96 | Memory error during commit, if @ElementCollection field contains many elementsMemory error during commit, if @ElementCollection field contains many elements |
16 | Setting and Tuning of JPA Queries em can be visible to anyone who uses em, even before committing the transaction (but not to users ... , which has two values: AUTO - changes are flushed before query execution and on commit/flush. COMMIT - changes are flushed only on explicit commit/flush. In most JPA implementations the default is AUTO. In |
16 | Locking in JPA separately. Optimistic locking is applied on transaction commit. Any database object ... is being performed on an old version of a database object, for which another update has already been committed ... must be revealed earlier (before transaction commit) pessimistic locking can be used. When using |
14 | Database Connection using JPA(); // Operations that modify the database should come here. em.getTransaction().commit ... (); } A transaction is started by a call to begin and ended by a call to either commit or rollback ... a transaction with a commit propagates all the modifications physically to the database. If for any |
12 | JPA Lifecycle Events (added to the EntityManager). @PostPersist - after storing a new entity in the database (during commit or ... the database (during commit or flush). @PreRemove - when an entity is marked for removal in the EntityManager. @PostRemove - after deleting an entity from the database (during commit or flush). An entity |
12 | Auto Generated Values id; : } During a commit the AUTO strategy uses the global number generator to generate ... also generates an automatic value during commit for every new entity object. The difference is that a separate ... is persisted (i.e. before commit). This may be useful when the primary key value is needed earlier |
12 | Deleting JPA Entity Objects); em.getTransaction().begin(); em.remove(employee); em.getTransaction().commit(); The entity object is physically deleted from the database when the transaction is committed. Embedded ... back and not committed the object is not deleted. An IllegalArgumentException is thrown by remove |
12 | Working with JPA Entity Objects via an EntityManager’s persist method, which must be invoked within an active transaction. On transaction commit ... commit. See the Updating Entities section for more information about making changes to entities ... to Removed, and is physically deleted from the database during commit. More details on object |
10 | Database Management Settings of the database file, with $ added at the end. Every transaction commit is first written to the recovery file ... (whose value is "true" or "false") specifies if physical writing is required before commit returns |
10 | DELETE Queries in JPA/JPQL. Applying changes to the database by calling the commit method. JPQL DELETE queries provide ... (who use other EntityManager instances) only after commit. Delete All Queries The simplest form |
