fixed bug of lack of fix_fields call (after merge bugfix (SCRUM))

fixed bug in Item_sum
fixed bug in dependence remover
after merge fix


mysql-test/r/subselect.result:
  after merge fix
mysql-test/r/union.result:
  new test
mysql-test/t/subselect.test:
  after merge fix
mysql-test/t/union.test:
  new test
sql/item.cc:
  fixed returned value
sql/item.h:
  fixed flag dropper
  (I was not able to find Item whicj need more to be fix_fielded twice)
sql/item_subselect.h:
  fixed initialisation
sql/item_sum.cc:
  fixed absence of walk method of Item_sum
sql/item_sum.h:
  fixed absence of walk method of Item_sum
sql/mysql_priv.h:
  setup_fields reverter
sql/sql_base.cc:
  setup_fields reverter
sql/sql_derived.cc:
  fixed bug of lack of fix_fields call
sql/sql_union.cc:
  fixed bug of lack of fix_fields call

1 files changed, 14 insertions, 0 deletions

diff --git a/sql/item_sum.cc b/sql/item_sum.cc
index 1d3e608c31c..b029bcf2b87 100644
--- a/sql/item_sum.cc
+++ b/sql/item_sum.cc
@@ -118,6 +118,20 @@ Item *Item_sum::get_tmp_table_item(THD *thd)
   return sum_item;
 }
 
+bool Item_sum::walk (Item_processor processor, byte *argument)
+{
+  if (arg_count)
+  {
+    Item **arg,**arg_end;
+    for (arg= args, arg_end= args+arg_count; arg != arg_end; arg++)
+    {
+      if ((*arg)->walk(processor, argument))
+	return 1;
+    }
+  }
+  return (this->*processor)(argument);
+}
+
 String *
 Item_sum_num::val_str(String *str)
 {