float8_qsort_cmp set_analyze span_compute_stats_generic STATISTIC_KIND_TIME_BOUNDS_HISTOGRAM STATISTIC_KIND_TIME_LENGTH_HISTOGRAM STATISTIC_KIND_VALUE_BOUNDS_HISTOGRAM STATISTIC_KIND_VALUE_LENGTH_HISTOGRAM

float8_qsort_cmp() int float8_qsort_cmp ( const void *  a1, const void *  a2  ) Functions for gathering statistics from time type columns. These functions are based on those of the file rangetypes_typanalyze.c. For a span type column, histograms of lower and upper bounds, and the fraction of NULL spans are collected. Both histograms have the same length, and they are combined into a single array of spans. This has the same shape as the histogram that std_typanalyze would collect, but the values are different. Each span in the array is a valid span, even though the lower and upper bounds come from different tuples. In theory, the standard scalar selectivity functions could be used with the combined histogram. Comparison function for sorting float8 values, used for span lengths