~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/dtcollation.h>

#include <drizzled/item_result.h>

namespace drizzled {

namespace type { class Decimal; }

typedef uint64_t query_id_t;

class user_var_entry

{

 public:

  user_var_entry(const char *arg, query_id_t id) :

    value(0),

    length(0),

    size(0),

    update_query_id(0),

    used_query_id(id),

    type(STRING_RESULT),

    unsigned_flag(false),

    collation(NULL, DERIVATION_IMPLICIT)

  { 

    name.str= strdup(arg);

    name.length= strlen(arg);

  }

  ~user_var_entry()

  {

    free(name.str);

    free(value);

  }

  LEX_STRING name;

  char *value;

  ulong length;

  size_t size;

  query_id_t update_query_id;

  query_id_t used_query_id;

  Item_result type;

  bool unsigned_flag;

  double val_real(bool *null_value);

  int64_t val_int(bool *null_value) const;

  String *val_str(bool *null_value, String *str, uint32_t decimals);

  type::Decimal *val_decimal(bool *null_value, type::Decimal *result);

  DTCollation collation;

  bool update_hash(bool set_null, void *ptr, uint32_t length,

                   Item_result type, const CHARSET_INFO * const cs, Derivation dv,

                   bool unsigned_arg);

};

} /* namespace drizzled */