Drizzled Public API Documentation

connection_id.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  *
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.
9  *
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.
14  *
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 #include <config.h>
21 #include <drizzled/function/math/int.h>
22 #include <drizzled/plugin/function.h>
23 #include <drizzled/session.h>
24 #include <drizzled/system_variables.h>
25 
26 using namespace std;
27 using namespace drizzled;
28 
30 {
31  int64_t value;
32 public:
34 
35  int64_t val_int()
36  {
37  assert(fixed == true);
38  return value;
39  }
40 
41  const char *func_name() const
42  {
43  return "connection_id";
44  }
45 
46  void fix_length_and_dec()
47  {
48  Item_int_func::fix_length_and_dec();
49  max_length= 10;
50  }
51 
52  bool fix_fields(Session *session, Item **ref)
53  {
54  if (Item_int_func::fix_fields(session, ref))
55  {
56  return true;
57  }
58 
59  value= session->variables.pseudo_thread_id;
60  return false;
61  }
62 
63  bool check_argument_count(int n)
64  {
65  return (n == 0);
66  }
67 };
68 
69 
70 plugin::Create_function<ConnectionIdFunction> *connection_idudf= NULL;
71 
72 static int initialize(module::Context &context)
73 {
74  connection_idudf=
75  new plugin::Create_function<ConnectionIdFunction>("connection_id");
76  context.add(connection_idudf);
77  return 0;
78 }
79 
80 DRIZZLE_DECLARE_PLUGIN
81 {
82  DRIZZLE_VERSION_ID,
83  "connection_id",
84  "1.0",
85  "Devananda van der Veen",
86  N_("CONNECTION_ID function"),
87  PLUGIN_LICENSE_GPL,
88  initialize,
89  NULL,
90  NULL
91 }
92 DRIZZLE_DECLARE_PLUGIN_END;