From 9bb21ebbc2e89afef67cf87c6cd7fc05113e1211 Mon Sep 17 00:00:00 2001
From: shenglian zhou <slzhou@taosdata.com>
Date: Mon, 20 Jun 2022 08:45:57 +0800
Subject: [PATCH] fix: double free error during plan optimize

---
 source/libs/planner/src/planOptimizer.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/source/libs/planner/src/planOptimizer.c b/source/libs/planner/src/planOptimizer.c
index b8c6df4b54..be6186f891 100644
--- a/source/libs/planner/src/planOptimizer.c
+++ b/source/libs/planner/src/planOptimizer.c
@@ -1116,18 +1116,18 @@ static int32_t eliminateProjOptimizeImpl(SOptimizeContext* pCxt, SLogicSubplan*
       char* projColumnName = projColumn->colName;
       if (QUERY_NODE_COLUMN == nodeType(childExpr) && strcmp(projColumnName, ((SColumnNode*)childExpr)->colName) == 0 ||
           strcmp(projColumnName, childExpr->aliasName) == 0) {
-        nodesListAppend(pNewChildTargets, pChildTarget);
+        nodesListAppend(pNewChildTargets, nodesCloneNode(pChildTarget));
       }
     }
   }
-
-  TSWAP(pChild->pTargets, pNewChildTargets);
+  nodesDestroyList(pChild->pTargets);
+  pChild->pTargets = pNewChildTargets;
+  
   int32_t code = replaceLogicNode(pLogicSubplan, (SLogicNode*)pProjectNode, pChild);
   if (TSDB_CODE_SUCCESS == code) {
     NODES_CLEAR_LIST(pProjectNode->node.pChildren);
     nodesDestroyNode((SNode*)pProjectNode);
   }
-  NODES_CLEAR_LIST(pNewChildTargets);
   return code;
 }