What is the LIMIT clause alternative in JPQL?

Question

I\'m working with PostgreSQL query implementing in JPQL.

This is a sample native psql query which works fine,

SELECT * FROM students ORDER BY id DESC         


        

Answer 1

As stated in the comments, JPQL does not support the LIMIT keyword.

You can achieve that using the setMaxResults but if what you want is just a single item, then use the getSingleResult - it throws an exception if no item is found.

So, your query would be something like:

TypedQuery query = entityManager.createQuery("SELECT s FROM Students s ORDER BY s.id DESC", Student.class);    
query.setMaxResults(1);

If you want to set a specific start offset, use query.setFirstResult(initPosition); too