Datum HASHAPI_Hash_1_time(PG_FUNCTION_ARGS)
{
int32 num_segs; /* number of segments */
TimeADT val1; /* time value */
unsigned int targetbucket; /* 0-based */
int16 algorithm; /* hashing algorithm */
Datum d1;
Oid oid;
/* Get number of segments */
num_segs = PG_GETARG_INT32(0);
/* Get hashing algoriithm */
algorithm = PG_GETARG_INT16(1);
/* Get the value to hash */
val1 = PG_GETARG_TIMEADT(2);
d1 = TimeADTGetDatum(val1);
/* create a CdbHash for this hash test. */
h = makeCdbHash(num_segs, algorithm);
/* init cdb hash */
cdbhashinit(h);
oid = TIMEOID;
cdbhash(h, d1, oid);
/* reduce the result hash value */
targetbucket = cdbhashreduce(h);
PG_RETURN_INT32(targetbucket); /* return target bucket (segID) */
}
/*
* Convert a compressed leaf item back to the original type, for index-only
* scans.
*/
GISTENTRY *
gbt_num_fetch(GISTENTRY *entry, const gbtree_ninfo *tinfo)
{
GISTENTRY *retval;
Datum datum;
Assert(tinfo->indexsize >= 2 * tinfo->size);
/*
* Get the original Datum from the stored datum. On leaf entries, the
* lower and upper bound are the same. We just grab the lower bound and
* return it.
*/
switch (tinfo->t)
{
case gbt_t_int2:
datum = Int16GetDatum(*(int16 *) entry->key);
break;
case gbt_t_int4:
datum = Int32GetDatum(*(int32 *) entry->key);
break;
case gbt_t_int8:
datum = Int64GetDatum(*(int64 *) entry->key);
break;
case gbt_t_oid:
case gbt_t_enum:
datum = ObjectIdGetDatum(*(Oid *) entry->key);
break;
case gbt_t_float4:
datum = Float4GetDatum(*(float4 *) entry->key);
break;
case gbt_t_float8:
datum = Float8GetDatum(*(float8 *) entry->key);
break;
case gbt_t_date:
datum = DateADTGetDatum(*(DateADT *) entry->key);
break;
case gbt_t_time:
datum = TimeADTGetDatum(*(TimeADT *) entry->key);
break;
case gbt_t_ts:
datum = TimestampGetDatum(*(Timestamp *) entry->key);
break;
case gbt_t_cash:
datum = CashGetDatum(*(Cash *) entry->key);
break;
default:
datum = PointerGetDatum(entry->key);
}
retval = palloc(sizeof(GISTENTRY));
gistentryinit(*retval, datum, entry->rel, entry->page, entry->offset,
false);
return retval;
}
static Datum
leftmostvalue_time(void)
{
return TimeADTGetDatum(0);
}
