DatumGetSpanP DatumGetSpanSetP PG_GETARG_SPAN_P PG_GETARG_SPANSET_P PG_RETURN_SPAN_P PG_RETURN_SPANSET_P span_bound_cmp span_bound_qsort_cmp span_bounds span_deserialize span_lower_cmp span_serialize span_to_wkb_buf span_to_wkb_size span_upper_cmp spanarr_normalize SpanPGetDatum SpanSetPGetDatum

span_serialize() Span * span_serialize ( SpanBound *  lower, SpanBound *  upper  )