Drizzled Public API Documentation

access_method_factory.cc
00001 /* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
00002  *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
00003  *
00004  *  Copyright (C) 2010 Padraig O'Sullivan
00005  *
00006  *  This program is free software; you can redistribute it and/or modify
00007  *  it under the terms of the GNU General Public License as published by
00008  *  the Free Software Foundation; either version 2 of the License, or
00009  *  (at your option) any later version.
00010  *
00011  *  This program is distributed in the hope that it will be useful,
00012  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014  *  GNU General Public License for more details.
00015  *
00016  *  You should have received a copy of the GNU General Public License
00017  *  along with this program; if not, write to the Free Software
00018  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
00019  */
00020 
00021 #include <config.h>
00022 
00023 #include <drizzled/sql_select.h>
00024 #include <drizzled/join_table.h>
00025 #include <drizzled/optimizer/access_method.h>
00026 #include <drizzled/optimizer/access_method_factory.h>
00027 #include <drizzled/optimizer/access_method/system.h>
00028 #include <drizzled/optimizer/access_method/const.h>
00029 #include <drizzled/optimizer/access_method/unique_index.h>
00030 #include <drizzled/optimizer/access_method/index.h>
00031 #include <drizzled/optimizer/access_method/scan.h>
00032 
00033 #include <boost/shared_ptr.hpp>
00034 
00035 using namespace drizzled;
00036 
00037 boost::shared_ptr<optimizer::AccessMethod>
00038 optimizer::AccessMethodFactory::createAccessMethod(enum access_method type)
00039 {
00040   boost::shared_ptr<optimizer::AccessMethod> am_ret;
00041 
00042   switch (type)
00043   {
00044   case AM_SYSTEM:
00045     am_ret.reset(new optimizer::System());
00046     break;
00047   case AM_CONST:
00048     am_ret.reset(new optimizer::Const());
00049     break;
00050   case AM_EQ_REF:
00051     am_ret.reset(new optimizer::UniqueIndex());
00052     break;
00053   case AM_REF_OR_NULL:
00054   case AM_REF:
00055     am_ret.reset(new optimizer::Index());
00056     break;
00057   case AM_ALL:
00058     am_ret.reset(new optimizer::Scan());
00059     break;
00060   default:
00061     break;
00062   }
00063   
00064   return am_ret;
00065 }
00066