[GitHub] [arrow] zeroshade commented on a diff in pull request #35674: GH-35359: [C++] FixedSizeListArray.flatten() errors if all elements are null

["zeroshade (via GitHub)" <gi...@apache.org>]

zeroshade commented on code in PR #35674:
URL: https://github.com/apache/arrow/pull/35674#discussion_r1199108357


##########
cpp/src/arrow/array/array_nested.cc:
##########
@@ -177,6 +177,8 @@ Result<std::shared_ptr<Array>> FlattenListArray(const ListArrayT& list_array,
   // Final attempt to avoid invoking Concatenate().
   if (non_null_fragments.size() == 1) {
     return non_null_fragments[0];
+  } else if (non_null_fragments.size() == 0) {
+    return MakeEmptyArray(value_array->type(), memory_pool);

Review Comment:
   Done



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