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:
请注释说明一下 isAlwaysNullable 的使用规则, 什么情况下是false，什么情况下是true
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