diff --git a/source/libs/planner/src/planOptimizer.c b/source/libs/planner/src/planOptimizer.c
index c7ce9aed76..6bb314befd 100644
--- a/source/libs/planner/src/planOptimizer.c
+++ b/source/libs/planner/src/planOptimizer.c
@@ -6493,6 +6493,7 @@ static int32_t partitionColsOpt(SOptimizeContext* pCxt, SLogicSubplan* pLogicSub
       pSort->calcGroupId = true;
       code = replaceLogicNode(pLogicSubplan, (SLogicNode*)pNode, (SLogicNode*)pSort);
       if (code == TSDB_CODE_SUCCESS) {
+        nodesDestroyNode((SNode*)pNode);
         pCxt->optimized = true;
       } else {
         nodesDestroyNode((SNode*)pSort);