/// <summary>
/// Merges the given CardinalityEstimator instances and returns the result
/// </summary>
/// <param name="estimators">Instances of CardinalityEstimator</param>
/// <returns>The merged CardinalityEstimator</returns>
public static CardinalityEstimator Merge(IList <CardinalityEstimator> estimators)
{
if (!estimators.Any())
{
throw new ArgumentException(string.Format("Was asked to merge 0 instances of {0}", typeof(CardinalityEstimator)),
"estimators");
}
var ans = new CardinalityEstimator(estimators[0].bitsPerIndex);
foreach (CardinalityEstimator estimator in estimators)
{
ans.Merge(estimator);
}
return(ans);
}
/// <summary>
/// Merges the given CardinalityEstimator instances and returns the result
/// </summary>
/// <param name="estimators">Instances of CardinalityEstimator</param>
/// <returns>The merged CardinalityEstimator</returns>
public static CardinalityEstimator Merge(IList <CardinalityEstimator> estimators)
{
if (!estimators.Any())
{
throw new ArgumentException($"Was asked to merge 0 instances of {typeof(CardinalityEstimator)}",
nameof(estimators));
}
var ans = new CardinalityEstimator(estimators[0]._bitsPerIndex);
foreach (CardinalityEstimator estimator in estimators)
{
ans.Merge(estimator);
}
return(ans);
}
