Java Persistence API (JPA) Extensions Reference for EclipseLink, Release 2.4
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Use TREAT to cast an object as its subclass value (that is, downcast related entities with inheritance).


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

Example 3-14 Using TREAT EQL

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

See Also

For more information, see: