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 <vector> 00025 00026 namespace drizzled 00027 { 00028 00029 namespace optimizer 00030 { 00031 00032 class compare_functor; 00033 00046 class QuickRorUnionSelect : public QuickSelectInterface 00047 { 00048 public: 00049 QuickRorUnionSelect(Session *session, Table *table); 00050 ~QuickRorUnionSelect(); 00051 00061 int init(); 00062 00072 int reset(void); 00073 00088 int get_next(); 00089 00090 bool reverse_sorted() const 00091 { 00092 return false; 00093 } 00094 00095 bool unique_key_range() const 00096 { 00097 return false; 00098 } 00099 00100 int get_type() const 00101 { 00102 return QS_TYPE_ROR_UNION; 00103 } 00104 00105 void add_keys_and_lengths(std::string *key_names, std::string *used_lengths); 00106 void add_info_string(std::string *str); 00107 bool is_keys_used(const boost::dynamic_bitset<>& fields); 00108 00109 bool push_quick_back(QuickSelectInterface *quick_sel_range); 00110 00111 std::vector<QuickSelectInterface *> quick_selects; 00114 std::priority_queue<QuickSelectInterface *, std::vector<QuickSelectInterface *>, compare_functor > *queue; 00115 memory::Root alloc; 00117 Session *session; 00118 unsigned char *cur_rowid; 00119 unsigned char *prev_rowid; 00120 bool have_prev_rowid; 00121 uint32_t rowid_length; 00122 private: 00123 bool scans_inited; 00124 }; 00125 00126 } /* namespace optimizer */ 00127 00128 } /* namespace drizzled */ 00129