Ejemplos de Datum.ToString en Golang

Ejemplo n.º 1

Archivo: expr.go Proyecto: Gardenya/cockroach

// Prepare the arguments for a comparison operation. The returned arguments
// will have the same type.
func prepareComparisonArgs(left, right sqlwire.Datum) (opType, sqlwire.Datum, sqlwire.Datum, error) {
	// If both arguments are strings (or string-like), compare as strings.
	if (left.BytesVal != nil || left.StringVal != nil) &&
		(right.BytesVal != nil || right.StringVal != nil) {
		return stringOp, left.ToString(), right.ToString(), nil
	}

	// If both arguments are uints, compare as unsigned.
	if left.UintVal != nil && right.UintVal != nil {
		return uintOp, left, right, nil
	}

	var err error

	// If both arguments are integers (signed or unsigned), compare as integers.
	if (left.BoolVal != nil || left.IntVal != nil || left.UintVal != nil) &&
		(right.BoolVal != nil || right.IntVal != nil || right.UintVal != nil) {
		left, err = left.ToInt()
		if err != nil {
			return intOp, null, null, err
		}
		right, err = right.ToInt()
		if err != nil {
			return intOp, null, null, err
		}
		return intOp, left, right, nil
	}

	// In all other cases, compare as floats.
	left, err = left.ToFloat()
	if err != nil {
		return intOp, null, null, err
	}
	right, err = right.ToFloat()
	if err != nil {
		return intOp, null, null, err
	}
	return floatOp, left, right, nil
}