time_analyze.h

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/*****************************************************************************
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 * This MobilityDB code is provided under The PostgreSQL License.
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#ifndef __TIME_ANALYZE_H__
#define __TIME_ANALYZE_H__

#include <postgres.h>
#include <fmgr.h>
#include <catalog/pg_type.h>
#include <commands/vacuum.h>

#include "period.h"

/*
 * It is not possible to differentiate bound histogram of ranges and of periods
 * with the combinination stakind/staop values, since the staop is not set by
 * the compute_range_stats function and thus it is necessary to define a new stakind
 */
#define STATISTIC_KIND_PERIOD_BOUNDS_HISTOGRAM  8
/*
 * It is not possible to differentiate lengths of ranges and lengths of periods
 * with the combinination stakind/staop values, since the lenghts are expressed
 * with float8 values and thus it is necessary to define a new stakind
 */
#define STATISTIC_KIND_PERIOD_LENGTH_HISTOGRAM  9

/*****************************************************************************/

extern int period_bound_qsort_cmp(const void *a1, const void *a2);
extern int float8_qsort_cmp(const void *a1, const void *a2);
extern void period_compute_stats1(VacAttrStats *stats, int non_null_cnt, int *slot_idx,
  PeriodBound *lowers, PeriodBound *uppers, float8 *lengths);

extern Datum period_analyze(PG_FUNCTION_ARGS);
extern Datum timestampset_analyze(PG_FUNCTION_ARGS);
extern Datum periodset_analyze(PG_FUNCTION_ARGS);

/*****************************************************************************/

#endif