~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

 *

 *  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

 */

#ifndef DRIZZLED_ITEM_CACHE_ROW_H

#define DRIZZLED_ITEM_CACHE_ROW_H

#include <drizzled/item/cache.h>

namespace drizzled

{

class Item_cache;

class Item;

class SendField;

class Item_cache_row: public Item_cache

{

  Item_cache  **values;

  uint32_t item_count;

  bool save_array;

public:

  Item_cache_row()

  :Item_cache(), values(0), item_count(2), save_array(0) {}

  /*

    'allocate' used only in row transformer, to preallocate space for row

    cache.

  */

  bool allocate(uint32_t num);

  /*

    'setup' is needed only by row => it not called by simple row subselect

    (only by IN subselect (in subselect optimizer))

  */

  bool setup(Item *item);

  void store(Item *item);

  void illegal_method_call(const char * method_name);

  void make_field(SendField *field);

  double val_real();

  int64_t val_int();

  String *val_str(String *val);

  my_decimal *val_decimal(my_decimal *val);

  enum Item_result result_type() const;

  uint32_t cols();

  Item *element_index(uint32_t i);

  Item **addr(uint32_t i);

  bool check_cols(uint32_t c);

  bool null_inside();

  void bring_value();

  void keep_array();

  void cleanup();

};

} /* namespace drizzled */

#endif /* DRIZZLED_ITEM_CACHE_ROW_H */