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
