code: func SupportColumnType(ft *types.FieldType) bool {
  	switch ft.Tp {
  	case mysql.TypeTiny, mysql.TypeShort, mysql.TypeInt24, mysql.TypeLong, mysql.TypeLonglong, mysql.TypeFloat,
  		mysql.TypeDouble, mysql.TypeString, mysql.TypeVarString, mysql.TypeVarchar, mysql.TypeBlob, mysql.TypeTinyBlob, mysql.TypeMediumBlob, mysql.TypeLongBlob,
  		mysql.TypeNewDecimal, mysql.TypeDuration, mysql.TypeDate, mysql.TypeDatetime, mysql.TypeTimestamp:
  		return true
  	default:
  		return false
  	}
  }
docs: // SupportColumnType checks if the type of the column can be updated by feedback.