avantgardnerio commented on code in PR #2211:
URL: https://github.com/apache/arrow-rs/pull/2211#discussion_r932536712
##########
arrow-flight/src/sql/server.rs:
##########
@@ -47,6 +47,16 @@ pub trait FlightSqlService:
/// When impl FlightSqlService, you can always set FlightService to Self
type FlightService: FlightService;
+ /// Accept authentication and return a token
+ /// <https://arrow.apache.org/docs/format/Flight.html#authentication>
+ async fn do_handshake(
+ &self,
+ request: Request<Streaming<HandshakeRequest>>,
+ ) -> Result<
+ Response<Pin<Box<dyn Stream<Item = Result<HandshakeResponse, Status>>
+ Send>>>,
+ Status,
+ >;
Review Comment:
I'm still learning Rust. Would this be done via `impl specialization`?
https://stackoverflow.com/questions/31461902/is-it-possible-to-extend-a-default-method-implementation-of-a-trait-in-a-struct
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