diff --git a/src/graph/optimizer/Optimizer.cpp b/src/graph/optimizer/Optimizer.cpp
index 3dfee9a598f..de570d6bac6 100644
--- a/src/graph/optimizer/Optimizer.cpp
+++ b/src/graph/optimizer/Optimizer.cpp
@@ -35,11 +35,6 @@ StatusOr<const PlanNode *> Optimizer::findBestPlan(QueryContext *qctx) {
   auto root = qctx->plan()->root();
   auto spaceID = qctx->rctx()->session()->space().id;
 
-  // auto status = preprocess(root, qctx, spaceID);
-  // if (!status.ok()) {
-  //   LOG(ERROR) << "Failed to preprocess plan: " << status;
-  // }
-
   auto ret = prepare(optCtx.get(), root);
   NG_RETURN_IF_ERROR(ret);
   auto rootGroup = std::move(ret).value();
@@ -54,11 +49,6 @@ StatusOr<const PlanNode *> Optimizer::findBestPlan(QueryContext *qctx) {
   return newRoot;
 }
 
-// Status Optimizer::preprocess(PlanNode *root, graph::QueryContext *qctx, GraphSpaceID spaceID) {
-//   ColumnTracker colsUsed;
-//   return root->pruneCulumns(colsUsed, qctx, spaceID);
-// }
-
 Status Optimizer::postprocess(PlanNode *root, graph::QueryContext *qctx, GraphSpaceID spaceID) {
   if (FLAGS_enable_optimizer_property_pruner_rule) {
     graph::PropertyTracker propsUsed;
diff --git a/src/graph/planner/plan/PlanNode.h b/src/graph/planner/plan/PlanNode.h
index d4bea302938..35e19b70b87 100644
--- a/src/graph/planner/plan/PlanNode.h
+++ b/src/graph/planner/plan/PlanNode.h
@@ -193,6 +193,10 @@ class PlanNode {
 
   virtual void accept(PlanNodeVisitor* visitor);
 
+  void markDeleted() {
+    deleted_ = true;
+  }
+
   virtual PlanNode* clone() const = 0;
 
   virtual void calcCost();
@@ -315,6 +319,7 @@ class PlanNode {
   std::vector<const PlanNode*> dependencies_;
   std::vector<Variable*> inputVars_;
   std::vector<Variable*> outputVars_;
+  bool deleted_{false};
 };
 
 std::ostream& operator<<(std::ostream& os, PlanNode::Kind kind);
diff --git a/src/graph/visitor/PrunePropertiesVisitor.cpp b/src/graph/visitor/PrunePropertiesVisitor.cpp
index e02c4e81f5c..6207b107c22 100644
--- a/src/graph/visitor/PrunePropertiesVisitor.cpp
+++ b/src/graph/visitor/PrunePropertiesVisitor.cpp
@@ -193,6 +193,7 @@ void PrunePropertiesVisitor::visit(Traverse *node) {
   status_ = depsPruneProperties(node->dependencies());
 }
 
+// AppendVertices should be deleted when no properties it pulls are used by the parent node.
 void PrunePropertiesVisitor::visit(AppendVertices *node) {
   auto &colNames = node->colNames();
   DCHECK(!colNames.empty());
@@ -215,8 +216,9 @@ void PrunePropertiesVisitor::visit(AppendVertices *node) {
     if (it2 != propsUsed_.vertexPropsMap.end()) {
       auto &usedVertexProps = it2->second;
       if (usedVertexProps.empty()) {
-        // markAsToBeDeleted();
-        // return depsPruneProperties(propsUsed_, qctx_, spaceID_);
+        node->markDeleted();
+        status_ = depsPruneProperties(node->dependencies());
+        return;
       }
       prunedVertexProps->reserve(usedVertexProps.size());
       for (auto &vertexProp : *vertexProps) {
@@ -238,9 +240,9 @@ void PrunePropertiesVisitor::visit(AppendVertices *node) {
         }
       }
     } else {
-      // AppendVertices should be deleted when no props are used by the parent node
-      // markAsToBeDeleted();
-      // It could be done by ColumnPruner
+      node->markDeleted();
+      status_ = depsPruneProperties(node->dependencies());
+      return;
     }
     node->setVertexProps(std::move(prunedVertexProps));
   }