Drizzled Public API Documentation

referential_constraints.cc
1 /* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
2  * vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
3  *
4  * Copyright (C) 2010 Brian Aker
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; either version 2 of the License, or
9  * (at your option) any later version.
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 #include <plugin/information_schema_dictionary/dictionary.h>
23 
24 using namespace std;
25 using namespace drizzled;
26 
27 ReferentialConstraints::ReferentialConstraints() :
28  InformationSchema("REFERENTIAL_CONSTRAINTS")
29 {
30  add_field("CONSTRAINT_CATALOG");
31  add_field("CONSTRAINT_SCHEMA");
32  add_field("CONSTRAINT_NAME");
33  add_field("UNIQUE_CONSTRAINT_CATALOG");
34  add_field("UNIQUE_CONSTRAINT_SCHEMA");
35  add_field("UNIQUE_CONSTRAINT_NAME");
36  add_field("MATCH_OPTION");
37  add_field("UPDATE_RULE");
38  add_field("DELETE_RULE");
39 }
40 
41 ReferentialConstraints::Generator::Generator(drizzled::Field **arg) :
42  InformationSchema::Generator(arg),
43  foreign_key_generator(getSession())
44 {
45 }
46 
47 bool ReferentialConstraints::Generator::populate()
48 {
49  drizzled::generator::FieldPair field_pair;
50  while (!!(field_pair= foreign_key_generator))
51  {
52  const drizzled::message::Table *table_message= field_pair.first;
53  const message::Table::ForeignKeyConstraint &foreign_key(table_message->fk_constraint(field_pair.second));
54 
55  // CONSTRAINT_CATALOG
56  push(table_message->catalog());
57 
58  // CONSTRAINT_SCHEMA
59  push(table_message->schema());
60 
61  // CONSTRAINT_NAME
62  push(foreign_key.name());
63 
64  // UNIQUE_CONSTRAINT_CATALOG
65  push(table_message->catalog());
66 
67  // UNIQUE_CONSTRAINT_SCHEMA
68  push(table_message->schema());
69 
70  // UNIQUE_CONSTRAINT_NAME
71  push(" ");
72 
73  // MATCH_OPTION
74  push(drizzled::message::type(foreign_key.match()));
75 
76  //UPDATE_RULE
77  push(drizzled::message::type(foreign_key.update_option()));
78 
79  //DELETE_RULE
80  push(drizzled::message::type(foreign_key.delete_option()));
81 
82  return true;
83  }
84 
85  return false;
86 }