diff --git a/src/client/src/tscJoinProcess.c b/src/client/src/tscJoinProcess.c
index 375e0066b1..a94b308e87 100644
--- a/src/client/src/tscJoinProcess.c
+++ b/src/client/src/tscJoinProcess.c
@@ -528,8 +528,7 @@ void tscFetchDatablockFromSubquery(SSqlObj* pSql) {
         numOfFetch++;
       }
     } else {
-      if ((pRes->row >= pRes->numOfRows && (!tscHasReachLimitation(pSql->pSubs[i])) &&
-        tscProjectionQueryOnTable(&pSql->cmd)) || (pRes->numOfRows == 0)) {
+      if (pRes->row >= pRes->numOfRows && (!tscHasReachLimitation(pSql->pSubs[i]))) {
         numOfFetch++;
       }
     }
diff --git a/src/system/detail/inc/vnode.h b/src/system/detail/inc/vnode.h
index 4ac0848427..37e31803d0 100644
--- a/src/system/detail/inc/vnode.h
+++ b/src/system/detail/inc/vnode.h
@@ -339,7 +339,7 @@ extern void *     vnodeTmrCtrl;
 // read API
 extern int (*vnodeSearchKeyFunc[])(char *pValue, int num, TSKEY key, int order);
 
-void *vnodeQueryInTimeRange(SMeterObj **pMeterObj, SSqlGroupbyExpr *pGroupbyExpr, SSqlFunctionExpr *sqlExprs,
+void *vnodeQueryOnSingleTable(SMeterObj **pMeterObj, SSqlGroupbyExpr *pGroupbyExpr, SSqlFunctionExpr *sqlExprs,
                             SQueryMeterMsg *pQueryMsg, int *code);
 
 void *vnodeQueryOnMultiMeters(SMeterObj **pMeterObj, SSqlGroupbyExpr *pGroupbyExpr, SSqlFunctionExpr *pSqlExprs,
diff --git a/src/system/detail/src/vnodeQueryProcess.c b/src/system/detail/src/vnodeQueryProcess.c
index f39ca0dea1..231b47206e 100644
--- a/src/system/detail/src/vnodeQueryProcess.c
+++ b/src/system/detail/src/vnodeQueryProcess.c
@@ -890,8 +890,6 @@ static void vnodeMultiMeterQueryProcessor(SQInfo *pQInfo) {
 
     dTrace("QInfo:%p points returned:%d, totalRead:%d totalReturn:%d", pQInfo, pQuery->pointsRead, pQInfo->pointsRead,
            pQInfo->pointsReturned);
-    
-    vnodeDecRefCount(pQInfo);
     return;
   }
 
@@ -899,7 +897,6 @@ static void vnodeMultiMeterQueryProcessor(SQInfo *pQInfo) {
   if (pSupporter->pMeterDataInfo == NULL) {
     dError("QInfo:%p failed to allocate memory, %s", pQInfo, strerror(errno));
     pQInfo->code = -TSDB_CODE_SERV_OUT_OF_MEMORY;
-    vnodeDecRefCount(pQInfo);
     return;
   }
 
@@ -916,7 +913,6 @@ static void vnodeMultiMeterQueryProcessor(SQInfo *pQInfo) {
   // failed to save all intermediate results into disk, abort further query processing
   if (doCloseAllOpenedResults(pSupporter) != TSDB_CODE_SUCCESS) {
     dError("QInfo:%p failed to save intermediate results, abort further query processing", pQInfo);
-    vnodeDecRefCount(pQInfo);
     return;
   }
   
@@ -924,7 +920,6 @@ static void vnodeMultiMeterQueryProcessor(SQInfo *pQInfo) {
 
   if (isQueryKilled(pQuery)) {
     dTrace("QInfo:%p query killed, abort", pQInfo);
-    vnodeDecRefCount(pQInfo);
     return;
   }
 
@@ -946,7 +941,6 @@ static void vnodeMultiMeterQueryProcessor(SQInfo *pQInfo) {
   pQInfo->pointsRead += pQuery->pointsRead;
   dTrace("QInfo:%p points returned:%d, totalRead:%d totalReturn:%d", pQInfo, pQuery->pointsRead, pQInfo->pointsRead,
          pQInfo->pointsReturned);
-  vnodeDecRefCount(pQInfo);
 }
 
 /*
diff --git a/src/system/detail/src/vnodeRead.c b/src/system/detail/src/vnodeRead.c
index 2ea41d9d58..5640c6bc0d 100644
--- a/src/system/detail/src/vnodeRead.c
+++ b/src/system/detail/src/vnodeRead.c
@@ -512,8 +512,9 @@ void vnodeDecRefCount(void *param) {
   assert(vnodeIsQInfoValid(pQInfo));
   
   int32_t ref = atomic_sub_fetch_32(&pQInfo->refCount, 1);
-  dTrace("QInfo:%p decrease obj refcount, %d", pQInfo, ref);
+  assert(ref >= 0);
   
+  dTrace("QInfo:%p decrease obj refcount, %d", pQInfo, ref);
   if (ref == 0) {
     vnodeFreeQInfo(pQInfo, true);
   }
@@ -616,7 +617,7 @@ void vnodeQueryData(SSchedMsg *pMsg) {
   vnodeDecRefCount(pQInfo);
 }
 
-void *vnodeQueryInTimeRange(SMeterObj **pMetersObj, SSqlGroupbyExpr *pGroupbyExpr, SSqlFunctionExpr *pSqlExprs,
+void *vnodeQueryOnSingleTable(SMeterObj **pMetersObj, SSqlGroupbyExpr *pGroupbyExpr, SSqlFunctionExpr *pSqlExprs,
                             SQueryMeterMsg *pQueryMsg, int32_t *code) {
   SQInfo *pQInfo;
   SQuery *pQuery;
@@ -687,6 +688,7 @@ void *vnodeQueryInTimeRange(SMeterObj **pMetersObj, SSqlGroupbyExpr *pGroupbyExp
     }
 
     if (pQInfo->over == 1) {
+      vnodeAddRefCount(pQInfo);  // for retrieve procedure
       return pQInfo;
     }
 
@@ -811,13 +813,13 @@ void *vnodeQueryOnMultiMeters(SMeterObj **pMetersObj, SSqlGroupbyExpr *pGroupbyE
     goto _error;
   }
 
+  vnodeAddRefCount(pQInfo);
   if (pQInfo->over == 1) {
     return pQInfo;
   }
 
 //  pQInfo->signature = TSDB_QINFO_QUERY_FLAG;
   vnodeAddRefCount(pQInfo);
-  vnodeAddRefCount(pQInfo);
   
   schedMsg.msg = NULL;
   schedMsg.thandle = (void *)1;
diff --git a/src/system/detail/src/vnodeShell.c b/src/system/detail/src/vnodeShell.c
index 6ff3f4d27c..5efbb41014 100644
--- a/src/system/detail/src/vnodeShell.c
+++ b/src/system/detail/src/vnodeShell.c
@@ -376,7 +376,7 @@ int vnodeProcessQueryRequest(char *pMsg, int msgLen, SShellObj *pObj) {
   if (QUERY_IS_STABLE_QUERY(pQueryMsg->queryType)) {
     pObj->qhandle = vnodeQueryOnMultiMeters(pMeterObjList, pGroupbyExpr, pExprs, pQueryMsg, &code);
   } else {
-    pObj->qhandle = vnodeQueryInTimeRange(pMeterObjList, pGroupbyExpr, pExprs, pQueryMsg, &code);
+    pObj->qhandle = vnodeQueryOnSingleTable(pMeterObjList, pGroupbyExpr, pExprs, pQueryMsg, &code);
   }
 
 _query_over: