diff --git a/src/client/src/tscStream.c b/src/client/src/tscStream.c
index 3c8ba00e827f149f923e7889e0ef53885941f173..478787671f0484c58ab6b4d4e484e8096bc7a3d5 100644
--- a/src/client/src/tscStream.c
+++ b/src/client/src/tscStream.c
@@ -620,9 +620,9 @@ void taos_close_stream(TAOS_STREAM *handle) {
     tscDebug("%p stream:%p is closed", pSql, pStream);
     // notify CQ to release the pStream object
     pStream->fp(pStream->param, NULL, NULL);
-    taos_free_result(pSql);
-
     pStream->pSql = NULL;
+
+    taos_free_result(pSql);
     taosTFree(pStream);
   }
 }
diff --git a/src/client/src/tscSubquery.c b/src/client/src/tscSubquery.c
index f9bb18081017795d05f0f452b0a4c8bce3d02ece..e66b361191ba6d81f762a5cba9bf3b511f4b57bf 100644
--- a/src/client/src/tscSubquery.c
+++ b/src/client/src/tscSubquery.c
@@ -278,7 +278,7 @@ static int32_t tscLaunchRealSubqueries(SSqlObj* pSql) {
       tscDebug("%p subIndex: %d, no need to launch query, ignore it", pSql, i);
     
       tscDestroyJoinSupporter(pSupporter);
-      tscFreeSqlObj(pPrevSub);
+      taos_free_result(pPrevSub);
     
       pSql->pSubs[i] = NULL;
       continue;
@@ -1383,7 +1383,7 @@ static void doCleanupSubqueries(SSqlObj *pSql, int32_t numOfSubs, SSubqueryState
     taosTFree(pSupport->localBuffer);
     taosTFree(pSupport);
     
-    tscFreeSqlObj(pSub);
+    taos_free_result(pSub);
   }
   
   free(pState);
diff --git a/src/client/src/tscUtil.c b/src/client/src/tscUtil.c
index 38fb63f18ed6e5342006247264c3566697e02b8b..20c3bc2cb6136b2801b7db8345de87ed5e67657a 100644
--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -1743,8 +1743,6 @@ SSqlObj* createSimpleSubObj(SSqlObj* pSql, void (*fp)(), void* param, int32_t cm
   }
 
   pNew->pTscObj = pSql->pTscObj;
-  T_REF_INC(pNew->pTscObj);
-
   pNew->signature = pNew;
 
   SSqlCmd* pCmd = &pNew->cmd;
@@ -1777,7 +1775,6 @@ SSqlObj* createSimpleSubObj(SSqlObj* pSql, void (*fp)(), void* param, int32_t cm
   tscAddTableMetaInfo(pQueryInfo, pMasterTableMetaInfo->name, NULL, NULL, NULL);
 
   T_REF_INC(pNew->pTscObj);
-
   uint64_t p = (uint64_t) pNew;
   pNew->self = taosCachePut(tscObjCache, &p, sizeof(uint64_t), &pNew, sizeof(uint64_t), 2 * 600 * 1000);
   return pNew;