_mobdb_span_joinsel _mobdb_span_sel calc_length_hist_frac get_len_position length_hist_bsearch span_bound_bsearch span_bound_distance span_const_to_span Span_joinsel span_joinsel span_joinsel_default span_joinsel_hist span_joinsel_hist1 span_joinsel_oper span_joinsel_scalar span_position Span_sel span_sel span_sel_contained span_sel_contains span_sel_default span_sel_hist span_sel_hist1 span_sel_overlaps span_sel_scalar time_oper_sel value_oper_sel

calc_length_hist_frac() double calc_length_hist_frac ( Datum *  hist_length, int  hist_length_nvalues, double  length1, double  length2, bool  equal  ) Calculate the average of function P(x), in the interval [length1, length2], where P(x) is the fraction of tuples with length < x (or length <= x if 'equal' is true) Note Function derived from PostgreSQL file rangetypes_selfuncs.c.