findAll() method is giving the empty result set in Hibernate

Question

In hibernate I used findById() and findAll() in Dao layer.findById() method working as I expected, but findAll() always returns empty result set,I still couldn't figure out the reason, any one could help me to solve this issue,

Note: There is no exception, returns only empty list

Here is my code

Find All method

 public List<T> findAll() {
        Query query = getSession().createQuery("SELECT obj FROM " + persistentClass.getSimpleName() + " obj");
        return query.list()
    }

Find by Id method

public T findById(Long id) {
        T result = (T) getSession().get(getPersistentClass(), id);
        return result;
    }

getSession method

protected Session getSession() {
        if (session == null)
            session = tenantBasedSessionFactory.getTenantBasedSession("tenantId");
//            throw new IllegalStateException("Session has not been set on DAO before usage");
        return session;
    }

Thank you in advance Cheers

Solution

I can't see any issues with that, assuming the entity name is accurate and data is present, but did you try the short notation already?

Query query = getSession().createQuery("FROM " + persistentClass.getSimpleName());

I find it better to read for simple 'get all' queries as you don't need any aliases if only one entity is returned.