Hi Craig,
assertion A14.6.9-7 specifies:
"A14.6.9-7 [If the returned value from a query specifying a result is
null, this indicates that the expression specified as the result was
null.] Note that the semantics of this result are different from the
returned value where no instances satisfied the filter."
Is my understanding right that the assertion checks if the result
expression evaluates to null? Does it make sense to test 3 queries, one
unique query and two non-unique queries, e.g.:
1) SELECT UNIQUE manager FROM Employee WHERE lastname == 'emp2Last'
expected result: null
2) SELECT manager FROM Employee WHERE lastname == 'emp2Last'
expected result: {null}
3) SELECT DISTINCT manager FROM Employee
expected result: {"emp2", null}
Regards,
Michael
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