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 #include <drizzled/session.h> 00023 #include <drizzled/join_table.h> 00024 #include <drizzled/sql_select.h> 00025 #include <drizzled/optimizer/access_method/const.h> 00026 00027 using namespace drizzled; 00028 00029 bool optimizer::Const::getStats(Table *table, 00030 JoinTable *join_tab) 00031 { 00032 table->status= STATUS_NO_RECORD; 00033 join_tab->read_first_record= join_read_const; 00034 join_tab->read_record.read_record= join_no_more_records; 00035 if (table->covering_keys.test(join_tab->ref.key) && 00036 ! table->no_keyread) 00037 { 00038 table->key_read= 1; 00039 table->cursor->extra(HA_EXTRA_KEYREAD); 00040 } 00041 return false; 00042 }