@Override
  public String toString() {
    return String.format(
        "SeriesScanNode-%s:[SeriesPath: %s, DataRegion: %s]",
        this.getPlanNodeId(),
        this.getSeriesPath(),
        PlanNodeUtil.printRegionReplicaSet(getRegionReplicaSet()));
  }
SeriesScanNode is responsible for read data a specific series. When reading data, the
SeriesScanNode can read the raw data batch by batch. And also, it can leverage the filter and
other info to decrease the result set.

<p>Children type: no child is allowed for SeriesScanNode
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/planner/plan/node/source/SeriesScanNode.java