Spring JPA: Use CriteriaBuilder to filter on a datetime between two instants - spring

Question

I'm setting up a method to filter entries by the "lastupdated" column. I'm trying to filter entries of which the lastupdated value is between a given startTime and endTime.
I'm using the simplified code below:
public List<SomeEntity> getItemsByLastUpdated() {
CriteriaBuilder cb = entityManager.getCriteriaBuilder();
CriteriaQuery<SomeEntity> criteriaQuery = cb.createQuery(SomeEntity.class);
var root = criteriaQuery.from(SomeEntity.class);
var predicates = new ArrayList<>();
var startTime = Instant.now();
var endTime = Instant.now().plus(5, MINUTES);
predicates.add(cb.greaterThanOrEqualTo(root.get("lastupdated"), startTime));
predicates.add(cb.lessThan(root.get("lastupdated"), endTime));
criteriaQuery.where(predicates.toArray(new Predicate[0]));
return entityManager.createQuery(criteriaQuery).getResultList();
}
For some reason, the criteria for datetime fields are not (correctly) being applied: All the entities are being returned instead of only the items within the startTime-endTime range.
I'm guessing that I need to explicitly state that the "lastupdated" field is a datetime field; when I set startTime to Instant.MAX, I receive an error that seems to hint on a date filter instead of datetime:
Invalid value for EpochDay (valid values -365243219162 - 365241780471): 365241780838
Would anyone know how I can filter on a datetime field being between two given java Instants?
PS. I'm aware of using derived queries such as findByXGreaterThanOrEqualToAndXLessThan(Instant instant1, Instant instant2); but since there are several other criterias which I have not included, this option is not feasible.

Answer 1

I think you could easily do the same using EntityManager and JPQL instead of Criteria API:
public List<SomeEntity> getItemsByLastUpdated() {
var query = "select e from SomeEntity e
where e.lastupdated >= :from
and e.lastupdated < :to
and your_other_criteria";
return entityManager.createQuery(query)
.setParameter("from", startTime)
.setParameter("to", endTime)
.getResultList();
}

Answer 2

It took me quite some time to figure it out; turned out that the lack of filtering didn't have anything to do with the CriteriaBuilder setup.
I had created a test to verify the method, and prepared some entities before running the test. However, the "lastupdated" field in the entity class was annotated with #UpdateTimestamp, which would result in all the saved entities having pretty much the same 'lastupdated' value.