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/*
* contrib/btree_gist/btree_numeric.c
*/
#include "postgres.h"
#include <math.h>
#include <float.h>
#include "btree_gist.h"
#include "btree_utils_var.h"
#include "utils/builtins.h"
#include "utils/numeric.h"
#include "utils/rel.h"
/*
** Bytea ops
*/
PG_FUNCTION_INFO_V1(gbt_numeric_compress);
PG_FUNCTION_INFO_V1(gbt_numeric_union);
PG_FUNCTION_INFO_V1(gbt_numeric_picksplit);
PG_FUNCTION_INFO_V1(gbt_numeric_consistent);
PG_FUNCTION_INFO_V1(gbt_numeric_penalty);
PG_FUNCTION_INFO_V1(gbt_numeric_same);
/* define for comparison */
static bool
gbt_numeric_gt(const void *a, const void *b, Oid collation, FmgrInfo *flinfo)
{
return DatumGetBool(DirectFunctionCall2(numeric_gt,
PointerGetDatum(a),
PointerGetDatum(b)));
}
static bool
gbt_numeric_ge(const void *a, const void *b, Oid collation, FmgrInfo *flinfo)
{
return DatumGetBool(DirectFunctionCall2(numeric_ge,
PointerGetDatum(a),
PointerGetDatum(b)));
}
static bool
gbt_numeric_eq(const void *a, const void *b, Oid collation, FmgrInfo *flinfo)
{
return DatumGetBool(DirectFunctionCall2(numeric_eq,
PointerGetDatum(a),
PointerGetDatum(b)));
}
static bool
gbt_numeric_le(const void *a, const void *b, Oid collation, FmgrInfo *flinfo)
{
return DatumGetBool(DirectFunctionCall2(numeric_le,
PointerGetDatum(a),
PointerGetDatum(b)));
}
static bool
gbt_numeric_lt(const void *a, const void *b, Oid collation, FmgrInfo *flinfo)
{
return DatumGetBool(DirectFunctionCall2(numeric_lt,
PointerGetDatum(a),
PointerGetDatum(b)));
}
static int32
gbt_numeric_cmp(const void *a, const void *b, Oid collation, FmgrInfo *flinfo)
{
return DatumGetInt32(DirectFunctionCall2(numeric_cmp,
PointerGetDatum(a),
PointerGetDatum(b)));
}
static const gbtree_vinfo tinfo =
{
gbt_t_numeric,
0,
false,
gbt_numeric_gt,
gbt_numeric_ge,
gbt_numeric_eq,
gbt_numeric_le,
gbt_numeric_lt,
gbt_numeric_cmp,
NULL
};
/**************************************************
* Text ops
**************************************************/
Datum
gbt_numeric_compress(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
PG_RETURN_POINTER(gbt_var_compress(entry, &tinfo));
}
Datum
gbt_numeric_consistent(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
void *query = (void *) DatumGetNumeric(PG_GETARG_DATUM(1));
StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
/* Oid subtype = PG_GETARG_OID(3); */
bool *recheck = (bool *) PG_GETARG_POINTER(4);
bool retval;
GBT_VARKEY *key = (GBT_VARKEY *) DatumGetPointer(entry->key);
GBT_VARKEY_R r = gbt_var_key_readable(key);
/* All cases served by this function are exact */
*recheck = false;
retval = gbt_var_consistent(&r, query, strategy, PG_GET_COLLATION(),
GIST_LEAF(entry), &tinfo, fcinfo->flinfo);
PG_RETURN_BOOL(retval);
}
Datum
gbt_numeric_union(PG_FUNCTION_ARGS)
{
GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
int32 *size = (int *) PG_GETARG_POINTER(1);
PG_RETURN_POINTER(gbt_var_union(entryvec, size, PG_GET_COLLATION(),
&tinfo, fcinfo->flinfo));
}
Datum
gbt_numeric_same(PG_FUNCTION_ARGS)
{
Datum d1 = PG_GETARG_DATUM(0);
Datum d2 = PG_GETARG_DATUM(1);
bool *result = (bool *) PG_GETARG_POINTER(2);
*result = gbt_var_same(d1, d2, PG_GET_COLLATION(), &tinfo, fcinfo->flinfo);
PG_RETURN_POINTER(result);
}
Datum
gbt_numeric_penalty(PG_FUNCTION_ARGS)
{
GISTENTRY *o = (GISTENTRY *) PG_GETARG_POINTER(0);
GISTENTRY *n = (GISTENTRY *) PG_GETARG_POINTER(1);
float *result = (float *) PG_GETARG_POINTER(2);
Numeric us,
os,
ds;
GBT_VARKEY *org = (GBT_VARKEY *) DatumGetPointer(o->key);
GBT_VARKEY *newe = (GBT_VARKEY *) DatumGetPointer(n->key);
Datum uni;
GBT_VARKEY_R rk,
ok,
uk;
rk = gbt_var_key_readable(org);
uni = PointerGetDatum(gbt_var_key_copy(&rk));
gbt_var_bin_union(&uni, newe, PG_GET_COLLATION(), &tinfo, fcinfo->flinfo);
ok = gbt_var_key_readable(org);
uk = gbt_var_key_readable((GBT_VARKEY *) DatumGetPointer(uni));
us = DatumGetNumeric(DirectFunctionCall2(numeric_sub,
PointerGetDatum(uk.upper),
PointerGetDatum(uk.lower)));
os = DatumGetNumeric(DirectFunctionCall2(numeric_sub,
PointerGetDatum(ok.upper),
PointerGetDatum(ok.lower)));
ds = DatumGetNumeric(DirectFunctionCall2(numeric_sub,
NumericGetDatum(us),
NumericGetDatum(os)));
if (numeric_is_nan(us))
{
if (numeric_is_nan(os))
*result = 0.0;
else
*result = 1.0;
}
else
{
Numeric nul = DatumGetNumeric(DirectFunctionCall1(int4_numeric, Int32GetDatum(0)));
*result = 0.0;
if (DirectFunctionCall2(numeric_gt, NumericGetDatum(ds), NumericGetDatum(nul)))
{
*result += FLT_MIN;
os = DatumGetNumeric(DirectFunctionCall2(numeric_div,
NumericGetDatum(ds),
NumericGetDatum(us)));
*result += (float4) DatumGetFloat8(DirectFunctionCall1(numeric_float8_no_overflow, NumericGetDatum(os)));
}
}
if (*result > 0)
*result *= (FLT_MAX / (((GISTENTRY *) PG_GETARG_POINTER(0))->rel->rd_att->natts + 1));
PG_RETURN_POINTER(result);
}
Datum
gbt_numeric_picksplit(PG_FUNCTION_ARGS)
{
GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
GIST_SPLITVEC *v = (GIST_SPLITVEC *) PG_GETARG_POINTER(1);
gbt_var_picksplit(entryvec, v, PG_GET_COLLATION(),
&tinfo, fcinfo->flinfo);
PG_RETURN_POINTER(v);
}
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