englefly commented on code in PR #12987:
URL: https://github.com/apache/doris/pull/12987#discussion_r990585141
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fe/fe-core/src/main/java/org/apache/doris/nereids/stats/StatsCalculator.java:
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@@ -320,17 +323,17 @@ private StatsDeriveResult computeAggregate(Aggregate
aggregate) {
// .map(childSlotToColumnStats::get)
// .map(ColumnStats::getNdv)
// .reduce(1L, (a, b) -> a * b);
- long resultSetCount = childStats.getRowCount() /
DEFAULT_AGGREGATE_RATIO;
+ long resultSetCount = (long) childStats.getRowCount() /
DEFAULT_AGGREGATE_RATIO;
Review Comment:
how about define rowCount as double? Since it always multiplies
selectivity(Double) frequently
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