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<?php
/**
* Delete revisions which refer to a nonexisting page.
* Sometimes manual deletion done in a rush leaves crap in the database.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
* @ingroup Maintenance
* @author Rob Church <robchur@gmail.com>
* @todo More efficient cleanup of text records
*/
require_once __DIR__ . '/Maintenance.php';
/**
* Maintenance script that deletes revisions which refer to a nonexisting page.
*
* @ingroup Maintenance
*/
class DeleteOrphanedRevisions extends Maintenance {
public function __construct() {
parent::__construct();
$this->mDescription = "Maintenance script to delete revisions which refer to a nonexisting page";
$this->addOption( 'report', 'Prints out a count of affected revisions but doesn\'t delete them' );
}
public function execute() {
$this->output( "Delete Orphaned Revisions\n" );
$report = $this->hasOption( 'report' );
$dbw = wfGetDB( DB_MASTER );
$dbw->begin( __METHOD__ );
list( $page, $revision ) = $dbw->tableNamesN( 'page', 'revision' );
# Find all the orphaned revisions
$this->output( "Checking for orphaned revisions..." );
$sql = "SELECT rev_id FROM {$revision} LEFT JOIN {$page} ON rev_page = page_id "
. "WHERE page_namespace IS NULL";
$res = $dbw->query( $sql, 'deleteOrphanedRevisions' );
# Stash 'em all up for deletion (if needed)
$revisions = array();
foreach ( $res as $row ) {
$revisions[] = $row->rev_id;
}
$count = count( $revisions );
$this->output( "found {$count}.\n" );
# Nothing to do?
if ( $report || $count == 0 ) {
$dbw->commit( __METHOD__ );
exit( 0 );
}
# Delete each revision
$this->output( "Deleting..." );
$this->deleteRevs( $revisions, $dbw );
$this->output( "done.\n" );
# Close the transaction and call the script to purge unused text records
$dbw->commit( __METHOD__ );
$this->purgeRedundantText( true );
}
/**
* Delete one or more revisions from the database
* Do this inside a transaction
*
* @param array $id Array of revision id values
* @param DatabaseBase $dbw DatabaseBase class (needs to be a master)
*/
private function deleteRevs( $id, &$dbw ) {
if ( !is_array( $id ) ) {
$id = array( $id );
}
$dbw->delete( 'revision', array( 'rev_id' => $id ), __METHOD__ );
}
}
$maintClass = "DeleteOrphanedRevisions";
require_once RUN_MAINTENANCE_IF_MAIN;
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