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Add KNNGIST support to contrib/btree_gist.

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This extends GiST's support for nearest-neighbor searches to many of the
standard data types.

Teodor Sigaev
This commit is contained in:
Tom Lane
2011-03-02 14:43:24 -05:00
parent 6094c242d1
commit 8436489c81
40 changed files with 1546 additions and 59 deletions
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39
contrib/btree_gist/btree_utils_num.h
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@ -40,24 +40,25 @@ typedef struct
/* Methods */
bool (*f_gt) (const void *, const void *); /* greater then */
bool (*f_ge) (const void *, const void *); /* greater equal */
bool (*f_gt) (const void *, const void *); /* greater than */
bool (*f_ge) (const void *, const void *); /* greater or equal */
bool (*f_eq) (const void *, const void *); /* equal */
bool (*f_le) (const void *, const void *); /* less equal */
bool (*f_lt) (const void *, const void *); /* less then */
bool (*f_le) (const void *, const void *); /* less or equal */
bool (*f_lt) (const void *, const void *); /* less than */
int (*f_cmp) (const void *, const void *); /* key compare function */
float8 (*f_dist) (const void *, const void *); /* 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; \
@ -91,11 +92,37 @@ typedef struct
(ivp)->month * (30.0 * SECS_PER_DAY))
#endif
#define GET_FLOAT_DISTANCE(t, arg1, arg2) Abs( ((float8) *((const t *) (arg1))) - ((float8) *((const t *) (arg2))) )
#define SAMESIGN(a,b) (((a) < 0) == ((b) < 0))
/*
* 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);
extern float8 gbt_num_distance(const GBT_NUMKEY_R *key, const void *query,
bool is_leaf, const gbtree_ninfo *tinfo);
extern GIST_SPLITVEC *gbt_num_picksplit(const GistEntryVector *entryvec, GIST_SPLITVEC *v,
const gbtree_ninfo *tinfo);