Distance_set_set Distance_set_value Distance_span_span Distance_span_spanset Distance_span_value Distance_spanset_span Distance_spanset_spanset Distance_spanset_value Distance_value_set Distance_value_span Distance_value_spanset Distance_value_value

Distance_span_span() Datum Distance_span_span ( PG_FUNCTION_ARGS  ) Return the distance between two spans @sqlfn span_distance() SQL Operator: <->