DEFAULT_ND_JOINSEL DEFAULT_ND_SEL FALLBACK_ND_JOINSEL FALLBACK_ND_SEL geo_joinsel geo_sel MIN_DIMENSION_WIDTH ND_DIMS pg_get_nd_stats pg_nd_stats_from_tuple SDFACTOR STATISTIC_KIND_2D STATISTIC_KIND_ND STATISTIC_SLOT_2D STATISTIC_SLOT_ND T_DIM X_DIM Y_DIM Z_DIM

geo_sel() float8 geo_sel ( VariableStatData *  vardata, const STBox *  box, meosOper  oper  ) Return an estimate of the selectivity of a spatiotemporal search box by looking at data in the ND_STATS structure. The selectivity is a float in [0,1] that estimates the proportion of the rows in the table that will be returned as a result of the search box. To get our estimate, we need sum up the values * the proportion of each cell in the histogram that satisfies the operator wrt the search box, then divide by the number of features that generated the histogram. Note This function generalizes PostGIS function estimate_selectivity in file gserialized_estimate.c