/p></dd><dt><span class="term"><em class="replaceable"><code>operator_name</code></em></span></dt><dd><p>
      The name (optionally schema-qualified) of an operator associated
      with the operator family.
     </p></dd><dt><span class="term"><em class="replaceable"><code>op_type</code></em></span></dt><dd><p>
      In an <code class="literal">OPERATOR</code> clause,
      the operand data type(s) of the operator, or <code class="literal">NONE</code> to
      signify a prefix operator.  Unlike the compar