Module jakarta.persistence

Package jakarta.persistence

Annotation Interface FieldResult

@Target({})
@Retention(RUNTIME)
public @interface FieldResult

Used in conjunction with the EntityResult annotation to map columns specified in the SELECT list of a SQL query to the properties or fields of an entity class.

Example:

Query q = em.createNativeQuery(
    "SELECT o.id AS order_id, " +
        "o.quantity AS order_quantity, " +
        "o.item AS order_item, " +
      "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")
            })
    })

Since:

1.0

See Also:

• EntityResult
• SqlResultSetMapping

Required Element Summary

Required Elements

Modifier and Type	Required Element	Description
String	column	Name of the column in the SELECT clause - i.e., column aliases, if applicable.
String	name	Name of the persistent field or property of the class.

Element Details

name

String name

Name of the persistent field or property of the class.

column

String column

Name of the column in the SELECT clause - i.e., column aliases, if applicable.