comphead commented on code in PR #13203:
URL: https://github.com/apache/datafusion/pull/13203#discussion_r1826268943


##########
datafusion/physical-plan/src/joins/cross_join.rs:
##########
@@ -51,7 +51,7 @@ type JoinLeftData = (RecordBatch, MemoryReservation);
 
 /// executes partitions in parallel and combines them into a set of
 /// partitions by combining all values from the left with all values on the 
right
-#[derive(Debug)]
+#[derive(Debug)] // note not Clone because of the OnceAsync

Review Comment:
   ```suggestion
   /// Clone trait not derived because the structure used with `OnceAsync` 
which doesn't expect the structure to be cloned
   #[derive(Debug)]
   ```



##########
datafusion/physical-plan/src/joins/cross_join.rs:
##########
@@ -51,7 +51,7 @@ type JoinLeftData = (RecordBatch, MemoryReservation);
 
 /// executes partitions in parallel and combines them into a set of
 /// partitions by combining all values from the left with all values on the 
right
-#[derive(Debug)]
+#[derive(Debug)] // note not Clone because of the OnceAsync

Review Comment:
   perhaps something like that? 



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