MDEV-29022 add_slave destroy child list and has dead code

Nowdays subquery in a UNION's ORDER BY placed correctly in fake select,
the only problem was incorrect Name_resolution_contect is fixed by this
patch in parsing, so we do not need scanning/reseting of ORDER BY of
a union.

1 files changed, 0 insertions, 9 deletions

diff --git a/sql/sql_union.cc b/sql/sql_union.cc
index 32d307de5e8..e831e2a479c 100644
--- a/sql/sql_union.cc
+++ b/sql/sql_union.cc
@@ -633,15 +633,6 @@ st_select_lex_unit::init_prepare_fake_select_lex(THD *thd_arg,
          order= order->next)
       order->item= &order->item_ptr;
   }
-  for (ORDER *order= global_parameters()->order_list.first;
-       order;
-       order=order->next)
-  {
-    (*order->item)->walk(&Item::change_context_processor, 0,
-                         &fake_select_lex->context);
-    (*order->item)->walk(&Item::set_fake_select_as_master_processor, 0,
-                         fake_select_lex);
-  }
 }