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Configuring an Object-Relational Data Type Descriptor (ELUG)
This section describes the various components that you must configure to be able to use an object-relational data type descriptor.
For information on how to configure EclipseLink descriptor options common to two or more descriptor types, see Configuring a Descriptor.
This table lists the configurable options for an object-relational data type descriptor.
Option to Configure | EclipseLink Workbench | Java |
---|---|---|
For more information, see Introduction to Relational Descriptors.
Configuring Field Ordering
If your object-relational data type data source driver uses JDBC indexed arrays, you can specify the order in which EclipseLink persists object attributes to define the field index.
How to Configure Field Ordering Using Java
Use ObjectRelationalDescriptor method addFieldOrdering to specify the field ordering. This example shows how to specify the order of the object-relational data type database fields OBJECT_ID, F_NAME, and L_NAME for the Employee descriptor.
Field Ordering
descriptor.addFieldOrdering("ID"); descriptor.addFieldOrdering("F_NAME"); descriptor.addFieldOrdering("L_NAME");