Drizzled Public API Documentation

quick_ror_intersect_select.h

00001 /* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
00002  *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
00003  *
00004  *  Copyright (C) 2008-2009 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 #include <drizzled/optimizer/range.h>
00023 
00024 #include <boost/dynamic_bitset.hpp>
00025 #include <vector>
00026 
00027 namespace drizzled
00028 {
00029 
00030 namespace optimizer
00031 {
00032 
00050 class QuickRorIntersectSelect : public QuickSelectInterface
00051 {
00052 public:
00053 
00054   QuickRorIntersectSelect(Session *session, 
00055                              Table *table,
00056                              bool retrieve_full_rows,
00057                              memory::Root *parent_alloc);
00058 
00059   ~QuickRorIntersectSelect();
00060 
00070   int init();
00071 
00080   int reset(void);
00081 
00101   int get_next();
00102 
00103   bool reverse_sorted() const
00104   {
00105     return false;
00106   }
00107 
00108   bool unique_key_range() const
00109   {
00110     return false;
00111   }
00112 
00113   int get_type() const
00114   {
00115     return QS_TYPE_ROR_INTERSECT;
00116   }
00117 
00118   void add_keys_and_lengths(std::string *key_names, std::string *used_lengths);
00119   void add_info_string(std::string *str);
00120   bool is_keys_used(const boost::dynamic_bitset<>& fields);
00121 
00132   int init_ror_merged_scan(bool reuse_handler);
00133 
00148   bool push_quick_back(QuickRangeSelect *quick_sel_range);
00149 
00154   std::vector<QuickRangeSelect *> quick_selects;
00155 
00160   QuickRangeSelect *cpk_quick;
00161 
00162   memory::Root alloc; 
00163   Session *session; 
00164   bool need_to_fetch_row; 
00166   bool scans_inited;
00167 };
00168 
00169 } /* namespace optimizer */
00170 
00171 } /* namespace drizzled */
00172