javax.persistence

Annotation Type NamedQuery

@Target(value=TYPE)
 @Retention(value=RUNTIME)
public @interface NamedQuery

Specifies a static, named query in the Java Persistence query language. Query names are scoped to the persistence unit. The NamedQuery annotation can be applied to an entity or mapped superclass.

The following is an example of the definition of a named query in the Java Persistence query language:

    @NamedQuery(
            name="findAllCustomersWithName",
            query="SELECT c FROM Customer c WHERE c.name LIKE :custName"
    )
 

The following is an example of the use of a named query:

    @PersistenceContext
    public EntityManager em;
    ...
    customers = em.createNamedQuery("findAllCustomersWithName")
            .setParameter("custName", "Smith")
            .getResultList();
 

Since:

Java Persistence 1.0

Required Element Summary

Required Elements

Modifier and Type	Required Element and Description
java.lang.String	name (Required) The name used to refer to the query with the EntityManager methods that create query objects.
java.lang.String	query (Required) The query string in the Java Persistence query language.

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element and Description
QueryHint[]	hints (Optional) Query properties and hints.
LockModeType	lockMode (Optional) The lock mode type to use in query execution.

Element Detail

name

public abstract java.lang.String name

(Required) The name used to refer to the query with the EntityManager methods that create query objects.

query

public abstract java.lang.String query

(Required) The query string in the Java Persistence query language.

lockMode

public abstract LockModeType lockMode

(Optional) The lock mode type to use in query execution. If a lockMode other than LockModeType.NONE is specified, the query must be executed in a transaction and the persistence context joined to the transaction.

Since:

Java Persistence 2.0

Default:

javax.persistence.LockModeType.NONE

hints

public abstract QueryHint[] hints

(Optional) Query properties and hints. May include vendor-specific query hints.

Default:

{}