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Difference between revisions of "EclipseLink/UserGuide/JPA/2.4/a array"
< EclipseLink | UserGuide | JPA
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Use <code>@Array</code> to define object-relational data types supported by specific databases, such as Oracle <code>VARRAY</code> types or PostgreSQL <code>JDBC Struct</code> types. | Use <code>@Array</code> to define object-relational data types supported by specific databases, such as Oracle <code>VARRAY</code> types or PostgreSQL <code>JDBC Struct</code> types. | ||
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[[#CBABBAJF|Table 2-1]] describes this annotation's elements. | [[#CBABBAJF|Table 2-1]] describes this annotation's elements. | ||
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Use <code>@Array</code> on a collection attribute that is persisted to an <code>Array</code> type. The collection can be of basic types or embeddable class mapped using a <code>Struct</code>. | Use <code>@Array</code> on a collection attribute that is persisted to an <code>Array</code> type. The collection can be of basic types or embeddable class mapped using a <code>Struct</code>. | ||
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===Examples=== | ===Examples=== | ||
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For more information, see the following: | For more information, see the following: | ||
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Revision as of 09:49, 7 June 2012
', 2.4.x'
| Java Persistence API (JPA) Extensions Reference for EclipseLink Version 2.4.x |
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@Array
Use @Array to define object-relational data types supported by specific databases, such as Oracle VARRAY types or PostgreSQL JDBC Struct types.
Annotation Elements
Table 2-1 describes this annotation's elements.
Table 2-1 @Array Annotation Elements
| Annotation Element | Description | Default |
|---|---|---|
|
|
(Required) The name of the database array structure type. |
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|
|
(Optional only if the collection field or property is defined using Java generics; otherwise Required) The class (basic or embeddable) that is the element type of the collection. |
Parameterized type of the collection. |
Usage
Use @Array on a collection attribute that is persisted to an Array type. The collection can be of basic types or embeddable class mapped using a Struct.
Examples
Example 2-1 Using @Array with Oracle VARRAY
Example 2-2 Using @Array with Postgress Struct
See Also
For more information, see the following:
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