[GitHub] [arrow-datafusion] alamb commented on a diff in pull request #2186: make nightly clippy happy

[GitBox <gi...@apache.org>]

alamb commented on code in PR #2186:
URL: https://github.com/apache/arrow-datafusion/pull/2186#discussion_r846767435


##########
ballista/rust/scheduler/src/state/persistent_state.rs:
##########
@@ -124,28 +124,33 @@ impl<T: 'static + AsLogicalPlan, U: 'static + AsExecutionPlan>
             .get_from_prefix(&get_stage_prefix(&self.namespace))
             .await?;
 
+        let mut tmp_stages: HashMap<StageKey, Arc<dyn ExecutionPlan>> = HashMap::new();

Review Comment:
   This makes sense to me (make the snapshot while not holding the lock) but I am not familiar enough with the ballista codebase to know if it would cause problems. Perhaps @mingmwang @yahoNanJing  or @thinkharderdev  could review it too?



##########
datafusion/physical-expr/src/expressions/lead_lag.rs:
##########
@@ -151,11 +151,11 @@ fn shift_with_default_value(
         create_empty_array(value, array.data_type(), array.len())
     } else {
         let slice_offset = (-offset).clamp(0, value_len) as usize;
-        let length = array.len() - offset.abs() as usize;
+        let length = array.len() - offset.unsigned_abs() as usize;

Review Comment:
   looking at this code I wonder if we need to check for `offset < 0` -- however, this PR seems like a definite improvement so 👍 



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