diff --git a/src/client/src/tscSub.c b/src/client/src/tscSub.c
index f3d7ef28c05fc3128622f8217341d52327d79ec0..32257f5a7c723d04ec0f8200c889a68d78cf7824 100644
--- a/src/client/src/tscSub.c
+++ b/src/client/src/tscSub.c
@@ -503,9 +503,19 @@ TAOS_RES *taos_consume(TAOS_SUB *tsub) {
   SSqlCmd *pCmd = &pSql->cmd;
   STableMetaInfo *pTableMetaInfo = tscGetTableMetaInfoFromCmd(pCmd, pCmd->clauseIndex, 0);
   SQueryInfo *pQueryInfo = tscGetQueryInfoDetail(pCmd, 0);
-  if (taosArrayGetSize(pSub->progress) > 0) { // fix crash in single tabel subscription
-    pQueryInfo->window.skey = ((SSubscriptionProgress*)taosArrayGet(pSub->progress, 0))->key;
-    tscDebug("subscribe:%s set subscribe skey:%"PRId64, pSub->topic, pQueryInfo->window.skey);
+  if (taosArrayGetSize(pSub->progress) > 0) { // fix crash in single table subscription
+
+    size_t size = taosArrayGetSize(pSub->progress);
+    TSKEY s = INT64_MAX;
+    for(int32_t i = 0; i < size; ++i) {
+      TSKEY k = ((SSubscriptionProgress*)taosArrayGet(pSub->progress, i))->key;
+      if (s > k) {
+        s = k;
+      }
+    }
+
+    pQueryInfo->window.skey = s;
+    tscDebug("subscribe:%s set next round subscribe skey:%"PRId64, pSub->topic, pQueryInfo->window.skey);
   }
 
   if (pSub->pTimer == NULL) {
diff --git a/src/query/src/qExecutor.c b/src/query/src/qExecutor.c
index ffb6a316a60c1dbdab8f7502507cdcfb73d94b28..dca0e1f46413eec50e8d13350ec4725701f5cb52 100644
--- a/src/query/src/qExecutor.c
+++ b/src/query/src/qExecutor.c
@@ -3976,7 +3976,10 @@ static STableIdInfo createTableIdInfo(STableQueryInfo* pTableQueryInfo) {
   return tidInfo;
 }
 
-static void updateTableIdInfo(STableQueryInfo* pTableQueryInfo, SHashObj* pTableIdInfo) {
+static void updateTableIdInfo(STableQueryInfo* pTableQueryInfo, SSDataBlock* pBlock, SHashObj* pTableIdInfo, int32_t order) {
+  int32_t step = GET_FORWARD_DIRECTION_FACTOR(order);
+  pTableQueryInfo->lastKey = ((order == TSDB_ORDER_ASC)? pBlock->info.window.ekey:pBlock->info.window.skey) + step;
+
   STableIdInfo tidInfo = createTableIdInfo(pTableQueryInfo);
   STableIdInfo *idinfo = taosHashGet(pTableIdInfo, &tidInfo.tid, sizeof(tidInfo.tid));
   if (idinfo != NULL) {
@@ -4408,7 +4411,10 @@ static SSDataBlock* doArithmeticOperation(void* param) {
   SQueryRuntimeEnv* pRuntimeEnv = pOperator->pRuntimeEnv;
   SOptrBasicInfo *pInfo = &pArithInfo->binfo;
 
-  pInfo->pRes->info.rows = 0;
+  SSDataBlock* pRes = pInfo->pRes;
+  int32_t order = pRuntimeEnv->pQuery->order.order;
+
+  pRes->info.rows = 0;
 
   while(1) {
     SSDataBlock* pBlock = pOperator->upstream->exec(pOperator->upstream);
@@ -4417,17 +4423,20 @@ static SSDataBlock* doArithmeticOperation(void* param) {
       break;
     }
 
-    setTagValue(pOperator, pRuntimeEnv->pQuery->current->pTable, pInfo->pCtx, pOperator->numOfOutput);
+    STableQueryInfo* pTableQueryInfo = pRuntimeEnv->pQuery->current;
+
+    // todo dynamic set tags
+    setTagValue(pOperator, pTableQueryInfo->pTable, pInfo->pCtx, pOperator->numOfOutput);
 
     // the pDataBlock are always the same one, no need to call this again
-    setInputDataBlock(pOperator, pInfo->pCtx, pBlock, pRuntimeEnv->pQuery->order.order);
+    setInputDataBlock(pOperator, pInfo->pCtx, pBlock, order);
     updateOutputBuf(pArithInfo, pBlock->info.rows);
-    arithmeticApplyFunctions(pRuntimeEnv, pInfo->pCtx, pOperator->numOfOutput);
 
-    pInfo->pRes->info.rows = getNumOfResult(pRuntimeEnv, pInfo->pCtx, pOperator->numOfOutput);
-    updateTableIdInfo(pRuntimeEnv->pQuery->current, pRuntimeEnv->pTableRetrieveTsMap);
+    arithmeticApplyFunctions(pRuntimeEnv, pInfo->pCtx, pOperator->numOfOutput);
+    updateTableIdInfo(pTableQueryInfo, pBlock, pRuntimeEnv->pTableRetrieveTsMap, order);
 
-    if (pInfo->pRes->info.rows >= pRuntimeEnv->resultInfo.threshold) {
+    pRes->info.rows = getNumOfResult(pRuntimeEnv, pInfo->pCtx, pOperator->numOfOutput);
+    if (pRes->info.rows >= pRuntimeEnv->resultInfo.threshold) {
       break;
     }
   }