NOT IN lists are transformed into multiple predicates that use
the <> operator. <> predicates are not optimizable, but they are sargable
(See Internal language transformations).
For example:
orig_airport NOT IN ('ABQ', 'AKL', 'DSM')
becomes
orig_airport <> 'ABQ'
AND orig_airport <> 'AKL'
AND orig_airport <> 'DSM'
In addition, large lists are sorted in ascending order for performance
reasons.
