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/function/func.h> 00023 00024 namespace drizzled 00025 { 00026 00027 class Item_func_numhybrid: public Item_func 00028 { 00029 protected: 00030 Item_result hybrid_type; 00031 public: 00032 Item_func_numhybrid(): Item_func(), hybrid_type(REAL_RESULT) 00033 {} 00034 Item_func_numhybrid(Item *a) :Item_func(a), hybrid_type(REAL_RESULT) 00035 {} 00036 Item_func_numhybrid(Item *a,Item *b) 00037 :Item_func(a,b), hybrid_type(REAL_RESULT) 00038 {} 00039 Item_func_numhybrid(List<Item> &list) 00040 :Item_func(list), hybrid_type(REAL_RESULT) 00041 {} 00042 00043 enum Item_result result_type () const { return hybrid_type; } 00044 void fix_length_and_dec(); 00045 void fix_num_length_and_dec(); 00046 virtual void find_num_type()= 0; /* To be called from fix_length_and_dec */ 00047 00048 double val_real(); 00049 int64_t val_int(); 00050 type::Decimal *val_decimal(type::Decimal *); 00051 String *val_str(String*str); 00052 00059 virtual int64_t int_op()= 0; 00060 00067 virtual double real_op()= 0; 00068 00079 virtual type::Decimal *decimal_op(type::Decimal *)= 0; 00080 00087 virtual String *str_op(String *)= 0; 00088 bool is_null() { update_null_value(); return null_value; } 00089 }; 00090 00091 } /* namespace drizzled */ 00092