Line data    Source code

       1             : /*
       2             :  * contrib/btree_gist/btree_oid.c
       3             :  */
       4             : #include "postgres.h"
       5             : 
       6             : #include "btree_gist.h"
       7             : #include "btree_utils_num.h"
       8             : #include "utils/sortsupport.h"
       9             : 
      10             : typedef struct
      11             : {
      12             :     Oid         lower;
      13             :     Oid         upper;
      14             : } oidKEY;
      15             : 
      16             : /* GiST support functions */
      17           4 : PG_FUNCTION_INFO_V1(gbt_oid_compress);
      18           4 : PG_FUNCTION_INFO_V1(gbt_oid_fetch);
      19           4 : PG_FUNCTION_INFO_V1(gbt_oid_union);
      20           4 : PG_FUNCTION_INFO_V1(gbt_oid_picksplit);
      21           4 : PG_FUNCTION_INFO_V1(gbt_oid_consistent);
      22           4 : PG_FUNCTION_INFO_V1(gbt_oid_distance);
      23           4 : PG_FUNCTION_INFO_V1(gbt_oid_penalty);
      24           4 : PG_FUNCTION_INFO_V1(gbt_oid_same);
      25           4 : PG_FUNCTION_INFO_V1(gbt_oid_sortsupport);
      26             : 
      27             : 
      28             : static bool
      29        4488 : gbt_oidgt(const void *a, const void *b, FmgrInfo *flinfo)
      30             : {
      31        4488 :     return (*((const Oid *) a) > *((const Oid *) b));
      32             : }
      33             : static bool
      34         516 : gbt_oidge(const void *a, const void *b, FmgrInfo *flinfo)
      35             : {
      36         516 :     return (*((const Oid *) a) >= *((const Oid *) b));
      37             : }
      38             : static bool
      39         500 : gbt_oideq(const void *a, const void *b, FmgrInfo *flinfo)
      40             : {
      41         500 :     return (*((const Oid *) a) == *((const Oid *) b));
      42             : }
      43             : static bool
      44        2026 : gbt_oidle(const void *a, const void *b, FmgrInfo *flinfo)
      45             : {
      46        2026 :     return (*((const Oid *) a) <= *((const Oid *) b));
      47             : }
      48             : static bool
      49        5988 : gbt_oidlt(const void *a, const void *b, FmgrInfo *flinfo)
      50             : {
      51        5988 :     return (*((const Oid *) a) < *((const Oid *) b));
      52             : }
      53             : 
      54             : static int
      55        3994 : gbt_oidkey_cmp(const void *a, const void *b, FmgrInfo *flinfo)
      56             : {
      57        3994 :     oidKEY     *ia = (oidKEY *) (((const Nsrt *) a)->t);
      58        3994 :     oidKEY     *ib = (oidKEY *) (((const Nsrt *) b)->t);
      59             : 
      60        3994 :     if (ia->lower == ib->lower)
      61             :     {
      62           0 :         if (ia->upper == ib->upper)
      63           0 :             return 0;
      64             : 
      65           0 :         return (ia->upper > ib->upper) ? 1 : -1;
      66             :     }
      67             : 
      68        3994 :     return (ia->lower > ib->lower) ? 1 : -1;
      69             : }
      70             : 
      71             : static float8
      72           0 : gbt_oid_dist(const void *a, const void *b, FmgrInfo *flinfo)
      73             : {
      74           0 :     Oid         aa = *(const Oid *) a;
      75           0 :     Oid         bb = *(const Oid *) b;
      76             : 
      77           0 :     if (aa < bb)
      78           0 :         return (float8) (bb - aa);
      79             :     else
      80           0 :         return (float8) (aa - bb);
      81             : }
      82             : 
      83             : 
      84             : static const gbtree_ninfo tinfo =
      85             : {
      86             :     gbt_t_oid,
      87             :     sizeof(Oid),
      88             :     8,                          /* sizeof(gbtreekey8) */
      89             :     gbt_oidgt,
      90             :     gbt_oidge,
      91             :     gbt_oideq,
      92             :     gbt_oidle,
      93             :     gbt_oidlt,
      94             :     gbt_oidkey_cmp,
      95             :     gbt_oid_dist
      96             : };
      97             : 
      98             : 
      99           2 : PG_FUNCTION_INFO_V1(oid_dist);
     100             : Datum
     101           0 : oid_dist(PG_FUNCTION_ARGS)
     102             : {
     103           0 :     Oid         a = PG_GETARG_OID(0);
     104           0 :     Oid         b = PG_GETARG_OID(1);
     105             :     Oid         res;
     106             : 
     107           0 :     if (a < b)
     108           0 :         res = b - a;
     109             :     else
     110           0 :         res = a - b;
     111           0 :     PG_RETURN_OID(res);
     112             : }
     113             : 
     114             : 
     115             : /**************************************************
     116             :  * GiST support functions
     117             :  **************************************************/
     118             : 
     119             : Datum
     120        2008 : gbt_oid_compress(PG_FUNCTION_ARGS)
     121             : {
     122        2008 :     GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
     123             : 
     124        2008 :     PG_RETURN_POINTER(gbt_num_compress(entry, &tinfo));
     125             : }
     126             : 
     127             : Datum
     128           0 : gbt_oid_fetch(PG_FUNCTION_ARGS)
     129             : {
     130           0 :     GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
     131             : 
     132           0 :     PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
     133             : }
     134             : 
     135             : Datum
     136        5540 : gbt_oid_consistent(PG_FUNCTION_ARGS)
     137             : {
     138        5540 :     GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
     139        5540 :     Oid         query = PG_GETARG_OID(1);
     140        5540 :     StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
     141             : 
     142             :     /* Oid      subtype = PG_GETARG_OID(3); */
     143        5540 :     bool       *recheck = (bool *) PG_GETARG_POINTER(4);
     144        5540 :     oidKEY     *kkk = (oidKEY *) DatumGetPointer(entry->key);
     145             :     GBT_NUMKEY_R key;
     146             : 
     147             :     /* All cases served by this function are exact */
     148        5540 :     *recheck = false;
     149             : 
     150        5540 :     key.lower = (GBT_NUMKEY *) &kkk->lower;
     151        5540 :     key.upper = (GBT_NUMKEY *) &kkk->upper;
     152             : 
     153        5540 :     PG_RETURN_BOOL(gbt_num_consistent(&key, &query, &strategy,
     154             :                                       GIST_LEAF(entry), &tinfo, fcinfo->flinfo));
     155             : }
     156             : 
     157             : Datum
     158           0 : gbt_oid_distance(PG_FUNCTION_ARGS)
     159             : {
     160           0 :     GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
     161           0 :     Oid         query = PG_GETARG_OID(1);
     162             : 
     163             :     /* Oid      subtype = PG_GETARG_OID(3); */
     164           0 :     oidKEY     *kkk = (oidKEY *) DatumGetPointer(entry->key);
     165             :     GBT_NUMKEY_R key;
     166             : 
     167           0 :     key.lower = (GBT_NUMKEY *) &kkk->lower;
     168           0 :     key.upper = (GBT_NUMKEY *) &kkk->upper;
     169             : 
     170           0 :     PG_RETURN_FLOAT8(gbt_num_distance(&key, &query, GIST_LEAF(entry),
     171             :                                       &tinfo, fcinfo->flinfo));
     172             : }
     173             : 
     174             : Datum
     175           0 : gbt_oid_union(PG_FUNCTION_ARGS)
     176             : {
     177           0 :     GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
     178           0 :     void       *out = palloc(sizeof(oidKEY));
     179             : 
     180           0 :     *(int *) PG_GETARG_POINTER(1) = sizeof(oidKEY);
     181           0 :     PG_RETURN_POINTER(gbt_num_union(out, entryvec, &tinfo, fcinfo->flinfo));
     182             : }
     183             : 
     184             : Datum
     185           0 : gbt_oid_penalty(PG_FUNCTION_ARGS)
     186             : {
     187           0 :     oidKEY     *origentry = (oidKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
     188           0 :     oidKEY     *newentry = (oidKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
     189           0 :     float      *result = (float *) PG_GETARG_POINTER(2);
     190             : 
     191           0 :     penalty_num(result, origentry->lower, origentry->upper, newentry->lower, newentry->upper);
     192             : 
     193           0 :     PG_RETURN_POINTER(result);
     194             : }
     195             : 
     196             : Datum
     197           6 : gbt_oid_picksplit(PG_FUNCTION_ARGS)
     198             : {
     199           6 :     PG_RETURN_POINTER(gbt_num_picksplit((GistEntryVector *) PG_GETARG_POINTER(0),
     200             :                                         (GIST_SPLITVEC *) PG_GETARG_POINTER(1),
     201             :                                         &tinfo, fcinfo->flinfo));
     202             : }
     203             : 
     204             : Datum
     205           0 : gbt_oid_same(PG_FUNCTION_ARGS)
     206             : {
     207           0 :     oidKEY     *b1 = (oidKEY *) PG_GETARG_POINTER(0);
     208           0 :     oidKEY     *b2 = (oidKEY *) PG_GETARG_POINTER(1);
     209           0 :     bool       *result = (bool *) PG_GETARG_POINTER(2);
     210             : 
     211           0 :     *result = gbt_num_same((void *) b1, (void *) b2, &tinfo, fcinfo->flinfo);
     212           0 :     PG_RETURN_POINTER(result);
     213             : }
     214             : 
     215             : static int
     216        1998 : gbt_oid_ssup_cmp(Datum x, Datum y, SortSupport ssup)
     217             : {
     218        1998 :     oidKEY     *arg1 = (oidKEY *) DatumGetPointer(x);
     219        1998 :     oidKEY     *arg2 = (oidKEY *) DatumGetPointer(y);
     220             : 
     221             :     /* for leaf items we expect lower == upper, so only compare lower */
     222        1998 :     if (arg1->lower > arg2->lower)
     223           0 :         return 1;
     224        1998 :     else if (arg1->lower < arg2->lower)
     225        1998 :         return -1;
     226             :     else
     227           0 :         return 0;
     228             : }
     229             : 
     230             : Datum
     231           2 : gbt_oid_sortsupport(PG_FUNCTION_ARGS)
     232             : {
     233           2 :     SortSupport ssup = (SortSupport) PG_GETARG_POINTER(0);
     234             : 
     235           2 :     ssup->comparator = gbt_oid_ssup_cmp;
     236           2 :     ssup->ssup_extra = NULL;
     237             : 
     238           2 :     PG_RETURN_VOID();
     239             : }