Hi,
I'd like to be able to override the schema type set for one or more numeric columns before the parquet file is written because the inferred schema types seem to always choose large types (such as Int64 or Float64) when smaller types (Uint16 or Float32) would suffice for my data sets.
I've had a go at a putting something together, it seems to work (though I am very much a beginner rust dev!).
If you'd like to take a look, the code is in this fork.
Cheers, Andy