span_analyze.h

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#ifndef __SPAN_ANALYZE_H__
#define __SPAN_ANALYZE_H__
 
/* PostgreSQL */
#include <postgres.h>
#include <fmgr.h>
#include <commands/vacuum.h>
#include <statistics/extended_stats_internal.h>
/* MEOS */
#include "general/span.h"
 
/*
 * It is not possible to differentiate bound histogram of spans for the value
 * and the time dimension with the combination stakind/staop values and thus
 * it is necessary to define different stakind for each dimension even if the
 * values collected are of the same type
 */
#define STATISTIC_KIND_VALUE_BOUNDS_HISTOGRAM   8
#define STATISTIC_KIND_VALUE_LENGTH_HISTOGRAM   9
#define STATISTIC_KIND_TIME_BOUNDS_HISTOGRAM   10
#define STATISTIC_KIND_TIME_LENGTH_HISTOGRAM   11
 
/*****************************************************************************/
 
extern int float8_qsort_cmp(const void *a1, const void *a2);
 
extern void span_compute_stats_generic(VacAttrStats *stats, int non_null_cnt,
  int *slot_idx, SpanBound *lowers, SpanBound *uppers, float8 *lengths,
  bool valuedim);
extern Datum set_analyze(FunctionCallInfo fcinfo,
  void (*func)(VacAttrStats *, AnalyzeAttrFetchFunc, int, double));
 
/*****************************************************************************/
 
#endif