/code></em></span></dt><dd><p>
      The index method's support function number for a
      function associated with the operator family.
     </p></dd><dt><span class="term"><em class="replaceable"><code>function_name</code></em></span></dt><dd><p>
      The name (optionally schema-qualified) of a function that is an index
      method support function for the operator family.  If no argument list
      is specified, the name must be unique in its schema.
     </p></dd><dt><span class="term"><em class="rep