lichuang commented on code in PR #9275:
URL: https://github.com/apache/arrow-rs/pull/9275#discussion_r2750444642


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arrow-row/src/list.rs:
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@@ -30,19 +30,30 @@ pub fn compute_lengths<O: OffsetSizeTrait>(
     let offsets = array.value_offsets().windows(2);
     let mut rows_length_iter = rows.lengths();
 
+    // Check if child is Null type - if so, we need special handling

Review Comment:
   Now i introduced a new NULL element codec, which solve the root cause.



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