deleteOrphanedRevisions.php

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<?php
// @codeCoverageIgnoreStart
require_once __DIR__ . '/Maintenance.php';
// @codeCoverageIgnoreEnd
 
use Wikimedia\Rdbms\IDatabase;
 
class DeleteOrphanedRevisions extends Maintenance {
    public function __construct() {
        parent::__construct();
        $this->addDescription(
            '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 = $this->getPrimaryDB();
        $this->beginTransaction( $dbw, __METHOD__ );
 
        # Find all the orphaned revisions
        $this->output( "Checking for orphaned revisions..." );
        $res = $dbw->newSelectQueryBuilder()
            ->select( 'rev_id' )
            ->from( 'revision' )
            ->leftJoin( 'page', null, 'rev_page = page_id' )
            ->where( [ 'page_namespace' => null ] )
            ->caller( 'deleteOrphanedRevisions' )
            ->fetchResultSet();
 
        # Stash 'em all up for deletion (if needed)
        $revisions = [];
        foreach ( $res as $row ) {
            $revisions[] = $row->rev_id;
        }
        $count = count( $revisions );
        $this->output( "found {$count}.\n" );
 
        # Nothing to do?
        if ( $report || $count == 0 ) {
            $this->commitTransaction( $dbw, __METHOD__ );
            return;
        }
 
        # 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
        $this->commitTransaction( $dbw, __METHOD__ );
        $this->purgeRedundantText( true );
    }
 
    private function deleteRevs( array $id, $dbw ) {
        $dbw->newDeleteQueryBuilder()
            ->deleteFrom( 'revision' )
            ->where( [ 'rev_id' => $id ] )
            ->caller( __METHOD__ )->execute();
 
        // Delete from ip_changes should a record exist.
        $dbw->newDeleteQueryBuilder()
            ->deleteFrom( 'ip_changes' )
            ->where( [ 'ipc_rev_id' => $id ] )
            ->caller( __METHOD__ )->execute();
    }
}
 
// @codeCoverageIgnoreStart
$maintClass = DeleteOrphanedRevisions::class;
require_once RUN_MAINTENANCE_IF_MAIN;
// @codeCoverageIgnoreEnd