About field

manual

JPA Entity Fields

Explains how to define and use primary keys in JPA, including composite and embedded primary keys.... Primary key (ID) fields Version field The first three groups (transient, persistent and inverse ... Fields Inverse Fields Version Field Property Access Primary key fields ...

 
api-jdo

javax.jdo.spi.StateManager

This interface is the point of contact between managed instances of PersistenceCapable classes and the JDO implementation.(Interface of JDO)

 
api-jdo

javax.jdo.spi.PersistenceCapable.ObjectIdFieldManager

This interface is a convenience interface that allows an instance to implement both ObjectIdFieldSupplier and ObjectIdFieldConsumer.(Interface of JDO)

 
manual

Schema Update

Explains how to handle JPA/JDO database schema evolution in ObjectDB.... <class name = "B" > <field name = "f1" new-name = "newF1" /> <field name = "f2" new-name = "newF2" /> </class ...

 
manual

Database Schema Evolution

Explains how ObjectDB handles automatically schema changes.... to entity classes that do not change their persistent field definitions (their schema) are transparent to ObjectDB. This includes ... Types Renaming (Package, Class and Field) Automatic Schema Evolution ObjectDB ... of an entity object to the new schema is done on a field by field basis: For every field in the new schema for ...

 
api-jdo

javax.jdo.spi.PersistenceCapable.ObjectIdFieldSupplier

This interface is used to provide fields to the Object id instance.(Interface of JDO)

 
api-jdo

javax.jdo.spi.PersistenceCapable.ObjectIdFieldConsumer

This interface is used to store fields from the Object id instance.(Interface of JDO)

 
manual

Chapter 2 - JPA Entity Classes

Explains how to define and use JPA entity classes and other JPA persistable types. JPA Entity classes are user defined classes whose instances can be stored in a database. To store data in an ObjectDB database using JPA you have to define entity classes that represent your application data object model. This chapter explai ...

 
manual

Index Definition

Describes how to define indexes in JPA entity classes and explains how indexes are used in JPQL queries.... page covers the following topics: Single Field Index Composite Index Multi Part Path Index Indexes in Queries Single Field Index JPA does not define a standard method for declaring indexes, ...

 
api-jdo

javax.jdo.spi.PersistenceCapable

A class that can be managed by a binary-compatible JDO implementation must implement this interface.(Interface of JDO)