Line data    Source code

       1             : /*
       2             :  * contrib/btree_gist/btree_int2.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/rel.h"
      10             : #include "utils/sortsupport.h"
      11             : 
      12             : typedef struct int16key
      13             : {
      14             :     int16       lower;
      15             :     int16       upper;
      16             : } int16KEY;
      17             : 
      18             : /* GiST support functions */
      19           8 : PG_FUNCTION_INFO_V1(gbt_int2_compress);
      20           8 : PG_FUNCTION_INFO_V1(gbt_int2_fetch);
      21           8 : PG_FUNCTION_INFO_V1(gbt_int2_union);
      22           8 : PG_FUNCTION_INFO_V1(gbt_int2_picksplit);
      23           8 : PG_FUNCTION_INFO_V1(gbt_int2_consistent);
      24           8 : PG_FUNCTION_INFO_V1(gbt_int2_distance);
      25           8 : PG_FUNCTION_INFO_V1(gbt_int2_penalty);
      26           8 : PG_FUNCTION_INFO_V1(gbt_int2_same);
      27           8 : PG_FUNCTION_INFO_V1(gbt_int2_sortsupport);
      28             : 
      29             : 
      30             : static bool
      31        3270 : gbt_int2gt(const void *a, const void *b, FmgrInfo *flinfo)
      32             : {
      33        3270 :     return (*((const int16 *) a) > *((const int16 *) b));
      34             : }
      35             : static bool
      36        1152 : gbt_int2ge(const void *a, const void *b, FmgrInfo *flinfo)
      37             : {
      38        1152 :     return (*((const int16 *) a) >= *((const int16 *) b));
      39             : }
      40             : static bool
      41         546 : gbt_int2eq(const void *a, const void *b, FmgrInfo *flinfo)
      42             : {
      43         546 :     return (*((const int16 *) a) == *((const int16 *) b));
      44             : }
      45             : static bool
      46        1112 : gbt_int2le(const void *a, const void *b, FmgrInfo *flinfo)
      47             : {
      48        1112 :     return (*((const int16 *) a) <= *((const int16 *) b));
      49             : }
      50             : static bool
      51        2724 : gbt_int2lt(const void *a, const void *b, FmgrInfo *flinfo)
      52             : {
      53        2724 :     return (*((const int16 *) a) < *((const int16 *) b));
      54             : }
      55             : 
      56             : static int
      57        1090 : gbt_int2key_cmp(const void *a, const void *b, FmgrInfo *flinfo)
      58             : {
      59        1090 :     int16KEY   *ia = (int16KEY *) (((const Nsrt *) a)->t);
      60        1090 :     int16KEY   *ib = (int16KEY *) (((const Nsrt *) b)->t);
      61             : 
      62        1090 :     if (ia->lower == ib->lower)
      63             :     {
      64          28 :         if (ia->upper == ib->upper)
      65          28 :             return 0;
      66             : 
      67           0 :         return (ia->upper > ib->upper) ? 1 : -1;
      68             :     }
      69             : 
      70        1062 :     return (ia->lower > ib->lower) ? 1 : -1;
      71             : }
      72             : 
      73             : static float8
      74         548 : gbt_int2_dist(const void *a, const void *b, FmgrInfo *flinfo)
      75             : {
      76         548 :     return GET_FLOAT_DISTANCE(int16, a, b);
      77             : }
      78             : 
      79             : 
      80             : static const gbtree_ninfo tinfo =
      81             : {
      82             :     gbt_t_int2,
      83             :     sizeof(int16),
      84             :     4,                          /* sizeof(gbtreekey4) */
      85             :     gbt_int2gt,
      86             :     gbt_int2ge,
      87             :     gbt_int2eq,
      88             :     gbt_int2le,
      89             :     gbt_int2lt,
      90             :     gbt_int2key_cmp,
      91             :     gbt_int2_dist
      92             : };
      93             : 
      94             : 
      95           8 : PG_FUNCTION_INFO_V1(int2_dist);
      96             : Datum
      97        1098 : int2_dist(PG_FUNCTION_ARGS)
      98             : {
      99        1098 :     int16       a = PG_GETARG_INT16(0);
     100        1098 :     int16       b = PG_GETARG_INT16(1);
     101             :     int16       r;
     102             :     int16       ra;
     103             : 
     104        1098 :     if (pg_sub_s16_overflow(a, b, &r) ||
     105        1098 :         r == PG_INT16_MIN)
     106           0 :         ereport(ERROR,
     107             :                 (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
     108             :                  errmsg("smallint out of range")));
     109             : 
     110        1098 :     ra = abs(r);
     111             : 
     112        1098 :     PG_RETURN_INT16(ra);
     113             : }
     114             : 
     115             : 
     116             : /**************************************************
     117             :  * GiST support functions
     118             :  **************************************************/
     119             : 
     120             : Datum
     121        1096 : gbt_int2_compress(PG_FUNCTION_ARGS)
     122             : {
     123        1096 :     GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
     124             : 
     125        1096 :     PG_RETURN_POINTER(gbt_num_compress(entry, &tinfo));
     126             : }
     127             : 
     128             : Datum
     129         546 : gbt_int2_fetch(PG_FUNCTION_ARGS)
     130             : {
     131         546 :     GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
     132             : 
     133         546 :     PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
     134             : }
     135             : 
     136             : Datum
     137        3842 : gbt_int2_consistent(PG_FUNCTION_ARGS)
     138             : {
     139        3842 :     GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
     140        3842 :     int16       query = PG_GETARG_INT16(1);
     141        3842 :     StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
     142             : 
     143             :     /* Oid      subtype = PG_GETARG_OID(3); */
     144        3842 :     bool       *recheck = (bool *) PG_GETARG_POINTER(4);
     145        3842 :     int16KEY   *kkk = (int16KEY *) DatumGetPointer(entry->key);
     146             :     GBT_NUMKEY_R key;
     147             : 
     148             :     /* All cases served by this function are exact */
     149        3842 :     *recheck = false;
     150             : 
     151        3842 :     key.lower = (GBT_NUMKEY *) &kkk->lower;
     152        3842 :     key.upper = (GBT_NUMKEY *) &kkk->upper;
     153             : 
     154        3842 :     PG_RETURN_BOOL(gbt_num_consistent(&key, &query, &strategy,
     155             :                                       GIST_LEAF(entry), &tinfo, fcinfo->flinfo));
     156             : }
     157             : 
     158             : Datum
     159         550 : gbt_int2_distance(PG_FUNCTION_ARGS)
     160             : {
     161         550 :     GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
     162         550 :     int16       query = PG_GETARG_INT16(1);
     163             : 
     164             :     /* Oid      subtype = PG_GETARG_OID(3); */
     165         550 :     int16KEY   *kkk = (int16KEY *) DatumGetPointer(entry->key);
     166             :     GBT_NUMKEY_R key;
     167             : 
     168         550 :     key.lower = (GBT_NUMKEY *) &kkk->lower;
     169         550 :     key.upper = (GBT_NUMKEY *) &kkk->upper;
     170             : 
     171         550 :     PG_RETURN_FLOAT8(gbt_num_distance(&key, &query, GIST_LEAF(entry),
     172             :                                       &tinfo, fcinfo->flinfo));
     173             : }
     174             : 
     175             : Datum
     176           2 : gbt_int2_union(PG_FUNCTION_ARGS)
     177             : {
     178           2 :     GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
     179           2 :     void       *out = palloc(sizeof(int16KEY));
     180             : 
     181           2 :     *(int *) PG_GETARG_POINTER(1) = sizeof(int16KEY);
     182           2 :     PG_RETURN_POINTER(gbt_num_union(out, entryvec, &tinfo, fcinfo->flinfo));
     183             : }
     184             : 
     185             : Datum
     186           0 : gbt_int2_penalty(PG_FUNCTION_ARGS)
     187             : {
     188           0 :     int16KEY   *origentry = (int16KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
     189           0 :     int16KEY   *newentry = (int16KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
     190           0 :     float      *result = (float *) PG_GETARG_POINTER(2);
     191             : 
     192           0 :     penalty_num(result, origentry->lower, origentry->upper, newentry->lower, newentry->upper);
     193             : 
     194           0 :     PG_RETURN_POINTER(result);
     195             : }
     196             : 
     197             : Datum
     198           2 : gbt_int2_picksplit(PG_FUNCTION_ARGS)
     199             : {
     200           2 :     PG_RETURN_POINTER(gbt_num_picksplit((GistEntryVector *) PG_GETARG_POINTER(0),
     201             :                                         (GIST_SPLITVEC *) PG_GETARG_POINTER(1),
     202             :                                         &tinfo, fcinfo->flinfo));
     203             : }
     204             : 
     205             : Datum
     206           0 : gbt_int2_same(PG_FUNCTION_ARGS)
     207             : {
     208           0 :     int16KEY   *b1 = (int16KEY *) PG_GETARG_POINTER(0);
     209           0 :     int16KEY   *b2 = (int16KEY *) PG_GETARG_POINTER(1);
     210           0 :     bool       *result = (bool *) PG_GETARG_POINTER(2);
     211             : 
     212           0 :     *result = gbt_num_same((void *) b1, (void *) b2, &tinfo, fcinfo->flinfo);
     213           0 :     PG_RETURN_POINTER(result);
     214             : }
     215             : 
     216             : static int
     217       10148 : gbt_int2_ssup_cmp(Datum x, Datum y, SortSupport ssup)
     218             : {
     219       10148 :     int16KEY   *arg1 = (int16KEY *) DatumGetPointer(x);
     220       10148 :     int16KEY   *arg2 = (int16KEY *) DatumGetPointer(y);
     221             : 
     222             :     /* for leaf items we expect lower == upper, so only compare lower */
     223       10148 :     if (arg1->lower < arg2->lower)
     224        4712 :         return -1;
     225        5436 :     else if (arg1->lower > arg2->lower)
     226        5406 :         return 1;
     227             :     else
     228          30 :         return 0;
     229             : }
     230             : 
     231             : Datum
     232           2 : gbt_int2_sortsupport(PG_FUNCTION_ARGS)
     233             : {
     234           2 :     SortSupport ssup = (SortSupport) PG_GETARG_POINTER(0);
     235             : 
     236           2 :     ssup->comparator = gbt_int2_ssup_cmp;
     237           2 :     PG_RETURN_VOID();
     238             : }