Index: doc/src/sgml/xfunc.sgml
===================================================================
RCS file: /cvsroot/pgsql/doc/src/sgml/xfunc.sgml,v
retrieving revision 1.109
diff -c -c -r1.109 xfunc.sgml
*** doc/src/sgml/xfunc.sgml	29 Nov 2005 01:46:54 -0000	1.109
--- doc/src/sgml/xfunc.sgml	19 Jan 2006 22:43:58 -0000
***************
*** 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>