tpoint_selfuncs.h

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/*****************************************************************************
 *
 * This MobilityDB code is provided under The PostgreSQL License.
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 * Copyright (c) 2016-2021, Université libre de Bruxelles and MobilityDB
 * contributors
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 * Permission to use, copy, modify, and distribute this software and its
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 *****************************************************************************/

#ifndef __TPOINT_SELFUNCS_H__
#define __TPOINT_SELFUNCS_H__

#include <postgres.h>
#include <catalog/pg_statistic.h>
#include <utils/selfuncs.h>

#include "general/tempcache.h"
#include "tpoint.h"
#include "tpoint_analyze.h"

#define X_DIM  0
#define Y_DIM  1
#define Z_DIM  2
#define T_DIM  3
#define ND_DIMS 4

/*****************************************************************************
 * Definitions copied from PostGIS file gserialized_estimate.c
 *****************************************************************************/

/*
* The SD factor restricts the side of the statistics histogram
* based on the standard deviation of the extent of the data.
* SDFACTOR is the number of standard deviations from the mean
* the histogram will extend.
*/
#define SDFACTOR 3.25

#define MIN_DIMENSION_WIDTH 0.000000001

#define STATISTIC_KIND_ND 102
#define STATISTIC_KIND_2D 103
#define STATISTIC_SLOT_ND 0
#define STATISTIC_SLOT_2D 1

#define FALLBACK_ND_SEL 0.2
#define FALLBACK_ND_JOINSEL 0.3

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

extern Datum tpoint_sel(PG_FUNCTION_ARGS);
extern Datum tpoint_joinsel(PG_FUNCTION_ARGS);

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

#endif