Javadoc
Add an assignment to the query plan. Note that this method does not
resolve the IV of the bound variable (which might be bound to a mocked
IV) against the dictionary. Actually, this can be considered a simple,
performance optimized version to translate assignment nodes that can
be used whenever resolving of the IV is not necessary (e.g., because
the IV is filtered away or directly passed to the result).
See addAndResolveAssignment method for an alternative that also resolves
constructed (mocked) IVs against the dictionary.