Package org.apache.qpid.server.query.engine.parsing.expression.set

Interface Summary

Interface	Description
SetExpression<T,R>	Parent of select expression and set operations expressions

Class Summary

Class	Description
AbstractSetExpression<T,R>	Abstract class containing base functionality for set expressions
EmptySetExpression<T,R>	Represents an empty set returned by a subquery
IntersectExpression<T>	Set INTERSECT expression is used to retain the results of right SELECT statement present in the results of left SELECT statement.
MinusExpression<T>	Set MINUS expression is used to remove the results of right SELECT statement from the results of left SELECT statement.
UnionExpression<T>	Set UNION expression is used to combine the results of two or more SELECT statements.