使用带条令分页器的条令2执行原始SQL

我正在尝试分页,但出现了一个错误:

$dql = "SELECT cast(ip as CHAR) as ip FROM histories";
$query = $em->createQuery($dql)->setFirstResult($offset)->setMaxResults($limit); 
$paginator = new Paginator($query);  
$maxpage = ceil($paginator->count() / $limit);

错误

[语法错误]第0行第7列:错误:应为IdentificationVariable| ScalarExpression | AggregateeExpression | FunctionDeclaration| PartialObjectExpression |“(“Subselect”)”| CaseExpression,得到'*'

$maxpage=ceil($paginator->count()/$limit)//误差线