@Override
  public boolean isEmpty() {
    return rowCount == 0
        || times.length == 0
        || measurements.length == 0
        || dataTypes.length == 0
        || columns.length == 0;
  }
This param record whether the source of logical view is aligned. Only used when there are
views.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/statement/crud/InsertTabletStatement.java