Pack of changes about 'cleanup()'-s

Some errorneous code trimmed


sql/item.cc:
  initialization of the Item_type_holder::orig_item added
sql/item.h:
  No use to call cleanup() in ~Item
  this only calls Item::cleanup()
  
  We should use item->delete_self() instead of 'delete item' now
  
  Code added to restore Item_type_holder::item_type value
sql/item_row.h:
  this cleanup is wrong
sql/item_sum.cc:
  initialization added
sql/item_sum.h:
  Item_xxx& -> Item_xxx*
sql/sql_parse.cc:
  delete item -> item->delete_self()

sql/item.cc

@@ -2024,7 +2024,8 @@ void Item_cache_row::bring_value()
 
 
 Item_type_holder::Item_type_holder(THD *thd, Item *item)
-  :Item(thd, item), item_type(item->result_type())
+  :Item(thd, item), item_type(item->result_type()),
+   orig_type(item_type)
 {
   DBUG_ASSERT(item->fixed);
 

sql/item.h

@@ -125,7 +125,7 @@ class Item {
      optimisation changes in prepared statements
   */
   Item(THD *thd, Item *item);
-  virtual ~Item() { name=0; cleanup(); }		/*lint -e1509 */
+  virtual ~Item() { name=0; }		/*lint -e1509 */
   void set_name(const char *str,uint length, CHARSET_INFO *cs);
   void init_make_field(Send_field *tmp_field,enum enum_field_types type);
   virtual void cleanup() { fixed=0; }
@@ -227,6 +227,11 @@ class Item {
   
   /* Used in sql_select.cc:eliminate_not_funcs() */
   virtual Item *neg_transformer() { return NULL; }
+  void delete_self()
+  {
+    cleanup();
+    delete this;
+  }
 };
 
 
@@ -1003,6 +1008,7 @@ class Item_type_holder: public Item
 {
 protected:
   Item_result item_type;
+  Item_result orig_type;
   Field *field_example;
 public:
   Item_type_holder(THD*, Item*);
@@ -1014,6 +1020,11 @@ class Item_type_holder: public Item
   String *val_str(String*);
   bool join_types(THD *thd, Item *);
   Field *example() { return field_example; }
+  void cleanup()
+  {
+    Item::cleanup();
+    item_type= orig_type;
+  }
 };
 
 

sql/item_row.h

@@ -34,16 +34,6 @@ class Item_row: public Item
     with_null(0)
   {}
 
-  void cleanup()
-  {
-    if (array_holder && items)
-    {
-      sql_element_free(items);
-      items= 0;
-      array_holder= 0;
-    }
-  }
-
   enum Type type() const { return ROW_ITEM; };
   void illegal_method_call(const char *);
   bool is_null() { return null_value; }

sql/item_sum.cc

@@ -1097,6 +1097,7 @@ void Item_sum_count_distinct::cleanup()
     if (use_tree)
       delete_tree(tree);
     table= 0;
+    use_tree= 0;
   }
 }
 

sql/item_sum.h

@@ -610,7 +610,7 @@ class Item_sum_udf_float :public Item_sum_num
  public:
   Item_sum_udf_float(udf_func *udf_arg) :Item_sum_num() {}
   Item_sum_udf_float(udf_func *udf_arg, List<Item> &list) :Item_sum_num() {}
-  Item_sum_udf_float(THD *thd, Item_sum_udf_float &item)
+  Item_sum_udf_float(THD *thd, Item_sum_udf_float *item)
     :Item_sum_num(thd, item) {}
   enum Sumfunctype sum_func () const { return UDF_SUM_FUNC; }
   double val() { return 0.0; }
@@ -625,7 +625,7 @@ class Item_sum_udf_int :public Item_sum_num
 public:
   Item_sum_udf_int(udf_func *udf_arg) :Item_sum_num() {}
   Item_sum_udf_int(udf_func *udf_arg, List<Item> &list) :Item_sum_num() {}
-  Item_sum_udf_int(THD *thd, Item_sum_udf_int &item)
+  Item_sum_udf_int(THD *thd, Item_sum_udf_int *item)
     :Item_sum_num(thd, item) {}
   enum Sumfunctype sum_func () const { return UDF_SUM_FUNC; }
   longlong val_int() { return 0; }
@@ -641,7 +641,7 @@ class Item_sum_udf_str :public Item_sum_num
 public:
   Item_sum_udf_str(udf_func *udf_arg) :Item_sum_num() {}
   Item_sum_udf_str(udf_func *udf_arg, List<Item> &list)  :Item_sum_num() {}
-  Item_sum_udf_str(THD *thd, Item_sum_udf_str &item)
+  Item_sum_udf_str(THD *thd, Item_sum_udf_str *item)
     :Item_sum_num(thd, item) {}
   String *val_str(String *) { null_value=1; return 0; }
   double val() { null_value=1; return 0.0; }

sql/sql_parse.cc

@@ -1109,7 +1109,7 @@ extern "C" pthread_handler_decl(handle_bootstrap,arg)
 void free_items(Item *item)
 {
   for (; item ; item=item->next)
-    delete item;
+    item->delete_self();
 }
 
     /* This works because items are allocated with sql_alloc() */