englefly commented on code in PR #34519:
URL: https://github.com/apache/doris/pull/34519#discussion_r1596171447
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fe/fe-core/src/main/java/org/apache/doris/nereids/stats/FilterEstimation.java:
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@@ -63,9 +63,8 @@ public class FilterEstimation extends
ExpressionVisitor<Statistics, EstimationCo
public static final double DEFAULT_HAVING_COEFFICIENT = 0.01;
- public static final double DEFAULT_EQUALITY_COMPARISON_SELECTIVITY = 0.1;
public static final double DEFAULT_LIKE_COMPARISON_SELECTIVITY = 0.2;
- public static final double DEFAULT_ISNULL_SELECTIVITY = 0.001;
+ public static final double DEFAULT_ISNULL_SELECTIVITY = 0.005;
Review Comment:
not (A is null) selectivity is : 1 - 0.005
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