About change

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Forum
19

Changing Primary Key

?     ObjectDB doesn't support changing primary keys, as it may break references to objects, indexes, etc. You can always migrate data to a new class. Trianglehead
Forum
18

Changes in detach behaviour?

Changes in detach behaviour?
Forum
18

Changing from client server to embedded mode

Changing from client server to embedded mode
Manual
17

JPA Entity Fields

provider (such as Hibernate) or to change default field settings. For example: @Entity public class ... class declaration above demonstrates using field and relationship annotations to change the default ... (the Employee class in our example) is the owner. Only changes to the owner side affect the database
Manual
16

Working with JPA Entity Objects

Entities section. If a managed entity object is modified within an active transaction the change ... commit.  See the Updating Entities section for more information about making changes to entities ... the EntityManager’s remove method within an active transaction. The entity object changes its state from
Manual
16

Retrieving JPA Entity Objects

. The retrieval of objects does not require an active transaction because it does not change the content ... that it references through its collection and map fields are not retrieved with it. This can be changed by ... of the managed object in memory is discarded (including changes, if any) and replaced by data that is retrieved
Result
13

How to upgrade from ObjectDB 1.0?

format. Effect on Existing Code Please note the following changes in ObjectDB 2.0: ObjectDB 2.0 ... only when the PersistenceManagerFactory closed, and until then changes might be applied only to the recovery file ... ="MyClass" embedded-only="true"> in package.jdo). Changes to native arrays (int[], Object
Result
13

ObjectDB Object Database Features

update - changes are detected automatically. Code enhancement is optional (recommended before ... changes are handled automatically. New added fields are handled automatically. Removed fields are handled automatically. Most field type changes are handled automatically. Moving fields up and down in
Manual
13

Shared (L2) Entity Cache

to the shared cache. JPA provides two properties that can be used in order to change the default behavior ... is not used. The default setting is USE. It can be changed for a specific EntityManager: em ... entity objects that are already cached. The default setting is USE. It can be changed for a specific
JDO Doc
12

javax.jdo.JDOEntityManager

, causing all managed entities to become detached. Changes made to entities that have not been flushed ... a managed entity to become detached. Unflushed changes made to the entity if any (including removal ... parameter, then this method returns it. There is no change made to the state of the returned instance