diff options
Diffstat (limited to 'src/include/utils/timestamp.h')
| -rw-r--r-- | src/include/utils/timestamp.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/include/utils/timestamp.h b/src/include/utils/timestamp.h index ae2ef56e0ea..35221d5f1df 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 1.49 2005/07/21 04:48:42 momjian Exp $ + * $PostgreSQL: pgsql/src/include/utils/timestamp.h,v 1.50 2005/07/21 15:16:27 momjian Exp $ * *------------------------------------------------------------------------- */ @@ -63,6 +63,12 @@ typedef struct /* in both timestamp.h and ecpg/dt.h */ #define DAYS_PER_YEAR 365.25 /* assumes leap year every four years */ #define MONTHS_PER_YEAR 12 +/* + * DAYS_PER_MONTH is very imprecise. The more accurate value is + * 365.25/12 = 30.4375, or '30 days 10:30:00'. Right now we only + * return an integral number of days, but someday perhaps we should + * also return a 'time' value to be used as well. + */ #define DAYS_PER_MONTH 30 /* assumes exactly 30 days per month */ #define HOURS_PER_DAY 24 /* assume no daylight savings time changes */ |