$tbl_rev = $dbw->tableName( 'revision' );
$set = implode( ', ', $ids );
$dbw->query( "DELETE FROM $tbl_rev WHERE rev_id IN ( $set )" );
$tbl_rev = $dbw->tableName( 'revision' );
$set = implode( ', ', $ids );
$dbw->query( "DELETE FROM $tbl_rev WHERE rev_id IN ( $set )" );