morrySnow commented on code in PR #10240:
URL: https://github.com/apache/doris/pull/10240#discussion_r900261396
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/trees/plans/PlaceHolderPlan.java:
##########
@@ -81,4 +85,34 @@ public PlaceHolderPlan withChildren(List<Plan> children) {
Preconditions.checkArgument(children.size() == 0);
return new PlaceHolderPlan(logicalProperties);
}
+
+ @Override
+ public List<? extends PlanStats> getChildrenStats() {
+ return null;
Review Comment:
I haven't thought about it very carefully, but IMO, throw exception in these
interface in PlaceHolderPlan may be better
##########
fe/fe-core/src/main/java/org/apache/doris/planner/PlanNode.java:
##########
@@ -353,6 +327,11 @@ public List<Expr> getConjuncts() {
return conjuncts;
}
+ @Override
+ public List<? extends PlanStats> getChildrenStats() {
+ return children;
Review Comment:
why return children here? i think this interface should be used to return
children's StatsDeriveResult
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/ExprId.java:
##########
@@ -17,13 +17,15 @@
package org.apache.doris.nereids.trees.expressions;
+import org.apache.doris.common.Id;
+
import java.util.Objects;
import java.util.UUID;
/**
* UUID for Expression in Nereids.
*/
-public class ExprId {
+public class ExprId extends Id<ExprId> {
private final long id;
private final UUID jvmId;
Review Comment:
remove these lines instead with parent class's attribute: id
##########
fe/fe-core/src/main/java/org/apache/doris/statistics/StatsRecursiveDerive.java:
##########
@@ -38,11 +36,11 @@ private static class Inner {
* This parameter is an input and output parameter,
* which will store the derivation result of statistical information in
the corresponding node
*/
- public void statsRecursiveDerive(PlanNode node) throws UserException {
Review Comment:
statsRecursiveDerive's parameter should not change to PlanStats, since
Nereids will never use this to do stats Derive
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