Class QueryIterRoot

All Implemented Interfaces:
Iterator<Binding>, org.apache.jena.atlas.io.Printable, org.apache.jena.atlas.lib.Closeable, QueryIterator, PrintSerializable

public class QueryIterRoot extends QueryIterYieldN
The root binding is one-row, usually no columns making it the join identity. It has columns only for an initial binding. It is useful to be able to spot it before having to activate a QueryIterator. Executing with a pre-set binding does not use QueryIterRoot.