private PlanFragmentId getNextFragmentId() {
    return this.logicalPlan.getContext().getQueryId().genPlanFragmentId();
  }
Return true if we need to use ShuffleSinkNode instead of IdentitySinkNode.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/planner/distribution/DistributionPlanner.java