diff options
Diffstat (limited to 'src/backend/utils/adt/timestamp.c')
| -rw-r--r-- | src/backend/utils/adt/timestamp.c | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/src/backend/utils/adt/timestamp.c b/src/backend/utils/adt/timestamp.c index b4a518a1da4..43956597e31 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 1.156 2005/10/25 17:13:07 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/utils/adt/timestamp.c,v 1.157 2005/10/27 02:45:22 momjian Exp $ * *------------------------------------------------------------------------- */ @@ -1943,8 +1943,31 @@ timestamp_mi(PG_FUNCTION_ARGS) result->month = 0; result->day = 0; - /* this is wrong, but removing it breaks a lot of regression tests */ - result = DatumGetIntervalP(DirectFunctionCall1(interval_justify_hours, + /* + * This is wrong, but removing it breaks a lot of regression tests. + * For example: + * + * test=> SET timezone = 'EST5EDT'; + * test=> SELECT + * test-> ('2005-10-30 13:22:00-05'::timestamptz - + * test(> '2005-10-29 13:22:00-04'::timestamptz); + * ?column? + * ---------------- + * 1 day 01:00:00 + * (1 row) + * + * so adding that to the first timestamp gets: + * + * test=> SELECT + * test-> ('2005-10-29 13:22:00-04'::timestamptz + + * test(> ('2005-10-30 13:22:00-05'::timestamptz - + * test(> '2005-10-29 13:22:00-04'::timestamptz)) at time zone 'EST'; + * timezone + * -------------------- + * 2005-10-30 14:22:00 + * (1 row) + */ + result = DatumGetIntervalP(DirectFunctionCall1(interval_justify_hours, IntervalPGetDatum(result))); PG_RETURN_INTERVAL_P(result); |