Index: doc/src/sgml/ref/create_table.sgml
===================================================================
RCS file: /cvsroot/pgsql/doc/src/sgml/ref/create_table.sgml,v
retrieving revision 1.50
diff -c -r1.50 create_table.sgml
*** doc/src/sgml/ref/create_table.sgml	2001/12/08 03:24:35	1.50
--- doc/src/sgml/ref/create_table.sgml	2002/01/03 06:23:36
***************
*** 437,442 ****
--- 437,449 ----
         </varlistentry>
        </variablelist>
       </para>
+      <para>
+       If primary key column is updated frequently, it may be wise to
+       add an index to the <literal>REFERENCES</literal> column so that
+       <literal>NO ACTION</literal> and <literal>CASCADE</literal>
+       actions associated with the <literal>REFERENCES</literal>
+       column can be more efficiently performed.
+      </para>
  
      </listitem>
     </varlistentry>
***************
*** 472,477 ****
--- 479,486 ----
      </listitem>
     </varlistentry>
    </variablelist>
+ 
+ 
   </refsect1>