Hi Zimo, I don't think anybody is actively working on it. One of the challenges would be how to represent a Union type in Parquet because to the best of my knowledge parquet doesn't support this type.
So if this is something you would like to contribute, proposing a mapping to and from the Parquet type system would be a good place to start. If you were to contribute this most of the code would be self-contained to the directory you linked. Cheers, Micah On Fri, Apr 23, 2021 at 9:01 PM Zmoey Zhang <zzm...@gmail.com> wrote: > Hi there, > > Dense union type is not supported yet in Parquet > > https://github.com/apache/arrow/blob/8e43f23dcc6a9e630516228f110c48b64d13cec6/cpp/src/parquet/arrow/schema.cc#L382 > . > > Is it planned to support it nearly? > > And if I'd implement this myself, is there any other codes to take care of? > > Thanks, > Zimo Zhang >
