Coming from the discussion https://hibernate.zulipchat.com/#narrow/stream/132096-hibernate-user/topic/H5.20vs.2E.20H6.3A.20Access.20JPQL.20for.20criteria.20builder.20queries, the task is to introduce some sort of context for the org.hibernate.query.sqm.tree.SqmVisitableNode#appendHqlString method, such that a mapping of parameters to generated parameter names can be built, so that we can render the HQL representation in a way that contains a named parameter for JPA Criteria values.