@Override
  public List<String> getOutputColumnNames() {
    // TODO: CRTODO, complete this method
    throw new NotImplementedException(
        "getOutputColumnNames of CreateMultiTimeSeriesNode is not implemented");
  }
This variable will be set in function splitByPartition() according to analysis. And it will be
set when creating new split nodes.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/planner/plan/node/metadata/write/view/CreateLogicalViewNode.java