Class BiRel

  • All Implemented Interfaces:
    java.lang.Cloneable, RelOptNode, RelNode
    Direct Known Subclasses:
    Correlate, Join, RepeatUnion

    public abstract class BiRel
    extends AbstractRelNode
    Abstract base class for relational expressions with a two inputs.

    It is not required that two-input relational expressions use this class as a base class. However, default implementations of methods make life easier.