jasperjiaguo commented on code in PR #9236:
URL: https://github.com/apache/pinot/pull/9236#discussion_r953207193
##########
pinot-core/src/main/java/org/apache/pinot/core/query/aggregation/function/CovarianceAggregationFunction.java:
##########
@@ -199,6 +201,9 @@ public Double extractFinalResult(CovarianceTuple
covarianceTuple) {
double sumX = covarianceTuple.getSumX();
double sumY = covarianceTuple.getSumY();
double sumXY = covarianceTuple.getSumXY();
+ if (_isSample) {
+ return (sumXY / (count - 1)) - (sumX / (count - 1)) * (sumY / (count -
1));
Review Comment:
Explicitly use Bessel correction
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