private void nextDevice() {
    currentDeviceIndex++;
    this.operatorContext.recordSpecifiedInfo(
        CURRENT_DEVICE_INDEX_STRING, Integer.toString(currentDeviceIndex));
  }
Append a row of aggregation results to the result tsBlock.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/execution/operator/source/relational/AbstractAggTableScanOperator.java