This package defines the iterator objects that are used to evaluate queries in NetTraveler.

Iterator objects implement the functionality of one or more SQL operators. A physical query plan consists of a group of such SQL operators.

All {@link edu.uprm.admg.nettraveler.plans.Plan} objects in NetTraveler are executed by converting them into a set of Iterator objects.

Operations supported by an Iterator are defined in the {@link edu.uprm.admg.nettraveler.iterators.Iterator} interface. This interface is implemented by all iterators.