eldenmoon commented on code in PR #28673:
URL: https://github.com/apache/doris/pull/28673#discussion_r1462873247


##########
be/src/vec/columns/column_object.cpp:
##########
@@ -1196,6 +1197,18 @@ void ColumnObject::finalize(bool ignore_sparse) {
         if (!ignore_sparse && (entry->data.check_if_sparse_column(num_rows))) {
             // TODO seperate ambiguous path
             sparse_columns.add(entry->path, entry->data);
+            if (sparse_subcolumns_schema != nullptr) {
+                const std::string& column_name = entry->path.get_path();
+                const vectorized::DataTypePtr& final_data_type_from_object =
+                        entry->data.get_least_common_type();
+                vectorized::PathInDataBuilder full_path_builder;
+                auto full_path = 
full_path_builder.append(entry->path.get_parts(), false).build();
+                TabletColumn tablet_column = 
vectorized::schema_util::get_column_by_type(
+                        final_data_type_from_object, column_name,
+                        vectorized::schema_util::ExtraInfo {
+                                .unique_id = -1, .parent_unique_id = -1, 
.path_info = full_path});
+                
sparse_subcolumns_schema->emplace_back(std::move(tablet_column));

Review Comment:
   refactored



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