diff --git a/src/backend/utils/adt/date.c b/src/backend/utils/adt/date.c
index ab4b71acd17e18a2745a62026984a358df7089db..3a0f6b7969fc819b41d1c2034013e5ed45c4c7ee 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 1.105 2005/04/23 22:53:05 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/adt/date.c,v 1.106 2005/05/23 18:56:55 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -281,11 +281,11 @@ date_mii(PG_FUNCTION_ARGS)
 #ifdef HAVE_INT64_TIMESTAMP
 /* date is days since 2000, timestamp is microseconds since same... */
 #define date2timestamp(dateVal) \
-	((Timestamp) ((dateVal) * INT64CONST(86400000000)))
+	((Timestamp) ((dateVal) * USECS_PER_DAY))
 #else
 /* date is days since 2000, timestamp is seconds since same... */
 #define date2timestamp(dateVal) \
-	((Timestamp) ((dateVal) * 86400.0))
+	((Timestamp) ((dateVal) * (double)SECS_PER_DAY))
 #endif
 
 static TimestampTz
@@ -305,10 +305,10 @@ date2timestamptz(DateADT dateVal)
 	tz = DetermineLocalTimeZone(tm);
 
 #ifdef HAVE_INT64_TIMESTAMP
-	result = (dateVal * INT64CONST(86400000000))
-		+ (tz * INT64CONST(1000000));
+	result = (dateVal * USECS_PER_DAY)
+		+ (tz * USECS_PER_SEC);
 #else
-	result = dateVal * 86400.0 + tz;
+	result = dateVal * (double)SECS_PER_DAY + tz;
 #endif
 
 	return result;
@@ -922,7 +922,7 @@ tm2time(struct pg_tm * tm, fsec_t fsec, TimeADT *result)
 {
 #ifdef HAVE_INT64_TIMESTAMP
 	*result = ((((((tm->tm_hour * 60) + tm->tm_min) * 60) + tm->tm_sec)
-				* INT64CONST(1000000)) + fsec);
+				* USECS_PER_SEC) + fsec);
 #else
 	*result = ((((tm->tm_hour * 60) + tm->tm_min) * 60) + tm->tm_sec + fsec);
 #endif
@@ -938,12 +938,12 @@ static int
 time2tm(TimeADT time, struct pg_tm * tm, fsec_t *fsec)
 {
 #ifdef HAVE_INT64_TIMESTAMP
-	tm->tm_hour = (time / INT64CONST(3600000000));
-	time -= (tm->tm_hour * INT64CONST(3600000000));
-	tm->tm_min = (time / INT64CONST(60000000));
-	time -= (tm->tm_min * INT64CONST(60000000));
-	tm->tm_sec = (time / INT64CONST(1000000));
-	time -= (tm->tm_sec * INT64CONST(1000000));
+	tm->tm_hour = (time / USECS_PER_HOUR);
+	time -= (tm->tm_hour * USECS_PER_HOUR);
+	tm->tm_min = (time / USECS_PER_MINUTE);
+	time -= (tm->tm_min * USECS_PER_MINUTE);
+	tm->tm_sec = (time / USECS_PER_SEC);
+	time -= (tm->tm_sec * USECS_PER_SEC);
 	*fsec = time;
 #else
 	double		trem;
@@ -1343,7 +1343,7 @@ timestamp_time(PG_FUNCTION_ARGS)
 	 * 86400000000) - timestamp;
 	 */
 	result = ((((((tm->tm_hour * 60) + tm->tm_min) * 60) + tm->tm_sec)
-			   * INT64CONST(1000000)) + fsec);
+			   * USECS_PER_SEC) + fsec);
 #else
 	result = ((((tm->tm_hour * 60) + tm->tm_min) * 60) + tm->tm_sec + fsec);
 #endif
@@ -1380,7 +1380,7 @@ timestamptz_time(PG_FUNCTION_ARGS)
 	 * 86400000000) - timestamp;
 	 */
 	result = ((((((tm->tm_hour * 60) + tm->tm_min) * 60) + tm->tm_sec)
-			   * INT64CONST(1000000)) + fsec);
+			   * USECS_PER_SEC) + fsec);
 #else
 	result = ((((tm->tm_hour * 60) + tm->tm_min) * 60) + tm->tm_sec + fsec);
 #endif
@@ -1440,20 +1440,20 @@ interval_time(PG_FUNCTION_ARGS)
 	int64		days;
 
 	result = span->time;
-	if (result >= INT64CONST(86400000000))
+	if (result >= USECS_PER_DAY)
 	{
-		days = result / INT64CONST(86400000000);
-		result -= days * INT64CONST(86400000000);
+		days = result / USECS_PER_DAY;
+		result -= days * USECS_PER_DAY;
 	}
 	else if (result < 0)
 	{
-		days = (-result + INT64CONST(86400000000) - 1) / INT64CONST(86400000000);
-		result += days * INT64CONST(86400000000);
+		days = (-result + USECS_PER_DAY - 1) / USECS_PER_DAY;
+		result += days * USECS_PER_DAY;
 	}
 #else
 	result = span->time;
-	if (result >= 86400e0 || result < 0)
-		result -= floor(result / 86400e0) * 86400e0;
+	if (result >= (double)SECS_PER_DAY || result < 0)
+		result -= floor(result / (double)SECS_PER_DAY) * (double)SECS_PER_DAY;
 #endif
 
 	PG_RETURN_TIMEADT(result);
@@ -1489,14 +1489,14 @@ time_pl_interval(PG_FUNCTION_ARGS)
 
 #ifdef HAVE_INT64_TIMESTAMP
 	result = (time + span->time);
-	result -= (result / INT64CONST(86400000000) * INT64CONST(86400000000));
+	result -= (result / USECS_PER_DAY * USECS_PER_DAY);
 	if (result < INT64CONST(0))
-		result += INT64CONST(86400000000);
+		result += USECS_PER_DAY;
 #else
 	TimeADT		time1;
 
 	result = (time + span->time);
-	TMODULO(result, time1, 86400e0);
+	TMODULO(result, time1, (double)SECS_PER_DAY);
 	if (result < 0)
 		result += 86400;
 #endif
@@ -1516,14 +1516,14 @@ time_mi_interval(PG_FUNCTION_ARGS)
 
 #ifdef HAVE_INT64_TIMESTAMP
 	result = (time - span->time);
-	result -= (result / INT64CONST(86400000000) * INT64CONST(86400000000));
+	result -= (result / USECS_PER_DAY * USECS_PER_DAY);
 	if (result < INT64CONST(0))
-		result += INT64CONST(86400000000);
+		result += USECS_PER_DAY;
 #else
 	TimeADT		time1;
 
 	result = (time - span->time);
-	TMODULO(result, time1, 86400e0);
+	TMODULO(result, time1, (double)SECS_PER_DAY);
 	if (result < 0)
 		result += 86400;
 #endif
@@ -1624,7 +1624,7 @@ time_part(PG_FUNCTION_ARGS)
 		{
 			case DTK_MICROSEC:
 #ifdef HAVE_INT64_TIMESTAMP
-				result = ((tm->tm_sec * INT64CONST(1000000)) + fsec);
+				result = ((tm->tm_sec * USECS_PER_SEC) + fsec);
 #else
 				result = ((tm->tm_sec + fsec) * 1000000);
 #endif
@@ -1641,7 +1641,7 @@ time_part(PG_FUNCTION_ARGS)
 
 			case DTK_SECOND:
 #ifdef HAVE_INT64_TIMESTAMP
-				result = (tm->tm_sec + (fsec / INT64CONST(1000000)));
+				result = (tm->tm_sec + (fsec / USECS_PER_SEC));
 #else
 				result = (tm->tm_sec + fsec);
 #endif
@@ -1709,7 +1709,7 @@ tm2timetz(struct pg_tm * tm, fsec_t fsec, int tz, TimeTzADT *result)
 {
 #ifdef HAVE_INT64_TIMESTAMP
 	result->time = ((((((tm->tm_hour * 60) + tm->tm_min) * 60) + tm->tm_sec)
-					 * INT64CONST(1000000)) + fsec);
+					 * USECS_PER_SEC) + fsec);
 #else
 	result->time = ((((tm->tm_hour * 60) + tm->tm_min) * 60) + tm->tm_sec + fsec);
 #endif
@@ -1823,12 +1823,12 @@ timetz2tm(TimeTzADT *time, struct pg_tm * tm, fsec_t *fsec, int *tzp)
 #ifdef HAVE_INT64_TIMESTAMP
 	int64		trem = time->time;
 
-	tm->tm_hour = (trem / INT64CONST(3600000000));
-	trem -= (tm->tm_hour * INT64CONST(3600000000));
-	tm->tm_min = (trem / INT64CONST(60000000));
-	trem -= (tm->tm_min * INT64CONST(60000000));
-	tm->tm_sec = (trem / INT64CONST(1000000));
-	*fsec = (trem - (tm->tm_sec * INT64CONST(1000000)));
+	tm->tm_hour = (trem / USECS_PER_HOUR);
+	trem -= (tm->tm_hour * USECS_PER_HOUR);
+	tm->tm_min = (trem / USECS_PER_MINUTE);
+	trem -= (tm->tm_min * USECS_PER_MINUTE);
+	tm->tm_sec = (trem / USECS_PER_SEC);
+	*fsec = (trem - (tm->tm_sec * USECS_PER_SEC));
 #else
 	double		trem = time->time;
 
@@ -1874,8 +1874,8 @@ timetz_cmp_internal(TimeTzADT *time1, TimeTzADT *time2)
 	int64		t1,
 				t2;
 
-	t1 = time1->time + (time1->zone * INT64CONST(1000000));
-	t2 = time2->time + (time2->zone * INT64CONST(1000000));
+	t1 = time1->time + (time1->zone * USECS_PER_SEC);
+	t2 = time2->time + (time2->zone * USECS_PER_SEC);
 #else
 	double		t1,
 				t2;
@@ -2026,12 +2026,12 @@ timetz_pl_interval(PG_FUNCTION_ARGS)
 
 #ifdef HAVE_INT64_TIMESTAMP
 	result->time = (time->time + span->time);
-	result->time -= (result->time / INT64CONST(86400000000) * INT64CONST(86400000000));
+	result->time -= (result->time / USECS_PER_DAY * USECS_PER_DAY);
 	if (result->time < INT64CONST(0))
-		result->time += INT64CONST(86400000000);
+		result->time += USECS_PER_DAY;
 #else
 	result->time = (time->time + span->time);
-	TMODULO(result->time, time1.time, 86400e0);
+	TMODULO(result->time, time1.time, (double)SECS_PER_DAY);
 	if (result->time < 0)
 		result->time += 86400;
 #endif
@@ -2059,12 +2059,12 @@ timetz_mi_interval(PG_FUNCTION_ARGS)
 
 #ifdef HAVE_INT64_TIMESTAMP
 	result->time = (time->time - span->time);
-	result->time -= (result->time / INT64CONST(86400000000) * INT64CONST(86400000000));
+	result->time -= (result->time / USECS_PER_DAY * USECS_PER_DAY);
 	if (result->time < INT64CONST(0))
-		result->time += INT64CONST(86400000000);
+		result->time += USECS_PER_DAY;
 #else
 	result->time = (time->time - span->time);
-	TMODULO(result->time, time1.time, 86400e0);
+	TMODULO(result->time, time1.time, (double)SECS_PER_DAY);
 	if (result->time < 0)
 		result->time += 86400;
 #endif
@@ -2281,10 +2281,10 @@ datetimetz_timestamptz(PG_FUNCTION_ARGS)
 	TimestampTz result;
 
 #ifdef HAVE_INT64_TIMESTAMP
-	result = (((date *INT64CONST(86400000000)) +time->time)
-			  + (time->zone * INT64CONST(1000000)));
+	result = (((date *USECS_PER_DAY) +time->time)
+			  + (time->zone * USECS_PER_SEC));
 #else
-	result = (((date *86400.0) +time->time) + time->zone);
+	result = (((date *(double)SECS_PER_DAY) +time->time) + time->zone);
 #endif
 
 	PG_RETURN_TIMESTAMP(result);
@@ -2400,7 +2400,7 @@ timetz_part(PG_FUNCTION_ARGS)
 
 			case DTK_MICROSEC:
 #ifdef HAVE_INT64_TIMESTAMP
-				result = ((tm->tm_sec * INT64CONST(1000000)) + fsec);
+				result = ((tm->tm_sec * USECS_PER_SEC) + fsec);
 #else
 				result = ((tm->tm_sec + fsec) * 1000000);
 #endif
@@ -2417,7 +2417,7 @@ timetz_part(PG_FUNCTION_ARGS)
 
 			case DTK_SECOND:
 #ifdef HAVE_INT64_TIMESTAMP
-				result = (tm->tm_sec + (fsec / INT64CONST(1000000)));
+				result = (tm->tm_sec + (fsec / USECS_PER_SEC));
 #else
 				result = (tm->tm_sec + fsec);
 #endif
@@ -2496,11 +2496,11 @@ timetz_zone(PG_FUNCTION_ARGS)
 	{
 		tz = val * 60;
 #ifdef HAVE_INT64_TIMESTAMP
-		result->time = time->time + ((time->zone - tz) * INT64CONST(1000000));
+		result->time = time->time + ((time->zone - tz) * USECS_PER_SEC);
 		while (result->time < INT64CONST(0))
-			result->time += INT64CONST(86400000000);
-		while (result->time >= INT64CONST(86400000000))
-			result->time -= INT64CONST(86400000000);
+			result->time += USECS_PER_DAY;
+		while (result->time >= USECS_PER_DAY)
+			result->time -= USECS_PER_DAY;
 #else
 		result->time = time->time + (time->zone - tz);
 		while (result->time < 0)
@@ -2542,7 +2542,7 @@ timetz_izone(PG_FUNCTION_ARGS)
 											  PointerGetDatum(zone))))));
 
 #ifdef HAVE_INT64_TIMESTAMP
-	tz = -(zone->time / INT64CONST(1000000));
+	tz = -(zone->time / USECS_PER_SEC);
 #else
 	tz = -(zone->time);
 #endif
@@ -2550,11 +2550,11 @@ timetz_izone(PG_FUNCTION_ARGS)
 	result = (TimeTzADT *) palloc(sizeof(TimeTzADT));
 
 #ifdef HAVE_INT64_TIMESTAMP
-	result->time = time->time + ((time->zone - tz) * INT64CONST(1000000));
+	result->time = time->time + ((time->zone - tz) * USECS_PER_SEC);
 	while (result->time < INT64CONST(0))
-		result->time += INT64CONST(86400000000);
-	while (result->time >= INT64CONST(86400000000))
-		result->time -= INT64CONST(86400000000);
+		result->time += USECS_PER_DAY;
+	while (result->time >= USECS_PER_DAY)
+		result->time -= USECS_PER_DAY;
 #else
 	result->time = time->time + (time->zone - tz);
 	while (result->time < 0)
diff --git a/src/backend/utils/adt/datetime.c b/src/backend/utils/adt/datetime.c
index 515ee40c2544be859afadc4bd25e7547359bebff..a1e570f1c85ef0082f028f78722560c7c2b5c7bc 100644
--- a/src/backend/utils/adt/datetime.c
+++ b/src/backend/utils/adt/datetime.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/adt/datetime.c,v 1.141 2005/05/23 17:13:14 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/adt/datetime.c,v 1.142 2005/05/23 18:56:55 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -1210,7 +1210,7 @@ DecodeDateTime(char **field, int *ftype, int nf,
 
 								tmask |= DTK_TIME_M;
 #ifdef HAVE_INT64_TIMESTAMP
-								dt2time(time * INT64CONST(86400000000),
+								dt2time(time * USECS_PER_DAY,
 										&tm->tm_hour, &tm->tm_min,
 										&tm->tm_sec, fsec);
 #else
@@ -1969,7 +1969,7 @@ DecodeTimeOnly(char **field, int *ftype, int nf,
 
 								tmask |= DTK_TIME_M;
 #ifdef HAVE_INT64_TIMESTAMP
-								dt2time(time * INT64CONST(86400000000),
+								dt2time(time * USECS_PER_DAY,
 										&tm->tm_hour, &tm->tm_min, &tm->tm_sec, fsec);
 #else
 								dt2time(time * 86400,
@@ -2193,7 +2193,7 @@ DecodeTimeOnly(char **field, int *ftype, int nf,
 #ifdef HAVE_INT64_TIMESTAMP
 	if (tm->tm_hour < 0 || tm->tm_hour > 23 || tm->tm_min < 0 ||
 		tm->tm_min > 59 || tm->tm_sec < 0 || tm->tm_sec > 60 ||
-		*fsec < INT64CONST(0) || *fsec >= INT64CONST(1000000))
+		*fsec < INT64CONST(0) || *fsec >= USECS_PER_SEC)
 		return DTERR_FIELD_OVERFLOW;
 #else
 	if (tm->tm_hour < 0 || tm->tm_hour > 23 || tm->tm_min < 0 ||
@@ -2447,7 +2447,7 @@ DecodeTime(char *str, int fmask, int *tmask, struct pg_tm * tm, fsec_t *fsec)
 #ifdef HAVE_INT64_TIMESTAMP
 	if (tm->tm_hour < 0 || tm->tm_min < 0 || tm->tm_min > 59 ||
 		tm->tm_sec < 0 || tm->tm_sec > 60 || *fsec < INT64CONST(0) ||
-		*fsec >= INT64CONST(1000000))
+		*fsec >= USECS_PER_SEC)
 		return DTERR_FIELD_OVERFLOW;
 #else
 	if (tm->tm_hour < 0 || tm->tm_min < 0 || tm->tm_min > 59 ||
@@ -3222,8 +3222,8 @@ DecodeInterval(char **field, int *ftype, int nf, int *dtype, struct pg_tm * tm,
 		int			sec;
 
 #ifdef HAVE_INT64_TIMESTAMP
-		sec = (*fsec / INT64CONST(1000000));
-		*fsec -= (sec * INT64CONST(1000000));
+		sec = (*fsec / USECS_PER_SEC);
+		*fsec -= (sec * USECS_PER_SEC);
 #else
 		TMODULO(*fsec, sec, 1e0);
 #endif
diff --git a/src/backend/utils/adt/nabstime.c b/src/backend/utils/adt/nabstime.c
index 631c700c5ac481cab9de7033a5fca0ab64090bdc..9a164a3e1ea1178d2ffd8d8c52ca86ed1ca7c903 100644
--- a/src/backend/utils/adt/nabstime.c
+++ b/src/backend/utils/adt/nabstime.c
@@ -10,7 +10,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/adt/nabstime.c,v 1.128 2005/04/19 03:13:59 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/adt/nabstime.c,v 1.129 2005/05/23 18:56:55 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -130,7 +130,7 @@ AbsoluteTimeUsecToTimestampTz(AbsoluteTime sec, int usec)
 
 #ifdef HAVE_INT64_TIMESTAMP
 	result = ((sec - ((POSTGRES_EPOCH_JDATE - UNIX_EPOCH_JDATE) * 86400))
-			  * INT64CONST(1000000)) + usec;
+			  * USECS_PER_SEC) + usec;
 #else
 	result = sec - ((POSTGRES_EPOCH_JDATE - UNIX_EPOCH_JDATE) * 86400)
 		+ (usec / 1000000.0);
@@ -948,7 +948,7 @@ interval_reltime(PG_FUNCTION_ARGS)
 #ifdef HAVE_INT64_TIMESTAMP
 	span = ((((INT64CONST(365250000) * year) + (INT64CONST(30000000) * month))
 			 * INT64CONST(86400)) + interval->time);
-	span /= INT64CONST(1000000);
+	span /= USECS_PER_SEC;
 #else
 	span = (((((double) 365.25 * year) + ((double) 30 * month)) * 86400) + interval->time);
 #endif
@@ -989,7 +989,7 @@ reltime_interval(PG_FUNCTION_ARGS)
 			month = (reltime / (30 * 86400));
 			reltime -= (month * (30 * 86400));
 
-			result->time = (reltime * INT64CONST(1000000));
+			result->time = (reltime * USECS_PER_SEC);
 #else
 			TMODULO(reltime, year, (36525 * 864));
 			TMODULO(reltime, month, (30 * 86400));
diff --git a/src/backend/utils/adt/timestamp.c b/src/backend/utils/adt/timestamp.c
index 777795ae64a2244e1cdd39deb8979b818669fb44..b5c782e78c3caff907a638f2501b534c28203a02 100644
--- a/src/backend/utils/adt/timestamp.c
+++ b/src/backend/utils/adt/timestamp.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/adt/timestamp.c,v 1.120 2005/05/23 17:13:14 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/adt/timestamp.c,v 1.121 2005/05/23 18:56:55 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -695,8 +695,8 @@ AdjustIntervalForTypmod(Interval *interval, int32 typmod)
 			interval->month = 0;
 
 #ifdef HAVE_INT64_TIMESTAMP
-			interval->time = ((int) (interval->time / INT64CONST(86400000000))) *
-								INT64CONST(86400000000);
+			interval->time = ((int) (interval->time / USECS_PER_DAY)) *
+								USECS_PER_DAY;
 
 #else
 			interval->time = ((int) (interval->time / 86400)) * 86400;
@@ -714,13 +714,13 @@ AdjustIntervalForTypmod(Interval *interval, int32 typmod)
 			interval->month = 0;
 
 #ifdef HAVE_INT64_TIMESTAMP
-			day = interval->time / INT64CONST(86400000000);
-			interval->time -= day * INT64CONST(86400000000);
-			interval->time = (interval->time / INT64CONST(3600000000)) *
-								INT64CONST(3600000000);
+			day = interval->time / USECS_PER_DAY;
+			interval->time -= day * USECS_PER_DAY;
+			interval->time = (interval->time / USECS_PER_HOUR) *
+								USECS_PER_HOUR;
 
 #else
-			TMODULO(interval->time, day, 86400.0);
+			TMODULO(interval->time, day, (double)SECS_PER_DAY);
 			interval->time = ((int) (interval->time / 3600)) * 3600.0;
 #endif
 		}
@@ -736,10 +736,10 @@ AdjustIntervalForTypmod(Interval *interval, int32 typmod)
 			interval->month = 0;
 
 #ifdef HAVE_INT64_TIMESTAMP
-			hour = interval->time / INT64CONST(3600000000);
-			interval->time -= hour * INT64CONST(3600000000);
-			interval->time = (interval->time / INT64CONST(60000000)) *
-								INT64CONST(60000000);
+			hour = interval->time / USECS_PER_HOUR;
+			interval->time -= hour * USECS_PER_HOUR;
+			interval->time = (interval->time / USECS_PER_MINUTE) *
+								USECS_PER_MINUTE;
 
 #else
 			TMODULO(interval->time, hour, 3600.0);
@@ -758,8 +758,8 @@ AdjustIntervalForTypmod(Interval *interval, int32 typmod)
 			interval->month = 0;
 
 #ifdef HAVE_INT64_TIMESTAMP
-			minute = interval->time / INT64CONST(60000000);
-			interval->time -= minute * INT64CONST(60000000);
+			minute = interval->time / USECS_PER_MINUTE;
+			interval->time -= minute * USECS_PER_MINUTE;
 
 #else
 			TMODULO(interval->time, minute, 60.0);
@@ -773,8 +773,8 @@ AdjustIntervalForTypmod(Interval *interval, int32 typmod)
 			interval->month = 0;
 
 #ifdef HAVE_INT64_TIMESTAMP
-			interval->time = (interval->time / INT64CONST(3600000000)) *
-								INT64CONST(3600000000);
+			interval->time = (interval->time / USECS_PER_HOUR) *
+								USECS_PER_HOUR;
 
 #else
 			interval->time = ((int) (interval->time / 3600)) * 3600;
@@ -788,8 +788,8 @@ AdjustIntervalForTypmod(Interval *interval, int32 typmod)
 			interval->month = 0;
 
 #ifdef HAVE_INT64_TIMESTAMP
-			interval->time = (interval->time / INT64CONST(60000000)) *
-								INT64CONST(60000000);
+			interval->time = (interval->time / USECS_PER_MINUTE) *
+								USECS_PER_MINUTE;
 
 #else
 			interval->time = ((int) (interval->time / 60)) * 60;
@@ -816,13 +816,13 @@ AdjustIntervalForTypmod(Interval *interval, int32 typmod)
 			interval->month = 0;
 
 #ifdef HAVE_INT64_TIMESTAMP
-			day = (interval->time / INT64CONST(86400000000));
-			interval->time -= day * INT64CONST(86400000000);
-			interval->time = (interval->time / INT64CONST(60000000)) *
-								INT64CONST(60000000);
+			day = (interval->time / USECS_PER_DAY);
+			interval->time -= day * USECS_PER_DAY;
+			interval->time = (interval->time / USECS_PER_MINUTE) *
+								USECS_PER_MINUTE;
 
 #else
-			TMODULO(interval->time, day, 86400.0);
+			TMODULO(interval->time, day, (double)SECS_PER_DAY);
 			interval->time = ((int) (interval->time / 60)) * 60;
 #endif
 		}
@@ -841,11 +841,11 @@ AdjustIntervalForTypmod(Interval *interval, int32 typmod)
 			interval->month = 0;
 
 #ifdef HAVE_INT64_TIMESTAMP
-			day = interval->time / INT64CONST(86400000000);
-			interval->time -= day * INT64CONST(86400000000);
+			day = interval->time / USECS_PER_DAY;
+			interval->time -= day * USECS_PER_DAY;
 
 #else
-			TMODULO(interval->time, day, 86400.0);
+			TMODULO(interval->time, day, (double)SECS_PER_DAY);
 #endif
 		}
 		/* MINUTE TO SECOND */
@@ -862,8 +862,8 @@ AdjustIntervalForTypmod(Interval *interval, int32 typmod)
 			interval->month = 0;
 
 #ifdef HAVE_INT64_TIMESTAMP
-			hour = interval->time / INT64CONST(3600000000);
-			interval->time -= hour * INT64CONST(3600000000);
+			hour = interval->time / USECS_PER_HOUR;
+			interval->time -= hour * USECS_PER_HOUR;
 #else
 			TMODULO(interval->time, hour, 3600.0);
 #endif
@@ -958,12 +958,12 @@ dt2time(Timestamp jd, int *hour, int *min, int *sec, fsec_t *fsec)
 	time = jd;
 
 #ifdef HAVE_INT64_TIMESTAMP
-	*hour = time / INT64CONST(3600000000);
-	time -= (*hour) * INT64CONST(3600000000);
-	*min = time / INT64CONST(60000000);
-	time -= (*min) * INT64CONST(60000000);
-	*sec = time / INT64CONST(1000000);
-	*fsec = time - (*sec * INT64CONST(1000000));
+	*hour = time / USECS_PER_HOUR;
+	time -= (*hour) * USECS_PER_HOUR;
+	*min = time / USECS_PER_MINUTE;
+	time -= (*min) * USECS_PER_MINUTE;
+	*sec = time / USECS_PER_SEC;
+	*fsec = time - (*sec * USECS_PER_SEC);
 #else
 	*hour = time / 3600;
 	time -= (*hour) * 3600;
@@ -1001,7 +1001,7 @@ timestamp2tm(Timestamp dt, int *tzp, struct pg_tm * tm, fsec_t *fsec, char **tzn
 	if (HasCTZSet && (tzp != NULL))
 	{
 #ifdef HAVE_INT64_TIMESTAMP
-		dt -= CTimeZone * INT64CONST(1000000);
+		dt -= CTimeZone * USECS_PER_SEC;
 #else
 		dt -= CTimeZone;
 #endif
@@ -1009,15 +1009,15 @@ timestamp2tm(Timestamp dt, int *tzp, struct pg_tm * tm, fsec_t *fsec, char **tzn
 
 	time = dt;
 #ifdef HAVE_INT64_TIMESTAMP
-	TMODULO(time, date, INT64CONST(86400000000));
+	TMODULO(time, date, USECS_PER_DAY);
 
 	if (time < INT64CONST(0))
 	{
-		time += INT64CONST(86400000000);
+		time += USECS_PER_DAY;
 		date -= 1;
 	}
 #else
-	TMODULO(time, date, 86400e0);
+	TMODULO(time, date, (double)SECS_PER_DAY);
 
 	if (time < 0)
 	{
@@ -1073,7 +1073,7 @@ timestamp2tm(Timestamp dt, int *tzp, struct pg_tm * tm, fsec_t *fsec, char **tzn
 	 * pg_time_t, so it should behave sanely on machines without int64.
 	 */
 #ifdef HAVE_INT64_TIMESTAMP
-	dt = (dt - *fsec) / INT64CONST(1000000) +
+	dt = (dt - *fsec) / USECS_PER_SEC +
 		(POSTGRES_EPOCH_JDATE - UNIX_EPOCH_JDATE) * 86400;
 #else
 	dt = rint(dt - *fsec +
@@ -1142,9 +1142,9 @@ tm2timestamp(struct pg_tm * tm, fsec_t fsec, int *tzp, Timestamp *result)
 
 	time = time2t(tm->tm_hour, tm->tm_min, tm->tm_sec, fsec);
 #ifdef HAVE_INT64_TIMESTAMP
-	*result = date * INT64CONST(86400000000) + time;
+	*result = date * USECS_PER_DAY + time;
 	/* check for major overflow */
-	if ((*result - time) / INT64CONST(86400000000) != date)
+	if ((*result - time) / USECS_PER_DAY != date)
 		return -1;
 	/* check for just-barely overflow (okay except time-of-day wraps) */
 	if ((*result < 0 && date >= 0) ||
@@ -1188,16 +1188,16 @@ interval2tm(Interval span, struct pg_tm * tm, fsec_t *fsec)
 	time = span.time;
 
 #ifdef HAVE_INT64_TIMESTAMP
-	tm->tm_mday = (time / INT64CONST(86400000000));
-	time -= (tm->tm_mday * INT64CONST(86400000000));
-	tm->tm_hour = (time / INT64CONST(3600000000));
-	time -= (tm->tm_hour * INT64CONST(3600000000));
-	tm->tm_min = (time / INT64CONST(60000000));
-	time -= (tm->tm_min * INT64CONST(60000000));
-	tm->tm_sec = (time / INT64CONST(1000000));
-	*fsec = (time - (tm->tm_sec * INT64CONST(1000000)));
+	tm->tm_mday = (time / USECS_PER_DAY);
+	time -= (tm->tm_mday * USECS_PER_DAY);
+	tm->tm_hour = (time / USECS_PER_HOUR);
+	time -= (tm->tm_hour * USECS_PER_HOUR);
+	tm->tm_min = (time / USECS_PER_MINUTE);
+	time -= (tm->tm_min * USECS_PER_MINUTE);
+	tm->tm_sec = (time / USECS_PER_SEC);
+	*fsec = (time - (tm->tm_sec * USECS_PER_SEC));
 #else
-	TMODULO(time, tm->tm_mday, 86400e0);
+	TMODULO(time, tm->tm_mday, (double)SECS_PER_DAY);
 	TMODULO(time, tm->tm_hour, 3600e0);
 	TMODULO(time, tm->tm_min, 60e0);
 	TMODULO(time, tm->tm_sec, 1e0);
@@ -1215,7 +1215,7 @@ tm2interval(struct pg_tm * tm, fsec_t fsec, Interval *span)
 	span->time = ((((((((tm->tm_mday * INT64CONST(24))
 						+ tm->tm_hour) * INT64CONST(60))
 					  + tm->tm_min) * INT64CONST(60))
-					+ tm->tm_sec) * INT64CONST(1000000)) + fsec);
+					+ tm->tm_sec) * USECS_PER_SEC) + fsec);
 #else
 	span->time = ((((((tm->tm_mday * 24.0)
 					  + tm->tm_hour) * 60.0)
@@ -1231,7 +1231,7 @@ tm2interval(struct pg_tm * tm, fsec_t fsec, Interval *span)
 static int64
 time2t(const int hour, const int min, const int sec, const fsec_t fsec)
 {
-	return ((((((hour * 60) + min) * 60) + sec) * INT64CONST(1000000)) + fsec);
+	return ((((((hour * 60) + min) * 60) + sec) * USECS_PER_SEC) + fsec);
 }	/* time2t() */
 
 #else
@@ -1246,7 +1246,7 @@ static Timestamp
 dt2local(Timestamp dt, int tz)
 {
 #ifdef HAVE_INT64_TIMESTAMP
-	dt -= (tz * INT64CONST(1000000));
+	dt -= (tz * USECS_PER_SEC);
 #else
 	dt -= tz;
 	dt = JROUND(dt);
@@ -1616,9 +1616,9 @@ interval_cmp_internal(Interval *interval1, Interval *interval2)
 
 #ifdef HAVE_INT64_TIMESTAMP
 	if (interval1->month != 0)
-		span1 += interval1->month * INT64CONST(30) * INT64CONST(86400000000);
+		span1 += interval1->month * INT64CONST(30) * USECS_PER_DAY;
 	if (interval2->month != 0)
-		span2 += interval2->month * INT64CONST(30) * INT64CONST(86400000000);
+		span2 += interval2->month * INT64CONST(30) * USECS_PER_DAY;
 #else
 	if (interval1->month != 0)
 		span1 += interval1->month * (30.0 * 86400);
@@ -2161,7 +2161,7 @@ interval_mul(PG_FUNCTION_ARGS)
 	result->month = months;
 	result->time = (span1->time * factor);
 	result->time += (months - result->month) * INT64CONST(30) *
-					INT64CONST(86400000000);
+					USECS_PER_DAY;
 #else
 	result->month = rint(months);
 	result->time = JROUND(span1->time * factor);
@@ -2205,7 +2205,7 @@ interval_div(PG_FUNCTION_ARGS)
 	result->time = (span->time / factor);
 	/* evaluate fractional months as 30 days */
 	result->time += ((span->month - (result->month * factor)) *
-					INT64CONST(30) * INT64CONST(86400000000)) / factor;
+					INT64CONST(30) * USECS_PER_DAY) / factor;
 #else
 	months = span->month / factor;
 	result->month = rint(months);
@@ -3375,10 +3375,10 @@ timestamp_part(PG_FUNCTION_ARGS)
 				result = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday);
 #ifdef HAVE_INT64_TIMESTAMP
 				result += ((((tm->tm_hour * 60) + tm->tm_min) * 60) +
-							tm->tm_sec + (fsec / 1000000e0)) / 86400e0;
+							tm->tm_sec + (fsec / 1000000e0)) / (double)SECS_PER_DAY;
 #else
 				result += ((((tm->tm_hour * 60) + tm->tm_min) * 60) +
-							tm->tm_sec + fsec) / 86400e0;
+							tm->tm_sec + fsec) / (double)SECS_PER_DAY;
 #endif
 				break;
 
@@ -3603,10 +3603,10 @@ timestamptz_part(PG_FUNCTION_ARGS)
 				result = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday);
 #ifdef HAVE_INT64_TIMESTAMP
 				result += ((((tm->tm_hour * 60) + tm->tm_min) * 60) +
-							tm->tm_sec + (fsec / 1000000e0)) / 86400e0;
+							tm->tm_sec + (fsec / 1000000e0)) / (double)SECS_PER_DAY;
 #else
 				result += ((((tm->tm_hour * 60) + tm->tm_min) * 60) +
-							tm->tm_sec + fsec) / 86400e0;
+							tm->tm_sec + fsec) / (double)SECS_PER_DAY;
 #endif
 				break;
 
@@ -3872,7 +3872,7 @@ timestamp_izone(PG_FUNCTION_ARGS)
 											  PointerGetDatum(zone))))));
 
 #ifdef HAVE_INT64_TIMESTAMP
-	tz = zone->time / INT64CONST(1000000);
+	tz = zone->time / USECS_PER_SEC;
 #else
 	tz = zone->time;
 #endif
@@ -4021,7 +4021,7 @@ timestamptz_izone(PG_FUNCTION_ARGS)
 											  PointerGetDatum(zone))))));
 
 #ifdef HAVE_INT64_TIMESTAMP
-	tz = -(zone->time / INT64CONST(1000000));
+	tz = -(zone->time / USECS_PER_SEC);
 #else
 	tz = -(zone->time);
 #endif
diff --git a/src/include/utils/timestamp.h b/src/include/utils/timestamp.h
index e8812dd7564cc17d227a240b782c8a323d64937d..57d1e64f789227e523122a1a191f9d280ea5f594 100644
--- a/src/include/utils/timestamp.h
+++ b/src/include/utils/timestamp.h
@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/utils/timestamp.h,v 1.40 2004/12/31 22:03:46 pgsql Exp $
+ * $PostgreSQL: pgsql/src/include/utils/timestamp.h,v 1.41 2005/05/23 18:56:55 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -59,6 +59,11 @@ typedef struct
 #define MAX_TIMESTAMP_PRECISION 6
 #define MAX_INTERVAL_PRECISION 6
 
+#define SECS_PER_DAY	86400
+#define USECS_PER_DAY	INT64CONST(86400000000)
+#define USECS_PER_HOUR	INT64CONST(3600000000)
+#define USECS_PER_MINUTE INT64CONST(60000000)
+#define USECS_PER_SEC	INT64CONST(1000000)
 
 /*
  * Macros for fmgr-callable functions.
diff --git a/src/interfaces/ecpg/pgtypeslib/dt_common.c b/src/interfaces/ecpg/pgtypeslib/dt_common.c
index dfd7c663fe3fe0145c79e112c645bb1818ca950b..91a8d611b390b4e7aaa246de4a7655194e6f3aa0 100644
--- a/src/interfaces/ecpg/pgtypeslib/dt_common.c
+++ b/src/interfaces/ecpg/pgtypeslib/dt_common.c
@@ -2255,7 +2255,7 @@ DecodeDateTime(char **field, int *ftype, int nf,
 
 								tmask |= DTK_TIME_M;
 #ifdef HAVE_INT64_TIMESTAMP
-								dt2time((time * INT64CONST(86400000000)), &tm->tm_hour, &tm->tm_min, &tm->tm_sec, fsec);
+								dt2time((time * USECS_PER_DAY), &tm->tm_hour, &tm->tm_min, &tm->tm_sec, fsec);
 #else
 								dt2time((time * 86400), &tm->tm_hour, &tm->tm_min, &tm->tm_sec, fsec);
 #endif
diff --git a/src/interfaces/ecpg/pgtypeslib/interval.c b/src/interfaces/ecpg/pgtypeslib/interval.c
index 7a06069634c5e9f61afc149ad2a85c82fe3d03a6..eb18e6ce9127bfd9d0c258d44d6f0a3b0141398c 100644
--- a/src/interfaces/ecpg/pgtypeslib/interval.c
+++ b/src/interfaces/ecpg/pgtypeslib/interval.c
@@ -700,8 +700,8 @@ interval2tm(interval span, struct tm * tm, fsec_t *fsec)
 	time = span.time;
 
 #ifdef HAVE_INT64_TIMESTAMP
-	tm->tm_mday = (time / INT64CONST(86400000000));
-	time -= (tm->tm_mday * INT64CONST(86400000000));
+	tm->tm_mday = (time / USECS_PER_DAY);
+	time -= (tm->tm_mday * USECS_PER_DAY);
 	tm->tm_hour = (time / INT64CONST(3600000000));
 	time -= (tm->tm_hour * INT64CONST(3600000000));
 	tm->tm_min = (time / INT64CONST(60000000));
diff --git a/src/interfaces/ecpg/pgtypeslib/timestamp.c b/src/interfaces/ecpg/pgtypeslib/timestamp.c
index e6062525ab430b6103e74774a194a81b8187ca85..971a4175174b88b0bcb3b76e4e8e821b7169370c 100644
--- a/src/interfaces/ecpg/pgtypeslib/timestamp.c
+++ b/src/interfaces/ecpg/pgtypeslib/timestamp.c
@@ -69,9 +69,9 @@ tm2timestamp(struct tm * tm, fsec_t fsec, int *tzp, timestamp *result)
 	dDate = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday) - date2j(2000, 1, 1);
 	time = time2t(tm->tm_hour, tm->tm_min, tm->tm_sec, fsec);
 #ifdef HAVE_INT64_TIMESTAMP
-	*result = (dDate * INT64CONST(86400000000)) + time;
+	*result = (dDate * USECS_PER_DAY) + time;
 	/* check for major overflow */
-	if ((*result - time) / INT64CONST(86400000000) != dDate)
+	if ((*result - time) / USECS_PER_DAY != dDate)
 		return -1;
 	/* check for just-barely overflow (okay except time-of-day wraps) */
 	if ((*result < 0) ? (dDate >= 0) : (dDate < 0))
@@ -163,11 +163,11 @@ timestamp2tm(timestamp dt, int *tzp, struct tm * tm, fsec_t *fsec, char **tzn)
 
 	time = dt;
 #ifdef HAVE_INT64_TIMESTAMP
-	TMODULO(time, dDate, INT64CONST(86400000000));
+	TMODULO(time, dDate, USECS_PER_DAY);
 
 	if (time < INT64CONST(0))
 	{
-		time += INT64CONST(86400000000);
+		time += USECS_PER_DAY;
 		dDate -= 1;
 	}
 #else