How should the following UDF be invoked in order to convert US currency values stored in the
EXPENSES table into Canadian currency?
CREATE FUNCTION getratews11 (
country1 VARCHAR(100),
country2 VARCHAR(100) )
RETURNS DOUBLE
LANGUAGE SQL
CONTAINS SQL
EXTERNAL ACTION NOT DETERMINISTIC
BEGIN
…
END

A.
CALLgetratews11(‘USA’,’CANADA’)

B.
CALLexpenses.getratews11(‘USA’,’CANADA’)

C.
SELECTgetratews11(‘USA’,’CANADA’) FROM expenses

D.
SELECT * FROMTABLE(getratews11(‘USA’,’CANADA’)) AS convert_currency