42   return new Max(*
this);
 
TE_DEFINE_VISITABLE Max(Expression *arg)
Constructor. 
 
A base class for unary functions. 
 
Max statistical function. 
 
UnaryFunction & operator=(const UnaryFunction &rhs)
 
Max statistical function. 
 
This is an abstract class that models a query expression. 
 
Max & operator=(const Max &rhs)
 
Expression * clone() const 
It creates a new copy of this expression.