About bulk delete

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Manual
123

DELETE Queries in JPA/JPQL

As explained in chapter 2, entity objects can be deleted from the database by: Retrieving ... . Applying changes to the database by calling the commit method. JPQL DELETE queries provide an alternative way for deleting entity objects. Unlike SELECT queries, which are used to retrieve data from
Manual
119

Deleting JPA Entity Objects

Existing entity objects can be deleted from the database either explicitly by invoking the remove method or implicitly as a result of a cascade operation. Explicit Remove In order to delete an object ... transaction, it can be deleted using the remove method: Employee employee = em.find(Employee.class, 1
Forum
56

Bulk Delete and Update - best practice?

The attached test creates 1000 large objects and then attempts to delete them all in one go using a DELETE statement. I'm trying to run with -Xmx512m but the test runs out of memory during the delete ... both tests with the default objectdb.conf. In general is an UPDATE/DELETE statement the most efficient way
JDO Doc
33

InstanceLifecycleEvent.DELETE

Static Field javax.jdo.listener.InstanceLifecycleEvent int DELETE Since: JDO 2.0
JDO Doc
33

ObjectState.PERSISTENT_DELETED

Enum Constant javax.jdo.ObjectState PERSISTENT_DELETED Since: JDO 1.0
JDO Doc
33

ObjectState.PERSISTENT_NEW_DELETED

Enum Constant javax.jdo.ObjectState PERSISTENT_NEW_DELETED Since: JDO 1.0
Issue
18

Bulk load of eager mapped by (inverse) relationships

and collection of objects that have to be loaded eagerly are loaded in bulk for better performance ... in a bulk load, which means that every reference requires running a separate query and doing ... ) fields in bulk as well. Bulk load of eager mapped by (inverse) singular references is now supported in build 2.4.4_13. kborkowski lwalkowski
Forum
15

Delete object from collection versus delete from JPQL

persist() to write them to the database.  But does running a JPQL update or delete alter the in-memory ... , but I'm not sure if that will alter my program state.  Will it? Thanks, Lee  UPDATE and DELETE queries ... between memory and database objects. See these manual pages for more details: DELETE queries UPDATE
Forum
11

Handling deleted references

Hi support team, I have a problem when using DELETE query to delete Entity instances. We use ... has a profile. To reset a profile I run a DELETE query on the old profile , hoping that this would lead ... , which simply checks if the profile instance is such a "intermediate/deleted" instance. Is there a way
Forum
11

Unable to delete the .odb file programatically

Hi, I created the test.odb file, read the contents and now trying the delete the odb file using ... , when i am trying to delete the file using the followng code     File[] files = parentDir.listFiles();     for (File temp : files ) {         boolean deleted = file.delete(); // getting false