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