diff options
Diffstat (limited to 'contrib/btree_gist/btree_int2.c')
| -rw-r--r-- | contrib/btree_gist/btree_int2.c | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/contrib/btree_gist/btree_int2.c b/contrib/btree_gist/btree_int2.c new file mode 100644 index 0000000..a91b95f --- /dev/null +++ b/contrib/btree_gist/btree_int2.c @@ -0,0 +1,216 @@ +/* + * contrib/btree_gist/btree_int2.c + */ +#include "postgres.h" + +#include "btree_gist.h" +#include "btree_utils_num.h" +#include "common/int.h" + +typedef struct int16key +{ + int16 lower; + int16 upper; +} int16KEY; + +/* +** int16 ops +*/ +PG_FUNCTION_INFO_V1(gbt_int2_compress); +PG_FUNCTION_INFO_V1(gbt_int2_fetch); +PG_FUNCTION_INFO_V1(gbt_int2_union); +PG_FUNCTION_INFO_V1(gbt_int2_picksplit); +PG_FUNCTION_INFO_V1(gbt_int2_consistent); +PG_FUNCTION_INFO_V1(gbt_int2_distance); +PG_FUNCTION_INFO_V1(gbt_int2_penalty); +PG_FUNCTION_INFO_V1(gbt_int2_same); + +static bool +gbt_int2gt(const void *a, const void *b, FmgrInfo *flinfo) +{ + return (*((const int16 *) a) > *((const int16 *) b)); +} +static bool +gbt_int2ge(const void *a, const void *b, FmgrInfo *flinfo) +{ + return (*((const int16 *) a) >= *((const int16 *) b)); +} +static bool +gbt_int2eq(const void *a, const void *b, FmgrInfo *flinfo) +{ + return (*((const int16 *) a) == *((const int16 *) b)); +} +static bool +gbt_int2le(const void *a, const void *b, FmgrInfo *flinfo) +{ + return (*((const int16 *) a) <= *((const int16 *) b)); +} +static bool +gbt_int2lt(const void *a, const void *b, FmgrInfo *flinfo) +{ + return (*((const int16 *) a) < *((const int16 *) b)); +} + +static int +gbt_int2key_cmp(const void *a, const void *b, FmgrInfo *flinfo) +{ + int16KEY *ia = (int16KEY *) (((const Nsrt *) a)->t); + int16KEY *ib = (int16KEY *) (((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_int2_dist(const void *a, const void *b, FmgrInfo *flinfo) +{ + return GET_FLOAT_DISTANCE(int16, a, b); +} + + +static const gbtree_ninfo tinfo = +{ + gbt_t_int2, + sizeof(int16), + 4, /* sizeof(gbtreekey4) */ + gbt_int2gt, + gbt_int2ge, + gbt_int2eq, + gbt_int2le, + gbt_int2lt, + gbt_int2key_cmp, + gbt_int2_dist +}; + + +PG_FUNCTION_INFO_V1(int2_dist); +Datum +int2_dist(PG_FUNCTION_ARGS) +{ + int16 a = PG_GETARG_INT16(0); + int16 b = PG_GETARG_INT16(1); + int16 r; + int16 ra; + + if (pg_sub_s16_overflow(a, b, &r) || + r == PG_INT16_MIN) + ereport(ERROR, + (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE), + errmsg("smallint out of range"))); + + ra = Abs(r); + + PG_RETURN_INT16(ra); +} + + +/************************************************** + * int16 ops + **************************************************/ + + +Datum +gbt_int2_compress(PG_FUNCTION_ARGS) +{ + GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0); + + PG_RETURN_POINTER(gbt_num_compress(entry, &tinfo)); +} + +Datum +gbt_int2_fetch(PG_FUNCTION_ARGS) +{ + GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0); + + PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo)); +} + +Datum +gbt_int2_consistent(PG_FUNCTION_ARGS) +{ + GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0); + int16 query = PG_GETARG_INT16(1); + StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2); + + /* Oid subtype = PG_GETARG_OID(3); */ + bool *recheck = (bool *) PG_GETARG_POINTER(4); + int16KEY *kkk = (int16KEY *) 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_int2_distance(PG_FUNCTION_ARGS) +{ + GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0); + int16 query = PG_GETARG_INT16(1); + + /* Oid subtype = PG_GETARG_OID(3); */ + int16KEY *kkk = (int16KEY *) 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_int2_union(PG_FUNCTION_ARGS) +{ + GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0); + void *out = palloc(sizeof(int16KEY)); + + *(int *) PG_GETARG_POINTER(1) = sizeof(int16KEY); + PG_RETURN_POINTER(gbt_num_union((void *) out, entryvec, &tinfo, fcinfo->flinfo)); +} + + +Datum +gbt_int2_penalty(PG_FUNCTION_ARGS) +{ + int16KEY *origentry = (int16KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key); + int16KEY *newentry = (int16KEY *) 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_int2_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_int2_same(PG_FUNCTION_ARGS) +{ + int16KEY *b1 = (int16KEY *) PG_GETARG_POINTER(0); + int16KEY *b2 = (int16KEY *) 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); +} |