@Override
  public long getMinTime() {
    return insertRowNodeList.stream()
        .map(InsertRowNode::getMinTime)
        .reduce(Long::min)
        .orElse(Long.MAX_VALUE);
  }
Record the result of insert rows
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/planner/plan/node/write/InsertRowsNode.java