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