calc_length_hist_frac calc_period_hist_selectivity calc_period_hist_selectivity_adjacent calc_period_hist_selectivity_contained calc_period_hist_selectivity_contains calc_period_hist_selectivity_scalar calc_periodsel default_period_selectivity get_len_position get_period_distance get_period_position get_time_cachedop length_hist_bsearch period_rbound_bsearch periodsel

get_len_position() double get_len_position ( double  value, double  hist1, double  hist2  )