diff options
Diffstat (limited to 'contrib/btree_gist/btree_cash.c')
| -rw-r--r-- | contrib/btree_gist/btree_cash.c | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/contrib/btree_gist/btree_cash.c b/contrib/btree_gist/btree_cash.c new file mode 100644 index 0000000..dfa2322 --- /dev/null +++ b/contrib/btree_gist/btree_cash.c @@ -0,0 +1,218 @@ +/* + * contrib/btree_gist/btree_cash.c + */ +#include "postgres.h" + +#include "btree_gist.h" +#include "btree_utils_num.h" +#include "common/int.h" +#include "utils/cash.h" + +typedef struct +{ + Cash lower; + Cash upper; +} cashKEY; + +/* +** Cash ops +*/ +PG_FUNCTION_INFO_V1(gbt_cash_compress); +PG_FUNCTION_INFO_V1(gbt_cash_fetch); +PG_FUNCTION_INFO_V1(gbt_cash_union); +PG_FUNCTION_INFO_V1(gbt_cash_picksplit); +PG_FUNCTION_INFO_V1(gbt_cash_consistent); +PG_FUNCTION_INFO_V1(gbt_cash_distance); +PG_FUNCTION_INFO_V1(gbt_cash_penalty); +PG_FUNCTION_INFO_V1(gbt_cash_same); + +static bool +gbt_cashgt(const void *a, const void *b, FmgrInfo *flinfo) +{ + return (*((const Cash *) a) > *((const Cash *) b)); +} +static bool +gbt_cashge(const void *a, const void *b, FmgrInfo *flinfo) +{ + return (*((const Cash *) a) >= *((const Cash *) b)); +} +static bool +gbt_casheq(const void *a, const void *b, FmgrInfo *flinfo) +{ + return (*((const Cash *) a) == *((const Cash *) b)); +} +static bool +gbt_cashle(const void *a, const void *b, FmgrInfo *flinfo) +{ + return (*((const Cash *) a) <= *((const Cash *) b)); +} +static bool +gbt_cashlt(const void *a, const void *b, FmgrInfo *flinfo) +{ + return (*((const Cash *) a) < *((const Cash *) b)); +} + +static int +gbt_cashkey_cmp(const void *a, const void *b, FmgrInfo *flinfo) +{ + cashKEY *ia = (cashKEY *) (((const Nsrt *) a)->t); + cashKEY *ib = (cashKEY *) (((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_cash_dist(const void *a, const void *b, FmgrInfo *flinfo) +{ + return GET_FLOAT_DISTANCE(Cash, a, b); +} + + +static const gbtree_ninfo tinfo = +{ + gbt_t_cash, + sizeof(Cash), + 16, /* sizeof(gbtreekey16) */ + gbt_cashgt, + gbt_cashge, + gbt_casheq, + gbt_cashle, + gbt_cashlt, + gbt_cashkey_cmp, + gbt_cash_dist +}; + + +PG_FUNCTION_INFO_V1(cash_dist); +Datum +cash_dist(PG_FUNCTION_ARGS) +{ + Cash a = PG_GETARG_CASH(0); + Cash b = PG_GETARG_CASH(1); + Cash r; + Cash ra; + + if (pg_sub_s64_overflow(a, b, &r) || + r == PG_INT64_MIN) + ereport(ERROR, + (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE), + errmsg("money out of range"))); + + ra = Abs(r); + + PG_RETURN_CASH(ra); +} + +/************************************************** + * Cash ops + **************************************************/ + + +Datum +gbt_cash_compress(PG_FUNCTION_ARGS) +{ + GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0); + + PG_RETURN_POINTER(gbt_num_compress(entry, &tinfo)); +} + +Datum +gbt_cash_fetch(PG_FUNCTION_ARGS) +{ + GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0); + + PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo)); +} + +Datum +gbt_cash_consistent(PG_FUNCTION_ARGS) +{ + GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0); + Cash query = PG_GETARG_CASH(1); + StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2); + + /* Oid subtype = PG_GETARG_OID(3); */ + bool *recheck = (bool *) PG_GETARG_POINTER(4); + cashKEY *kkk = (cashKEY *) 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_cash_distance(PG_FUNCTION_ARGS) +{ + GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0); + Cash query = PG_GETARG_CASH(1); + + /* Oid subtype = PG_GETARG_OID(3); */ + cashKEY *kkk = (cashKEY *) 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_cash_union(PG_FUNCTION_ARGS) +{ + GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0); + void *out = palloc(sizeof(cashKEY)); + + *(int *) PG_GETARG_POINTER(1) = sizeof(cashKEY); + PG_RETURN_POINTER(gbt_num_union((void *) out, entryvec, &tinfo, fcinfo->flinfo)); +} + + +Datum +gbt_cash_penalty(PG_FUNCTION_ARGS) +{ + cashKEY *origentry = (cashKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key); + cashKEY *newentry = (cashKEY *) 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_cash_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_cash_same(PG_FUNCTION_ARGS) +{ + cashKEY *b1 = (cashKEY *) PG_GETARG_POINTER(0); + cashKEY *b2 = (cashKEY *) 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); +} |