cmp_int gbox_ndims gserialized_compute_stats MAX_DIMENSION_WIDTH MIN_DIMENSION_WIDTH nd_box_array_distribution nd_box_expand nd_box_from_gbox nd_box_init nd_box_init_bounds nd_box_intersects nd_box_merge nd_box_overlap nd_box_ratio_overlaps nd_increment nd_stats_value_index NUM_BINS range_quintile SDFACTOR Spatialset_analyze spatialset_compute_stats STATISTIC_KIND_2D STATISTIC_KIND_ND STATISTIC_SLOT_2D STATISTIC_SLOT_ND total_double Tspatial_analyze tspatial_compute_stats

gserialized_compute_stats() void gserialized_compute_stats ( VacAttrStats *  stats, AnalyzeAttrFetchFunc  fetchfunc, int  sample_rows, double  total_rows, int  mode  ) Function gserialized_analyze_nd sets this function as a callback on the stats object when called by the ANALYZE command. ANALYZE then gathers the requisite number of sample rows and then calls this function. We could also pass stats->extra_data in from gserialized_analyze_nd (things like the column type or other stuff from the system catalogs) but so far we don't use that capability. Our job is to build some statistics on the sample data for use by operator estimators. We will populate an n-d histogram using the provided sample rows. The selectivity estimators (sel and j_oinsel) can then use the histogram