EMPTY collection predicate

 

You can use the EMPTY collection predicate to test if a multivalued relationship has no members. 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

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Related concepts

EJB query language
WHERE clause

 

Related tasks

Use EJB query