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 #include <drizzled/item/ref.h> 00023 00024 namespace drizzled 00025 { 00026 00027 /* 00028 The same as Item_ref, but get value from val_* family of method to get 00029 value of item on which it referred instead of result* family. 00030 */ 00031 class Item_direct_ref :public Item_ref 00032 { 00033 public: 00034 Item_direct_ref(Name_resolution_context *context_arg, Item **item, 00035 const char *table_name_arg, 00036 const char *field_name_arg, 00037 bool alias_name_used_arg= false) 00038 :Item_ref(context_arg, item, table_name_arg, 00039 field_name_arg, alias_name_used_arg) 00040 {} 00041 /* Constructor need to process subselect with temporary tables (see Item) */ 00042 Item_direct_ref(Session *session, Item_direct_ref *item) : Item_ref(session, item) {} 00043 00044 double val_real(); 00045 int64_t val_int(); 00046 String *val_str(String* tmp); 00047 type::Decimal *val_decimal(type::Decimal *); 00048 bool val_bool(); 00049 bool is_null(); 00050 bool get_date(type::Time <ime,uint32_t fuzzydate); 00051 virtual Ref_Type ref_type() { return DIRECT_REF; } 00052 }; 00053 00054 } /* namespace drizzled */ 00055