postgresql/contrib/btree_gist/btree_time.c
Teodor Sigaev 7b81988f9b - Add aligment of variable data types
- Add aligment for interval data types
- Avoid floating point overflow in penalty functions
Janko Richter <jankorichter@yahoo.de> and teodor
2004-06-03 12:26:10 +00:00

252 lines
6.7 KiB
C

#include "btree_gist.h"
#include "btree_utils_num.h"
#include "utils/date.h"
typedef struct
{
TimeADT lower;
TimeADT upper;
} timeKEY;
/*
** time ops
*/
PG_FUNCTION_INFO_V1(gbt_time_compress);
PG_FUNCTION_INFO_V1(gbt_timetz_compress);
PG_FUNCTION_INFO_V1(gbt_time_union);
PG_FUNCTION_INFO_V1(gbt_time_picksplit);
PG_FUNCTION_INFO_V1(gbt_time_consistent);
PG_FUNCTION_INFO_V1(gbt_timetz_consistent);
PG_FUNCTION_INFO_V1(gbt_time_penalty);
PG_FUNCTION_INFO_V1(gbt_time_same);
Datum gbt_time_compress(PG_FUNCTION_ARGS);
Datum gbt_timetz_compress(PG_FUNCTION_ARGS);
Datum gbt_time_union(PG_FUNCTION_ARGS);
Datum gbt_time_picksplit(PG_FUNCTION_ARGS);
Datum gbt_time_consistent(PG_FUNCTION_ARGS);
Datum gbt_timetz_consistent(PG_FUNCTION_ARGS);
Datum gbt_time_penalty(PG_FUNCTION_ARGS);
Datum gbt_time_same(PG_FUNCTION_ARGS);
static bool gbt_timegt (const void *a, const void *b)
{
return DatumGetBool(
DirectFunctionCall2(time_gt,TimeADTGetDatum( *((TimeADT*)a) ), TimeADTGetDatum( *((TimeADT*)b) ) )
);
}
static bool gbt_timege (const void *a, const void *b)
{
return DatumGetBool(
DirectFunctionCall2(time_ge,TimeADTGetDatum( *((TimeADT*)a) ), TimeADTGetDatum( *((TimeADT*)b) ) )
);
}
static bool gbt_timeeq (const void *a, const void *b)
{
return DatumGetBool(
DirectFunctionCall2(time_eq,TimeADTGetDatum( *((TimeADT*)a) ), TimeADTGetDatum( *((TimeADT*)b) ) )
);
}
static bool gbt_timele (const void *a, const void *b)
{
return DatumGetBool(
DirectFunctionCall2(time_le,TimeADTGetDatum( *((TimeADT*)a) ), TimeADTGetDatum( *((TimeADT*)b) ) )
);
}
static bool gbt_timelt (const void *a, const void *b)
{
return DatumGetBool(
DirectFunctionCall2(time_lt,TimeADTGetDatum( *((TimeADT*)a) ), TimeADTGetDatum( *((TimeADT*)b) ) )
);
}
static int
gbt_timekey_cmp(const void *a, const void *b)
{
if ( gbt_timegt( (void*)&(((Nsrt *) a)->t[0]) , (void*)&(((Nsrt *) b)->t[0]) ) ){
return 1;
} else
if ( gbt_timelt( (void*)&(((Nsrt *) a)->t[0]) , (void*)&(((Nsrt *) b)->t[0]) ) ){
return -1;
}
return 0;
}
static const gbtree_ninfo tinfo =
{
gbt_t_time,
sizeof(TimeADT),
gbt_timegt,
gbt_timege,
gbt_timeeq,
gbt_timele,
gbt_timelt,
gbt_timekey_cmp
};
/**************************************************
* time ops
**************************************************/
Datum
gbt_time_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_timetz_compress(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
GISTENTRY *retval;
if (entry->leafkey)
{
timeKEY *r = (timeKEY *) palloc(sizeof(timeKEY));
TimeTzADT *tz = DatumGetTimeTzADTP(entry->key);
retval = palloc(sizeof(GISTENTRY));
/* We are using the time + zone only to compress */
r->lower = r->upper = ( tz->time + tz->zone ) ;
gistentryinit(*retval, PointerGetDatum(r),
entry->rel, entry->page,
entry->offset, sizeof(timeKEY), FALSE);
}
else
retval = entry;
PG_RETURN_POINTER(retval);
}
Datum
gbt_time_consistent(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
TimeADT query = PG_GETARG_TIMEADT( 1 );
timeKEY *kkk = (timeKEY*) 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_timetz_consistent(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
TimeTzADT *query = PG_GETARG_TIMETZADT_P( 1 );
TimeADT qqq = query->time + query->zone ;
timeKEY *kkk = (timeKEY*) 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*)&qqq, &strategy,GIST_LEAF(entry),&tinfo)
);
}
Datum
gbt_time_union(PG_FUNCTION_ARGS)
{
GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
void *out = palloc(sizeof(timeKEY));
*(int *) PG_GETARG_POINTER(1) = sizeof(timeKEY);
PG_RETURN_POINTER( gbt_num_union ( (void*)out, entryvec, &tinfo ) );
}
Datum
gbt_time_penalty(PG_FUNCTION_ARGS)
{
timeKEY *origentry = (timeKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
timeKEY *newentry = (timeKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
float *result = (float *) PG_GETARG_POINTER(2);
Interval *intr;
#ifdef HAVE_INT64_TIMESTAMP
int64 res;
#else
double res;
#endif
intr = DatumGetIntervalP(DirectFunctionCall2(
time_mi_time,
TimeADTGetDatum(newentry->upper),
TimeADTGetDatum(origentry->upper)));
/* see interval_larger */
res = Max(intr->time + intr->month * (30 * 86400), 0);
pfree(intr);
intr = DatumGetIntervalP(DirectFunctionCall2(
time_mi_time,
TimeADTGetDatum(origentry->lower),
TimeADTGetDatum(newentry->lower)));
/* see interval_larger */
res += Max(intr->time + intr->month * (30 * 86400), 0);
pfree(intr);
*result = 0.0;
if ( res > 0 ){
intr = DatumGetIntervalP(DirectFunctionCall2(
time_mi_time,
TimeADTGetDatum(origentry->upper),
TimeADTGetDatum(origentry->lower)));
*result += FLT_MIN ;
*result += (float) ( res / ( (double) ( res + intr->time + intr->month * (30 * 86400) ) ) );
*result *= ( FLT_MAX / ( ( (GISTENTRY *) PG_GETARG_POINTER(0))->rel->rd_att->natts + 1 ) );
pfree ( intr );
}
PG_RETURN_POINTER(result);
}
Datum
gbt_time_picksplit(PG_FUNCTION_ARGS)
{
PG_RETURN_POINTER(gbt_num_picksplit(
(GistEntryVector *) PG_GETARG_POINTER(0),
(GIST_SPLITVEC *) PG_GETARG_POINTER(1),
&tinfo
));
}
Datum
gbt_time_same(PG_FUNCTION_ARGS)
{
timeKEY *b1 = (timeKEY *) PG_GETARG_POINTER(0);
timeKEY *b2 = (timeKEY *) PG_GETARG_POINTER(1);
bool *result = (bool *) PG_GETARG_POINTER(2);
*result = gbt_num_same ( (void*)b1, (void*)b2, &tinfo );
PG_RETURN_POINTER(result);
}