distance_set_set distance_set_value distance_span_span distance_span_value distance_spanset_span distance_spanset_spanset distance_spanset_value distance_value_value

distance_spanset_spanset() Datum distance_spanset_spanset ( const SpanSet *  ss1, const SpanSet *  ss2  ) Return the distance between two span sets. Parameters [in] ss1,ss2 Span sets Returns On error return -1.0 @csqlfn Distance_spanset_span()