/* -*- 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
 */

#ifndef DRIZZLED_FUNCTION_ROLLUP_CONST_H
#define DRIZZLED_FUNCTION_ROLLUP_CONST_H

#include <drizzled/function/func.h>


namespace drizzled
{

/*
  Objects of this class are used for ROLLUP queries to wrap up
  each constant item referred to in GROUP BY list.
*/

class Item_func_rollup_const :public Item_func
{
public:
  Item_func_rollup_const(Item *a) :Item_func(a)
  {
    name= a->name;
    name_length= a->name_length;
  }
  double val_real() { return args[0]->val_real(); }
  int64_t val_int() { return args[0]->val_int(); }
  String *val_str(String *str) { return args[0]->val_str(str); }
  type::Decimal *val_decimal(type::Decimal *dec) { return args[0]->val_decimal(dec); }
  const char *func_name() const { return "rollup_const"; }
  bool const_item() const { return 0; }
  Item_result result_type() const { return args[0]->result_type(); }
  void fix_length_and_dec()
  {
    collation= args[0]->collation;
    max_length= args[0]->max_length;
    decimals=args[0]->decimals;
    /* The item could be a NULL constant. */
    null_value= args[0]->is_null();
  }
};

} /* namespace drizzled */

#endif /* DRIZZLED_FUNCTION_ROLLUP_CONST_H */
