morrySnow commented on code in PR #10891:
URL: https://github.com/apache/doris/pull/10891#discussion_r922140493
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/memo/Memo.java:
##########
@@ -82,13 +83,15 @@ public GroupExpression copyIn(Plan node, @Nullable Group
target, boolean rewrite
} else if (child.getGroupExpression().isPresent()) {
childrenGroups.add(child.getGroupExpression().get().getParent());
} else {
- childrenGroups.add(copyIn(child, null, rewrite).getParent());
+ childrenGroups.add(copyIn(child, null,
rewrite).second.getParent());
}
}
node = replaceChildrenToGroupPlan(node, childrenGroups);
GroupExpression newGroupExpression = new GroupExpression(node);
newGroupExpression.setChildren(childrenGroups);
- return insertOrRewriteGroupExpression(newGroupExpression, target,
rewrite, node.getLogicalProperties());
+ newGroupExpression =
insertOrRewriteGroupExpression(newGroupExpression, target, rewrite,
Review Comment:
insertOrRewriteGroupExpression could also return exist group expression
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/jobs/cascades/ApplyRuleJob.java:
##########
@@ -63,7 +63,7 @@ public void execute() throws AnalysisException {
List<Plan> newPlans = rule.transform(plan,
context.getPlannerContext());
for (Plan newPlan : newPlans) {
GroupExpression newGroupExpression =
context.getPlannerContext().getMemo()
- .copyIn(newPlan, groupExpression.getParent(),
rule.isRewrite());
+ .copyIn(newPlan, groupExpression.getParent(),
rule.isRewrite()).second;
Review Comment:
when we return a exist group expression, maybe we could just return
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