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 ea1768be79de8833819b87e76d72b9b590b0f24b..fe7daaadbb5a78df617bc8ca06a1d9064e70d9b2 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 1.84 2003/07/17 00:55:37 tgl Exp $
+ *   $Header: /cvsroot/pgsql/src/backend/utils/adt/date.c,v 1.85 2003/07/24 00:21:26 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -348,17 +348,17 @@ 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) - POSTGRES_EPOCH_JDATE;
 
    PG_RETURN_DATEADT(result);
 }