Index: xfunc.sgml
===================================================================
RCS file: /cvsroot/pgsql/doc/src/sgml/xfunc.sgml,v
retrieving revision 1.109
retrieving revision 1.110
diff -c -c -r1.109 -r1.110
*** xfunc.sgml	29 Nov 2005 01:46:54 -0000	1.109
--- xfunc.sgml	19 Jan 2006 22:52:08 -0000	1.110
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*** 1,5 ****
  <!--
! $PostgreSQL: pgsql/doc/src/sgml/xfunc.sgml,v 1.109 2005/11/29 01:46:54 alvherre Exp $
  -->
  
   <sect1 id="xfunc">
--- 1,5 ----
  <!--
! $PostgreSQL: pgsql/doc/src/sgml/xfunc.sgml,v 1.110 2006/01/19 22:52:08 momjian Exp $
  -->
  
   <sect1 id="xfunc">
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*** 899,911 ****
       <para>
        A <literal>STABLE</> function cannot modify the database and is
        guaranteed to return the same results given the same arguments
!       for all calls within a single surrounding query.  This category
!       allows the optimizer to optimize away multiple calls of the function
!       within a single query.  In particular, it is safe to use an expression
!       containing such a function in an index scan condition.  (Since an
!       index scan will evaluate the comparison value only once, not once at
!       each row, it is not valid to use a <literal>VOLATILE</> function in
!       an index scan condition.)
       </para>
      </listitem>
      <listitem>
--- 899,911 ----
       <para>
        A <literal>STABLE</> function cannot modify the database and is
        guaranteed to return the same results given the same arguments
!       for all rows within a single statement. This category allows the
!       optimizer to optimize multiple calls of the function to a single
!       call. In particular, it is safe to use an expression containing
!       such a function in an index scan condition. (Since an index scan
!       will evaluate the comparison value only once, not once at each
!       row, it is not valid to use a <literal>VOLATILE</> function in an
!       index scan condition.)
       </para>
      </listitem>
      <listitem>