javax.persistence.EntityResult - JPA annotation
javax.persistence
Annotation EntityResult
- Target:
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:
- JPA 1.0
- See Also:
-
SqlResultSetMapping
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 value:
- ""
- Since:
- JPA 1.0
Class entityClass
The class of the result.
- Since:
- JPA 1.0
Maps the columns specified in the SELECT list of the query to the properties or fields of the entity class.
- Default value:
- {}
- Since:
- JPA 1.0
