contrib/btree_gist/btree_interval.c

   1 /*
   2  * contrib/btree_gist/btree_interval.c
   3  */
   4 #include "postgres.h"
   5
   6 #include "btree_gist.h"
   7 #include "btree_utils_num.h"
   8 #include "utils/fmgrprotos.h"
   9 #include "utils/timestamp.h"
  10
  11 typedef struct
  12 {
  13         Interval        lower,
  14                                 upper;
  15 } intvKEY;
  16
  17
  18 /*
  19 ** Interval ops
  20 */
  21 PG_FUNCTION_INFO_V1(gbt_intv_compress);
  22 PG_FUNCTION_INFO_V1(gbt_intv_fetch);
  23 PG_FUNCTION_INFO_V1(gbt_intv_decompress);
  24 PG_FUNCTION_INFO_V1(gbt_intv_union);
  25 PG_FUNCTION_INFO_V1(gbt_intv_picksplit);
  26 PG_FUNCTION_INFO_V1(gbt_intv_consistent);
  27 PG_FUNCTION_INFO_V1(gbt_intv_distance);
  28 PG_FUNCTION_INFO_V1(gbt_intv_penalty);
  29 PG_FUNCTION_INFO_V1(gbt_intv_same);
  30
  31
  32 static bool
  33 gbt_intvgt(const void *a, const void *b, FmgrInfo *flinfo)
  34 {
  35         return DatumGetBool(DirectFunctionCall2(interval_gt, IntervalPGetDatum(a), IntervalPGetDatum(b)));
  36 }
  37
  38 static bool
  39 gbt_intvge(const void *a, const void *b, FmgrInfo *flinfo)
  40 {
  41         return DatumGetBool(DirectFunctionCall2(interval_ge, IntervalPGetDatum(a), IntervalPGetDatum(b)));
  42 }
  43
  44 static bool
  45 gbt_intveq(const void *a, const void *b, FmgrInfo *flinfo)
  46 {
  47         return DatumGetBool(DirectFunctionCall2(interval_eq, IntervalPGetDatum(a), IntervalPGetDatum(b)));
  48 }
  49
  50 static bool
  51 gbt_intvle(const void *a, const void *b, FmgrInfo *flinfo)
  52 {
  53         return DatumGetBool(DirectFunctionCall2(interval_le, IntervalPGetDatum(a), IntervalPGetDatum(b)));
  54 }
  55
  56 static bool
  57 gbt_intvlt(const void *a, const void *b, FmgrInfo *flinfo)
  58 {
  59         return DatumGetBool(DirectFunctionCall2(interval_lt, IntervalPGetDatum(a), IntervalPGetDatum(b)));
  60 }
  61
  62 static int
  63 gbt_intvkey_cmp(const void *a, const void *b, FmgrInfo *flinfo)
  64 {
  65         intvKEY    *ia = (intvKEY *) (((const Nsrt *) a)->t);
  66         intvKEY    *ib = (intvKEY *) (((const Nsrt *) b)->t);
  67         int                     res;
  68
  69         res = DatumGetInt32(DirectFunctionCall2(interval_cmp, IntervalPGetDatum(&ia->lower), IntervalPGetDatum(&ib->lower)));
  70         if (res == 0)
  71                 return DatumGetInt32(DirectFunctionCall2(interval_cmp, IntervalPGetDatum(&ia->upper), IntervalPGetDatum(&ib->upper)));
  72
  73         return res;
  74 }
  75
  76
  77 static double
  78 intr2num(const Interval *i)
  79 {
  80         return INTERVAL_TO_SEC(i);
  81 }
  82
  83 static float8
  84 gbt_intv_dist(const void *a, const void *b, FmgrInfo *flinfo)
  85 {
  86         return fabs(intr2num((const Interval *) a) - intr2num((const Interval *) b));
  87 }
  88
  89 /*
  90  * INTERVALSIZE should be the actual size-on-disk of an Interval, as shown
  91  * in pg_type.  This might be less than sizeof(Interval) if the compiler
  92  * insists on adding alignment padding at the end of the struct.  (Note:
  93  * this concern is obsolete with the current definition of Interval, but
  94  * was real before a separate "day" field was added to it.)
  95  */
  96 #define INTERVALSIZE 16
  97
  98 static const gbtree_ninfo tinfo =
  99 {
 100         gbt_t_intv,
 101         sizeof(Interval),
 102         32,                                                     /* sizeof(gbtreekey32) */
 103         gbt_intvgt,
 104         gbt_intvge,
 105         gbt_intveq,
 106         gbt_intvle,
 107         gbt_intvlt,
 108         gbt_intvkey_cmp,
 109         gbt_intv_dist
 110 };
 111
 112
 113 Interval *
 114 abs_interval(Interval *a)
 115 {
 116         static const Interval zero = {0, 0, 0};
 117
 118         if (DatumGetBool(DirectFunctionCall2(interval_lt,
 119                                                                                  IntervalPGetDatum(a),
 120                                                                                  IntervalPGetDatum(&zero))))
 121                 a = DatumGetIntervalP(DirectFunctionCall1(interval_um,
 122                                                                                                   IntervalPGetDatum(a)));
 123
 124         return a;
 125 }
 126
 127 PG_FUNCTION_INFO_V1(interval_dist);
 128 Datum
 129 interval_dist(PG_FUNCTION_ARGS)
 130 {
 131         Datum           diff = DirectFunctionCall2(interval_mi,
 132                                                                                    PG_GETARG_DATUM(0),
 133                                                                                    PG_GETARG_DATUM(1));
 134
 135         PG_RETURN_INTERVAL_P(abs_interval(DatumGetIntervalP(diff)));
 136 }
 137
 138
 139 /**************************************************
 140  * interval ops
 141  **************************************************/
 142
 143
 144 Datum
 145 gbt_intv_compress(PG_FUNCTION_ARGS)
 146 {
 147         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 148         GISTENTRY  *retval = entry;
 149
 150         if (entry->leafkey || INTERVALSIZE != sizeof(Interval))
 151         {
 152                 char       *r = (char *) palloc(2 * INTERVALSIZE);
 153
 154                 retval = palloc(sizeof(GISTENTRY));
 155
 156                 if (entry->leafkey)
 157                 {
 158                         Interval   *key = DatumGetIntervalP(entry->key);
 159
 160                         memcpy(r, key, INTERVALSIZE);
 161                         memcpy(r + INTERVALSIZE, key, INTERVALSIZE);
 162                 }
 163                 else
 164                 {
 165                         intvKEY    *key = (intvKEY *) DatumGetPointer(entry->key);
 166
 167                         memcpy(r, &key->lower, INTERVALSIZE);
 168                         memcpy(r + INTERVALSIZE, &key->upper, INTERVALSIZE);
 169                 }
 170                 gistentryinit(*retval, PointerGetDatum(r),
 171                                           entry->rel, entry->page,
 172                                           entry->offset, false);
 173         }
 174
 175         PG_RETURN_POINTER(retval);
 176 }
 177
 178 Datum
 179 gbt_intv_fetch(PG_FUNCTION_ARGS)
 180 {
 181         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 182
 183         PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
 184 }
 185
 186 Datum
 187 gbt_intv_decompress(PG_FUNCTION_ARGS)
 188 {
 189         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 190         GISTENTRY  *retval = entry;
 191
 192         if (INTERVALSIZE != sizeof(Interval))
 193         {
 194                 intvKEY    *r = palloc(sizeof(intvKEY));
 195                 char       *key = DatumGetPointer(entry->key);
 196
 197                 retval = palloc(sizeof(GISTENTRY));
 198                 memcpy(&r->lower, key, INTERVALSIZE);
 199                 memcpy(&r->upper, key + INTERVALSIZE, INTERVALSIZE);
 200
 201                 gistentryinit(*retval, PointerGetDatum(r),
 202                                           entry->rel, entry->page,
 203                                           entry->offset, false);
 204         }
 205         PG_RETURN_POINTER(retval);
 206 }
 207
 208
 209 Datum
 210 gbt_intv_consistent(PG_FUNCTION_ARGS)
 211 {
 212         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 213         Interval   *query = PG_GETARG_INTERVAL_P(1);
 214         StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
 215
 216         /* Oid          subtype = PG_GETARG_OID(3); */
 217         bool       *recheck = (bool *) PG_GETARG_POINTER(4);
 218         intvKEY    *kkk = (intvKEY *) DatumGetPointer(entry->key);
 219         GBT_NUMKEY_R key;
 220
 221         /* All cases served by this function are exact */
 222         *recheck = false;
 223
 224         key.lower = (GBT_NUMKEY *) &kkk->lower;
 225         key.upper = (GBT_NUMKEY *) &kkk->upper;
 226
 227         PG_RETURN_BOOL(gbt_num_consistent(&key, query, &strategy,
 228                                                                           GIST_LEAF(entry), &tinfo, fcinfo->flinfo));
 229 }
 230
 231
 232 Datum
 233 gbt_intv_distance(PG_FUNCTION_ARGS)
 234 {
 235         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 236         Interval   *query = PG_GETARG_INTERVAL_P(1);
 237
 238         /* Oid          subtype = PG_GETARG_OID(3); */
 239         intvKEY    *kkk = (intvKEY *) DatumGetPointer(entry->key);
 240         GBT_NUMKEY_R key;
 241
 242         key.lower = (GBT_NUMKEY *) &kkk->lower;
 243         key.upper = (GBT_NUMKEY *) &kkk->upper;
 244
 245         PG_RETURN_FLOAT8(gbt_num_distance(&key, query, GIST_LEAF(entry),
 246                                                                           &tinfo, fcinfo->flinfo));
 247 }
 248
 249
 250 Datum
 251 gbt_intv_union(PG_FUNCTION_ARGS)
 252 {
 253         GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
 254         void       *out = palloc(sizeof(intvKEY));
 255
 256         *(int *) PG_GETARG_POINTER(1) = sizeof(intvKEY);
 257         PG_RETURN_POINTER(gbt_num_union(out, entryvec, &tinfo, fcinfo->flinfo));
 258 }
 259
 260
 261 Datum
 262 gbt_intv_penalty(PG_FUNCTION_ARGS)
 263 {
 264         intvKEY    *origentry = (intvKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
 265         intvKEY    *newentry = (intvKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
 266         float      *result = (float *) PG_GETARG_POINTER(2);
 267         double          iorg[2],
 268                                 inew[2];
 269
 270         iorg[0] = intr2num(&origentry->lower);
 271         iorg[1] = intr2num(&origentry->upper);
 272         inew[0] = intr2num(&newentry->lower);
 273         inew[1] = intr2num(&newentry->upper);
 274
 275         penalty_num(result, iorg[0], iorg[1], inew[0], inew[1]);
 276
 277         PG_RETURN_POINTER(result);
 278 }
 279
 280 Datum
 281 gbt_intv_picksplit(PG_FUNCTION_ARGS)
 282 {
 283         PG_RETURN_POINTER(gbt_num_picksplit((GistEntryVector *) PG_GETARG_POINTER(0),
 284                                                                                 (GIST_SPLITVEC *) PG_GETARG_POINTER(1),
 285                                                                                 &tinfo, fcinfo->flinfo));
 286 }
 287
 288 Datum
 289 gbt_intv_same(PG_FUNCTION_ARGS)
 290 {
 291         intvKEY    *b1 = (intvKEY *) PG_GETARG_POINTER(0);
 292         intvKEY    *b2 = (intvKEY *) PG_GETARG_POINTER(1);
 293         bool       *result = (bool *) PG_GETARG_POINTER(2);
 294
 295         *result = gbt_num_same((void *) b1, (void *) b2, &tinfo, fcinfo->flinfo);
 296         PG_RETURN_POINTER(result);
 297 }