jakarta.persistence.ColumnResult

Used in conjunction with the SqlResultSetMapping, NamedNativeQuery, or ConstructorResult annotation to map a column of the SELECT list of a SQL query.

The name element references the name of a column in the SELECT list — 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")
     })

See Also:

SqlResultSetMapping

NamedNativeQuery

ConstructorResult

Since:

Jakarta Persistence (JPA) 1.0