diff options
Diffstat (limited to 'src/backend/utils/adt/date.c')
| -rw-r--r-- | src/backend/utils/adt/date.c | 34 |
1 files changed, 26 insertions, 8 deletions
diff --git a/src/backend/utils/adt/date.c b/src/backend/utils/adt/date.c index a66680f4772..efc965ae4c3 100644 --- a/src/backend/utils/adt/date.c +++ b/src/backend/utils/adt/date.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/utils/adt/date.c,v 1.133 2007/06/15 20:56:50 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/utils/adt/date.c,v 1.134 2007/07/06 04:15:58 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -1198,6 +1198,17 @@ time_cmp(PG_FUNCTION_ARGS) } Datum +time_hash(PG_FUNCTION_ARGS) +{ + /* We can use either hashint8 or hashfloat8 directly */ +#ifdef HAVE_INT64_TIMESTAMP + return hashint8(fcinfo); +#else + return hashfloat8(fcinfo); +#endif +} + +Datum time_larger(PG_FUNCTION_ARGS) { TimeADT time1 = PG_GETARG_TIMEADT(0); @@ -1960,20 +1971,27 @@ timetz_cmp(PG_FUNCTION_ARGS) PG_RETURN_INT32(timetz_cmp_internal(time1, time2)); } -/* - * timetz, being an unusual size, needs a specialized hash function. - */ Datum timetz_hash(PG_FUNCTION_ARGS) { TimeTzADT *key = PG_GETARG_TIMETZADT_P(0); + uint32 thash; /* - * Specify hash length as sizeof(double) + sizeof(int4), not as - * sizeof(TimeTzADT), so that any garbage pad bytes in the structure won't - * be included in the hash! + * To avoid any problems with padding bytes in the struct, + * we figure the field hashes separately and XOR them. This also + * provides a convenient framework for dealing with the fact that + * the time field might be either double or int64. */ - return hash_any((unsigned char *) key, sizeof(key->time) + sizeof(key->zone)); +#ifdef HAVE_INT64_TIMESTAMP + thash = DatumGetUInt32(DirectFunctionCall1(hashint8, + Int64GetDatumFast(key->time))); +#else + thash = DatumGetUInt32(DirectFunctionCall1(hashfloat8, + Float8GetDatumFast(key->time))); +#endif + thash ^= DatumGetUInt32(hash_uint32(key->zone)); + PG_RETURN_UINT32(thash); } Datum |