alamb commented on code in PR #15411:
URL: https://github.com/apache/datafusion/pull/15411#discussion_r2012911157


##########
datafusion/datasource-csv/src/file_format.rs:
##########
@@ -642,6 +643,38 @@ impl BatchSerializer for CsvSerializer {
         drop(writer);
         Ok(Bytes::from(buffer))
     }
+
+    async fn deserialize(

Review Comment:
   I wonder how this is related to 
https://docs.rs/datafusion/latest/datafusion/physical_plan/insert/trait.DataSink.html
   
   Specifically, DataSink already has some way to serialize batches -- do we 
need another one?
   
   What is the usecase of this code as it isn't used to implement any built in 
DataFusion features? Maybe we could add an example or something that shows how 
it works



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