Drizzled Public API Documentation

coercibility_function.cc
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  * Copyright (C) 2010 Andrew Hutchings
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; version 2 of the License.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include <config.h>
22 
23 #include <drizzled/plugin/function.h>
24 #include <drizzled/function/math/int.h>
25 
26 using namespace drizzled;
27 
29 {
30 public:
32  {
33  unsigned_flag= true;
34  }
35 
36  int64_t val_int();
37 
38  const char *func_name() const
39  {
40  return "coercibility";
41  }
42 
43  void fix_length_and_dec()
44  {
45  max_length=10; maybe_null= 0;
46  }
47 
48  table_map not_null_tables() const
49  {
50  return 0;
51  }
52 
54  {
55  return (n == 1);
56  }
57 };
58 
60 {
61  assert(fixed == 1);
62  null_value= 0;
63  return (int64_t) args[0]->collation.derivation;
64 }
65 
66 plugin::Create_function<CoercibilityFunction> *coercibility_function= NULL;
67 
68 static int initialize(drizzled::module::Context &context)
69 {
70  coercibility_function= new plugin::Create_function<CoercibilityFunction>("coercibility");
71  context.add(coercibility_function);
72  return 0;
73 }
74 
75 DRIZZLE_DECLARE_PLUGIN
76 {
77  DRIZZLE_VERSION_ID,
78  "coercibility",
79  "1.0",
80  "Andrew Hutchings",
81  N_("COERCIBILITY function"),
82  PLUGIN_LICENSE_GPL,
83  initialize,
84  NULL,
85  NULL
86 }
87 DRIZZLE_DECLARE_PLUGIN_END;
table_map not_null_tables() const