Merge olga.mysql.com:/home/igor/dev-opt/mysql-4.1-opt-bug27937

into  olga.mysql.com:/home/igor/dev-opt/mysql-5.0-opt-bug27937


mysql-test/r/ps.result:
  Manual merge
mysql-test/t/ps.test:
  Manual merge
sql/sql_union.cc:
  Manual merge

sql/sql_union.cc

@@ -147,8 +147,16 @@ st_select_lex_unit::init_prepare_fake_select_lex(THD *thd_arg)
   fake_select_lex->table_list.link_in_list((byte *)&result_table_list,
 					   (byte **)
 					   &result_table_list.next_local);
-  fake_select_lex->context.table_list= fake_select_lex->context.first_name_resolution_table= 
+  fake_select_lex->context.table_list= 
+    fake_select_lex->context.first_name_resolution_table= 
     fake_select_lex->get_table_list();
+  if (!fake_select_lex->first_execution)
+  {
+    for (ORDER *order= (ORDER *) global_parameters->order_list.first;
+         order;
+         order= order->next)
+      order->item= &order->item_ptr;
+  }
   for (ORDER *order= (ORDER *)global_parameters->order_list.first;
        order;
        order=order->next)