Drizzled Public API Documentation

show_temporary_tables.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 
23 #include <plugin/show_dictionary/dictionary.h>
24 #include <drizzled/open_tables_state.h>
25 
26 using namespace std;
27 using namespace drizzled;
28 
29 ShowTemporaryTables::ShowTemporaryTables() :
30  show_dictionary::Show("SHOW_TEMPORARY_TABLES")
31 {
32  add_field("TABLE_SCHEMA", plugin::TableFunction::STRING, MAXIMUM_IDENTIFIER_LENGTH, false);
33  add_field("TABLE_NAME", plugin::TableFunction::STRING, MAXIMUM_IDENTIFIER_LENGTH, false);
34  add_field("RECORDS", plugin::TableFunction::NUMBER, 0, false);
35  add_field("RECORD_LENGTH", plugin::TableFunction::NUMBER, 0, false);
36  add_field("ENGINE");
37 }
38 
39 ShowTemporaryTables::Generator::Generator(Field **arg) :
40  show_dictionary::Show::Generator(arg),
41  session(getSession())
42 {
43  table= session.open_tables.getTemporaryTables();
44 }
45 
46 bool ShowTemporaryTables::Generator::populate()
47 {
48  while (table)
49  {
50  if (not isWild(table->getShare()->getTableName()))
51  {
52  break;
53  }
54  table= table->getNext();
55  }
56 
57  if (not table)
58  return false;
59 
60  fill();
61 
62  table= table->getNext();
63 
64  return true;
65 }
66 
67 void ShowTemporaryTables::Generator::fill()
68 {
69  /* TABLE_SCHEMA */
70  push(table->getShare()->getSchemaName());
71 
72  /* TABLE_NAME */
73  push(table->getShare()->getTableName());
74 
75  /* RECORDS */
76  push(static_cast<uint64_t>(table->getCursor().records()));
77 
78  /* RECORD_LENGTH */
79  push(static_cast<uint64_t>(table->getRecordLength()));
80 
81  /* ENGINE */
82  push(table->getEngine()->getName());
83 }