Query<SettlementTask> query = session.createQuery(
	"select " +
	"   rootAlias.id, " +
	"   linked.id, " +
	"   extensions.id " +
	"from SettlementTask as rootAlias " +
	"join rootAlias.linked as linked " +
	"left join linked.extensions as extensions " +
	"where linked.id = :claimId and (extensions is null or extensions.class = org.hibernate.internal.hhh12076.EwtAssessmentExtension)"
);
query.setParameter("claimId", 1L);