GitHub user not-my-profile closed a discussion: How to read a JSON or CSV 
document from memory?

The format-specific `read_` methods form 
[SessionContext](https://docs.rs/datafusion/27.0.0/datafusion/execution/context/struct.SessionContext.html)
 only accept paths, so I am wondering how you can instead provide something 
that implements 
[std::io::Read](https://doc.rust-lang.org/stable/std/io/trait.Read.html).

Apparently back in 5.0.0 there were some [`try_new_from_reader` 
methods](https://docs.rs/datafusion/5.0.0/datafusion/index.html?search=try_new_from_reader)
 but they have been removed and I am struggling to figure out how to do the 
same with the new API.

GitHub link: https://github.com/apache/datafusion/discussions/6963

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