Drizzled Public API Documentation

default_value.h
1 /* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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3  *
4  * Copyright (C) 2008 Sun Microsystems, Inc.
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6  * This program is free software; you can redistribute it and/or modify
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8  * the Free Software Foundation; version 2 of the License.
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11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
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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
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18  */
19 
20 #pragma once
21 
22 #include <drizzled/item/ident.h>
23 #include <drizzled/item/field.h>
24 
25 namespace drizzled {
26 
28 {
29 public:
30  Item *arg;
32  :Item_field(context_arg, (const char *)NULL, (const char *)NULL,
33  (const char *)NULL),
34  arg(NULL) {}
36  :Item_field(context_arg, (const char *)NULL, (const char *)NULL,
37  (const char *)NULL),
38  arg(a) {}
39  enum Type type() const { return DEFAULT_VALUE_ITEM; }
40  bool eq(const Item *item, bool binary_cmp) const;
41  bool fix_fields(Session *, Item **);
42  virtual void print(String *str);
43  int save_in_field(Field *field_arg, bool no_conversions);
44  table_map used_tables() const { return (table_map)0L; }
45 
46  bool walk(Item_processor processor, bool walk_subquery, unsigned char *args)
47  {
48  return arg->walk(processor, walk_subquery, args) ||
49  (this->*processor)(args);
50  }
51 
52  Item *transform(Item_transformer transformer, unsigned char *args);
53 };
54 
55 } /* namespace drizzled */
56 
bool eq(const Item *item, bool binary_cmp) const
virtual void print(String *str)
Item * transform(Item_transformer transformer, unsigned char *args)
table_map used_tables() const
Definition: default_value.h:44