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/builtins.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 (float8) Abs(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 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((void *) r, (void *) key, INTERVALSIZE);
 161                         memcpy((void *) (r + INTERVALSIZE), (void *) 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
 179 Datum
 180 gbt_intv_fetch(PG_FUNCTION_ARGS)
 181 {
 182         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 183
 184         PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
 185 }
 186
 187 Datum
 188 gbt_intv_decompress(PG_FUNCTION_ARGS)
 189 {
 190         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 191         GISTENTRY  *retval = entry;
 192
 193         if (INTERVALSIZE != sizeof(Interval))
 194         {
 195                 intvKEY    *r = palloc(sizeof(intvKEY));
 196                 char       *key = DatumGetPointer(entry->key);
 197
 198                 retval = palloc(sizeof(GISTENTRY));
 199                 memcpy(&r->lower, key, INTERVALSIZE);
 200                 memcpy(&r->upper, key + INTERVALSIZE, INTERVALSIZE);
 201
 202                 gistentryinit(*retval, PointerGetDatum(r),
 203                                           entry->rel, entry->page,
 204                                           entry->offset, false);
 205         }
 206         PG_RETURN_POINTER(retval);
 207 }
 208
 209
 210 Datum
 211 gbt_intv_consistent(PG_FUNCTION_ARGS)
 212 {
 213         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 214         Interval   *query = PG_GETARG_INTERVAL_P(1);
 215         StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
 216
 217         /* Oid          subtype = PG_GETARG_OID(3); */
 218         bool       *recheck = (bool *) PG_GETARG_POINTER(4);
 219         intvKEY    *kkk = (intvKEY *) DatumGetPointer(entry->key);
 220         GBT_NUMKEY_R key;
 221
 222         /* All cases served by this function are exact */
 223         *recheck = false;
 224
 225         key.lower = (GBT_NUMKEY *) &kkk->lower;
 226         key.upper = (GBT_NUMKEY *) &kkk->upper;
 227
 228         PG_RETURN_BOOL(gbt_num_consistent(&key, (void *) query, &strategy,
 229                                                                           GIST_LEAF(entry), &tinfo, fcinfo->flinfo));
 230 }
 231
 232
 233 Datum
 234 gbt_intv_distance(PG_FUNCTION_ARGS)
 235 {
 236         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 237         Interval   *query = PG_GETARG_INTERVAL_P(1);
 238
 239         /* Oid          subtype = PG_GETARG_OID(3); */
 240         intvKEY    *kkk = (intvKEY *) DatumGetPointer(entry->key);
 241         GBT_NUMKEY_R key;
 242
 243         key.lower = (GBT_NUMKEY *) &kkk->lower;
 244         key.upper = (GBT_NUMKEY *) &kkk->upper;
 245
 246         PG_RETURN_FLOAT8(gbt_num_distance(&key, (void *) query, GIST_LEAF(entry),
 247                                                                           &tinfo, fcinfo->flinfo));
 248 }
 249
 250
 251 Datum
 252 gbt_intv_union(PG_FUNCTION_ARGS)
 253 {
 254         GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
 255         void       *out = palloc(sizeof(intvKEY));
 256
 257         *(int *) PG_GETARG_POINTER(1) = sizeof(intvKEY);
 258         PG_RETURN_POINTER(gbt_num_union((void *) out, entryvec, &tinfo, fcinfo->flinfo));
 259 }
 260
 261
 262 Datum
 263 gbt_intv_penalty(PG_FUNCTION_ARGS)
 264 {
 265         intvKEY    *origentry = (intvKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
 266         intvKEY    *newentry = (intvKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
 267         float      *result = (float *) PG_GETARG_POINTER(2);
 268         double          iorg[2],
 269                                 inew[2];
 270
 271         iorg[0] = intr2num(&origentry->lower);
 272         iorg[1] = intr2num(&origentry->upper);
 273         inew[0] = intr2num(&newentry->lower);
 274         inew[1] = intr2num(&newentry->upper);
 275
 276         penalty_num(result, iorg[0], iorg[1], inew[0], inew[1]);
 277
 278         PG_RETURN_POINTER(result);
 279
 280 }
 281
 282 Datum
 283 gbt_intv_picksplit(PG_FUNCTION_ARGS)
 284 {
 285         PG_RETURN_POINTER(gbt_num_picksplit((GistEntryVector *) PG_GETARG_POINTER(0),
 286                                                                                 (GIST_SPLITVEC *) PG_GETARG_POINTER(1),
 287                                                                                 &tinfo, fcinfo->flinfo));
 288 }
 289
 290 Datum
 291 gbt_intv_same(PG_FUNCTION_ARGS)
 292 {
 293         intvKEY    *b1 = (intvKEY *) PG_GETARG_POINTER(0);
 294         intvKEY    *b2 = (intvKEY *) PG_GETARG_POINTER(1);
 295         bool       *result = (bool *) PG_GETARG_POINTER(2);
 296
 297         *result = gbt_num_same((void *) b1, (void *) b2, &tinfo, fcinfo->flinfo);
 298         PG_RETURN_POINTER(result);
 299 }