case 1:
			// no comment
		case 2:
			// might be printed form or hex
			note := strings.TrimSpace(parts[1])
			if isHexes(note) {
				hexes = note
			} else {
				printed = note
			}
		case 3:
			// printed form, then hex
			printed = strings.TrimSpace(parts[1])
			hexes = strings.TrimSpace(parts[2])
			if !isHexes(hexes) {
				t.Errorf("%s:%d: malformed hex instruction encoding: %s", input, lineno, line)

	if !isMysql() {
		return false
	}

	var version string
	if err := DB.Raw("SELECT VERSION()").Row().Scan(&version); err != nil {
		return false
	}

	base := strings.SplitN(strings.TrimSpace(version), "-", 2)[0]
	parts := strings.Split(base, ".")
	if len(parts) < 2 {
		return false
	}

	currentMajor, err := strconv.Atoi(parts[0])
	if err != nil {
		return false
	}

func (m Migrator) MigrateColumn(value interface{}, field *schema.Field, columnType gorm.ColumnType) error {
	if field.IgnoreMigration {
		return nil
	}

	// found, smart migrate
	fullDataType := strings.TrimSpace(strings.ToLower(m.DB.Migrator().FullDataTypeOf(field).SQL))
	realDataType := strings.ToLower(columnType.DatabaseTypeName())
	var (
		alterColumn bool
		isSameType  = fullDataType == realDataType
	)