diff --git a/mysql-test/r/olap.result b/mysql-test/r/olap.result
index c37a42d3fa7..a19734d55b5 100644
--- a/mysql-test/r/olap.result
+++ b/mysql-test/r/olap.result
@@ -555,3 +555,25 @@ IFNULL(a, 'TEST')	COALESCE(b, 'TEST')
 4	TEST
 TEST	TEST
 DROP TABLE t1,t2;
+CREATE TABLE t1(id int, type char(1));
+INSERT INTO t1 VALUES
+(1,"A"),(2,"C"),(3,"A"),(4,"A"),(5,"B"),
+(6,"B"),(7,"A"),(8,"C"),(9,"A"),(10,"C");
+CREATE VIEW v1 AS SELECT * FROM t1;
+SELECT type FROM t1 GROUP BY type WITH ROLLUP;
+type
+A
+B
+C
+NULL
+SELECT type FROM v1 GROUP BY type WITH ROLLUP;
+type
+A
+B
+C
+NULL
+EXPLAIN SELECT type FROM v1 GROUP BY type WITH ROLLUP;
+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;
diff --git a/mysql-test/r/view.result b/mysql-test/r/view.result
index e3431a3a466..f3c45d77637 100644
--- a/mysql-test/r/view.result
+++ b/mysql-test/r/view.result
@@ -1563,7 +1563,7 @@ one	1025,2025,3025
 two	1050,1050
 select col1,group_concat(col2,col3) from v1 group by col1;
 col1	group_concat(col2,col3)
-two	1025,2025,3025
+one	1025,2025,3025
 two	1050,1050
 drop view v1;
 drop table t1;
diff --git a/mysql-test/t/olap.test b/mysql-test/t/olap.test
index c75cad0b051..26fcc7463d6 100644
--- a/mysql-test/t/olap.test
+++ b/mysql-test/t/olap.test
@@ -250,3 +250,19 @@ SELECT IFNULL(a, 'TEST'), COALESCE(b, 'TEST') FROM t2
 
 DROP TABLE t1,t2;
 
+#
+# Tests for bug #11639: ROLLUP over view executed through filesort
+#
+
+CREATE TABLE t1(id int, type char(1));
+INSERT INTO t1 VALUES
+  (1,"A"),(2,"C"),(3,"A"),(4,"A"),(5,"B"),
+  (6,"B"),(7,"A"),(8,"C"),(9,"A"),(10,"C");
+CREATE VIEW v1 AS SELECT * FROM t1;
+
+SELECT type FROM t1 GROUP BY type WITH ROLLUP;
+SELECT type FROM v1 GROUP BY type WITH ROLLUP;
+EXPLAIN SELECT type FROM v1 GROUP BY type WITH ROLLUP;
+
+DROP VIEW v1;
+DROP TABLE t1;
diff --git a/sql/item.h b/sql/item.h
index 22641b8edd4..d5d4edb84d5 100644
--- a/sql/item.h
+++ b/sql/item.h
@@ -1440,7 +1440,10 @@ public:
     :Item_ident(thd, item), result_field(item->result_field), ref(item->ref) {}
   enum Type type() const		{ return REF_ITEM; }
   bool eq(const Item *item, bool binary_cmp) const
-  { return ref && (*ref)->eq(item, binary_cmp); }
+  { 
+    Item *it= ((Item *) item)->real_item();
+    return ref && (*ref)->eq(it, binary_cmp);
+  }
   double val_real();
   longlong val_int();
   my_decimal *val_decimal(my_decimal *);
diff --git a/sql/sql_select.cc b/sql/sql_select.cc
index c6a9bd54f9c..471b26c5ec3 100644
--- a/sql/sql_select.cc
+++ b/sql/sql_select.cc
@@ -12157,7 +12157,7 @@ count_field_types(TMP_TABLE_PARAM *param, List<Item> &fields,
   param->quick_group=1;
   while ((field=li++))
   {
-    Item::Type type=field->type();
+    Item::Type type=field->real_item()->type();
     if (type == Item::FIELD_ITEM)
       param->field_count++;
     else if (type == Item::SUM_FUNC_ITEM)
@@ -12171,7 +12171,7 @@ count_field_types(TMP_TABLE_PARAM *param, List<Item> &fields,
 
 	for (uint i=0 ; i < sum_item->arg_count ; i++)
 	{
-	  if (sum_item->args[0]->type() == Item::FIELD_ITEM)
+	  if (sum_item->args[0]->real_item()->type() == Item::FIELD_ITEM)
 	    param->field_count++;
 	  else
 	    param->func_count++;
@@ -12418,9 +12418,10 @@ setup_copy_fields(THD *thd, TMP_TABLE_PARAM *param,
   param->copy_funcs.empty();
   for (i= 0; (pos= li++); i++)
   {
-    if (pos->type() == Item::FIELD_ITEM)
+    if (pos->real_item()->type() == Item::FIELD_ITEM)
     {
       Item_field *item;
+      pos= pos->real_item();
       if (!(item= new Item_field(thd, ((Item_field*) pos))))
 	goto err;
       pos= item;