/// <summary>
/// Read Hits from KustoResponseDataSet response.
/// </summary>
/// <param name="kustoResponseDataSet">KustoResponseDataSet - Kusto parsed response.</param>
/// <param name="query">QueryData containing query information.</param>
/// <returns>IEnumerable.<Hit> - collection of hits.</returns>
public IEnumerable <Hit> ReadHits(KustoResponseDataSet kustoResponseDataSet, QueryData query)
{
Ensure.IsNotNull(kustoResponseDataSet, nameof(kustoResponseDataSet));
if (kustoResponseDataSet[HitsTableName] != null)
{
using var highlighter = new LuceneHighlighter(query, Logger);
return(HitsMapper.MapRowsToHits(kustoResponseDataSet[HitsTableName].TableData.Rows, query, highlighter));
}
return(Enumerable.Empty <Hit>());
}
/// <summary>
/// Report net query execution time from Kusto response.
/// </summary>
/// <param name="kustoResponseDataSet">Kusto Response.</param>
private void ReportQueryExecutionMetrics(KustoResponseDataSet kustoResponseDataSet)
{
var queryStatusTable = kustoResponseDataSet[WellKnownDataSet.QueryCompletionInformation];
Ensure.IsNotNullOrEmpty(queryStatusTable, nameof(queryStatusTable));
var queryStatusRows = queryStatusTable.First().TableData.Rows;
if (queryStatusRows.Count <= 1)
{
throw new ArgumentException("QueryStatus table missing rows.", nameof(kustoResponseDataSet));
}
var statusDescription = queryStatusRows[1]["StatusDescription"];
Ensure.IsNotNull(statusDescription, nameof(statusDescription));
var parsedQueryStatus = JObject.Parse(statusDescription.ToString());
var netQueryExecutionTime = parsedQueryStatus["ExecutionTime"];
Ensure.IsNotNull(netQueryExecutionTime, nameof(netQueryExecutionTime));
var netQueryExecutionTimeValue = (float)netQueryExecutionTime;
metricsHistograms.AdxNetQueryDurationMetric.Observe(netQueryExecutionTimeValue);
Logger.LogDebug("[metric] backend query net (engine) duration: {netQueryExecutionTime}", TimeSpan.FromSeconds(netQueryExecutionTimeValue));
var tableSizeSum = parsedQueryStatus.SelectTokens("dataset_statistics..table_size").Sum(x => x.ToObject <long>());
if (tableSizeSum > 0)
{
metricsHistograms.AdxQueryBytesMetric.Observe(tableSizeSum);
Logger.LogDebug("[metric] backend query bytes: {tableSizeSum}", tableSizeSum);
}
else
{
Logger.LogWarning("Backend query bytes is zero.");
}
}