tustvold commented on code in PR #2586:
URL: https://github.com/apache/arrow-rs/pull/2586#discussion_r954736857


##########
arrow-flight/src/lib.rs:
##########
@@ -254,10 +254,17 @@ impl From<SchemaAsIpc<'_>> for FlightData {
     }
 }
 
-impl From<SchemaAsIpc<'_>> for SchemaResult {
-    fn from(schema_ipc: SchemaAsIpc) -> Self {
-        let IpcMessage(vals) = flight_schema_as_flatbuffer(schema_ipc.0, 
schema_ipc.1);
-        SchemaResult { schema: vals }
+impl TryFrom<SchemaAsIpc<'_>> for SchemaResult {
+    type Error = ArrowError;
+
+    fn try_from(schema_ipc: SchemaAsIpc) -> ArrowResult<Self> {

Review Comment:
   My point is twofold:
   
   * We clearly are missing a test as the change you have made to the protocol 
should be failing a test somewhere
   * We need to update the logic to interpret the `SchemaResult` which does 
exist
   
   _I do really wonder why arrow flight is using opaque byte objects, the whole 
point of using an API DSL is to avoid this but hey ho, this protocol is wild_



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