Package jakarta.persistence
Annotation Type EntityResult
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@Target({}) @Retention(RUNTIME) public @interface EntityResult
Used in conjunction with theSqlResultSetMapping
annotation to map the SELECT clause of a SQL query to an entity result.If this annotation is used, the SQL statement should select all of the columns that are mapped to the entity object. This should include foreign key columns to related entities. The results obtained when insufficient data is available are undefined.
Example: Query q = em.createNativeQuery( "SELECT o.id, o.quantity, o.item, i.id, i.name, i.description "+ "FROM Order o, Item i " + "WHERE (o.quantity > 25) AND (o.item = i.id)", "OrderItemResults"); @SqlResultSetMapping(name="OrderItemResults", entities={ @EntityResult(entityClass=com.acme.Order.class), @EntityResult(entityClass=com.acme.Item.class) })
- Since:
- 1.0
- See Also:
SqlResultSetMapping
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Required Element Summary
Required Elements Modifier and Type Required Element Description Class
entityClass
The class of the result.
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Optional Element Summary
Optional Elements Modifier and Type Optional Element Description String
discriminatorColumn
Specifies the column name (or alias) of the column in the SELECT list that is used to determine the type of the entity instance.FieldResult[]
fields
Maps the columns specified in the SELECT list of the query to the properties or fields of the entity class.
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Element Detail
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entityClass
Class entityClass
The class of the result.
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fields
FieldResult[] fields
Maps the columns specified in the SELECT list of the query to the properties or fields of the entity class.- Default:
- {}
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discriminatorColumn
String discriminatorColumn
Specifies the column name (or alias) of the column in the SELECT list that is used to determine the type of the entity instance.- Default:
- ""
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