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-rw-r--r--src/backend/utils/adt/timestamp.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/src/backend/utils/adt/timestamp.c b/src/backend/utils/adt/timestamp.c
index 632c97ef2fd..8b64711e635 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 1.128 2005/06/30 03:48:58 neilc Exp $
+ * $PostgreSQL: pgsql/src/backend/utils/adt/timestamp.c,v 1.129 2005/07/04 14:38:31 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@@ -2793,9 +2793,12 @@ timestamp_trunc(PG_FUNCTION_ARGS)
/*
* If it is week 52/53 and the month is January,
* then the week must belong to the previous year.
+ * Also, some December dates belong to the next year.
*/
if (woy >= 52 && tm->tm_mon == 1)
--tm->tm_year;
+ if (woy <= 1 && tm->tm_mon == 12)
+ ++tm->tm_year;
isoweek2date(woy, &(tm->tm_year), &(tm->tm_mon), &(tm->tm_mday));
tm->tm_hour = 0;
tm->tm_min = 0;
@@ -2924,9 +2927,12 @@ timestamptz_trunc(PG_FUNCTION_ARGS)
/*
* If it is week 52/53 and the month is January,
* then the week must belong to the previous year.
+ * Also, some December dates belong to the next year.
*/
if (woy >= 52 && tm->tm_mon == 1)
--tm->tm_year;
+ if (woy <= 1 && tm->tm_mon == 12)
+ ++tm->tm_year;
isoweek2date(woy, &(tm->tm_year), &(tm->tm_mon), &(tm->tm_mday));
tm->tm_hour = 0;
tm->tm_min = 0;