XieJiann commented on code in PR #29184:
URL: https://github.com/apache/doris/pull/29184#discussion_r1438116171
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fe/fe-core/src/main/java/org/apache/doris/nereids/stats/FilterEstimation.java:
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@@ -222,9 +221,12 @@ private Statistics estimateEqualTo(ComparisonPredicate cp,
ColumnStatistic stats
double val = statsForRight.maxValue;
if (val > statsForLeft.maxValue || val < statsForLeft.minValue) {
selectivity = 0.0;
+ } else if (statsForRight.isUnKnown) {
+ selectivity = 0.0;
Review Comment:
right is a literal, why it could be unknow
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