arrow 
DuckDB: Importing Polars dataframes the easy and hard way using Rust
Recently I have been working on a project where I did data manipulation through Polars Dataframes and then wanted to query the result with DuckDB for that OLAP goodness. I wanted to build on the Rust Arrow ecosystem. On the surface, Arrow looks like a nice ecosystem with good interoperability. Polars abstracts over Arrow. DuckDB advertises support for both Polars and Arrow. That turned out to be a mirage.