About setFlushMode

manual

Setting and Tuning of JPA Queries

Explains various JPA query settings - result range, flush and lock.... (setFirstResult, setMaxResults) Flush Mode (setFlushMode) Lock Mode (setLockMode) Query Hints ... object on which they were invoked). Flush Mode (setFlushMode) Changes made to a database using an EntityManager ...

 
api-jpa

setFlushMode(flushMode)

Set the flush mode type to be used for the query execution.(Method of javax.persistence.TypedQuery)

 
api-jpa

setFlushMode(flushMode)

Set the flush mode that applies to all objects contained in the persistence context.(Method of javax.persistence.EntityManager)

 
api-jpa

setFlushMode(flushMode)

Set the flush mode type to be used for the query execution.(Method of javax.persistence.Query)

 
forum_thread

Performance in large transactions

Hello, we have a performance problem when we use a large transaction. Let's do exactly the same in several transactions the ObjectDB works much faster. In our use case, we create many new entities and between the creations we call a select query. The execution of the query becomes slower at each iteration. (In the query, we search for an item of type Entity2. However, there is only one entity.)   Pseudocode for the fast and the slow solution FAST: ... ( ) ; entityManager. setFlushMode ( FlushModeType . AUTO ) ; ... ( ) ; entityManager. setFlushMode ( FlushModeType . AUTO ) ; ... emf. createEntityManager ( ) ; em. setFlushMode ( FlushModeType . AUTO ) ; em. ...

 
api-jpa

javax.persistence.TypedQuery

Interface used to control the execution of typed queries.(Interface of JPA)

 
forum_thread

Performance and memory usage of queries

Hello, we can't understand why the performance of queries is not the best and the execution requires so much memory. In the implementation of our UnitTests we have used "DELETE FROM Object" to delete the database. That did not work because we often get an "out of memory" exception. What's all done in the execution of queries? Why is so much memory is required, although from the application point of view, no object is loaded. ... emf. createEntityManager ( ) ; em. setFlushMode ( FlushModeType . AUTO ) ; em. ... emf. createEntityManager ( ) ; em. setFlushMode ( FlushModeType . AUTO ) ; em. ...

 
forum_thread

Entity has be persistended,but query not fetched?

I create a new entity T newT and persistend it,then I create a query "select t from T t" to fetch all T entities.But  then the newT is not contain in the query result. Why? ... the query result. Why? code order: query. setFlushMode ( FlushModeType . AUTO ) ; ... "SELECT u FROM User u" ) ; query. setFlushMode ( FlushModeType . AUTO ) ; ...

 
api-jpa

javax.persistence.Query

Interface used to control query execution.(Interface of JPA)

 
forum_thread

Duplicate Entity class names causes Exception in Query

I have two Entities which have the same class name but reside in different packages, only one of them is mentioned in the persistence.xml. I a NamedQuery I use the unqualified class name of one of these entities. If I execute that query I get an exception;   ... , Long. class ) ; q. setFlushMode ( FlushModeType . AUTO ) ; try ... transaction to db if we wish to see its results q. setFlushMode ( FlushModeType . AUTO ) ; try ... transaction to db if we wish to see its results q. setFlushMode ( FlushModeType . COMMIT ) ; ...