Drizzled Public API Documentation

int_with_ref.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 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 /*
00023   The following class is used to optimize comparing of date and bigint columns
00024   We need to save the original item ('ref') to be able to call
00025   ref->save_in_field(). This is used to create index search keys.
00026 
00027   An instance of Item_int_with_ref may have signed or unsigned integer value.
00028 
00029 */
00030 
00031 namespace drizzled
00032 {
00033 
00034 class Item_int_with_ref :public Item_int
00035 {
00036   Item *ref;
00037 public:
00038   Item_int_with_ref(int64_t i, Item *ref_arg, bool unsigned_arg) :
00039     Item_int(i), ref(ref_arg)
00040   {
00041     unsigned_flag= unsigned_arg;
00042   }
00043   int save_in_field(Field *field, bool no_conversions)
00044   {
00045     return ref->save_in_field(field, no_conversions);
00046   }
00047   Item *clone_item();
00048   virtual Item *real_item() { return ref; }
00049   virtual const Item *real_item() const { return ref; }
00050 };
00051 
00052 } /* namespace drizzled */
00053