alamb commented on code in PR #2307:
URL: https://github.com/apache/arrow-rs/pull/2307#discussion_r937164448


##########
arrow/src/compute/kernels/take.rs:
##########
@@ -614,23 +614,41 @@ where
     let mut output_buffer = MutableBuffer::new_null(len);
     let output_slice = output_buffer.as_slice_mut();
 
-    indices
-        .iter()
-        .enumerate()
-        .try_for_each::<_, Result<()>>(|(i, index)| {
-            if let Some(index) = index {
-                let index = ToPrimitive::to_usize(&index).ok_or_else(|| {
+    let indices_has_nulls = indices.null_count() > 0;
+
+    if indices_has_nulls {
+        indices
+            .iter()
+            .enumerate()
+            .try_for_each::<_, Result<()>>(|(i, index)| {
+                if let Some(index) = index {
+                    let index = ToPrimitive::to_usize(&index).ok_or_else(|| {

Review Comment:
   Perhaps more rust like:
   
   ```rust
   ToPrimitive::try_to_usize(&index)?
   ```



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