mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-12-27 08:39:28 +08:00
7b81988f9b
- Add aligment for interval data types - Avoid floating point overflow in penalty functions Janko Richter <jankorichter@yahoo.de> and teodor
162 lines
3.9 KiB
C
162 lines
3.9 KiB
C
#include "btree_gist.h"
|
|
#include "btree_utils_num.h"
|
|
|
|
typedef struct int16key
|
|
{
|
|
int16 lower;
|
|
int16 upper;
|
|
} int16KEY;
|
|
|
|
/*
|
|
** int16 ops
|
|
*/
|
|
PG_FUNCTION_INFO_V1(gbt_int2_compress);
|
|
PG_FUNCTION_INFO_V1(gbt_int2_union);
|
|
PG_FUNCTION_INFO_V1(gbt_int2_picksplit);
|
|
PG_FUNCTION_INFO_V1(gbt_int2_consistent);
|
|
PG_FUNCTION_INFO_V1(gbt_int2_penalty);
|
|
PG_FUNCTION_INFO_V1(gbt_int2_same);
|
|
|
|
Datum gbt_int2_compress(PG_FUNCTION_ARGS);
|
|
Datum gbt_int2_union(PG_FUNCTION_ARGS);
|
|
Datum gbt_int2_picksplit(PG_FUNCTION_ARGS);
|
|
Datum gbt_int2_consistent(PG_FUNCTION_ARGS);
|
|
Datum gbt_int2_penalty(PG_FUNCTION_ARGS);
|
|
Datum gbt_int2_same(PG_FUNCTION_ARGS);
|
|
|
|
static bool gbt_int2gt (const void *a, const void *b)
|
|
{
|
|
return ( *((int16*)a) > *((int16*)b) );
|
|
}
|
|
static bool gbt_int2ge (const void *a, const void *b)
|
|
{
|
|
return ( *((int16*)a) >= *((int16*)b) );
|
|
}
|
|
static bool gbt_int2eq (const void *a, const void *b)
|
|
{
|
|
return ( *((int16*)a) == *((int16*)b) );
|
|
}
|
|
static bool gbt_int2le (const void *a, const void *b)
|
|
{
|
|
return ( *((int16*)a) <= *((int16*)b) );
|
|
}
|
|
static bool gbt_int2lt (const void *a, const void *b)
|
|
{
|
|
return ( *((int16*)a) < *((int16*)b) );
|
|
}
|
|
|
|
static int
|
|
gbt_int2key_cmp(const void *a, const void *b)
|
|
{
|
|
|
|
if ( *(int16*)(&((Nsrt *) a)->t[0]) > *(int16*)&(((Nsrt *) b)->t[0]) ){
|
|
return 1;
|
|
} else
|
|
if ( *(int16*)&(((Nsrt *) a)->t[0]) < *(int16*)&(((Nsrt *) b)->t[0]) ){
|
|
return -1;
|
|
}
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
static const gbtree_ninfo tinfo =
|
|
{
|
|
gbt_t_int2,
|
|
sizeof(int16),
|
|
gbt_int2gt,
|
|
gbt_int2ge,
|
|
gbt_int2eq,
|
|
gbt_int2le,
|
|
gbt_int2lt,
|
|
gbt_int2key_cmp
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**************************************************
|
|
* int16 ops
|
|
**************************************************/
|
|
|
|
|
|
Datum
|
|
gbt_int2_compress(PG_FUNCTION_ARGS)
|
|
{
|
|
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
|
|
GISTENTRY *retval = NULL;
|
|
PG_RETURN_POINTER( gbt_num_compress( retval , entry , &tinfo ));
|
|
}
|
|
|
|
|
|
Datum
|
|
gbt_int2_consistent(PG_FUNCTION_ARGS)
|
|
{
|
|
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
|
|
int16 query = PG_GETARG_INT16(1);
|
|
int16KEY *kkk = (int16KEY *) DatumGetPointer(entry->key);
|
|
GBT_NUMKEY_R key ;
|
|
StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
|
|
key.lower = (GBT_NUMKEY*) &kkk->lower ;
|
|
key.upper = (GBT_NUMKEY*) &kkk->upper ;
|
|
|
|
PG_RETURN_BOOL(
|
|
gbt_num_consistent( &key, (void*)&query,&strategy,GIST_LEAF(entry),&tinfo)
|
|
);
|
|
}
|
|
|
|
|
|
Datum
|
|
gbt_int2_union(PG_FUNCTION_ARGS)
|
|
{
|
|
GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
|
|
void *out = palloc(sizeof(int16KEY));
|
|
*(int *) PG_GETARG_POINTER(1) = sizeof(int16KEY);
|
|
PG_RETURN_POINTER( gbt_num_union ( (void*)out, entryvec, &tinfo ) );
|
|
}
|
|
|
|
|
|
Datum
|
|
gbt_int2_penalty(PG_FUNCTION_ARGS)
|
|
{
|
|
int16KEY *origentry = (int16KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
|
|
int16KEY *newentry = (int16KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
|
|
float *result = (float *) PG_GETARG_POINTER(2);
|
|
int2 res ;
|
|
|
|
*result = 0.0;
|
|
|
|
penalty_range_enlarge ( origentry->lower, origentry->upper, newentry->lower, newentry->upper );
|
|
|
|
if ( res > 0 ){
|
|
*result += FLT_MIN ;
|
|
*result += (float) ( res / ( (double) ( res + origentry->upper - origentry->lower ) ) );
|
|
*result *= ( FLT_MAX / ( ( (GISTENTRY *) PG_GETARG_POINTER(0))->rel->rd_att->natts + 1 ) );
|
|
}
|
|
|
|
PG_RETURN_POINTER(result);
|
|
}
|
|
|
|
Datum
|
|
gbt_int2_picksplit(PG_FUNCTION_ARGS)
|
|
{
|
|
PG_RETURN_POINTER(gbt_num_picksplit(
|
|
(GistEntryVector *) PG_GETARG_POINTER(0),
|
|
(GIST_SPLITVEC *) PG_GETARG_POINTER(1),
|
|
&tinfo
|
|
));
|
|
}
|
|
|
|
Datum
|
|
gbt_int2_same(PG_FUNCTION_ARGS)
|
|
{
|
|
int16KEY *b1 = (int16KEY *) PG_GETARG_POINTER(0);
|
|
int16KEY *b2 = (int16KEY *) PG_GETARG_POINTER(1);
|
|
bool *result = (bool *) PG_GETARG_POINTER(2);
|
|
|
|
*result = gbt_num_same ( (void*)b1, (void*)b2, &tinfo );
|
|
PG_RETURN_POINTER(result);
|
|
}
|