nevi-me commented on issue #2644:
URL: 
https://github.com/apache/arrow-datafusion/issues/2644#issuecomment-1142467001

   I have a commit which makes `provider_as_source` part of `TableProvider` 
[https://github.com/apache/arrow-datafusion/commit/7b73e0d3d3f587cbba10b6e9e5e07472741bf84a]
   
   ```rust
   trait TableProvider {
      fn as_source(self: Arc<Self>) -> Arc<dyn TableSource>;
   }
   ```
   
   This would solve one half of my problem, as I could create a 
`SqlTableSource` that also has the connection details that I need.
   
   The part that's not straightforward is the corresponding 
`TableSource::as_provider()`, as it creates a circular dependency between the 
crates. 


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