maintenance/sqlite.php

   1 <?php
   2 /**
   3  * Performs some operations specific to SQLite database backend
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   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 along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @ingroup Maintenance
  21  */
  22
  23 require_once( dirname(__FILE__) . '/Maintenance.php' );
  24
  25 class SqliteMaintenance extends Maintenance {
  26         public function __construct() {
  27                 parent::__construct();
  28                 $this->mDescription = "Performs some operations specific to SQLite database backend";
  29                 $this->addOption( 'vacuum', 'Clean up database by removing deleted pages. Decreases database file size' );
  30                 $this->addOption( 'integrity', 'Check database for integrity' );
  31         }
  32
  33         public function execute() {
  34                 global $wgDBtype;
  35
  36                 if ( $wgDBtype != 'sqlite' ) {
  37                         $this->error( "This maintenance script requires a SQLite database.\n" );
  38                         return;
  39                 }
  40
  41                 $this->db = wfGetDB( DB_MASTER );
  42
  43                 if ( $this->hasOption( 'vacuum' ) )
  44                         $this->vacuum();
  45
  46                 if ( $this->hasOption( 'integrity' ) )
  47                         $this->integrityCheck();
  48         }
  49
  50         private function vacuum() {
  51                 $prevSize = filesize( $this->db->mDatabaseFile );
  52
  53                 $this->output( 'VACUUM: ' );
  54                 if ( $this->db->query( 'VACUUM' ) ) {
  55                         clearstatcache();
  56                         $newSize = filesize( $this->db->mDatabaseFile );
  57                         $this->output( sprintf( "Database size was %d, now %d (%.1f%% reduction).\n",
  58                                 $prevSize, $newSize, ( $prevSize - $newSize) * 100.0 / $prevSize ) );
  59                 } else {
  60                         $this->output( 'Error\n' );
  61                 }
  62         }
  63
  64         private function integrityCheck() {
  65                 $this->output( "Performing database integrity checks:\n" );
  66                 $res = $this->db->query( 'PRAGMA integrity_check' );
  67
  68                 if ( !$res || $res->numRows() == 0 ) {
  69                         $this->error( "Error: integrity check query returned nothing.\n" );
  70                         return;
  71                 }
  72
  73                 foreach ( $res as $row ) {
  74                         $this->output( $row->integrity_check );
  75                 }
  76         }
  77 }
  78
  79 $maintClass = "SqliteMaintenance";
  80 require_once( DO_MAINTENANCE );