[GitHub] [arrow] jorisvandenbossche commented on a diff in pull request #14326: ARROW-14596: [C++][Python] Read table nested fields in columns

[GitBox <gi...@apache.org>]

jorisvandenbossche commented on code in PR #14326:
URL: https://github.com/apache/arrow/pull/14326#discussion_r988670499


##########
cpp/src/arrow/compute/kernels/scalar_nested.cc:
##########
@@ -242,6 +245,20 @@ struct StructFieldFunctor {
                                 union_array.GetFlattenedField(index, ctx->memory_pool()));
           break;
         }
+        case Type::LIST: {
+          const auto& list_array = checked_cast<const ListArray&>(*current);
+          ARROW_LOG(INFO) << list_array.ToString();
+          ARROW_ASSIGN_OR_RAISE(
+              Datum indices,
+              CallFunction("add", {list_array.offsets()->Slice(
+                                       0, list_array.offsets()->length() - 1),
+                                   MakeScalar(index)}));
+          ARROW_ASSIGN_OR_RAISE(Datum result, CallFunction("take", {list_array.values(),

Review Comment:
   What this is doing is probably the `list_element` kernel ? (defined just above)



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