contrib/btree_gist/btree_interval.c

   1 /*
   2  * $PostgreSQL$
   3  */
   4 #include "btree_gist.h"
   5 #include "btree_utils_num.h"
   6 #include "utils/timestamp.h"
   7
   8 typedef struct
   9 {
  10         Interval        lower,
  11                                 upper;
  12 } intvKEY;
  13
  14
  15 /*
  16 ** Interval ops
  17 */
  18 PG_FUNCTION_INFO_V1(gbt_intv_compress);
  19 PG_FUNCTION_INFO_V1(gbt_intv_decompress);
  20 PG_FUNCTION_INFO_V1(gbt_intv_union);
  21 PG_FUNCTION_INFO_V1(gbt_intv_picksplit);
  22 PG_FUNCTION_INFO_V1(gbt_intv_consistent);
  23 PG_FUNCTION_INFO_V1(gbt_intv_penalty);
  24 PG_FUNCTION_INFO_V1(gbt_intv_same);
  25
  26 Datum           gbt_intv_compress(PG_FUNCTION_ARGS);
  27 Datum           gbt_intv_decompress(PG_FUNCTION_ARGS);
  28 Datum           gbt_intv_union(PG_FUNCTION_ARGS);
  29 Datum           gbt_intv_picksplit(PG_FUNCTION_ARGS);
  30 Datum           gbt_intv_consistent(PG_FUNCTION_ARGS);
  31 Datum           gbt_intv_penalty(PG_FUNCTION_ARGS);
  32 Datum           gbt_intv_same(PG_FUNCTION_ARGS);
  33
  34
  35 static bool
  36 gbt_intvgt(const void *a, const void *b)
  37 {
  38         return DatumGetBool(DirectFunctionCall2(interval_gt, IntervalPGetDatum(a), IntervalPGetDatum(b)));
  39 }
  40
  41 static bool
  42 gbt_intvge(const void *a, const void *b)
  43 {
  44         return DatumGetBool(DirectFunctionCall2(interval_ge, IntervalPGetDatum(a), IntervalPGetDatum(b)));
  45 }
  46
  47 static bool
  48 gbt_intveq(const void *a, const void *b)
  49 {
  50         return DatumGetBool(DirectFunctionCall2(interval_eq, IntervalPGetDatum(a), IntervalPGetDatum(b)));
  51 }
  52
  53 static bool
  54 gbt_intvle(const void *a, const void *b)
  55 {
  56         return DatumGetBool(DirectFunctionCall2(interval_le, IntervalPGetDatum(a), IntervalPGetDatum(b)));
  57 }
  58
  59 static bool
  60 gbt_intvlt(const void *a, const void *b)
  61 {
  62         return DatumGetBool(DirectFunctionCall2(interval_lt, IntervalPGetDatum(a), IntervalPGetDatum(b)));
  63 }
  64
  65 static int
  66 gbt_intvkey_cmp(const void *a, const void *b)
  67 {
  68         return DatumGetInt32(
  69                                                  DirectFunctionCall2(interval_cmp,
  70                                                                                   IntervalPGetDatum(((Nsrt *) a)->t),
  71                                                                                    IntervalPGetDatum(((Nsrt *) b)->t)
  72                                                                                          )
  73                 );
  74 }
  75
  76
  77 static double
  78 intr2num(const Interval *i)
  79 {
  80         return INTERVAL_TO_SEC(i);
  81 }
  82
  83 /*
  84  * INTERVALSIZE should be the actual size-on-disk of an Interval, as shown
  85  * in pg_type.  This might be less than sizeof(Interval) if the compiler
  86  * insists on adding alignment padding at the end of the struct.
  87  */
  88 #define INTERVALSIZE 16
  89
  90 static const gbtree_ninfo tinfo =
  91 {
  92         gbt_t_intv,
  93         sizeof(Interval),
  94         gbt_intvgt,
  95         gbt_intvge,
  96         gbt_intveq,
  97         gbt_intvle,
  98         gbt_intvlt,
  99         gbt_intvkey_cmp
 100 };
 101
 102
 103 /**************************************************
 104  * interval ops
 105  **************************************************/
 106
 107
 108 Datum
 109 gbt_intv_compress(PG_FUNCTION_ARGS)
 110 {
 111         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 112         GISTENTRY  *retval = entry;
 113
 114         if (entry->leafkey || INTERVALSIZE != sizeof(Interval))
 115         {
 116                 char       *r = (char *) palloc(2 * INTERVALSIZE);
 117
 118                 retval = palloc(sizeof(GISTENTRY));
 119
 120                 if (entry->leafkey)
 121                 {
 122                         Interval   *key = DatumGetIntervalP(entry->key);
 123
 124                         memcpy((void *) r, (void *) key, INTERVALSIZE);
 125                         memcpy((void *) (r + INTERVALSIZE), (void *) key, INTERVALSIZE);
 126                 }
 127                 else
 128                 {
 129                         intvKEY    *key = (intvKEY *) DatumGetPointer(entry->key);
 130
 131                         memcpy(r, &key->lower, INTERVALSIZE);
 132                         memcpy(r + INTERVALSIZE, &key->upper, INTERVALSIZE);
 133                 }
 134                 gistentryinit(*retval, PointerGetDatum(r),
 135                                           entry->rel, entry->page,
 136                                           entry->offset, FALSE);
 137         }
 138
 139         PG_RETURN_POINTER(retval);
 140
 141 }
 142
 143 Datum
 144 gbt_intv_decompress(PG_FUNCTION_ARGS)
 145 {
 146         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 147         GISTENTRY  *retval = entry;
 148
 149         if (INTERVALSIZE != sizeof(Interval))
 150         {
 151                 intvKEY    *r = palloc(sizeof(intvKEY));
 152                 char       *key = DatumGetPointer(entry->key);
 153
 154                 retval = palloc(sizeof(GISTENTRY));
 155                 memcpy(&r->lower, key, INTERVALSIZE);
 156                 memcpy(&r->upper, key + INTERVALSIZE, INTERVALSIZE);
 157
 158                 gistentryinit(*retval, PointerGetDatum(r),
 159                                           entry->rel, entry->page,
 160                                           entry->offset, FALSE);
 161         }
 162         PG_RETURN_POINTER(retval);
 163 }
 164
 165
 166 Datum
 167 gbt_intv_consistent(PG_FUNCTION_ARGS)
 168 {
 169         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 170         Interval   *query = PG_GETARG_INTERVAL_P(1);
 171         StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
 172
 173         /* Oid          subtype = PG_GETARG_OID(3); */
 174         bool       *recheck = (bool *) PG_GETARG_POINTER(4);
 175         intvKEY    *kkk = (intvKEY *) DatumGetPointer(entry->key);
 176         GBT_NUMKEY_R key;
 177
 178         /* All cases served by this function are exact */
 179         *recheck = false;
 180
 181         key.lower = (GBT_NUMKEY *) &kkk->lower;
 182         key.upper = (GBT_NUMKEY *) &kkk->upper;
 183
 184         PG_RETURN_BOOL(
 185                                    gbt_num_consistent(&key, (void *) query, &strategy, GIST_LEAF(entry), &tinfo)
 186                 );
 187 }
 188
 189
 190 Datum
 191 gbt_intv_union(PG_FUNCTION_ARGS)
 192 {
 193         GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
 194         void       *out = palloc(sizeof(intvKEY));
 195
 196         *(int *) PG_GETARG_POINTER(1) = sizeof(intvKEY);
 197         PG_RETURN_POINTER(gbt_num_union((void *) out, entryvec, &tinfo));
 198 }
 199
 200
 201 Datum
 202 gbt_intv_penalty(PG_FUNCTION_ARGS)
 203 {
 204         intvKEY    *origentry = (intvKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
 205         intvKEY    *newentry = (intvKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
 206         float      *result = (float *) PG_GETARG_POINTER(2);
 207         double          iorg[2],
 208                                 inew[2];
 209
 210         iorg[0] = intr2num(&origentry->lower);
 211         iorg[1] = intr2num(&origentry->upper);
 212         inew[0] = intr2num(&newentry->lower);
 213         inew[1] = intr2num(&newentry->upper);
 214
 215         penalty_num(result, iorg[0], iorg[1], inew[0], inew[1]);
 216
 217         PG_RETURN_POINTER(result);
 218
 219 }
 220
 221 Datum
 222 gbt_intv_picksplit(PG_FUNCTION_ARGS)
 223 {
 224         PG_RETURN_POINTER(gbt_num_picksplit(
 225                                                                         (GistEntryVector *) PG_GETARG_POINTER(0),
 226                                                                           (GIST_SPLITVEC *) PG_GETARG_POINTER(1),
 227                                                                                 &tinfo
 228                                                                                 ));
 229 }
 230
 231 Datum
 232 gbt_intv_same(PG_FUNCTION_ARGS)
 233 {
 234         intvKEY    *b1 = (intvKEY *) PG_GETARG_POINTER(0);
 235         intvKEY    *b2 = (intvKEY *) PG_GETARG_POINTER(1);
 236         bool       *result = (bool *) PG_GETARG_POINTER(2);
 237
 238         *result = gbt_num_same((void *) b1, (void *) b2, &tinfo);
 239         PG_RETURN_POINTER(result);
 240 }