Merge tnurnberg@bk-internal.mysql.com:/home/bk/mysql-5.1-opt

into  mysql.com:/misc/mysql/31990/51-31990

mysql-test/r/type_date.result

@@ -260,6 +260,11 @@ 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
 create table t1 (a date, primary key (a))engine=memory;
 insert into t1 values ('0000-01-01'), ('0000-00-01'), ('0001-01-01');

mysql-test/t/type_date.test

@@ -213,6 +213,14 @@ 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

@@ -5636,6 +5636,13 @@ 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 uchar *a_ptr, const uchar *b_ptr)
 {
   int32 a,b;

sql/field.h

@@ -1240,6 +1240,7 @@ public:
   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 uchar *,const uchar *);
   void sort_string(uchar *buff,uint length);