@Override
  public void beforeStart(FunctionArguments arguments) throws UDFException {
    this.outputDataType = inferOutputDataType(arguments);
  }
Calculate the sum of all arguments. Only support inputs of INT32,INT64,DOUBLE,FLOAT type.
integration-test/src/main/java/org/apache/iotdb/db/query/udf/example/relational/AllSum.java