Add delta lake file support

[the-destro]

Python Polars has support for delta lake files already though I can't find the function exposed in the rust package.

[josevalim]

Can you please link to the Python version of the function?

[watsy0007]

@the-destro
https://pola-rs.github.io/polars/py-polars/html/reference/io.html#delta-lake
Is scan_delta, read_delta and DataFrame.write_delta() these 3 functions ?

https://github.com/pola-rs/polars/blob/40d3e0818408d836abf6c31146a3f69fd628f0fb/py-polars/polars/io/delta.py#L295

Make sure to install deltalake>=0.8.0. Read the documentation
here <https://delta-io.github.io/delta-rs/python/installation.html>_.

The rust package repository is https://github.com/delta-io/delta-rs

[josevalim]

Btw, isn't delta-lake storage pretty much Parquet files? Could you access them directly instead? Writing them would be a bit more complicated though.

[watsy0007]

Btw, isn't delta-lake storage pretty much Parquet files? Could you access them directly instead? Writing them would be a bit more complicated though.

Yes, that's correct. In our company, we integrate DuckDB, dbt, and Delta Lake with Python for business operations. I'm currently considering replacing some of these components with Elixir.