private void VisitSelectExpression(Expression node)
        {
            var visitor = new SelectExpressionVisitor(_context);

            visitor.Visit(node);
            Columns = visitor.Columns;
        }
 private void VisitSelectExpression(Expression node)
 {
     var visitor = new SelectExpressionVisitor(_context);
     visitor.Visit(node);
     Columns = visitor.Columns;
 }