contrib/btree_gist/btree_oid.c

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