inter_span_span intersection_set_value intersection_span_value intersection_spanset_value minus_set_value minus_span_value minus_spanset_value minus_value_set minus_value_span minus_value_spanset union_set_value union_span_value union_spanset_value

minus_value_span() bool minus_value_span ( Datum  d, meosType  basetype, const Span *  s, Datum *  result  ) Return the difference of a value and a span.