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Update and Select in one Hibernate query


Update and Select in one Hibernate query

By : Md Rasel
Date : November 19 2020, 03:01 PM
wish help you to fix your issue OK. Got it solved but have no clue what is different.
Solution below:
code :
@Transactional(propagation = Propagation.REQUIRED, isolation = Isolation.READ_COMMITTED)
private void setFailedCount(String user_id) throws Exception {

      Session session = sessionFactory.openSession();
      Transaction tx = session.beginTransaction();
      String hqlUpdate = "UPDATE User SET loginDate= CURRENT_TIMESTAMP, loginAttempts=(SELECT COUNT(*) FROM loginHistory WHERE user_id=:user_id AND response!=:response AND TIMESTAMPDIFF(MINUTE,valTime,CURRENT_TIMESTAMP) <= 30*24*60) WHERE user_id=:user_id";
      int updatedEntities = session.createQuery( hqlUpdate )
              .setParameter("user_id", user_id)
              .setParameter("response", "OK")
              .executeUpdate();
      tx.commit();
      session.close();

   }


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JPA 2.0 / Hibernate - why hibernate issue select count (*) query before delete

JPA 2.0 / Hibernate - why hibernate issue select count (*) query before delete


By : xsf
Date : March 29 2020, 07:55 AM
To fix the issue you can do JPA only exposes a remove(…) method on EntityManager that takes the entity to be deleted. So for your call to delete(…) with the id we first check whether an entity with the id really existst (first query). We then materialize the object (second query) to eventually hand it to EntityManager.remove(…) (query 3 and 4).
Actually the exists(…) check is superfluous as we can simply check for null in the second step. I've created and fixed DATAJPA-363, so that you should see one query less in the future.
Spring Hibernate @Data update vs raw UPDATE query: Optimistic Lock Exception despite @Transactional?

Spring Hibernate @Data update vs raw UPDATE query: Optimistic Lock Exception despite @Transactional?


By : Hemangi
Date : March 29 2020, 07:55 AM
will help you I'm not sure why you think that @Transactional should make your OptimisticLockingException go away. Optimistic locking is all about concurrency of different transactions.
It works by incrementing a version in each transaction and also checking on updates that the version is still unchanged from when the entity was loaded.
Do select and update as a single query using java hibernate criteria API

Do select and update as a single query using java hibernate criteria API


By : Sajeda Malkawi
Date : March 29 2020, 07:55 AM
seems to work fine Yes, it is possible to one query using criteria.
I am writing one example. I hope it is helpful to you.
Confusing about dynamic-update and select-before-update in detached object in HIbernate

Confusing about dynamic-update and select-before-update in detached object in HIbernate


By : Amr Elfar
Date : March 29 2020, 07:55 AM
Does that help dynamic-update="true" should be used in conjunction with select-before-update=true Also, if If you use Session.merge(), According to Hibernate doc, version/timestamp columns should be used as a optimistic locking strategy in order for Session.merge() to handle correctly modifications made to detached instances If a Hibernate Session gets closed (for example you display a web page), the persistent instance of an entity (one that has a representation in the database and a identifier value) will become a detached instance (one that isn't attached to a Session anymore - but can still be modified and reattached to a new Session in subsequent request).
Hope some of this helps.
Hibernate model class config doesn't reflect in CREATE TABLE query with "hibernate.hbm2ddl.auto = update"

Hibernate model class config doesn't reflect in CREATE TABLE query with "hibernate.hbm2ddl.auto = update"


By : MillionSky
Date : March 29 2020, 07:55 AM
wish help you to fix your issue I'm working on a Spring(4.x)-Hibernate(5.2.x) web-application project. , With current version of jpa (hibernate provider),
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