diff options
Diffstat (limited to '')
| -rw-r--r-- | contrib/btree_gist/btree_float8.c | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/contrib/btree_gist/btree_float8.c b/contrib/btree_gist/btree_float8.c new file mode 100644 index 0000000..10a5262 --- /dev/null +++ b/contrib/btree_gist/btree_float8.c @@ -0,0 +1,218 @@ +/* + * contrib/btree_gist/btree_float8.c + */ +#include "postgres.h" + +#include "btree_gist.h" +#include "btree_utils_num.h" + +typedef struct float8key +{ + float8 lower; + float8 upper; +} float8KEY; + +/* +** float8 ops +*/ +PG_FUNCTION_INFO_V1(gbt_float8_compress); +PG_FUNCTION_INFO_V1(gbt_float8_fetch); +PG_FUNCTION_INFO_V1(gbt_float8_union); +PG_FUNCTION_INFO_V1(gbt_float8_picksplit); +PG_FUNCTION_INFO_V1(gbt_float8_consistent); +PG_FUNCTION_INFO_V1(gbt_float8_distance); +PG_FUNCTION_INFO_V1(gbt_float8_penalty); +PG_FUNCTION_INFO_V1(gbt_float8_same); + + +static bool +gbt_float8gt(const void *a, const void *b, FmgrInfo *flinfo) +{ + return (*((const float8 *) a) > *((const float8 *) b)); +} +static bool +gbt_float8ge(const void *a, const void *b, FmgrInfo *flinfo) +{ + return (*((const float8 *) a) >= *((const float8 *) b)); +} +static bool +gbt_float8eq(const void *a, const void *b, FmgrInfo *flinfo) +{ + return (*((const float8 *) a) == *((const float8 *) b)); +} +static bool +gbt_float8le(const void *a, const void *b, FmgrInfo *flinfo) +{ + return (*((const float8 *) a) <= *((const float8 *) b)); +} +static bool +gbt_float8lt(const void *a, const void *b, FmgrInfo *flinfo) +{ + return (*((const float8 *) a) < *((const float8 *) b)); +} + +static int +gbt_float8key_cmp(const void *a, const void *b, FmgrInfo *flinfo) +{ + float8KEY *ia = (float8KEY *) (((const Nsrt *) a)->t); + float8KEY *ib = (float8KEY *) (((const Nsrt *) b)->t); + + if (ia->lower == ib->lower) + { + if (ia->upper == ib->upper) + return 0; + + return (ia->upper > ib->upper) ? 1 : -1; + } + + return (ia->lower > ib->lower) ? 1 : -1; +} + +static float8 +gbt_float8_dist(const void *a, const void *b, FmgrInfo *flinfo) +{ + float8 arg1 = *(const float8 *) a; + float8 arg2 = *(const float8 *) b; + float8 r; + + r = arg1 - arg2; + CHECKFLOATVAL(r, isinf(arg1) || isinf(arg2), true); + + return Abs(r); +} + + +static const gbtree_ninfo tinfo = +{ + gbt_t_float8, + sizeof(float8), + 16, /* sizeof(gbtreekey16) */ + gbt_float8gt, + gbt_float8ge, + gbt_float8eq, + gbt_float8le, + gbt_float8lt, + gbt_float8key_cmp, + gbt_float8_dist +}; + + +PG_FUNCTION_INFO_V1(float8_dist); +Datum +float8_dist(PG_FUNCTION_ARGS) +{ + float8 a = PG_GETARG_FLOAT8(0); + float8 b = PG_GETARG_FLOAT8(1); + float8 r; + + r = a - b; + CHECKFLOATVAL(r, isinf(a) || isinf(b), true); + + PG_RETURN_FLOAT8(Abs(r)); +} + +/************************************************** + * float8 ops + **************************************************/ + + +Datum +gbt_float8_compress(PG_FUNCTION_ARGS) +{ + GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0); + + PG_RETURN_POINTER(gbt_num_compress(entry, &tinfo)); +} + +Datum +gbt_float8_fetch(PG_FUNCTION_ARGS) +{ + GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0); + + PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo)); +} + +Datum +gbt_float8_consistent(PG_FUNCTION_ARGS) +{ + GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0); + float8 query = PG_GETARG_FLOAT8(1); + StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2); + + /* Oid subtype = PG_GETARG_OID(3); */ + bool *recheck = (bool *) PG_GETARG_POINTER(4); + float8KEY *kkk = (float8KEY *) DatumGetPointer(entry->key); + GBT_NUMKEY_R key; + + /* All cases served by this function are exact */ + *recheck = false; + + key.lower = (GBT_NUMKEY *) &kkk->lower; + key.upper = (GBT_NUMKEY *) &kkk->upper; + + PG_RETURN_BOOL(gbt_num_consistent(&key, (void *) &query, &strategy, + GIST_LEAF(entry), &tinfo, + fcinfo->flinfo)); +} + + +Datum +gbt_float8_distance(PG_FUNCTION_ARGS) +{ + GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0); + float8 query = PG_GETARG_FLOAT8(1); + + /* Oid subtype = PG_GETARG_OID(3); */ + float8KEY *kkk = (float8KEY *) DatumGetPointer(entry->key); + GBT_NUMKEY_R key; + + key.lower = (GBT_NUMKEY *) &kkk->lower; + key.upper = (GBT_NUMKEY *) &kkk->upper; + + PG_RETURN_FLOAT8(gbt_num_distance(&key, (void *) &query, GIST_LEAF(entry), + &tinfo, fcinfo->flinfo)); +} + + +Datum +gbt_float8_union(PG_FUNCTION_ARGS) +{ + GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0); + void *out = palloc(sizeof(float8KEY)); + + *(int *) PG_GETARG_POINTER(1) = sizeof(float8KEY); + PG_RETURN_POINTER(gbt_num_union((void *) out, entryvec, &tinfo, fcinfo->flinfo)); +} + + +Datum +gbt_float8_penalty(PG_FUNCTION_ARGS) +{ + float8KEY *origentry = (float8KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key); + float8KEY *newentry = (float8KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key); + float *result = (float *) PG_GETARG_POINTER(2); + + penalty_num(result, origentry->lower, origentry->upper, newentry->lower, newentry->upper); + + PG_RETURN_POINTER(result); + +} + +Datum +gbt_float8_picksplit(PG_FUNCTION_ARGS) +{ + PG_RETURN_POINTER(gbt_num_picksplit((GistEntryVector *) PG_GETARG_POINTER(0), + (GIST_SPLITVEC *) PG_GETARG_POINTER(1), + &tinfo, fcinfo->flinfo)); +} + +Datum +gbt_float8_same(PG_FUNCTION_ARGS) +{ + float8KEY *b1 = (float8KEY *) PG_GETARG_POINTER(0); + float8KEY *b2 = (float8KEY *) PG_GETARG_POINTER(1); + bool *result = (bool *) PG_GETARG_POINTER(2); + + *result = gbt_num_same((void *) b1, (void *) b2, &tinfo, fcinfo->flinfo); + PG_RETURN_POINTER(result); +} |