@Override
  public List<String> getOutputColumnNames() {
    // TODO: CRTODO, complete this method
    throw new NotImplementedException(
        "getOutputColumnNames of AlterLogicalViewNode is not implemented");
  }
A map from target path to source expression. Yht target path is the name of this logical view,
and the source expression is the data source of this view.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/planner/plan/node/metadata/write/view/AlterLogicalViewNode.java