Drizzled Public API Documentation

select_max_min_finder_subselect.h

00001 /* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
00002  *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
00003  *
00004  *  Copyright (C) 2008 Sun Microsystems, Inc.
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; version 2 of the License.
00009  *
00010  *  This program is distributed in the hope that it will be useful,
00011  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00012  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00013  *  GNU General Public License for more details.
00014  *
00015  *  You should have received a copy of the GNU General Public License
00016  *  along with this program; if not, write to the Free Software
00017  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
00018  */
00019 
00020 #pragma once
00021 
00022 namespace drizzled
00023 {
00024 
00025 /* used in independent ALL/ANY optimisation */
00026 class select_max_min_finder_subselect :public select_subselect
00027 {
00028   Item_cache *cache;
00029   bool (select_max_min_finder_subselect::*op)();
00030   bool fmax;
00031 public:
00032   select_max_min_finder_subselect(Item_subselect *item_arg, bool mx)
00033     :select_subselect(item_arg), cache(0), fmax(mx)
00034   {}
00035   void cleanup();
00036   bool send_data(List<Item> &items);
00037   bool cmp_real();
00038   bool cmp_int();
00039   bool cmp_decimal();
00040   bool cmp_str();
00041 };
00042 
00043 } /* namespace drizzled */
00044