About delete

1-10 of 200Refresh
Manual
269

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
255

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
JDO Doc
69

InstanceLifecycleEvent.DELETE

Static Field javax.jdo.listener.InstanceLifecycleEvent int DELETE Since: JDO 2.0
JDO Doc
69

ObjectState.PERSISTENT_DELETED

Enum Constant javax.jdo.ObjectState PERSISTENT_DELETED Since: JDO 1.0
JDO Doc
69

ObjectState.PERSISTENT_NEW_DELETED

Enum Constant javax.jdo.ObjectState PERSISTENT_NEW_DELETED Since: JDO 1.0
Manual
41

Chapter 3 - Using JPA

Explains how to store, retrieve, update and delete entity objects using JPA.
Forum
33

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
25

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
Manual
25

CRUD Database Operations with JPA [2011-02-11]

it to store, retrieve, update and delete database objects. Storing New Entity Objects The following ... is a very powerful query language and chapter 4 of this manual describes it in detail. Updating and Deleting ... to retrieve them (e.g. as a Query factory). To delete an object from the database, you need to obtain
Manual
25

CRUD Database Operations with JPA

it to store, retrieve, update and delete database objects. Storing New Entity Objects The following ... is a very powerful query language and chapter 4 of this manual describes it in detail. Updating and Deleting ... to retrieve them (e.g. as a Query factory). To delete an object from the database, you need to obtain