@Override
  public void setSchema(IMeasurementSchema schema) {
    if (schema.isLogicalView()) {
      this.schema = (LogicalViewSchema) schema;
    }
  }
@return return the path of alias series if this view is alias series; else return null.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/schemaengine/schemaregion/mtree/impl/mem/mnode/info/LogicalViewInfo.java