case time.Time:
		return "TIMESTAMP"
	case []byte:
		return "BYTES"
	case []Value:
		return "ARRAY"
	case Missing:
		return "MISSING"
	}
	return "--"
}

// Repr returns a string representation of value.
func (v Value) Repr() string {
	switch x := v.value.(type) {
	case nil:
		return ":NULL"
	case bool, int64, float64:
		return fmt.Sprintf("%v:%s", v.value, v.GetTypeString())
	case time.Time: