public void HeavySubAggregating()
{
var histogramAggregate = new DateHistogramAggregate("@timestamp", "1d");
var histogramSubAggregate = new SubAggregate(histogramAggregate);
var totalSoldCarsAggregate = new ValueCountAggregate("TotalSoldCars");
var countryTermsAggregate = new TermsAggregate("Country");
var countrySubAggregate = new SubAggregate(countryTermsAggregate);
countrySubAggregate.Aggregates.Add("TotalSoldCars", totalSoldCarsAggregate);
var carTypeTermsAggregate = new TermsAggregate("Type");
var carTypeSubAggregate = new SubAggregate(carTypeTermsAggregate);
carTypeSubAggregate.Aggregates.Add("TotalSoldCarsOfType", totalSoldCarsAggregate);
histogramSubAggregate.Aggregates.Add("CountrySubAggr", countrySubAggregate);
countrySubAggregate.Aggregates.Add("CarTypeSubAggr", carTypeSubAggregate);
QueryBuilder.Aggregates.Add("HistogramSubAggr", histogramSubAggregate);
QueryBuilder.PrintQuery();
AggregateResult result = Client.ExecuteAggregate(QueryBuilder);
result.PrintResult();
}
private static Dictionary <string, long?> RetrieveAggregationElements(TermsAggregate <string> termsAggregate, bool useKeyAsString = false)
{
var aggregationResult = new Dictionary <string, long?>();
string keySelector(KeyedBucket <string> b) => useKeyAsString ? b.KeyAsString : b.Key;
if (termsAggregate.Buckets != null)
{
foreach (var item in termsAggregate.Buckets)
{
aggregationResult.Add(keySelector(item), item.DocCount);
}
}
return(aggregationResult);
}