changes based on partial revie of task 577 (SCRUM)

sql/item.cc:
  Fixed Item usual constructor to call current_thd only once.
  Fixed copy constructor to receive THD pointer via arguments.
  added comments
  removed counter-1 and unnessesary initializaton of counter
sql/item.h:
  Fixed copy constructor to receive THD pointer via arguments.
  Renamed get_same to copy_or_same.
  THD pointetr added to copy_or_same and get_tmp_table_item.
sql/item_cmpfunc.cc:
  fixed layout
  fixed direct call of destructor
sql/item_func.cc:
  fiex layout
  THD pointetr added to get_tmp_table_item.
sql/item_func.h:
  THD pointetr added to get_tmp_table_item.
sql/item_sum.cc:
  Fixed copy constructor to receive THD pointer via arguments.
  Renamed get_same to copy_or_same.
  THD pointetr added to copy_or_same and get_tmp_table_item.
sql/item_sum.h:
  fixed layout
  Fixed copy constructor to receive THD pointer via arguments.
  Renamed get_same to copy_or_same.
  THD pointetr added to copy_or_same and get_tmp_table_item.
sql/item_uniq.h:
  Fixed copy constructor to receive THD pointer via arguments.
  Renamed get_same to copy_or_same.
  THD pointetr added to copy_or_same and get_tmp_table_item.
sql/sql_base.cc:
  count from 0
sql/sql_select.cc:
  removed counter-1 and unnessesary initializaton of counter
  THD pointetr added to get_tmp_table_item and change_to_use_tmp_fields.

1 files changed, 6 insertions, 2 deletions

diff --git a/sql/item_uniq.h b/sql/item_uniq.h
index 9098dfe7d41..ac004e747f8 100644
--- a/sql/item_uniq.h
+++ b/sql/item_uniq.h
@@ -37,7 +37,8 @@ class Item_sum_unique_users :public Item_sum_num
 public:
   Item_sum_unique_users(Item *name_arg,int start,int end,Item *item_arg)
     :Item_sum_num(item_arg) {}
-  Item_sum_unique_users(Item_sum_unique_users &item): Item_sum_num(item) {}
+  Item_sum_unique_users(THD *thd, Item_sum_unique_users &item)
+    :Item_sum_num(thd, item) {}
   double val() { return 0.0; }  
   enum Sumfunctype sum_func () const {return UNIQUE_USERS_FUNC;}
   void reset() {}
@@ -49,5 +50,8 @@ public:
     fixed= 1;
     return 0;
   }
-  Item_sum * get_same() { return new Item_sum_unique_users(*this); }
+  Item_sum *copy_or_same(THD* thd)
+  {
+    return new Item_sum_unique_users(thd, *this);
+  }
 };