Drizzled Public API Documentation

direct_ref.h
1 /* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
2  * vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
3  *
4  * Copyright (C) 2008 Sun Microsystems, Inc.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; version 2 of the License.
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10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  * GNU General Public License for more details.
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15  * You should have received a copy of the GNU General Public License
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17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18  */
19 
20 #pragma once
21 
22 #include <drizzled/item/ref.h>
23 
24 namespace drizzled {
25 
26 /*
27  The same as Item_ref, but get value from val_* family of method to get
28  value of item on which it referred instead of result* family.
29 */
30 class Item_direct_ref : public Item_ref
31 {
32 public:
33  Item_direct_ref(Name_resolution_context *context_arg, Item **item,
34  const char *table_name_arg,
35  const char *field_name_arg,
36  bool alias_name_used_arg= false)
37  :Item_ref(context_arg, item, table_name_arg,
38  field_name_arg, alias_name_used_arg)
39  {}
40  /* Constructor need to process subselect with temporary tables (see Item) */
41  Item_direct_ref(Session *session, Item_direct_ref *item) : Item_ref(session, item) {}
42 
43  double val_real();
44  int64_t val_int();
45  String *val_str(String* tmp);
47  bool val_bool();
48  bool is_null();
49  bool get_date(type::Time &ltime,uint32_t fuzzydate);
50  virtual Ref_Type ref_type() { return DIRECT_REF; }
51 };
52 
53 } /* namespace drizzled */
54