     </P
><P
>      These cases can arise now that <TT
CLASS="COMMAND"
>EXPLAIN VERBOSE</TT
> tries to
      print plan node target lists.
     </P
></LI
><LI
><P
>      Avoid an unnecessary coercion failure in some cases where an undecorated
      literal string appears in a subquery within
      <TT
CLASS="COMMAND"
>UNION</TT
>/<TT
CLASS="COMMAND"
>INTERSECT</TT
>/<TT
CLASS="COMMAND"
>EXCEPT</TT
> (Tom)
     </P
><P
>      This fixes a regression for some cases that worked before 8.4.
     </P
></LI
><LI
><P
>      Avoid undesirable rowtype compatibility check failures in some cases
      where a whole-row Var has a rowtype that contains dropped columns (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
>      Always pass the catalog ID to an option validator function specified in
      <TT
CLASS="COMMAND"
>CREATE FOREIGN DATA WRAPPER</TT
> (Martin Pihlak)
     </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
>      Add support for doing <TT
CLASS="LITERAL"
>FULL JOIN ON FALSE</TT
> (Tom)
     </P
><P
>      This prevents a regression from pre-8.4 releases for some queries that
      can now be simplified to a constant-false join condition.
     </P
></LI
><LI
><P
>      Improve constraint exclusion processing of boolean-variable cases,
      in particular make it possible to exclude a partition that has a
      <SPAN
CLASS="QUOTE"
>"bool_column = false"</SPAN
> constraint (Tom)
     </P
></LI
><LI
><P
>      Prevent treating an <TT
CLASS="LITERAL"
>INOUT</TT
> cast as representing binary
      compatibility (Heikki)
     </P
></LI
><LI
><P
>      Include column name in the message when warning about inability to
      grant or revoke column-level privileges (Stephen Frost)
     </P
><P
>      This is more useful than before and helps to prevent confusion when
      a <TT
CLASS="COMMAND"
>REVOKE</TT
> generates multiple messages, which formerly
      appeared to be duplicates.
     </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 possible infinite loop if <CODE
CLASS="FUNCTION"
>SSL_read</CODE
> or
      <CODE
CLASS="FUNCTION"
>SSL_write</CODE
> fails without setting <TT
CLASS="VARNAME"
>errno</TT
> (Tom)
     </P
><P
>      This is reportedly possible with some Windows versions of
      <SPAN
CLASS="APPLICATION"
>openssl</SPAN
>.
     </P
></LI
><LI
><P
>      Disallow <ACRONYM
CLASS="ACRONYM"
>GSSAPI</ACRONYM
> authentication on local connections,
      since it requires a hostname to function correctly (Magnus)
     </P
></LI
><LI
><P
>      Protect <SPAN
CLASS="APPLICATION"
>ecpg</SPAN
> against applications freeing strings
      unexpectedly (Michael)
     </P
></LI
><LI
><P
>      Make <SPAN
CLASS="APPLICATION"
>ecpg</SPAN
> report the proper SQLSTATE if the connection
      disappears (Michael)
     </P
></LI
><LI
><P
>      Fix translation of cell contents in <SPAN
CLASS="APPLICATION"
>psql</SPAN
> <TT
CLASS="LITERAL"
>\d</TT
>
      output (Heikki)
     </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 a small per-query memory leak in <SPAN
CLASS="APPLICATION"
>psql</SPAN
> (Tom)
     </P
></LI
><LI
><P
>      Make <SPAN
CLASS="APPLICATION"
>psql</SPAN
> return the correct exit status (3) when
      <TT
CLASS="LITERAL"
>ON_ERROR_STOP</TT
> and <TT
CLASS="LITERAL"
>--single-transaction</TT
> are
      both specified and an error occurs during the implied <TT
CLASS="COMMAND"
>COMMIT</TT
>
      (Bruce)
     </P
></LI
><LI
><P
>      Fix <SPAN
CLASS="APPLICATION"
>pg_dump</SPAN
>'s output of permissions for foreign servers
      (Heikki)
     </P
></LI
><LI
><P
>      Fix possible crash in parallel <SPAN
CLASS="APPLICATION"
>pg_restore</SPAN
> due to
      out-of-range dependency IDs (Tom)
     </P
></LI
><LI
><P
>      Fix plpgsql failure in one case where a composite column is set to NULL
      (Tom)
     </P
></LI
><LI
><P
>      Fix possible failure when calling PL/Perl functions from PL/PerlU
      or vice versa (Tim Bunce)
     </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 <CODE
CLASS="FUNCTION"
>ExecutorEnd</CODE
> from being run on portals created
      within a failed transaction or subtransaction (Tom)
     </P
><P
>      This is known to cause issues when using
      <TT
CLASS="FILENAME"
>contrib/auto_explain</TT
>.
     </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
>      Allow zero-dimensional arrays in <TT
CLASS="FILENAME"
>contrib/ltree</TT
> operations
      (Tom)
     </P
><P
>      This case was formerly rejected as an error, but it's more convenient to
      treat it the same as a zero-element array.  In particular this avoids
      unnecessary failures when an <TT
CLASS="TYPE"
>ltree</TT
> operation is applied to the
      result of <TT
CLASS="LITERAL"
>ARRAY(SELECT ...)</TT
> and the sub-select returns no
      rows.
     </P
></LI
><LI
><P
>      Fix assorted crashes in <TT
CLASS="FILENAME"
>contrib/xml2</TT
> caused by sloppy
      memory management (Tom)
     </P
></LI
><LI
><P
>      Make building of <TT
CLASS="FILENAME"
>contrib/xml2</TT
> more robust on Windows
      (Andrew)
     </P
></LI
><LI
><P
>      Fix race condition in Windows signal handling (Radu Ilie)
     </P
><P
>      One known symptom of this bug is that rows in <TT
CLASS="STRUCTNAME"
>pg_listener</TT
>
      could be dropped under heavy load.
     </P
></LI
><LI
><P
>      Make the configure script report failure if the C compiler does
      not provide a working 64-bit integer datatype (Tom)
     </P
><P
>      This case has been broken for some time, and no longer seems worth
      supporting, so just reject it at configure time instead.
     </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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