There are contributors and committers in the Arrow project working to resolve this. We recently removed specialization from the core Arrow crate and we plan on doing the same for the Parquet crate.
Yes, thanks a million for doing that! I've read the 'despecialization' of arrow-rust PR which actually seemed to end up being quite simple (but it's a breaking change, so a 3.0 candidate?)
Hope that something similar can be done in parquet so that arrow-parquet-df can all compile on stable in 3.0, that would unlock it for many potential users.
Hope that something similar can be done in parquet so that arrow-parquet-df can all compile on stable in 3.0, that would unlock it for many potential users.