CsvIO limitation of HeaderDecoder and RowDecoder about scio

[RustedBones]

Hi @albertols

You are facing a very well known scala issue with the 22 limit.

Even if the 22 limit has been lifted on case class for a while, most libraries (including scio) only define their API to a maximum 22 parameters.

I fear you'll have to use a custom decoder implementation in this case.

Closing the issue since this is not scio specific.

[albertols]

Thanks for the fast response @RustedBones ,

Maybe the 22 limitation could be included in the comments. I am able to use case classes with more than 22 fields, e.g:

saveAsTypedBigQuery

I will try to give it a go ;) I do not know if https://github.com/tototoshi/scala-csv or similar could dodge the limitation. Maybe, as future enhancement CsvIO could deal with other Decoders/Encoders to avoid this limitation.

Cheers!