Method checkHistogramQuery

src/core/TSSubQuery.java:254–278

Make sure the parameters for histogram query are valid. aggregation function: only NONE and SUM supported aggregation function in downsampling: only SUM supported percentile: only in rage (0,100)

()

   * </ul>
   */
  private void checkHistogramQuery() {
    if (!isHistogramQuery()) {
      return;
    }

    // only support NONE and SUM 
    if (agg != null && agg != Aggregators.NONE && agg != Aggregators.SUM) {
      throw new IllegalArgumentException("Only NONE or SUM aggregation function supported for histogram query");
    }
    
    // only support SUM in downsampling
    if (DownsamplingSpecification.NO_DOWNSAMPLER != downsample_specifier && 
        downsample_specifier.getHistogramAggregation() != HistogramAggregation.SUM) {
      throw new IllegalArgumentException("Only SUM downsampling aggregation supported for histogram query");
    }
    
    
    if (null != percentiles && percentiles.size() > 0) {
      for (Float parameter : percentiles) {
        if (parameter < 0 || parameter > 100) {
          throw new IllegalArgumentException("Invalid percentile parameters: " + parameter);
        }
      }
    }
  }
  
  /** @return the parsed aggregation function */
  public Aggregator aggregator() {