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/*
* contrib/btree_gist/btree_utils_num.h
*/
#ifndef __BTREE_UTILS_NUM_H__
#define __BTREE_UTILS_NUM_H__
#include <math.h>
#include <float.h>
#include "access/gist.h"
#include "btree_gist.h"
#include "utils/rel.h"
typedef char GBT_NUMKEY;
/* Better readable key */
typedef struct
{
const GBT_NUMKEY *lower,
*upper;
} GBT_NUMKEY_R;
/* for sorting */
typedef struct
{
int i;
GBT_NUMKEY *t;
} Nsrt;
/* type description */
typedef struct
{
/* Attribs */
enum gbtree_type t; /* data type */
int32 size; /* size of type, 0 means variable */
int32 indexsize; /* size of datums stored in index */
/* Methods */
bool (*f_gt) (const void *, const void *, FmgrInfo *); /* greater than */
bool (*f_ge) (const void *, const void *, FmgrInfo *); /* greater or equal */
bool (*f_eq) (const void *, const void *, FmgrInfo *); /* equal */
bool (*f_le) (const void *, const void *, FmgrInfo *); /* less or equal */
bool (*f_lt) (const void *, const void *, FmgrInfo *); /* less than */
int (*f_cmp) (const void *, const void *, FmgrInfo *); /* key compare function */
float8 (*f_dist) (const void *, const void *, FmgrInfo *); /* key distance function */
} gbtree_ninfo;
/*
* Numeric btree functions
*/
/*
* Note: The factor 0.49 in following macro avoids floating point overflows
*/
#define penalty_num(result,olower,oupper,nlower,nupper) do { \
double tmp = 0.0F; \
(*(result)) = 0.0F; \
if ( (nupper) > (oupper) ) \
tmp += ( ((double)nupper)*0.49F - ((double)oupper)*0.49F ); \
if ( (olower) > (nlower) ) \
tmp += ( ((double)olower)*0.49F - ((double)nlower)*0.49F ); \
if (tmp > 0.0F) \
{ \
(*(result)) += FLT_MIN; \
(*(result)) += (float) ( ((double)(tmp)) / ( (double)(tmp) + ( ((double)(oupper))*0.49F - ((double)(olower))*0.49F ) ) ); \
(*(result)) *= (FLT_MAX / (((GISTENTRY *) PG_GETARG_POINTER(0))->rel->rd_att->natts + 1)); \
} \
} while (0)
/*
* Convert an Interval to an approximate equivalent number of seconds
* (as a double). Here because we need it for time/timetz as well as
* interval. See interval_cmp_internal for comparison.
*/
#define INTERVAL_TO_SEC(ivp) \
(((double) (ivp)->time) / ((double) USECS_PER_SEC) + \
(ivp)->day * (24.0 * SECS_PER_HOUR) + \
(ivp)->month * (30.0 * SECS_PER_DAY))
#define GET_FLOAT_DISTANCE(t, arg1, arg2) Abs( ((float8) *((const t *) (arg1))) - ((float8) *((const t *) (arg2))) )
/*
* check to see if a float4/8 val has underflowed or overflowed
* borrowed from src/backend/utils/adt/float.c
*/
#define CHECKFLOATVAL(val, inf_is_valid, zero_is_valid) \
do { \
if (isinf(val) && !(inf_is_valid)) \
ereport(ERROR, \
(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE), \
errmsg("value out of range: overflow"))); \
\
if ((val) == 0.0 && !(zero_is_valid)) \
ereport(ERROR, \
(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE), \
errmsg("value out of range: underflow"))); \
} while(0)
extern Interval *abs_interval(Interval *a);
extern bool gbt_num_consistent(const GBT_NUMKEY_R *key, const void *query,
const StrategyNumber *strategy, bool is_leaf,
const gbtree_ninfo *tinfo, FmgrInfo *flinfo);
extern float8 gbt_num_distance(const GBT_NUMKEY_R *key, const void *query,
bool is_leaf, const gbtree_ninfo *tinfo, FmgrInfo *flinfo);
extern GIST_SPLITVEC *gbt_num_picksplit(const GistEntryVector *entryvec, GIST_SPLITVEC *v,
const gbtree_ninfo *tinfo, FmgrInfo *flinfo);
extern GISTENTRY *gbt_num_compress(GISTENTRY *entry, const gbtree_ninfo *tinfo);
extern GISTENTRY *gbt_num_fetch(GISTENTRY *entry, const gbtree_ninfo *tinfo);
extern void *gbt_num_union(GBT_NUMKEY *out, const GistEntryVector *entryvec,
const gbtree_ninfo *tinfo, FmgrInfo *flinfo);
extern bool gbt_num_same(const GBT_NUMKEY *a, const GBT_NUMKEY *b,
const gbtree_ninfo *tinfo, FmgrInfo *flinfo);
extern void gbt_num_bin_union(Datum *u, GBT_NUMKEY *e,
const gbtree_ninfo *tinfo, FmgrInfo *flinfo);
#endif
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