Hibernate HQL delete with and

Question

Hibernate doesn\'t delete my row:

public boolean deleteVote(Login user, int pid){

      Session session = getSession();

      try{
          String hql = \"del         


        

Answer 1

full java code with HQL & session.update

        try {

            try (Session session = this.sessionFactory.openSession()) {

                session.beginTransaction();

                String hql = "UPDATE Employee SET " +
                        "firstName = :firstName, " +
                        "lastName = :lastName," +
                        "gender = :gender," +
                        "jobTitle = :jobTitle," +
                        "departmentId = :departmentId " +
                        "where employeeId = :employeeId";

                Query query = session.createQuery(hql);

                query
                        .setParameter("employeeId", employee.getEmployeeId())
                        .setParameter("departmentId", employee.getDepartmentId())
                        .setParameter("firstName", employee.getFirstName())
                        .setParameter("lastName", employee.getLastName())
                        .setParameter("gender", employee.getGender())
                        .setParameter("jobTitle", employee.getJobTitle())
                ;

                int rows = query.executeUpdate();

//              session.update(Objects.requireNonNull(employee));

                session.getTransaction().commit();

                return session.get(Employee.class, employee.getEmployeeId()).equals(employee);
            }

        } catch (RuntimeException e) {
            e.printStackTrace();
            throw e;
        }

Answer 2

        int deletedRows = 0;
        try {
            session = sessionProvider.get();
            String hql = "delete from ApprovalRemark approvalRemark where approvalRemark.approvalItem.id =:approvalItemId ";
            Query query = session.createQuery(hql);
            query.setParameter("approvalItemId", approvalItemId);
            deletedRows = query.executeUpdate();
        } catch (javax.persistence.NoResultException e) {
            return false;
        } catch (HibernateException he) {
            log.error("deleteAllApprovalRemarksForApprovalItem exception", he);
            throw he;
        }
        log.debug("deleteAllApprovalRemarksForApprovalItem deleted " + deletedRows + " rows");
        return true;

Answer 3

You need to begin and commit a transaction.

Transaction transaction = session.beginTransaction();
try {
  // your code
  String hql = "delete from Vote where uid= :uid AND pid= :pid";
  Query query = session.createQuery(hql);
  System.out.println(user.getUid() + " and pid: " + pid);
  query.setString("uid", user.getUid());
  query.setInteger("pid", pid);
  System.out.println(query.executeUpdate());
  // your code end

  transaction.commit();
} catch (Throwable t) {
  transaction.rollback();
  throw t;
}

It is also possible that you need to close the session before the changes will be visible in the database.

Answer 4

From the Output you provided

uid: 123 and pid: 1
Hibernate: delete from votes where uid=? and pid=?
1

it is clear that query.executeUpdate() is returning 1. The method returns the number of entities updated or deleted. This means that 1 row has been updated or deleted, which is okay.

Try doing a session.flush() to flush the session, or a session.evict() to remove the object from the session.