lp:738067 Crash in get_datetime_value() in 5.1-micro

mysql-test/r/func_time.result

@@ -1536,3 +1536,6 @@ drop table t1;
 select day(coalesce(null));
 day(coalesce(null))
 NULL
+select timestamp(greatest('2002-08-20', '0000-00-00 00:00:00'));
+timestamp(greatest('2002-08-20', '0000-00-00 00:00:00'))
+2002-08-20 00:00:00

mysql-test/t/func_time.test

@@ -973,3 +973,7 @@ drop table t1;
 #
 select day(coalesce(null));
 
+#
+# lp:738067 Crash in get_datetime_value() in 5.1-micro
+#
+select timestamp(greatest('2002-08-20', '0000-00-00 00:00:00'));

sql/item_func.cc

@@ -2274,6 +2274,8 @@ bool Item_func_min_max::get_date(MYSQL_TIME *ltime, uint fuzzy_date)
 {
   longlong UNINIT_VAR(min_max);
   DBUG_ASSERT(fixed == 1);
+  if (!compare_as_dates)
+    return Item_func::get_date(ltime, fuzzy_date);
 
   for (uint i=0; i < arg_count ; i++)
   {