updating multiple rows using JPA

Question

I want to update all fields of a table that has value of colum NAME as \'PCNAME\'. The table name which i want to update is XYZ.I want to update only some fields and not kee

Answer 1

Since Java Persistence 2.1 you can use CriteriaUpdate to do bulk updates using the Criteria API.

CriteriaUpdate criteriaUpdate = builder.createCriteriaUpdate(Entity.class)
     .set(root.get("field"), value)
     .where(predicates);
int updated = entityManager.createQuery(criteriaUpdate).executeUpdate();

Keep in mind:

Criteria API bulk update operations map directly to database update operations, bypassing any optimistic locking checks. Portable applications using bulk update operations must manually update the value of the version column, if desired, and/or manually validate the value of the version column. The persistence context is not synchronized with the result of the bulk update.