mirror of https://github.com/postgres/postgres
169 lines
3.7 KiB
C
169 lines
3.7 KiB
C
#include "btree_gist.h"
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#include "btree_utils_num.h"
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typedef struct int16key
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{
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int16 lower;
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int16 upper;
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} int16KEY;
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/*
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** int16 ops
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*/
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PG_FUNCTION_INFO_V1(gbt_int2_compress);
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PG_FUNCTION_INFO_V1(gbt_int2_union);
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PG_FUNCTION_INFO_V1(gbt_int2_picksplit);
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PG_FUNCTION_INFO_V1(gbt_int2_consistent);
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PG_FUNCTION_INFO_V1(gbt_int2_penalty);
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PG_FUNCTION_INFO_V1(gbt_int2_same);
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Datum gbt_int2_compress(PG_FUNCTION_ARGS);
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Datum gbt_int2_union(PG_FUNCTION_ARGS);
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Datum gbt_int2_picksplit(PG_FUNCTION_ARGS);
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Datum gbt_int2_consistent(PG_FUNCTION_ARGS);
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Datum gbt_int2_penalty(PG_FUNCTION_ARGS);
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Datum gbt_int2_same(PG_FUNCTION_ARGS);
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static bool
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gbt_int2gt(const void *a, const void *b)
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{
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return (*((int16 *) a) > *((int16 *) b));
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}
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static bool
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gbt_int2ge(const void *a, const void *b)
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{
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return (*((int16 *) a) >= *((int16 *) b));
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}
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static bool
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gbt_int2eq(const void *a, const void *b)
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{
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return (*((int16 *) a) == *((int16 *) b));
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}
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static bool
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gbt_int2le(const void *a, const void *b)
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{
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return (*((int16 *) a) <= *((int16 *) b));
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}
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static bool
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gbt_int2lt(const void *a, const void *b)
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{
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return (*((int16 *) a) < *((int16 *) b));
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}
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static int
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gbt_int2key_cmp(const void *a, const void *b)
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{
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if (*(int16 *) (&((Nsrt *) a)->t[0]) > *(int16 *) &(((Nsrt *) b)->t[0]))
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return 1;
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else if (*(int16 *) &(((Nsrt *) a)->t[0]) < *(int16 *) &(((Nsrt *) b)->t[0]))
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return -1;
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return 0;
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}
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static const gbtree_ninfo tinfo =
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{
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gbt_t_int2,
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sizeof(int16),
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gbt_int2gt,
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gbt_int2ge,
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gbt_int2eq,
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gbt_int2le,
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gbt_int2lt,
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gbt_int2key_cmp
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};
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/**************************************************
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* int16 ops
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**************************************************/
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Datum
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gbt_int2_compress(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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GISTENTRY *retval = NULL;
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PG_RETURN_POINTER(gbt_num_compress(retval, entry, &tinfo));
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}
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Datum
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gbt_int2_consistent(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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int16 query = PG_GETARG_INT16(1);
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int16KEY *kkk = (int16KEY *) DatumGetPointer(entry->key);
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GBT_NUMKEY_R key;
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StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
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key.lower = (GBT_NUMKEY *) & kkk->lower;
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key.upper = (GBT_NUMKEY *) & kkk->upper;
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PG_RETURN_BOOL(
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gbt_num_consistent(&key, (void *) &query, &strategy, GIST_LEAF(entry), &tinfo)
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);
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}
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Datum
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gbt_int2_union(PG_FUNCTION_ARGS)
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{
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GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
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void *out = palloc(sizeof(int16KEY));
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*(int *) PG_GETARG_POINTER(1) = sizeof(int16KEY);
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PG_RETURN_POINTER(gbt_num_union((void *) out, entryvec, &tinfo));
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}
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Datum
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gbt_int2_penalty(PG_FUNCTION_ARGS)
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{
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int16KEY *origentry = (int16KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
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int16KEY *newentry = (int16KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
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float *result = (float *) PG_GETARG_POINTER(2);
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int2 res;
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*result = 0.0;
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penalty_range_enlarge(origentry->lower, origentry->upper, newentry->lower, newentry->upper);
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if (res > 0)
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{
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*result += FLT_MIN;
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*result += (float) (res / ((double) (res + origentry->upper - origentry->lower)));
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*result *= (FLT_MAX / (((GISTENTRY *) PG_GETARG_POINTER(0))->rel->rd_att->natts + 1));
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}
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PG_RETURN_POINTER(result);
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}
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Datum
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gbt_int2_picksplit(PG_FUNCTION_ARGS)
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{
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PG_RETURN_POINTER(gbt_num_picksplit(
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(GistEntryVector *) PG_GETARG_POINTER(0),
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(GIST_SPLITVEC *) PG_GETARG_POINTER(1),
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&tinfo
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));
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}
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Datum
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gbt_int2_same(PG_FUNCTION_ARGS)
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{
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int16KEY *b1 = (int16KEY *) PG_GETARG_POINTER(0);
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int16KEY *b2 = (int16KEY *) PG_GETARG_POINTER(1);
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bool *result = (bool *) PG_GETARG_POINTER(2);
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*result = gbt_num_same((void *) b1, (void *) b2, &tinfo);
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PG_RETURN_POINTER(result);
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}
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