From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Thu, 24 Jul 2003 00:21:31 +0000 (+0000)
Subject: Repair 7.3 breakage in timestamp-to-date conversion for dates before 2000.
X-Git-Tag: REL7_3_4~3
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=fa67e2ce4f80ad7ac063da041d1cb4ca9ff4c06d;p=postgresql

Repair 7.3 breakage in timestamp-to-date conversion for dates before 2000.
---

diff --git a/src/backend/utils/adt/date.c b/src/backend/utils/adt/date.c
index 1bcd6726ae..347d82be07 100644
--- a/src/backend/utils/adt/date.c
+++ b/src/backend/utils/adt/date.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/adt/date.c,v 1.73.2.5 2003/06/16 18:56:53 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/adt/date.c,v 1.73.2.6 2003/07/24 00:21:31 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -319,17 +319,17 @@ timestamp_date(PG_FUNCTION_ARGS)
 {
 	Timestamp	timestamp = PG_GETARG_TIMESTAMP(0);
 	DateADT		result;
+	struct tm	tt,
+			   *tm = &tt;
+	double		fsec;
 
 	if (TIMESTAMP_NOT_FINITE(timestamp))
 		PG_RETURN_NULL();
 
-#ifdef HAVE_INT64_TIMESTAMP
-	/* Microseconds to days */
-	result = (timestamp / INT64CONST(86400000000));
-#else
-	/* Seconds to days */
-	result = (timestamp / 86400.0);
-#endif
+	if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL) != 0)
+		elog(ERROR, "Unable to convert timestamp to date");
+
+	result = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday) - date2j(2000, 1, 1);
 
 	PG_RETURN_DATEADT(result);
 }