olap.result, olap.test:

  Added a test case with VIEW for bug #12885.

mysql-test/r/olap.result

@@ -602,3 +602,19 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	10	Using filesort
 DROP VIEW v1;
 DROP TABLE t1;
+CREATE TABLE t1 (a int(11) NOT NULL);
+INSERT INTO t1 VALUES (1),(2);
+CREATE VIEW v1 AS
+SELECT a, LENGTH(a), COUNT(*) FROM t1 GROUP BY a WITH ROLLUP;
+DESC v1;
+Field	Type	Null	Key	Default	Extra
+a	bigint(11)	YES		NULL	
+LENGTH(a)	bigint(10)	YES		NULL	
+COUNT(*)	bigint(21)	NO		0	
+SELECT * FROM v1;
+a	LENGTH(a)	COUNT(*)
+1	1	1
+2	1	1
+NULL	NULL	2
+DROP VIEW v1;
+DROP TABLE t1;

mysql-test/t/olap.test

@@ -263,8 +263,8 @@ SELECT a, b, a AS c, COUNT(*) AS count FROM t1 GROUP BY a, b, c WITH ROLLUP;
 DROP TABLE t1;
 
 #
-# Bug #11885:  derived table specified by a subquery with
-#              ROLLUP over expressions on not nullable group by attributes 
+# Bug #12885(1): derived table specified by a subquery with
+#                ROLLUP over expressions on not nullable group by attributes 
 #
 
 CREATE TABLE t1 (a int(11) NOT NULL);
@@ -294,4 +294,19 @@ EXPLAIN SELECT type FROM v1 GROUP BY type WITH ROLLUP;
 DROP VIEW v1;
 DROP TABLE t1;
 
+#
+# Bug #12885(2): view specified by a subquery with
+#                ROLLUP over expressions on not nullable group by attributes 
+#
+
+CREATE TABLE t1 (a int(11) NOT NULL);
+INSERT INTO t1 VALUES (1),(2);
 
+CREATE VIEW v1 AS
+  SELECT a, LENGTH(a), COUNT(*) FROM t1 GROUP BY a WITH ROLLUP;
+
+DESC v1;
+SELECT * FROM v1;
+
+DROP VIEW v1;
+DROP TABLE t1;