1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
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);
}
|
