~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/memory/sql_alloc.h>

#include <drizzled/lex_string.h>

namespace drizzled

{

namespace memory { class Root; }

class Item;

class Key_part_spec :public memory::SqlAlloc {

public:

  LEX_STRING field_name;

  uint32_t length;

  Key_part_spec(const LEX_STRING &name, uint32_t len)

    : field_name(name), length(len)

  {}

  Key_part_spec(const char *name, const size_t name_len, uint32_t len)

    : length(len)

  { field_name.str= const_cast<char *>(name); field_name.length= name_len; }

  bool operator==(const Key_part_spec& other) const;

  /**

    Construct a copy of this Key_part_spec. field_name is copied

    by-pointer as it is known to never change. At the same time

    'length' may be reset in mysql_prepare_create_table, and this

    is why we supply it with a copy.

    @return If out of memory, 0 is returned and an error is set in

    Session.

  */

  Key_part_spec *clone(memory::Root *mem_root) const

  {

    return new (mem_root) Key_part_spec(*this);

  }

};

} /* namespace drizzled */