javax.persistence.ColumnResult - JPA annotation
javax.persistence
Annotation ColumnResult
- Target:
References name of a column in the SELECT clause of a SQL query - i.e., column alias, if applicable. Scalar result types can be included in the query result by specifying this annotation in the metadata.
Example:
Query q = em.createNativeQuery( "SELECT o.id AS order_id, " + "o.quantity AS order_quantity, " + "o.item AS order_item, " + "i.name AS item_name, " + "FROM Order o, Item i " + "WHERE (order_quantity > 25) AND (order_item = i.id)", "OrderResults"); @SqlResultSetMapping(name="OrderResults", entities={ @EntityResult(entityClass=com.acme.Order.class, fields={ @FieldResult(name="id", column="order_id"), @FieldResult(name="quantity", column="order_quantity"), @FieldResult(name="item", column="order_item")})}, columns={ @ColumnResult(name="item_name")} )
- Since:
- JPA 1.0
- See Also:
-
SqlResultSetMapping
String name
(Required) The name of a column in the SELECT clause of a SQL query
- Since:
- JPA 1.0
