morrySnow commented on code in PR #33154:
URL: https://github.com/apache/doris/pull/33154#discussion_r1559702530
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/processor/post/CommonSubExpressionOpt.java:
##########
@@ -51,10 +51,12 @@
public class CommonSubExpressionOpt extends PlanPostProcessor {
@Override
public PhysicalProject visitPhysicalProject(PhysicalProject<? extends
Plan> project, CascadesContext ctx) {
-
- List<List<NamedExpression>> multiLayers = computeMultiLayerProjections(
- project.getInputSlots(), project.getProjects());
- project.setMultiLayerProjects(multiLayers);
+ project.child().accept(this, ctx);
+ if (!project.hasPushedDownToProjectionFunctions()) {
Review Comment:
add comments to explain why need this if branch
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