Drizzled Public API Documentation

show_create_table.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/show_dictionary/dictionary.h>
23 #include <drizzled/identifier.h>
24 #include <drizzled/message.h>
26 #include <google/protobuf/text_format.h>
27 #include <drizzled/plugin/authorization.h>
28 #include <string>
29 
30 using namespace std;
31 using namespace drizzled;
32 
33 ShowCreateTable::ShowCreateTable() :
34  show_dictionary::Show("TABLE_SQL_DEFINITION")
35 {
36  add_field("TABLE_NAME", plugin::TableFunction::STRING, MAXIMUM_IDENTIFIER_LENGTH, false);
37  add_field("TABLE_SQL_DEFINITION", plugin::TableFunction::STRING, TABLE_FUNCTION_BLOB_SIZE, false);
38 }
39 
40 ShowCreateTable::Generator::Generator(Field **arg) :
41  show_dictionary::Show::Generator(arg),
42  is_primed(false)
43 {
44  if (not isShowQuery())
45  return;
46 
47  statement::Show& select= static_cast<statement::Show&>(statement());
48 
49  if (not select.getShowTable().empty() && not select.getShowSchema().empty())
50  {
51  identifier::Table identifier(select.getShowSchema(), select.getShowTable());
52 
53  if (not plugin::Authorization::isAuthorized(*getSession().user(),
54  identifier, false))
55  {
56  drizzled::error::access(*getSession().user(), identifier);
57  return;
58  }
59 
60  table_message= plugin::StorageEngine::getTableMessage(getSession(),
61  identifier);
62 
63  if (table_message)
64  is_primed= true;
65  else
66  my_error(ER_BAD_TABLE_ERROR, identifier);
67  }
68 }
69 
70 bool ShowCreateTable::Generator::populate()
71 {
72  enum drizzled::message::TransformSqlError transform_err;
73 
74  if (not is_primed)
75  return false;
76 
77  std::string create_sql;
78  transform_err= message::transformTableDefinitionToSql(*table_message,
79  create_sql,
80  message::DRIZZLE,
81  false);
82  if (transform_err != drizzled::message::NONE)
83  {
84  return false;
85  }
86 
87  push(table_message->name());
88  push(create_sql);
89  is_primed= false;
90 
91  return true;
92 }