func (m *Max) Resolved() bool {
	return m.Child.Resolved()
}
Resolved implements the Resolvable interface.
package aggregation
import (
	"fmt"
	"reflect"
	"github.com/src-d/go-mysql-server/sql"
	"github.com/src-d/go-mysql-server/sql/expression"
)
type Max struct {
	expression.UnaryExpression
}
func NewMax(e sql.Expression) *Max {
	return &Max{expression.UnaryExpression{Child: e}}
}