jayzhan211 commented on code in PR #12640:
URL: https://github.com/apache/datafusion/pull/12640#discussion_r1778034315


##########
datafusion/physical-plan/src/aggregates/row_hash.rs:
##########
@@ -1004,9 +1004,13 @@ impl GroupedHashAggregateStream {
     /// Updates skip aggregation probe state.
     fn update_skip_aggregation_probe(&mut self, input_rows: usize) {
         if let Some(probe) = self.skip_aggregation_probe.as_mut() {
-            // Skip aggregation probe is not supported if stream has any 
spills,
-            // currently spilling is not supported for Partial aggregation
-            assert!(self.spill_state.spills.is_empty());
+            // Skip aggregation probe is only supported in Partial aggregation.
+            // And it is not supported if stream has any spills even in 
Partial aggregation.
+            // Although currently spilling is actually not supported in 
Partial aggregation,
+            // it is possible to be supported in future, so we also add an 
assertion for it.
+            assert!(
+                self.mode == AggregateMode::Partial && 
self.spill_state.spills.is_empty()

Review Comment:
   It looks good to me, and also we could do the same for other partial mode 
only like `switch_to_skip_aggregation`, `should_skip_aggregation` and 
`emit_early_if_necessary`



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