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, 5 insertions, 1 deletions

diff --git a/sql/item_sum.cc b/sql/item_sum.cc
index 7ded4921180..c2725ed28cf 100644
--- a/sql/item_sum.cc
+++ b/sql/item_sum.cc
@@ -51,7 +51,7 @@ Item_sum::Item_sum(THD *thd, Item_sum &item):
   else
     if (!(args=(Item**) sql_alloc(sizeof(Item*)*arg_count)))
       return;
-  for(uint i= 0; i < arg_count; i++)
+  for (uint i= 0; i < arg_count; i++)
     args[i]= item.args[i];
 }
 
@@ -999,6 +999,10 @@ int dump_leaf(byte* key, uint32 count __attribute__((unused)),
 
 Item_sum_count_distinct::~Item_sum_count_distinct()
 {
+  /*
+    Free table and tree if they belong to this item (if item have not pointer
+    to original item from which was made copy => it own its objects )
+  */
   if (!original)
   {
     if (table)