As far as now transformer called after setup_wild() it is impossible to have '*'

sql/item.cc

@@ -722,59 +722,6 @@ bool Item::fix_fields(THD *thd,
   return 0;
 }
 
-bool Item_asterisk_remover::fix_fields(THD *thd,
-				       struct st_table_list *list,
-				       Item ** ref)
-{
-  DBUG_ENTER("Item_asterisk_remover::fix_fields");
-  
-  bool res= 1;
-  if (item)
-    if (item->type() == Item::FIELD_ITEM &&
-	((Item_field*) item)->field_name[0] == '*')
-    {
-      Item_field *fitem=  (Item_field*) item;
-      if (list)
-	if (!list->next || fitem->db_name || fitem->table_name)
-	{
-	  TABLE_LIST *table= find_table_in_list(list,
-						fitem->db_name,
-						fitem->table_name);
-	  if (table)
-	  {
-	    TABLE * tb= table->table;
-	    if (find_table_in_list(table->next, fitem->db_name,
-				   fitem->table_name) != 0 ||
-		tb->fields == 1)
-	    {
-	      if ((item= new Item_field(tb->field[0])))
-	      {
-		res= 0;
-		tb->field[0]->query_id= thd->query_id;
-		tb->used_keys&= tb->field[0]->part_of_key;
-		tb->used_fields= tb->fields;
-	      }
-	      else
-		thd->fatal_error(); // can't create Item => out of memory
-	    }
-	    else
-	      my_error(ER_CARDINALITY_COL, MYF(0), 1);
-	  }
-	  else
-	    my_error(ER_BAD_TABLE_ERROR, MYF(0), fitem->table_name);
-	}
-	else
-	  my_error(ER_CARDINALITY_COL, MYF(0), 1);
-      else
-	my_error(ER_NO_TABLES_USED, MYF(0));
-    }   
-    else
-      res= item->fix_fields(thd, list, &item);
-  else
-    thd->fatal_error(); // no item given => out of memory
-  DBUG_RETURN(res);
-}
-
 bool Item_ref_on_list_position::fix_fields(THD *thd,
 					   struct st_table_list *tables,
 					   Item ** reference)

sql/item.h

@@ -626,6 +626,16 @@ public:
   }
 };
 
+class Item_null_helper :public Item_ref_null_helper
+{
+  Item *store;
+public:
+  Item_null_helper(Item_in_subselect* master, Item *item,
+		   const char *table_name_par, const char *field_name_par)
+    :Item_ref_null_helper(master, &store, table_name_par, field_name_par),
+     store(item)
+    {}
+};
 
 /*
   Used to find item in list of select items after '*' items processing.
@@ -654,32 +664,6 @@ public:
   bool fix_fields(THD *, struct st_table_list *, Item ** ref);
 };
 
-/*
-  To resolve '*' field moved to condition
-  and register NULL values
-*/
-class Item_asterisk_remover :public Item_ref_null_helper
-{
-  Item *item;
-public:
-  Item_asterisk_remover(Item_in_subselect *master, Item *it,
-			char *table, char *field):
-    Item_ref_null_helper(master, &item, table, field),
-    item(it) 
-  {}
-  bool fix_fields(THD *, struct st_table_list *, Item ** ref);
-  Item **storage() {return &item;}
-  void print(String *str)
-  {
-    str->append("ref_null_helper('");
-    if (item)
-      item->print(str);
-    else
-      str->append('?');
-    str->append(')');
-  }
-};
-
 /*
   The following class is used to optimize comparing of date columns
   We need to save the original item, to be able to set the field to the

sql/item_subselect.cc

@@ -559,27 +559,6 @@ Item_in_subselect::single_value_transformer(JOIN *join,
     if (select_lex->table_list.elements)
     {
       Item *having= item, *isnull= item;
-      if (item->type() == Item::FIELD_ITEM &&
-	  ((Item_field*) item)->field_name[0] == '*')
-      {
-	Item_asterisk_remover *remover;
-	item= remover= new Item_asterisk_remover(this, item,
-						 (char *)"<no matter>",
-						 (char *)"<result>");
-	if (!abort_on_null)
-	{
-	  having= 
-	    new Item_is_not_null_test(this,
-				      new Item_ref(remover->storage(),
-						   (char *)"<no matter>",
-						   (char *)"<null test>"));
-	  isnull=
-	    new Item_is_not_null_test(this,
-				      new Item_ref(remover->storage(),
-						   (char *)"<no matter>",
-						   (char *)"<null test>"));
-	}
-      }
       item= (*func)(expr, item);
       if (!abort_on_null)
       {
@@ -603,20 +582,10 @@ Item_in_subselect::single_value_transformer(JOIN *join,
     }
     else
     {
-      if (item->type() == Item::FIELD_ITEM &&
-	  ((Item_field*) item)->field_name[0] == '*')
-      {
-	my_error(ER_NO_TABLES_USED, MYF(0));
-	DBUG_RETURN(ERROR);
-      }
       if (select_lex->master_unit()->first_select()->next_select())
       {
-	/* 
-	   It is in union => we should perform it.
-	   Item_asterisk_remover used only as wrapper to receine NULL value
-	*/
 	join->having= (*func)(expr, 
-			      new Item_asterisk_remover(this, item,
+			      new Item_null_helper(this, item,
 						   (char *)"<no matter>",
 						   (char *)"<result>"));
 	select_lex->having_fix_field= 1;

sql/item_subselect.h

@@ -225,7 +225,6 @@ public:
   void top_level_item() { abort_on_null=1; }
   bool test_limit(st_select_lex_unit *unit);
 
-  friend class Item_asterisk_remover;
   friend class Item_ref_null_helper;
   friend class Item_is_not_null_test;
   friend class subselect_indexin_engine;