StandardSqlDataType
final case class StandardSqlDataType(structType: Option[StandardSqlStructType], arrayElementType: Option[StandardSqlDataType], typeKind: Option["TYPE_KIND_UNSPECIFIED" | "INT64" | "BOOL" | "FLOAT64" | "STRING" | "BYTES" | "TIMESTAMP" | "DATE" | "TIME" | "DATETIME" | "INTERVAL" | "GEOGRAPHY" | "NUMERIC" | "BIGNUMERIC" | "JSON" | "ARRAY" | "STRUCT"])