Class SetOperatorNode

  • All Implemented Interfaces:
    Optimizable, Visitable
    Direct Known Subclasses:
    IntersectOrExceptNode, UnionNode

    abstract class SetOperatorNode
    extends TableOperatorNode
    A SetOperatorNode represents a UNION, INTERSECT, or EXCEPT in a DML statement. Binding and optimization preprocessing is the same for all of these operations, so they share bind methods in this abstract class. The class contains a boolean telling whether the operation should eliminate duplicate rows.