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/*
* 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"
#include "utils/sortsupport.h"
typedef struct
{
Cash lower;
Cash upper;
} cashKEY;
/* GiST support functions */
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);
PG_FUNCTION_INFO_V1(gbt_cash_sortsupport);
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 = i64abs(r);
PG_RETURN_CASH(ra);
}
/**************************************************
* GiST support functions
**************************************************/
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, &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, &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(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);
}
static int
gbt_cash_ssup_cmp(Datum x, Datum y, SortSupport ssup)
{
cashKEY *arg1 = (cashKEY *) DatumGetPointer(x);
cashKEY *arg2 = (cashKEY *) DatumGetPointer(y);
/* for leaf items we expect lower == upper, so only compare lower */
if (arg1->lower > arg2->lower)
return 1;
else if (arg1->lower < arg2->lower)
return -1;
else
return 0;
}
Datum
gbt_cash_sortsupport(PG_FUNCTION_ARGS)
{
SortSupport ssup = (SortSupport) PG_GETARG_POINTER(0);
ssup->comparator = gbt_cash_ssup_cmp;
ssup->ssup_extra = NULL;
PG_RETURN_VOID();
}
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