FROM
clause to that property.FROM
clause of the SELECT
statement. The following identifiers except the last one should have object references as return values. The last identifier may return any supported datatype. For example:null
then the complete path expression will return null
.WHERE
and ORDER BY
clauses:Employee
objects, while the below query returns references to the Employee
objects themselves.Father
is of type Person
and Person
has no Manager
property:Father
to type Employee
then you can continue the path expression with Manager
:Father
for some objects in the extent Person
is not of type, or subtype of Employee
, then this object reference can't be cast to Employee
and the operation returns null
.