public AggregateFunctionConfig setOutputDataType(Type outputDataType) {
    this.outputDataType = outputDataType;
    return this;
  }
Set the output data type of the scalar function.

@param outputDataType the output data type of the scalar function
@return this
iotdb-api/udf-api/src/main/java/org/apache/iotdb/udf/api/customizer/config/AggregateFunctionConfig.java