~ubuntu-branches/ubuntu/quantal/drizzle/quantal

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

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

 *

 *  Copyright (C) 2009 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; either version 2 of the License, or

 *  (at your option) any later version.

 *

 *  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/definitions.h>

#include <drizzled/error.h>

#include <drizzled/sql_parse.h>

#include <drizzled/sql_base.h>

#include <drizzled/show.h>

namespace drizzled {

class Session;

class TableList;

class Item;

namespace session { class Transactions; }

namespace statement {

/**

 * @class Statement

 * @brief Represents a statement to be executed

 */

class Statement

{

public:

  Statement(Session *in_session) :

    _session(*in_session)

  {}

  virtual ~Statement() {}

  void set_command(enum_sql_command);

  LEX& lex();

  session::Transactions& transaction();

  /**

   * Execute the statement.

   *

   * @return true on failure; false on success

   */

  virtual bool execute()= 0;

  /* True if can be in transaction. Currently only DDL is not.

     This should go away when DDL commands are within transactions. */

  virtual bool isTransactional()

  {

    return false;

  }

  Session& session() const

  {

    return _session;

  }

  virtual bool isShow() { return false; }

private:

  Session& _session;

};

} /* namespace statement */

} /* namespace drizzled */