void Item_args::propagate_equal_fields(THD *thd,
                                       const Item::Context &ctx,
                                       COND_EQUAL *cond)
{
  uint i;
  for (i= 0; i < arg_count; i++)
    args[i]->propagate_equal_fields_and_change_item_tree(thd, ctx, cond,
                                                         &args[i]);
}
void Item_args::propagate_equal_fields(THD *thd,
                                       const Item::Context &ctx,
                                       COND_EQUAL *cond)
{
  uint i;
  for (i= 0; i < arg_count; i++)
    args[i]->propagate_equal_fields_and_change_item_tree(thd, ctx, cond,
                                                         &args[i]);
}