[opt](nereids) refine operator estimation

xzj7019 · Sep 13, 2024 · 1d2fbd5 · 1d2fbd5
1 parent 3a61c2b
commit 1d2fbd5
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/stats/FilterEstimation.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/stats/FilterEstimation.java
@@ -547,8 +547,8 @@ public Statistics visitIsNull(IsNull isNull, EstimationContext context) {
             Expression child = isNull.child();
             Statistics childStats = child.accept(this, context);
             outputRowCount = Math.max(childStats.getRowCount() * DEFAULT_ISNULL_SELECTIVITY, outputRowCount);
+            outputRowCount = Math.max(outputRowCount, 1);
         }
-        outputRowCount = Math.max(outputRowCount, 1);
 
         ColumnStatisticBuilder colBuilder = new ColumnStatisticBuilder(childColStats);
         colBuilder.setCount(outputRowCount).setNumNulls(outputRowCount)