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 1bcd6726aead879ff48cde8206da39e73176f11b..347d82be07aa0e1a2403d355eeffb26bd98ef7df 100644 (file)
--- 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);
 }