f range types.
   GiST indexes can be also created for table columns of multirange types.
   For instance, to create a GiST index:
</p><pre class="programlisting">
CREATE INDEX reservation_idx ON reservation USING GIST (during);
</pre><p>
   A GiST or SP-GiST index on ranges can accelerate queries involving these
   range operators:
   <code class="literal">=</code>,
   <code class="literal">&amp;&amp;</code>,
   <code class="literal">&lt;@</code>,
   <code class="literal">@&gt;</code>,
   <code class="lite