From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Sun, 16 Sep 2007 15:56:39 +0000 (+0000)
Subject: Fix overflow in extract(epoch from interval) for intervals exceeding 68 years.
X-Git-Tag: REL8_1_11~34
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=ac5091b6ac744cb186c527c50078709fab1d13f9;p=postgresql

Fix overflow in extract(epoch from interval) for intervals exceeding 68 years.
Seems to have been introduced in 8.1 by careless SECS_PER_DAY
search-and-replace.
---

diff --git a/src/backend/utils/adt/timestamp.c b/src/backend/utils/adt/timestamp.c
index 2cf4f5878b..b00caeee93 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 1.157.2.1 2005/11/22 18:23:22 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/adt/timestamp.c,v 1.157.2.2 2007/09/16 15:56:39 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -3979,9 +3979,9 @@ interval_part(PG_FUNCTION_ARGS)
 #else
 		result = interval->time;
 #endif
-		result += (DAYS_PER_YEAR * SECS_PER_DAY) * (interval->month / MONTHS_PER_YEAR);
+		result += ((double) DAYS_PER_YEAR * SECS_PER_DAY) * (interval->month / MONTHS_PER_YEAR);
 		result += ((double) DAYS_PER_MONTH * SECS_PER_DAY) * (interval->month % MONTHS_PER_YEAR);
-		result += interval->day * SECS_PER_DAY;
+		result += ((double) SECS_PER_DAY) * interval->day;
 	}
 	else
 	{