row IN subselects (SCRUM)

mysql-test/r/subselect.result:
  test of row IN subslect
mysql-test/t/subselect.test:
  test of row IN subslect
sql/item.cc:
  New helper Item - reference on item list by number
  cache item for row
sql/item.h:
  layout fixed 
  New helper Item - reference on item list by number
  cache item for row
sql/item_cmpfunc.cc:
  changed Item_in_optimizer to be able work with row
sql/item_cmpfunc.h:
  changed Item_in_optimizer to be able work with row
sql/item_row.cc:
  Fixed row Item to be compatible with row subselect
sql/item_row.h:
  Fixed row Item to be compatible with row subselect
sql/item_subselect.cc:
  changed name of class to corerectly reflex its function
  row IN subselect
sql/item_subselect.h:
  changed name of class to corerectly reflex its function
  row IN subselect
sql/sql_class.cc:
  changed name of class to corerectly reflex its function
sql/sql_class.h:
  changed name of class to corerectly reflex its function
sql/sql_yacc.yy:
  changed name of class to corerectly reflex its function

1 files changed, 5 insertions, 4 deletions

diff --git a/sql/item_cmpfunc.h b/sql/item_cmpfunc.h
index 41171da1338..e3d8eb7746d 100644
--- a/sql/item_cmpfunc.h
+++ b/sql/item_cmpfunc.h
@@ -91,14 +91,15 @@ class Item_in_optimizer: public Item_bool_func
 protected:
   Item_cache *cache;
 public:
-  Item_in_optimizer(Item *a,Item *b):
-    Item_bool_func(a,b), cache(0) {}
+  Item_in_optimizer(Item *a, Item_in_subselect *b):
+    Item_bool_func(a, (Item *)b), cache(0) {}
+  // used by row in transformer
+  bool preallocate_row();
   bool fix_fields(THD *, struct st_table_list *, Item **);
   bool is_null();
   longlong val_int();
   
-  Item **get_cache() { return (Item**)&cache; }
-
+  Item_cache **get_cache() { return &cache; }
 };
 
 class Item_bool_func2 :public Item_int_func