TREAT

Use TREAT to cast an object as its subclass value (that is, downcast related entities with inheritance).

Examples

Example 3-14 shows how to use this JPQL extension.

SELECT e FROM Employee JOIN TREAT(e.projects AS LargeProject) p WHERE p.budget > 1000000

See Also

For more information, see:

• "JPQL"
  http://wiki.eclipse.org/EclipseLink/UserGuide/JPA/Basic_JPA_Development/Querying/JPQL