granicus.if.org Git - postgresql/blob - contrib/btree_gist/btree_int8.c

   1 /*
   2  * contrib/btree_gist/btree_int8.c
   3  */
   4 #include "postgres.h"
   5
   6 #include "btree_gist.h"
   7 #include "btree_utils_num.h"
   8
   9 typedef struct int64key
  10 {
  11         int64           lower;
  12         int64           upper;
  13 } int64KEY;
  14
  15 /*
  16 ** int64 ops
  17 */
  18 PG_FUNCTION_INFO_V1(gbt_int8_compress);
  19 PG_FUNCTION_INFO_V1(gbt_int8_fetch);
  20 PG_FUNCTION_INFO_V1(gbt_int8_union);
  21 PG_FUNCTION_INFO_V1(gbt_int8_picksplit);
  22 PG_FUNCTION_INFO_V1(gbt_int8_consistent);
  23 PG_FUNCTION_INFO_V1(gbt_int8_distance);
  24 PG_FUNCTION_INFO_V1(gbt_int8_penalty);
  25 PG_FUNCTION_INFO_V1(gbt_int8_same);
  26
  27
  28 static bool
  29 gbt_int8gt(const void *a, const void *b)
  30 {
  31         return (*((const int64 *) a) > *((const int64 *) b));
  32 }
  33 static bool
  34 gbt_int8ge(const void *a, const void *b)
  35 {
  36         return (*((const int64 *) a) >= *((const int64 *) b));
  37 }
  38 static bool
  39 gbt_int8eq(const void *a, const void *b)
  40 {
  41         return (*((const int64 *) a) == *((const int64 *) b));
  42 }
  43 static bool
  44 gbt_int8le(const void *a, const void *b)
  45 {
  46         return (*((const int64 *) a) <= *((const int64 *) b));
  47 }
  48 static bool
  49 gbt_int8lt(const void *a, const void *b)
  50 {
  51         return (*((const int64 *) a) < *((const int64 *) b));
  52 }
  53
  54 static int
  55 gbt_int8key_cmp(const void *a, const void *b)
  56 {
  57         int64KEY   *ia = (int64KEY *) (((const Nsrt *) a)->t);
  58         int64KEY   *ib = (int64KEY *) (((const Nsrt *) b)->t);
  59
  60         if (ia->lower == ib->lower)
  61         {
  62                 if (ia->upper == ib->upper)
  63                         return 0;
  64
  65                 return (ia->upper > ib->upper) ? 1 : -1;
  66         }
  67
  68         return (ia->lower > ib->lower) ? 1 : -1;
  69 }
  70
  71 static float8
  72 gbt_int8_dist(const void *a, const void *b)
  73 {
  74         return GET_FLOAT_DISTANCE(int64, a, b);
  75 }
  76
  77
  78 static const gbtree_ninfo tinfo =
  79 {
  80         gbt_t_int8,
  81         sizeof(int64),
  82         16,                                                     /* sizeof(gbtreekey16) */
  83         gbt_int8gt,
  84         gbt_int8ge,
  85         gbt_int8eq,
  86         gbt_int8le,
  87         gbt_int8lt,
  88         gbt_int8key_cmp,
  89         gbt_int8_dist
  90 };
  91
  92
  93 PG_FUNCTION_INFO_V1(int8_dist);
  94 Datum
  95 int8_dist(PG_FUNCTION_ARGS)
  96 {
  97         int64           a = PG_GETARG_INT64(0);
  98         int64           b = PG_GETARG_INT64(1);
  99         int64           r;
 100         int64           ra;
 101
 102         r = a - b;
 103         ra = Abs(r);
 104
 105         /* Overflow check. */
 106         if (ra < 0 || (!SAMESIGN(a, b) && !SAMESIGN(r, a)))
 107                 ereport(ERROR,
 108                                 (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
 109                                  errmsg("bigint out of range")));
 110
 111         PG_RETURN_INT64(ra);
 112 }
 113
 114
 115 /**************************************************
 116  * int64 ops
 117  **************************************************/
 118
 119
 120 Datum
 121 gbt_int8_compress(PG_FUNCTION_ARGS)
 122 {
 123         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 124
 125         PG_RETURN_POINTER(gbt_num_compress(entry, &tinfo));
 126 }
 127
 128 Datum
 129 gbt_int8_fetch(PG_FUNCTION_ARGS)
 130 {
 131         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 132
 133         PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
 134 }
 135
 136 Datum
 137 gbt_int8_consistent(PG_FUNCTION_ARGS)
 138 {
 139         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 140         int64           query = PG_GETARG_INT64(1);
 141         StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
 142
 143         /* Oid          subtype = PG_GETARG_OID(3); */
 144         bool       *recheck = (bool *) PG_GETARG_POINTER(4);
 145         int64KEY   *kkk = (int64KEY *) DatumGetPointer(entry->key);
 146         GBT_NUMKEY_R key;
 147
 148         /* All cases served by this function are exact */
 149         *recheck = false;
 150
 151         key.lower = (GBT_NUMKEY *) &kkk->lower;
 152         key.upper = (GBT_NUMKEY *) &kkk->upper;
 153
 154         PG_RETURN_BOOL(
 155                                    gbt_num_consistent(&key, (void *) &query, &strategy, GIST_LEAF(entry), &tinfo)
 156                 );
 157 }
 158
 159
 160 Datum
 161 gbt_int8_distance(PG_FUNCTION_ARGS)
 162 {
 163         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 164         int64           query = PG_GETARG_INT64(1);
 165
 166         /* Oid          subtype = PG_GETARG_OID(3); */
 167         int64KEY   *kkk = (int64KEY *) DatumGetPointer(entry->key);
 168         GBT_NUMKEY_R key;
 169
 170         key.lower = (GBT_NUMKEY *) &kkk->lower;
 171         key.upper = (GBT_NUMKEY *) &kkk->upper;
 172
 173         PG_RETURN_FLOAT8(
 174                         gbt_num_distance(&key, (void *) &query, GIST_LEAF(entry), &tinfo)
 175                 );
 176 }
 177
 178
 179 Datum
 180 gbt_int8_union(PG_FUNCTION_ARGS)
 181 {
 182         GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
 183         void       *out = palloc(sizeof(int64KEY));
 184
 185         *(int *) PG_GETARG_POINTER(1) = sizeof(int64KEY);
 186         PG_RETURN_POINTER(gbt_num_union((void *) out, entryvec, &tinfo));
 187 }
 188
 189
 190 Datum
 191 gbt_int8_penalty(PG_FUNCTION_ARGS)
 192 {
 193         int64KEY   *origentry = (int64KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
 194         int64KEY   *newentry = (int64KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
 195         float      *result = (float *) PG_GETARG_POINTER(2);
 196
 197         penalty_num(result, origentry->lower, origentry->upper, newentry->lower, newentry->upper);
 198
 199         PG_RETURN_POINTER(result);
 200 }
 201
 202 Datum
 203 gbt_int8_picksplit(PG_FUNCTION_ARGS)
 204 {
 205         PG_RETURN_POINTER(gbt_num_picksplit(
 206                                                                         (GistEntryVector *) PG_GETARG_POINTER(0),
 207                                                                           (GIST_SPLITVEC *) PG_GETARG_POINTER(1),
 208                                                                                 &tinfo
 209                                                                                 ));
 210 }
 211
 212 Datum
 213 gbt_int8_same(PG_FUNCTION_ARGS)
 214 {
 215         int64KEY   *b1 = (int64KEY *) PG_GETARG_POINTER(0);
 216         int64KEY   *b2 = (int64KEY *) PG_GETARG_POINTER(1);
 217         bool       *result = (bool *) PG_GETARG_POINTER(2);
 218
 219         *result = gbt_num_same((void *) b1, (void *) b2, &tinfo);
 220         PG_RETURN_POINTER(result);
 221 }