maintenance/deleteOrphanedRevisions.php

   1 <?php
   2
   3 /**
   4  * Maintenance script to delete revisions which refer to a nonexisting page
   5  * Sometimes manual deletion done in a rush leaves crap in the database
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  20  * http://www.gnu.org/copyleft/gpl.html
  21  *
  22  * @ingroup Maintenance
  23  * @author Rob Church <robchur@gmail.com>
  24  * @todo More efficient cleanup of text records
  25  */
  26
  27 require_once( dirname( __FILE__ ) . '/Maintenance.php' );
  28
  29 class DeleteOrphanedRevisions extends Maintenance {
  30         public function __construct() {
  31                 parent::__construct();
  32                 $this->mDescription = "Maintenance script to delete revisions which refer to a nonexisting page";
  33                 $this->addOption( 'report', 'Prints out a count of affected revisions but doesn\'t delete them' );
  34         }
  35
  36         public function execute() {
  37                 $this->output( "Delete Orphaned Revisions\n" );
  38
  39                 $report = $this->hasOption( 'report' );
  40
  41                 $dbw = wfGetDB( DB_MASTER );
  42                 $dbw->begin();
  43                 list( $page, $revision ) = $dbw->tableNamesN( 'page', 'revision' );
  44
  45                 # Find all the orphaned revisions
  46                 $this->output( "Checking for orphaned revisions..." );
  47                 $sql = "SELECT rev_id FROM {$revision} LEFT JOIN {$page} ON rev_page = page_id WHERE page_namespace IS NULL";
  48                 $res = $dbw->query( $sql, 'deleteOrphanedRevisions' );
  49
  50                 # Stash 'em all up for deletion (if needed)
  51                 $revisions = array();
  52                 foreach ( $res as $row )
  53                         $revisions[] = $row->rev_id;
  54                 $count = count( $revisions );
  55                 $this->output( "found {$count}.\n" );
  56
  57                 # Nothing to do?
  58                 if ( $report || $count == 0 ) {
  59                         $dbw->commit();
  60                         exit( 0 );
  61                 }
  62
  63                 # Delete each revision
  64                 $this->output( "Deleting..." );
  65                 $this->deleteRevs( $revisions, $dbw );
  66                 $this->output( "done.\n" );
  67
  68                 # Close the transaction and call the script to purge unused text records
  69                 $dbw->commit();
  70                 $this->purgeRedundantText( true );
  71         }
  72
  73         /**
  74          * Delete one or more revisions from the database
  75          * Do this inside a transaction
  76          *
  77          * @param $id Array of revision id values
  78          * @param $dbw DatabaseBase class (needs to be a master)
  79          */
  80         private function deleteRevs( $id, &$dbw ) {
  81                 if ( !is_array( $id ) )
  82                         $id = array( $id );
  83                 $dbw->delete( 'revision', array( 'rev_id' => $id ), __METHOD__ );
  84         }
  85 }
  86
  87 $maintClass = "DeleteOrphanedRevisions";
  88 require_once( RUN_MAINTENANCE_IF_MAIN );
  89