~drizzle-trunk/drizzle/development

/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-

 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:

 *

 *  Copyright (C) 2008 Sun Microsystems, Inc.

 *

 *  This program is free software; you can redistribute it and/or modify

 *  it under the terms of the GNU General Public License as published by

 *  the Free Software Foundation; version 2 of the License.

 *

 *  This program is distributed in the hope that it will be useful,

 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *  GNU General Public License for more details.

 *

 *  You should have received a copy of the GNU General Public License

 *  along with this program; if not, write to the Free Software

 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

 */

#pragma once

#include <drizzled/function/str/strfunc.h>

namespace drizzled

{

class Item_func_make_set :public Item_str_func

{

  Session &session;

  Item *item;

  String tmp_str;

public:

  using Item::split_sum_func;

  Item_func_make_set(Session &session_arg, Item *a, List<Item> &list) :

    Item_str_func(list), 

    session(session_arg),

    item(a) {}

  String *val_str(String *str);

  bool fix_fields(Session *session_arg, Item **ref)

  {

    assert(fixed == 0);

    return ((!item->fixed && item->fix_fields(session_arg, &item)) ||

            item->check_cols(1) ||

            Item_func::fix_fields(session_arg, ref));

  }

  void split_sum_func(Session *session_arg, Item **ref_pointer_array, List<Item> &fields);

  void fix_length_and_dec();

  void update_used_tables();

  const char *func_name() const { return "make_set"; }

  bool walk(Item_processor processor, bool walk_subquery, unsigned char *arg)

  {

    return item->walk(processor, walk_subquery, arg) ||

      Item_str_func::walk(processor, walk_subquery, arg);

  }

  Item *transform(Item_transformer transformer, unsigned char *arg);

  virtual void print(String *str);

};

} /* namespace drizzled */