felipecrv commented on code in PR #36740:
URL: https://github.com/apache/arrow/pull/36740#discussion_r1266865927


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cpp/src/arrow/compute/kernels/ree_util_internal.cc:
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@@ -60,6 +60,7 @@ Result<std::shared_ptr<ArrayData>> PreallocateRunEndsArray(
 Result<std::shared_ptr<ArrayData>> PreallocateValuesArray(
     const std::shared_ptr<DataType>& value_type, bool has_validity_buffer, 
int64_t length,
     int64_t null_count, MemoryPool* pool, int64_t data_buffer_size) {
+  DCHECK(!has_validity_buffer || null_count != 0);

Review Comment:
   The more I think of it, I realize I can remove the `has_validity_buffer` 
parameter and infer it completely from the `null_count`.



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