alamb commented on issue #10002:
URL: 
https://github.com/apache/arrow-datafusion/issues/10002#issuecomment-2064879933

   > I have the question about this, how to serialize and deserialize the other 
language logical plan/expr to datafusion?
   
   I @liukun4515  -- the logical plan serialization / deserialization handles 
`ScalarUDF` and other user defined functions as before.
   
   So for example, here is an example of how functions are serialized: 
   
   
https://github.com/apache/arrow-datafusion/blob/92318c808666695fb5c2f358083f1cb13158dca9/datafusion/proto/tests/cases/roundtrip_logical_plan.rs#L1867-L1892


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