diff --git a/src/client/src/tscStream.c b/src/client/src/tscStream.c
index 1ebef4ce0f..fed9caebbe 100644
--- a/src/client/src/tscStream.c
+++ b/src/client/src/tscStream.c
@@ -572,6 +572,7 @@ TAOS_STREAM *taos_open_stream(TAOS *taos, const char *sqlstr, void (*fp)(void *p
   pStream->pSql = pSql;
   pSql->pStream = pStream;
   pSql->param = pStream;
+  pSql->maxRetry = TSDB_MAX_REPLICA;
 
   pSql->sqlstr = calloc(1, strlen(sqlstr) + 1);
   if (pSql->sqlstr == NULL) {
@@ -579,6 +580,7 @@ TAOS_STREAM *taos_open_stream(TAOS *taos, const char *sqlstr, void (*fp)(void *p
     tscFreeSqlObj(pSql);
     return NULL;
   }
+
   strtolower(pSql->sqlstr, sqlstr);
 
   tscDebugL("%p SQL: %s", pSql, pSql->sqlstr);
@@ -619,10 +621,9 @@ 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 f9bb180810..e66b361191 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 38fb63f18e..20c3bc2cb6 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;
diff --git a/src/mnode/src/mnodeTable.c b/src/mnode/src/mnodeTable.c
index a35f09cd8d..cb606df692 100644
--- a/src/mnode/src/mnodeTable.c
+++ b/src/mnode/src/mnodeTable.c
@@ -1384,6 +1384,9 @@ int32_t mnodeRetrieveShowSuperTables(SShowObj *pShow, char *data, int32_t rows,
   }
 
   pShow->numOfReads += numOfRows;
+  const int32_t NUM_OF_COLUMNS = 5;
+
+  mnodeVacuumResult(data, NUM_OF_COLUMNS, numOfRows, rows, pShow);
   mnodeDecDbRef(pDb);
 
   return numOfRows;
diff --git a/src/util/src/tcache.c b/src/util/src/tcache.c
index e1dd521547..a6376e49ad 100644
--- a/src/util/src/tcache.c
+++ b/src/util/src/tcache.c
@@ -266,7 +266,7 @@ void *taosCacheAcquireByKey(SCacheObj *pCacheObj, const void *key, size_t keyLen
 
   if (taosHashGetSize(pCacheObj->pHashTable) == 0) {
     atomic_add_fetch_32(&pCacheObj->statistics.missCount, 1);
-    uError("cache:%s, key:%p, not in cache, retrieved failed, reason: empty sqlObj cache", pCacheObj->name, key);
+    uError("cache:%s, key:%p, not in cache, retrieved failed, reason: empty cache", pCacheObj->name, key);
     return NULL;
   }