Implement the Query->iterate method which will return an IteratableResultSet as per the ORM.

Query->getSingleResult correctly throws an Exception when there are no results (or more than one), but it is an Exception that could also be produced by other things, so not guaranteed to mean that (
(http://docs.doctrine-project.org/projects/doctrine-phpcr-odm/en/latest/reference/query.html#getsingleresult)

There is getQOMFactory method in PHPCR\Util\QOM\QueryBuilder (very useful) but it isn't in Doctrine\ODM\PHPCR\Query\QueryBuilder (it breaks bc).

Is it mistake or there is/will be another method to access QOMFactory instance?

$criteria = Criteria::create();
$criteria
    ->andWhere(
        $criteria->expr()->contains('r.body', 'foo')
    )
;

$entities = $repo->createQueryBuilder()->addCriteria($criteria)->getQuery()->getResult();

Throws the following exception:

RuntimeException: Unknown comparison operator: CONTAINS

I except it to properly handle the CONTAINS comparison and result in a LIKE operator.

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I added a failing test case & a fix there: https://github.com/borisguery/doctrine2/tree/DDC-2394