eldenmoon commented on code in PR #55817:
URL: https://github.com/apache/doris/pull/55817#discussion_r2332854340


##########
be/src/olap/rowset/segment_v2/variant/variant_column_reader.cpp:
##########
@@ -225,6 +225,11 @@ Status 
VariantColumnReader::_new_iterator_with_flat_leaves(ColumnIteratorUPtr* i
             target_col.has_path_info() ? 
_subcolumns_meta_info->find_leaf(relative_path) : nullptr;
     if (!node) {
         if (relative_path.get_path() == SPARSE_COLUMN_PATH) {
+            if (_sparse_column_reader == nullptr) {
+                return Status::InternalError(
+                        "Sparse column reader is not initialize, variant 
column is: {}",
+                        target_col.path_info_ptr()->get_path());

Review Comment:
   看下能不能打印tablet id



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