EMPTY collection predicate

To test if a multivalued relationship is empty, use the following syntax

collection-valued-path-expression  IS [NOT]  EMPTY

 

Example: Empty collection predicate

To find all departments with no employees

SELECT OBJECT(d) FROM DeptBean d  WHERE  d.emps IS EMPTY

 

See Also

EJB query language
WHERE clause
Using EJB query

 

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