diff --git a/source/libs/executor/inc/executorInt.h b/source/libs/executor/inc/executorInt.h
index 4c70697bb8..7f66b4469a 100644
--- a/source/libs/executor/inc/executorInt.h
+++ b/source/libs/executor/inc/executorInt.h
@@ -147,6 +147,7 @@ typedef struct SLimitInfo {
 } SLimitInfo;
 
 typedef struct SSortMergeJoinOperatorParam {
+  bool initParam;
 } SSortMergeJoinOperatorParam;
 
 typedef struct SExchangeOperatorBasicParam {
diff --git a/source/libs/executor/src/dynqueryctrloperator.c b/source/libs/executor/src/dynqueryctrloperator.c
index 86627b6578..b323ad7874 100755
--- a/source/libs/executor/src/dynqueryctrloperator.c
+++ b/source/libs/executor/src/dynqueryctrloperator.c
@@ -36,7 +36,7 @@ void freeVgTableList(void* ptr) {
 
 static void destroyDynQueryCtrlOperator(void* param) {
   SDynQueryCtrlOperatorInfo* pDyn = (SDynQueryCtrlOperatorInfo*)param;
-  qDebug("dynQueryCtrl exec info, prevBlk:%" PRId64 ", prevRows:%" PRId64 ", postBlk:%" PRId64 ", postRows:%" PRId64, 
+  qError("dynQueryCtrl exec info, prevBlk:%" PRId64 ", prevRows:%" PRId64 ", postBlk:%" PRId64 ", postRows:%" PRId64, 
          pDyn->execInfo.prevBlkNum, pDyn->execInfo.prevBlkRows, pDyn->execInfo.postBlkNum, pDyn->execInfo.postBlkRows);
 
   if (pDyn->stbJoin.ctx.prev.leftVg) {
@@ -158,7 +158,7 @@ static FORCE_INLINE int32_t buildBatchExchangeOperatorParam(SOperatorParam** ppR
 }
 
 
-static FORCE_INLINE int32_t buildMergeJoinOperatorParam(SOperatorParam** ppRes, SOperatorParam* pChild0, SOperatorParam* pChild1) {
+static FORCE_INLINE int32_t buildMergeJoinOperatorParam(SOperatorParam** ppRes, bool initParam, SOperatorParam* pChild0, SOperatorParam* pChild1) {
   *ppRes = taosMemoryMalloc(sizeof(SOperatorParam));
   if (NULL == *ppRes) {
     return TSDB_CODE_OUT_OF_MEMORY;
@@ -178,6 +178,8 @@ static FORCE_INLINE int32_t buildMergeJoinOperatorParam(SOperatorParam** ppRes,
   if (NULL == pJoin) {
     return TSDB_CODE_OUT_OF_MEMORY;
   }
+
+  pJoin->initParam = initParam;
   
   (*ppRes)->opType = QUERY_NODE_PHYSICAL_PLAN_MERGE_JOIN;
   (*ppRes)->value = pJoin;
@@ -214,7 +216,7 @@ static int32_t buildSeqStbJoinOperatorParam(SDynQueryCtrlOperatorInfo* pInfo, SS
     code = buildGroupCacheOperatorParam(&pGcParam1, 1, *rightVg, *rightUid, pExcParam1);
   }
   if (TSDB_CODE_SUCCESS == code) {
-    code = buildMergeJoinOperatorParam(ppParam, pGcParam0, pGcParam1);
+    code = buildMergeJoinOperatorParam(ppParam, false, pGcParam0, pGcParam1);
   }
   return code;
 }
@@ -254,7 +256,7 @@ static int32_t buildSeqBatchStbJoinOperatorParam(SDynQueryCtrlOperatorInfo* pInf
     code = buildGroupCacheOperatorParam(&pGcParam1, 1, *rightVg, *rightUid, pExcParam1);
   }
   if (TSDB_CODE_SUCCESS == code) {
-    code = buildMergeJoinOperatorParam(ppParam, pGcParam0, pGcParam1);
+    code = buildMergeJoinOperatorParam(ppParam, pExcParam0 ? true : false, pGcParam0, pGcParam1);
   }
   return code;
 }
diff --git a/source/libs/executor/src/mergejoinoperator.c b/source/libs/executor/src/mergejoinoperator.c
index 9493ae9315..8a28a29ab9 100644
--- a/source/libs/executor/src/mergejoinoperator.c
+++ b/source/libs/executor/src/mergejoinoperator.c
@@ -650,7 +650,8 @@ static void setMergeJoinDone(SOperatorInfo* pOperator) {
 
 static bool mergeJoinGetNextTimestamp(SOperatorInfo* pOperator, int64_t* pLeftTs, int64_t* pRightTs) {
   SMJoinOperatorInfo* pJoinInfo = pOperator->info;
-
+  bool leftEmpty = false;
+  
   if (pJoinInfo->pLeft == NULL || pJoinInfo->leftPos >= pJoinInfo->pLeft->info.rows) {
     pJoinInfo->pLeft = getNextBlockFromDownstream(pOperator, 0);
 
@@ -658,7 +659,11 @@ static bool mergeJoinGetNextTimestamp(SOperatorInfo* pOperator, int64_t* pLeftTs
     if (pJoinInfo->pLeft == NULL) {
       qError("merge join left got empty block");
       setMergeJoinDone(pOperator);
-      return false;
+      if (pOperator->pOperatorParam && ((SSortMergeJoinOperatorParam*)pOperator->pOperatorParam->value)->initParam) {
+        leftEmpty = true;
+      } else {
+        return false;
+      }
     } else {
       qError("merge join left got block");
     }
@@ -674,8 +679,12 @@ static bool mergeJoinGetNextTimestamp(SOperatorInfo* pOperator, int64_t* pLeftTs
       return false;
     } else {
       qError("merge join right got block");
+      if (leftEmpty) {
+        return false;
+      }
     }
   }
+  
   // only the timestamp match support for ordinary table
   SColumnInfoData* pLeftCol = taosArrayGet(pJoinInfo->pLeft->pDataBlock, pJoinInfo->leftCol.slotId);
   char*            pLeftVal = colDataGetData(pLeftCol, pJoinInfo->leftPos);