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.