Package javax.persistence
Annotation Type EntityResult
Used 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:
- Java Persistence 1.0
- See Also:
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Required Element Summary
Required Elements -
Optional Element Summary
Optional ElementsModifier and TypeOptional ElementDescriptionSpecifies the column name (or alias) of the column in the SELECT list that is used to determine the type of the entity instance.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 Details
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entityClass
Class entityClassThe class of the result. -
fields
FieldResult[] fieldsMaps 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 discriminatorColumnSpecifies 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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