Function getRuntimeFilterId

src/Processors/QueryPlan/QueryPlanFormat.cpp:228–235

        }

        String getRuntimeFilterId(const ActionsDAG::Node * node)
        {
            /// The first `__applyFilter` argument is a const whose DAG result NAME is the stable
            /// structural id (`_runtime_filter_<hash>`), under which `runtime_filter_names` is keyed
            /// (`BuildRuntimeFilterStep::getFilterName`). Its VALUE is the volatile per-plan-build
            /// rendezvous key, which must never surface in EXPLAIN — so key on the result name.
            return node->children[0]->result_name;
        }

        String formatSetPretty(
            const ActionsDAG::Node * set_node,