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