gabotechs commented on PR #23842:
URL: https://github.com/apache/datafusion/pull/23842#issuecomment-5074153881

   > No, the issue is that only string key/value pairs can make it through FFI 
configs. I'm going to investigate to see if the python branch I have for 
datafusion-distributed can pass the internal config around in a different way 
other than getting them out of the session's config.
   
   Why would those configs need to cross any FFI boundary? I'd imagine that in 
the Python API, we would build something like a 
`DistributedSessionContext.new()` that can be enriched with all the extensions, 
and planning + execution would happen under that `DistributedSessionContext` 
scope, where those extensions are automatically available, without crossing any 
FFI boundary.


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