contrib/btree_gist/btree_cash.c

   1 /*
   2  * contrib/btree_gist/btree_cash.c
   3  */
   4 #include "postgres.h"
   5
   6 #include "btree_gist.h"
   7 #include "btree_utils_num.h"
   8 #include "common/int.h"
   9 #include "utils/cash.h"
  10
  11 typedef struct
  12 {
  13         Cash            lower;
  14         Cash            upper;
  15 } cashKEY;
  16
  17 /*
  18 ** Cash ops
  19 */
  20 PG_FUNCTION_INFO_V1(gbt_cash_compress);
  21 PG_FUNCTION_INFO_V1(gbt_cash_fetch);
  22 PG_FUNCTION_INFO_V1(gbt_cash_union);
  23 PG_FUNCTION_INFO_V1(gbt_cash_picksplit);
  24 PG_FUNCTION_INFO_V1(gbt_cash_consistent);
  25 PG_FUNCTION_INFO_V1(gbt_cash_distance);
  26 PG_FUNCTION_INFO_V1(gbt_cash_penalty);
  27 PG_FUNCTION_INFO_V1(gbt_cash_same);
  28
  29 static bool
  30 gbt_cashgt(const void *a, const void *b, FmgrInfo *flinfo)
  31 {
  32         return (*((const Cash *) a) > *((const Cash *) b));
  33 }
  34 static bool
  35 gbt_cashge(const void *a, const void *b, FmgrInfo *flinfo)
  36 {
  37         return (*((const Cash *) a) >= *((const Cash *) b));
  38 }
  39 static bool
  40 gbt_casheq(const void *a, const void *b, FmgrInfo *flinfo)
  41 {
  42         return (*((const Cash *) a) == *((const Cash *) b));
  43 }
  44 static bool
  45 gbt_cashle(const void *a, const void *b, FmgrInfo *flinfo)
  46 {
  47         return (*((const Cash *) a) <= *((const Cash *) b));
  48 }
  49 static bool
  50 gbt_cashlt(const void *a, const void *b, FmgrInfo *flinfo)
  51 {
  52         return (*((const Cash *) a) < *((const Cash *) b));
  53 }
  54
  55 static int
  56 gbt_cashkey_cmp(const void *a, const void *b, FmgrInfo *flinfo)
  57 {
  58         cashKEY    *ia = (cashKEY *) (((const Nsrt *) a)->t);
  59         cashKEY    *ib = (cashKEY *) (((const Nsrt *) b)->t);
  60
  61         if (ia->lower == ib->lower)
  62         {
  63                 if (ia->upper == ib->upper)
  64                         return 0;
  65
  66                 return (ia->upper > ib->upper) ? 1 : -1;
  67         }
  68
  69         return (ia->lower > ib->lower) ? 1 : -1;
  70 }
  71
  72 static float8
  73 gbt_cash_dist(const void *a, const void *b, FmgrInfo *flinfo)
  74 {
  75         return GET_FLOAT_DISTANCE(Cash, a, b);
  76 }
  77
  78
  79 static const gbtree_ninfo tinfo =
  80 {
  81         gbt_t_cash,
  82         sizeof(Cash),
  83         16,                                                     /* sizeof(gbtreekey16) */
  84         gbt_cashgt,
  85         gbt_cashge,
  86         gbt_casheq,
  87         gbt_cashle,
  88         gbt_cashlt,
  89         gbt_cashkey_cmp,
  90         gbt_cash_dist
  91 };
  92
  93
  94 PG_FUNCTION_INFO_V1(cash_dist);
  95 Datum
  96 cash_dist(PG_FUNCTION_ARGS)
  97 {
  98         Cash            a = PG_GETARG_CASH(0);
  99         Cash            b = PG_GETARG_CASH(1);
 100         Cash            r;
 101         Cash            ra;
 102
 103         if (pg_sub_s64_overflow(a, b, &r) ||
 104                 r == PG_INT64_MIN)
 105                 ereport(ERROR,
 106                                 (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
 107                                  errmsg("money out of range")));
 108
 109         ra = i64abs(r);
 110
 111         PG_RETURN_CASH(ra);
 112 }
 113
 114 /**************************************************
 115  * Cash ops
 116  **************************************************/
 117
 118
 119 Datum
 120 gbt_cash_compress(PG_FUNCTION_ARGS)
 121 {
 122         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 123
 124         PG_RETURN_POINTER(gbt_num_compress(entry, &tinfo));
 125 }
 126
 127 Datum
 128 gbt_cash_fetch(PG_FUNCTION_ARGS)
 129 {
 130         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 131
 132         PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
 133 }
 134
 135 Datum
 136 gbt_cash_consistent(PG_FUNCTION_ARGS)
 137 {
 138         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 139         Cash            query = PG_GETARG_CASH(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         cashKEY    *kkk = (cashKEY *) 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(gbt_num_consistent(&key, &query, &strategy,
 154                                                                           GIST_LEAF(entry), &tinfo,
 155                                                                           fcinfo->flinfo));
 156 }
 157
 158
 159 Datum
 160 gbt_cash_distance(PG_FUNCTION_ARGS)
 161 {
 162         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 163         Cash            query = PG_GETARG_CASH(1);
 164
 165         /* Oid          subtype = PG_GETARG_OID(3); */
 166         cashKEY    *kkk = (cashKEY *) 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(gbt_num_distance(&key, &query, GIST_LEAF(entry),
 173                                                                           &tinfo, fcinfo->flinfo));
 174 }
 175
 176
 177 Datum
 178 gbt_cash_union(PG_FUNCTION_ARGS)
 179 {
 180         GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
 181         void       *out = palloc(sizeof(cashKEY));
 182
 183         *(int *) PG_GETARG_POINTER(1) = sizeof(cashKEY);
 184         PG_RETURN_POINTER(gbt_num_union(out, entryvec, &tinfo, fcinfo->flinfo));
 185 }
 186
 187
 188 Datum
 189 gbt_cash_penalty(PG_FUNCTION_ARGS)
 190 {
 191         cashKEY    *origentry = (cashKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
 192         cashKEY    *newentry = (cashKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
 193         float      *result = (float *) PG_GETARG_POINTER(2);
 194
 195         penalty_num(result, origentry->lower, origentry->upper, newentry->lower, newentry->upper);
 196
 197         PG_RETURN_POINTER(result);
 198 }
 199
 200 Datum
 201 gbt_cash_picksplit(PG_FUNCTION_ARGS)
 202 {
 203         PG_RETURN_POINTER(gbt_num_picksplit((GistEntryVector *) PG_GETARG_POINTER(0),
 204                                                                                 (GIST_SPLITVEC *) PG_GETARG_POINTER(1),
 205                                                                                 &tinfo, fcinfo->flinfo));
 206 }
 207
 208 Datum
 209 gbt_cash_same(PG_FUNCTION_ARGS)
 210 {
 211         cashKEY    *b1 = (cashKEY *) PG_GETARG_POINTER(0);
 212         cashKEY    *b2 = (cashKEY *) PG_GETARG_POINTER(1);
 213         bool       *result = (bool *) PG_GETARG_POINTER(2);
 214
 215         *result = gbt_num_same((void *) b1, (void *) b2, &tinfo, fcinfo->flinfo);
 216         PG_RETURN_POINTER(result);
 217 }