public static boolean isBuiltinAggregationName(String functionName) {
    return BuiltinAggregationFunction.getNativeFunctionNames().contains(functionName);
  }
return whether the tsBlock contains the data of the current time window.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/execution/operator/AggregationUtil.java