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Difference between revisions of "Configuring an Object-Relational Data Type Descriptor (ELUG)"
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[[Special:Whatlinkshere/Configuring an Object-Relational Data Type Descriptor (ELUG)|Related Topics]]</div> | [[Special:Whatlinkshere/Configuring an Object-Relational Data Type Descriptor (ELUG)|Related Topics]]</div> | ||
− | + | For information on how to create object-relational data type descriptors, see [[Creating%20an%20Object-Relational%20Data%20Type%20Descriptor%20(ELUG)|Creating an Object-Relational Data Type Descriptor]]. | |
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This table lists the configurable options for an object-relational data type descriptor. | This table lists the configurable options for an object-relational data type descriptor. | ||
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For more information, see [[Introduction%20to%20Relational%20Descriptors%20(ELUG)|Introduction to Relational Descriptors]]. | For more information, see [[Introduction%20to%20Relational%20Descriptors%20(ELUG)|Introduction to Relational Descriptors]]. | ||
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==Configuring Field Ordering== | ==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. | 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. | ||
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Revision as of 12:47, 8 January 2008
For information on how to create object-relational data type descriptors, see Creating an Object-Relational Data Type Descriptor.
This table lists the configurable options for an object-relational data type descriptor.
Option to Configure | EclipseLink Workbench | Java |
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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");