after-review changes (577 SCRUM)

sql/item.cc:
  typo fix
sql/item.h:
  typo fix
sql/item_cmpfunc.cc:
  comment
sql/item_func.cc:
  new interface
sql/item_subselect.cc:
  comment inserted
sql/item_sum.cc:
  layout fixed
  comment inserted
sql/mysql_priv.h:
  names changed
sql/sql_base.cc:
  some optimization
sql/sql_delete.cc:
  name changed
sql/sql_insert.cc:
  name changed
sql/sql_lex.h:
  name changed
sql/sql_prepare.cc:
  layout fixed
sql/sql_select.cc:
  layout fixed
  names changed
  comments inserted
  debugging code removed
sql/sql_select.h:
  name changed
sql/sql_union.cc:
  name changed
  layout fixed
sql/sql_update.cc:
  name changed
sql/sql_yacc.yy:
  typo fixed

1 files changed, 7 insertions, 1 deletions

diff --git a/sql/item_subselect.cc b/sql/item_subselect.cc
index e98572817ef..21acb31a7d5 100644
--- a/sql/item_subselect.cc
+++ b/sql/item_subselect.cc
@@ -150,7 +150,13 @@ void Item_singlerow_subselect::select_transformer(THD *thd,
   
   if (!select_lex->next_select() && !select_lex->table_list.elements &&
       select_lex->item_list.elements == 1 &&
-      // TODO: mark subselect items from item list separately
+      /*
+	We cant change name of Item_field or Item_ref, because it will
+	prevent it's correct resolving, but we should save name of
+	removed item => we do not make optimization if top item of
+	list is field or reference.
+	TODO: solve above problem
+      */
       !(select_lex->item_list.head()->type() == FIELD_ITEM ||
 	select_lex->item_list.head()->type() == REF_ITEM) 
       )