calc_hist_selectivity calc_hist_selectivity_contained calc_hist_selectivity_contains calc_hist_selectivity_scalar default_tnumber_selectivity get_distance get_position rbound_bsearch tnumber_cachedop tnumber_cachedop_rangeop tnumber_const_to_tbox tnumber_joinsel tnumber_sel tnumber_sel_internal

calc_hist_selectivity_contains() static double calc_hist_selectivity_contains ( TypeCacheEntry *  typcache, RangeBound *  lower, RangeBound *  upper, RangeBound *  hist_lower, int  hist_nvalues, Datum *  length_hist_values, int  length_hist_nvalues  ) static Calculate selectivity of "var @> const" operator, ie. estimate the fraction of ranges that contain the constant lower and upper bounds. This uses the histograms of range lower bounds and range lengths, on the assumption that the range lengths are independent of the lower bounds. Note, this is "var @> const", ie. estimate the fraction of ranges that contain the constant lower and upper bounds. Note Function copied from rangetypes_selfuncs.c since it is not exported.