Class QueryIterRoot

  • All Implemented Interfaces:
    java.util.Iterator<Binding>,, 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.