contrib/btree_gist/btree_enum.c

   1 /*
   2  * contrib/btree_gist/btree_enum.c
   3  */
   4 #include "postgres.h"
   5
   6 #include "btree_gist.h"
   7 #include "btree_utils_num.h"
   8 #include "fmgr.h"
   9 #include "utils/fmgrprotos.h"
  10
  11 /* enums are really Oids, so we just use the same structure */
  12
  13 typedef struct
  14 {
  15         Oid                     lower;
  16         Oid                     upper;
  17 } oidKEY;
  18
  19 /*
  20 ** enum ops
  21 */
  22 PG_FUNCTION_INFO_V1(gbt_enum_compress);
  23 PG_FUNCTION_INFO_V1(gbt_enum_fetch);
  24 PG_FUNCTION_INFO_V1(gbt_enum_union);
  25 PG_FUNCTION_INFO_V1(gbt_enum_picksplit);
  26 PG_FUNCTION_INFO_V1(gbt_enum_consistent);
  27 PG_FUNCTION_INFO_V1(gbt_enum_penalty);
  28 PG_FUNCTION_INFO_V1(gbt_enum_same);
  29
  30
  31 static bool
  32 gbt_enumgt(const void *a, const void *b, FmgrInfo *flinfo)
  33 {
  34         return DatumGetBool(CallerFInfoFunctionCall2(enum_gt, flinfo, InvalidOid,
  35                                                                                                  ObjectIdGetDatum(*((const Oid *) a)),
  36                                                                                                  ObjectIdGetDatum(*((const Oid *) b))));
  37 }
  38 static bool
  39 gbt_enumge(const void *a, const void *b, FmgrInfo *flinfo)
  40 {
  41         return DatumGetBool(CallerFInfoFunctionCall2(enum_ge, flinfo, InvalidOid,
  42                                                                                                  ObjectIdGetDatum(*((const Oid *) a)),
  43                                                                                                  ObjectIdGetDatum(*((const Oid *) b))));
  44 }
  45 static bool
  46 gbt_enumeq(const void *a, const void *b, FmgrInfo *flinfo)
  47 {
  48         return (*((const Oid *) a) == *((const Oid *) b));
  49 }
  50 static bool
  51 gbt_enumle(const void *a, const void *b, FmgrInfo *flinfo)
  52 {
  53         return DatumGetBool(CallerFInfoFunctionCall2(enum_le, flinfo, InvalidOid,
  54                                                                                                  ObjectIdGetDatum(*((const Oid *) a)),
  55                                                                                                  ObjectIdGetDatum(*((const Oid *) b))));
  56 }
  57 static bool
  58 gbt_enumlt(const void *a, const void *b, FmgrInfo *flinfo)
  59 {
  60         return DatumGetBool(CallerFInfoFunctionCall2(enum_lt, flinfo, InvalidOid,
  61                                                                                                  ObjectIdGetDatum(*((const Oid *) a)),
  62                                                                                                  ObjectIdGetDatum(*((const Oid *) b))));
  63 }
  64
  65 static int
  66 gbt_enumkey_cmp(const void *a, const void *b, FmgrInfo *flinfo)
  67 {
  68         oidKEY     *ia = (oidKEY *) (((const Nsrt *) a)->t);
  69         oidKEY     *ib = (oidKEY *) (((const Nsrt *) b)->t);
  70
  71         if (ia->lower == ib->lower)
  72         {
  73                 if (ia->upper == ib->upper)
  74                         return 0;
  75
  76                 return DatumGetInt32(CallerFInfoFunctionCall2(enum_cmp, flinfo, InvalidOid,
  77                                                                                                           ObjectIdGetDatum(ia->upper),
  78                                                                                                           ObjectIdGetDatum(ib->upper)));
  79         }
  80
  81         return DatumGetInt32(CallerFInfoFunctionCall2(enum_cmp, flinfo, InvalidOid,
  82                                                                                                   ObjectIdGetDatum(ia->lower),
  83                                                                                                   ObjectIdGetDatum(ib->lower)));
  84 }
  85
  86 static const gbtree_ninfo tinfo =
  87 {
  88         gbt_t_enum,
  89         sizeof(Oid),
  90         8,                                                      /* sizeof(gbtreekey8) */
  91         gbt_enumgt,
  92         gbt_enumge,
  93         gbt_enumeq,
  94         gbt_enumle,
  95         gbt_enumlt,
  96         gbt_enumkey_cmp,
  97         NULL                                            /* no KNN support at least for now */
  98 };
  99
 100
 101 /**************************************************
 102  * Enum ops
 103  **************************************************/
 104
 105
 106 Datum
 107 gbt_enum_compress(PG_FUNCTION_ARGS)
 108 {
 109         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 110
 111         PG_RETURN_POINTER(gbt_num_compress(entry, &tinfo));
 112 }
 113
 114 Datum
 115 gbt_enum_fetch(PG_FUNCTION_ARGS)
 116 {
 117         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 118
 119         PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
 120 }
 121
 122 Datum
 123 gbt_enum_consistent(PG_FUNCTION_ARGS)
 124 {
 125         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 126         Oid                     query = PG_GETARG_OID(1);
 127         StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
 128
 129         /* Oid          subtype = PG_GETARG_OID(3); */
 130         bool       *recheck = (bool *) PG_GETARG_POINTER(4);
 131         oidKEY     *kkk = (oidKEY *) DatumGetPointer(entry->key);
 132         GBT_NUMKEY_R key;
 133
 134         /* All cases served by this function are exact */
 135         *recheck = false;
 136
 137         key.lower = (GBT_NUMKEY *) &kkk->lower;
 138         key.upper = (GBT_NUMKEY *) &kkk->upper;
 139
 140         PG_RETURN_BOOL(gbt_num_consistent(&key, &query, &strategy,
 141                                                                           GIST_LEAF(entry), &tinfo,
 142                                                                           fcinfo->flinfo));
 143 }
 144
 145 Datum
 146 gbt_enum_union(PG_FUNCTION_ARGS)
 147 {
 148         GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
 149         void       *out = palloc(sizeof(oidKEY));
 150
 151         *(int *) PG_GETARG_POINTER(1) = sizeof(oidKEY);
 152         PG_RETURN_POINTER(gbt_num_union(out, entryvec, &tinfo, fcinfo->flinfo));
 153 }
 154
 155
 156 Datum
 157 gbt_enum_penalty(PG_FUNCTION_ARGS)
 158 {
 159         oidKEY     *origentry = (oidKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
 160         oidKEY     *newentry = (oidKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
 161         float      *result = (float *) PG_GETARG_POINTER(2);
 162
 163         penalty_num(result, origentry->lower, origentry->upper, newentry->lower, newentry->upper);
 164
 165         PG_RETURN_POINTER(result);
 166 }
 167
 168 Datum
 169 gbt_enum_picksplit(PG_FUNCTION_ARGS)
 170 {
 171         PG_RETURN_POINTER(gbt_num_picksplit((GistEntryVector *) PG_GETARG_POINTER(0),
 172                                                                                 (GIST_SPLITVEC *) PG_GETARG_POINTER(1),
 173                                                                                 &tinfo, fcinfo->flinfo));
 174 }
 175
 176 Datum
 177 gbt_enum_same(PG_FUNCTION_ARGS)
 178 {
 179         oidKEY     *b1 = (oidKEY *) PG_GETARG_POINTER(0);
 180         oidKEY     *b2 = (oidKEY *) PG_GETARG_POINTER(1);
 181         bool       *result = (bool *) PG_GETARG_POINTER(2);
 182
 183         *result = gbt_num_same((void *) b1, (void *) b2, &tinfo, fcinfo->flinfo);
 184         PG_RETURN_POINTER(result);
 185 }