[GitHub] [doris] englefly commented on a diff in pull request #14964: [Fix](Nereids)fix aggregation result error when child is empty relation

[GitBox <gi...@apache.org>]

englefly commented on code in PR #14964:
URL: https://github.com/apache/doris/pull/14964#discussion_r1059647567


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fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/agg/Avg.java:
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@@ -64,13 +67,18 @@ protected List<DataType> intermediateTypes() {
     @Override
     public AggregateFunction withDistinctAndChildren(boolean isDistinct, List<Expression> children) {
         Preconditions.checkArgument(children.size() == 1);
-        return new Avg(isDistinct, children.get(0));
+        return new Avg(isDistinct, isAlwaysNullable, children.get(0));

Review Comment:
   什么情况下 isAlwaysNullable=false？



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