rluvaton commented on code in PR #15022:
URL: https://github.com/apache/datafusion/pull/15022#discussion_r2049436982


##########
datafusion/functions-aggregate-common/src/aggregate/groups_accumulator.rs:
##########
@@ -163,6 +177,50 @@ impl GroupsAccumulatorAdapter {
 
     /// invokes f(accumulator, values) for each group that has values
     /// in group_indices.
+    fn invoke_per_accumulator<F>(
+        &mut self,
+        values: &[ArrayRef],
+        group_indices: &[usize],
+        opt_filter: Option<&BooleanArray>,
+        total_num_groups: usize,
+        f: &F,
+    ) -> Result<()>
+    where
+        F: Fn(&mut dyn Accumulator, &[ArrayRef]) -> Result<()>,
+    {
+        self.make_accumulators_if_needed(total_num_groups)?;
+
+        assert_eq!(values[0].len(), group_indices.len());
+
+        if group_indices.is_empty() {
+            return Ok(());
+        }
+
+        let (sizes_pre, sizes_post) = if self.contiguous_group_indices {
+            self.invoke_per_accumulator_on_contiguous_group_indices(
+                values,
+                group_indices,
+                opt_filter,
+                f,
+            )
+        } else {
+            self.invoke_per_accumulator_on_non_ordered_group_indices(
+                values,
+                group_indices,
+                opt_filter,
+                f,
+            )
+        }?;
+
+        self.adjust_allocation(sizes_pre, sizes_post);
+
+        Ok(())
+    }
+
+    /// invokes f(accumulator, values) for each group that has values
+    /// in group_indices.
+    ///
+    /// if the group indices are contiguous we avoiding

Review Comment:
   yes. sorry, somethings I just move to different things while forgot to 
finish 😅  will update



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