nd difference that take
   multirange parameters and return a multirange, and they do not fail even if
   their arguments are disjoint. So if you need a union or difference operation
   for ranges that may be disjoint, you can avoid errors by first casting your
   ranges to multiranges.
  </p><p>
   <a class="xref" href="functions-range.html#RANGE-FUNCTIONS-TABLE" title="Table 9.57. Range Functions">Table 9.57</a> shows the functions
   available for use with range types.
   <a class="xref" href="functio