Is there such thing CASE expression in JPQL?

Question

Let say there is a table:

TableA:Field1, Field2, Field3

and associated JPA entity class

@Entity
@Table(name=\"TableA\")
pub         


        

Answer 1

There is certainly such thing in Hibernate so when you use Hibernate as your JPA provider then you can write your query as in this example:

    Query query = entityManager.createQuery("UPDATE MNPOperationPrintDocuments o SET o.fileDownloadCount = CASE WHEN o.fileDownloadCount IS NULL THEN 1 ELSE (o.fileDownloadCount + 1) END " +
                                            " WHERE o IN (:operations)");
    query.setParameter("operations", mnpOperationPrintDocumentsList);

    int result = query.executeUpdate();