; columns->columns- >children.emplace_back(create_materialized_column_declaration(“_sign”, "Int8", UInt64(1))); columns->columns- >children.emplace_back(create_materialized_column_declaration(“_version” sign_column_data.emplace_back(1); version_column_data.emplace_back(version); } else { sign_column_data.emplace_back(-1); sign_column_data.emplace_back(1); version_column_data.emplace_back(version); version_column_data.emplace_back(version); } } Consume