postgresql/contrib/btree_gist/btree_ts.c

282 lines
6.9 KiB
C
Raw Normal View History

#include "btree_gist.h"
#include "btree_utils_num.h"
typedef struct
{
Timestamp lower;
Timestamp upper;
} tsKEY;
/*
** timestamp ops
*/
PG_FUNCTION_INFO_V1(gbt_ts_compress);
PG_FUNCTION_INFO_V1(gbt_tstz_compress);
PG_FUNCTION_INFO_V1(gbt_ts_union);
PG_FUNCTION_INFO_V1(gbt_ts_picksplit);
PG_FUNCTION_INFO_V1(gbt_ts_consistent);
PG_FUNCTION_INFO_V1(gbt_tstz_consistent);
PG_FUNCTION_INFO_V1(gbt_ts_penalty);
PG_FUNCTION_INFO_V1(gbt_ts_same);
Datum gbt_ts_compress(PG_FUNCTION_ARGS);
Datum gbt_tstz_compress(PG_FUNCTION_ARGS);
Datum gbt_ts_union(PG_FUNCTION_ARGS);
Datum gbt_ts_picksplit(PG_FUNCTION_ARGS);
Datum gbt_ts_consistent(PG_FUNCTION_ARGS);
Datum gbt_tstz_consistent(PG_FUNCTION_ARGS);
Datum gbt_ts_penalty(PG_FUNCTION_ARGS);
Datum gbt_ts_same(PG_FUNCTION_ARGS);
static bool gbt_tsgt (const void *a, const void *b)
{
return DatumGetBool(
DirectFunctionCall2(timestamp_gt,PointerGetDatum( a ), PointerGetDatum( b ) )
);
}
static bool gbt_tsge (const void *a, const void *b)
{
return DatumGetBool(
DirectFunctionCall2(timestamp_ge,PointerGetDatum( a ), PointerGetDatum( b ) )
);
}
static bool gbt_tseq (const void *a, const void *b)
{
return DatumGetBool(
DirectFunctionCall2(timestamp_eq,PointerGetDatum( a ), PointerGetDatum( b ) )
);
}
static bool gbt_tsle (const void *a, const void *b)
{
return DatumGetBool(
DirectFunctionCall2(timestamp_le,PointerGetDatum( a ), PointerGetDatum( b ) )
);
}
static bool gbt_tslt (const void *a, const void *b)
{
return DatumGetBool(
DirectFunctionCall2(timestamp_lt,PointerGetDatum( a ), PointerGetDatum( b ) )
);
}
static int
gbt_tskey_cmp(const void *a, const void *b)
{
if ( gbt_tsgt( (void*)&(((Nsrt *) a)->t[0]) , (void*)&(((Nsrt *) b)->t[0]) ) ){
return 1;
} else
if ( gbt_tslt( (void*)&(((Nsrt *) a)->t[0]) , (void*)&(((Nsrt *) b)->t[0]) ) ){
return -1;
}
return 0;
}
static const gbtree_ninfo tinfo =
{
gbt_t_ts,
sizeof(Timestamp),
gbt_tsgt,
gbt_tsge,
gbt_tseq,
gbt_tsle,
gbt_tslt,
gbt_tskey_cmp
};
/**************************************************
* timestamp ops
**************************************************/
static Timestamp * tstz_to_ts_gmt ( Timestamp * gmt, TimestampTz * ts )
{
int val, tz ;
*gmt = *ts;
DecodeSpecial(0, "gmt", &val);
if ( ! TIMESTAMP_NOT_FINITE(*ts))
{
tz = val * 60;
#ifdef HAVE_INT64_TIMESTAMP
*gmt -= (tz * INT64CONST(1000000));
#else
*gmt -= tz;
*gmt = JROUND(*gmt);
#endif
}
return gmt;
}
Datum
gbt_ts_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_tstz_compress(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
GISTENTRY *retval ;
if (entry->leafkey)
{
tsKEY *r = (tsKEY *) palloc(sizeof(tsKEY));
TimestampTz ts = *(TimestampTz *) DatumGetPointer(entry->key);
Timestamp gmt ;
tstz_to_ts_gmt ( &gmt, &ts );
retval = palloc(sizeof(GISTENTRY));
r->lower = r->upper = gmt ;
gistentryinit(*retval, PointerGetDatum(r),
entry->rel, entry->page,
entry->offset, sizeof(tsKEY), FALSE);
}
else
retval = entry;
PG_RETURN_POINTER( retval );
}
Datum
gbt_ts_consistent(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
Timestamp *query = (Timestamp *) PG_GETARG_POINTER(1);
tsKEY *kkk = (tsKEY *) 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_tstz_consistent(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
TimestampTz *query = (Timestamp *) PG_GETARG_POINTER(1);
tsKEY *kkk = (tsKEY *) DatumGetPointer(entry->key);
GBT_NUMKEY_R key ;
StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
Timestamp qqq ;
key.lower = (GBT_NUMKEY*) &kkk->lower ;
key.upper = (GBT_NUMKEY*) &kkk->upper ;
tstz_to_ts_gmt ( &qqq, query );
PG_RETURN_BOOL(
gbt_num_consistent( &key, (void*)&qqq,&strategy,GIST_LEAF(entry),&tinfo)
);
}
Datum
gbt_ts_union(PG_FUNCTION_ARGS)
{
GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
void *out = palloc(sizeof(tsKEY));
*(int *) PG_GETARG_POINTER(1) = sizeof(tsKEY);
PG_RETURN_POINTER( gbt_num_union ( (void*)out, entryvec, &tinfo ) );
}
Datum
gbt_ts_penalty(PG_FUNCTION_ARGS)
{
tsKEY *origentry = (tsKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
tsKEY *newentry = (tsKEY *) 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(
timestamp_mi,
TimestampGetDatum(newentry->upper),
TimestampGetDatum(origentry->upper)
));
/* see interval_larger */
res = Max(intr->time + intr->month * (30 * 86400), 0);
pfree(intr);
intr = DatumGetIntervalP(DirectFunctionCall2(
timestamp_mi,
TimestampGetDatum(origentry->lower),
TimestampGetDatum(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(
timestamp_mi,
TimestampGetDatum(origentry->upper),
TimestampGetDatum(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_ts_picksplit(PG_FUNCTION_ARGS)
{
PG_RETURN_POINTER(gbt_num_picksplit(
(GistEntryVector *) PG_GETARG_POINTER(0),
(GIST_SPLITVEC *) PG_GETARG_POINTER(1),
&tinfo
));
}
Datum
gbt_ts_same(PG_FUNCTION_ARGS)
{
tsKEY *b1 = (tsKEY *) PG_GETARG_POINTER(0);
tsKEY *b2 = (tsKEY *) PG_GETARG_POINTER(1);
bool *result = (bool *) PG_GETARG_POINTER(2);
*result = gbt_num_same ( (void*)b1, (void*)b2, &tinfo );
PG_RETURN_POINTER(result);
}