EclipseLink/UserGuide/JPA/Basic JPA Development/Mapping/Basic Mappings/Transient

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Key API

• @Transient

@Transient

By default, EclipseLink persistence provider assumes that all the fields of an entity are persistent.

Use the @Transient annotation or <transient> XML to specify a field or property of an entity that is not persistent (for example, a field or property that is used at run time, but that is not part of the entity's state).

EclipseLink persistence provider will not persist (or create database schema) for a property or field annotated with @Transient.

This annotation can be used with @Entity, @MappedSuperclass, and @Embeddable.

For more information, see Section 8.1 "Entity" in the JPA Specification.

The @Transient annotation does not have attributes.

If a field is marked as Java transient it will also be ignored.

The following example shows how to use the @Transient annotation to specify Employee field currentSession as not persistent. EclipseLink persistence provider will not persist this field.

Example: @Transient Annotation

@Entity
public class Employee implements Serializable {
    @Id
    int id;
 
    @Transient
    Session currentSession;
    ...
}

Example: Using <transient> XML

<entity class="Employee">
    <attributes>
        <id name="id"/>
        <transient name="currentSession"/>
        ...
    </attributes>
</entity>

For more information, see Section 11.1.48 "Transient Annotation" in the JPA Specification.

Version: 2.1.0
Other versions...

@Lob	Basic Mappings	@Column
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