~drizzle-trunk/drizzle/development

2148.7.5 by Brian Aker
Move transactions out.
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/* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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 *
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 *  Copyright (C) 2011 Brian Aker
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 *
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 *  This program is free software; you can redistribute it and/or modify
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 *  it under the terms of the GNU General Public License as published by
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 *  the Free Software Foundation; either version 2 of the License, or
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 *  (at your option) any later version.
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 *
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 *  This program is distributed in the hope that it will be useful,
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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 *  GNU General Public License for more details.
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 *
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 *  You should have received a copy of the GNU General Public License
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 *  along with this program; if not, write to the Free Software
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 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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 */
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2234 by Brian Aker
Mass removal of ifdef/endif in favor of pragma once.
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#pragma once
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#include <deque>
2239.1.1 by Olaf van der Spek
Refactor includes
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#include <drizzled/named_savepoint.h>
2221.7.6 by Olaf van der Spek
Remove unused includes
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#include <drizzled/xid.h>
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2221.7.6 by Olaf van der Spek
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namespace drizzled {
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namespace session {
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/**
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 * Structure used to manage "statement transactions" and
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 * "normal transactions". In autocommit mode, the normal transaction is
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 * equivalent to the statement transaction.
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 *
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 * Storage engines will be registered here when they participate in
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 * a transaction. No engine is registered more than once.
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 */
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class Transactions 
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{
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public:
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  std::deque<NamedSavepoint> savepoints;
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  /**
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   * The normal transaction (since BEGIN WORK).
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   *
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   * Contains a list of all engines that have participated in any of the
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   * statement transactions started within the context of the normal
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   * transaction.
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   *
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   * @note In autocommit mode, this is empty.
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   */
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  TransactionContext all;
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  /**
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   * The statment transaction.
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   *
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   * Contains a list of all engines participating in the given statement.
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   *
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   * @note In autocommit mode, this will be used to commit/rollback the
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   * normal transaction.
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   */
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  TransactionContext stmt;
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  XID_STATE xid_state;
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  void cleanup()
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  {
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    savepoints.clear();
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  }
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};
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} /* namespace session */
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} /* namespace drizzled */
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