public static IEnumerable <Histogram> FromQueryRows(IEnumerable <SingleColumnHistogram.Result> queryResults) =>
from row in queryResults
where row.HasValue
group row by row.BucketSize into bucketGroup
let bucketSize = new BucketSize(bucketGroup.Key)
select new Histogram(
bucketSize,
bucketGroup.Select(b =>
new HistogramBucket(
(decimal)b.LowerBound,
bucketSize,
NoisyCount.FromCountableRow(b))));
internal HistogramBucket(decimal lowerBound, BucketSize bucketSize, NoisyCount noisyCount)
{
LowerBound = lowerBound;
BucketSize = bucketSize;
this.noisyCount = noisyCount;
}