Merge tnurnberg@bk-internal.mysql.com:/home/bk/mysql-5.0-opt

into  mysql.com:/misc/mysql/31990/50-31990

mysql-test/r/type_date.result

@@ -251,4 +251,9 @@ INSERT INTO t1 VALUES ('1000-00-00');
 ERROR 22007: Incorrect date value: '1000-00-00' for column 'a' at row 1
 SET SQL_MODE=DEFAULT;
 DROP TABLE t1,t2;
+CREATE TABLE t1 SELECT curdate() AS f1;
+SELECT hour(f1), minute(f1), second(f1) FROM t1;
+hour(f1)	minute(f1)	second(f1)
+0	0	0
+DROP TABLE t1;
 End of 5.0 tests

mysql-test/t/type_date.test

@@ -210,4 +210,12 @@ INSERT INTO t1 VALUES ('1000-00-00');
 SET SQL_MODE=DEFAULT;
 DROP TABLE t1,t2;
 
+#
+# Bug #31990: MINUTE() and SECOND() return bogus results when used on a DATE
+#
+
+CREATE TABLE t1 SELECT curdate() AS f1;
+SELECT hour(f1), minute(f1), second(f1) FROM t1;
+DROP TABLE t1;
+
 --echo End of 5.0 tests

sql/field.cc

@@ -5195,6 +5195,13 @@ String *Field_date::val_str(String *val_buffer,
 }
 
 
+bool Field_date::get_time(MYSQL_TIME *ltime)
+{
+  bzero((char *)ltime, sizeof(MYSQL_TIME));
+  return 0;
+}
+
+
 int Field_date::cmp(const char *a_ptr, const char *b_ptr)
 {
   int32 a,b;

sql/field.h

@@ -944,6 +944,7 @@ class Field_date :public Field_str {
   double val_real(void);
   longlong val_int(void);
   String *val_str(String*,String *);
+  bool get_time(MYSQL_TIME *ltime);
   bool send_binary(Protocol *protocol);
   int cmp(const char *,const char*);
   void sort_string(char *buff,uint length);