diff --git a/include/libs/nodes/plannodes.h b/include/libs/nodes/plannodes.h
index c235b693b3..5ef2464f8e 100644
--- a/include/libs/nodes/plannodes.h
+++ b/include/libs/nodes/plannodes.h
@@ -162,6 +162,7 @@ typedef struct SGroupCacheLogicNode {
   bool        grpColsMayBeNull;  
   bool        grpByUid;
   bool        globalGrp;
+  bool        enableCache;
   SNodeList*  pGroupCols;
 } SGroupCacheLogicNode;
 
@@ -445,6 +446,7 @@ typedef struct SGroupCachePhysiNode {
   bool       grpColsMayBeNull;
   bool       grpByUid;
   bool       globalGrp;
+  bool       enableCache;
   SNodeList* pGroupCols;
 } SGroupCachePhysiNode;
 
diff --git a/source/libs/executor/inc/executorInt.h b/source/libs/executor/inc/executorInt.h
index f14547d1bc..1c1dab1df7 100644
--- a/source/libs/executor/inc/executorInt.h
+++ b/source/libs/executor/inc/executorInt.h
@@ -108,7 +108,6 @@ typedef struct SExchangeOpStopInfo {
 typedef struct SGcOperatorParam {
   int64_t             sessionId;
   int32_t             downstreamIdx;
-  bool                needCache;
   int32_t             vgId;
   int64_t             tbUid;
 } SGcOperatorParam;
diff --git a/source/libs/executor/inc/groupcache.h b/source/libs/executor/inc/groupcache.h
index a0274ff001..2b5176eba6 100755
--- a/source/libs/executor/inc/groupcache.h
+++ b/source/libs/executor/inc/groupcache.h
@@ -45,7 +45,6 @@ typedef struct SGroupCacheData {
   TdThreadMutex  mutex;
   SArray*        waitQueue;
   bool           fetchDone;
-  bool           needCache;
   SSDataBlock*   pBlock;
   SGcVgroupCtx*  pVgCtx;
   int32_t        downstreamIdx;
@@ -89,17 +88,19 @@ typedef struct SGcDownstreamCtx {
   SSDataBlock*  pBaseBlock;
   SArray*       pFreeBlock;
   int64_t       lastBlkUid;
+  SHashObj*     pSessions;  
+  SHashObj*     pWaitSessions;  
 } SGcDownstreamCtx;
 
 typedef struct SGcSessionCtx {
   int32_t           downstreamIdx;
-  bool              needCache;
   SGcOperatorParam* pParam;
   SGroupCacheData*  pGroupData;
   int64_t           lastBlkId;
   int64_t           nextOffset;
   bool              semInit;
   tsem_t            waitSem;
+  bool              newFetch;
 } SGcSessionCtx;
 
 typedef struct SGcExecInfo {
@@ -113,11 +114,6 @@ typedef struct SGcCacheFile {
   int64_t  fileSize;
 } SGcCacheFile;
 
-typedef struct SGcReadBlkInfo {
-  SSDataBlock* pBlock;
-  int64_t      nextOffset;
-} SGcReadBlkInfo;
-
 typedef struct SGcBlkCacheInfo {
   SRWLatch       dirtyLock;
   SSHashObj*     pCacheFile;
@@ -132,10 +128,10 @@ typedef struct SGroupCacheOperatorInfo {
   TdThreadMutex     sessionMutex;
   int64_t           maxCacheSize;
   int64_t           currentBlkId;
-  SHashObj*         pSessionHash;  
   SGroupColsInfo    groupColsInfo;
   bool              globalGrp;
   bool              grpByUid;
+  bool              enableCache;
   SGcDownstreamCtx* pDownstreams;
   SGcBlkCacheInfo   blkCache;
   SHashObj*         pGrpHash;  
diff --git a/source/libs/executor/inc/operator.h b/source/libs/executor/inc/operator.h
index 8bd80c438f..825f2cbd90 100644
--- a/source/libs/executor/inc/operator.h
+++ b/source/libs/executor/inc/operator.h
@@ -66,6 +66,7 @@ typedef struct SOperatorInfo {
   int16_t                resultDataBlockId;
   bool                   blocking;  // block operator or not
   bool                   transparent;
+  bool                   dynamicTask;
   uint8_t                status;    // denote if current operator is completed
   char*                  name;      // name, for debug purpose
   void*                  info;      // extension attribution
diff --git a/source/libs/executor/src/dynqueryctrloperator.c b/source/libs/executor/src/dynqueryctrloperator.c
index c8f7ece8fa..a6ab5f5b49 100755
--- a/source/libs/executor/src/dynqueryctrloperator.c
+++ b/source/libs/executor/src/dynqueryctrloperator.c
@@ -36,7 +36,7 @@ static void destroyDynQueryCtrlOperator(void* param) {
   taosMemoryFreeClear(param);
 }
 
-static FORCE_INLINE int32_t buildGroupCacheOperatorParam(SOperatorParam** ppRes, int32_t downstreamIdx, bool needCache, int32_t vgId, int64_t tbUid, SOperatorParam* pChild) {
+static FORCE_INLINE int32_t buildGroupCacheOperatorParam(SOperatorParam** ppRes, int32_t downstreamIdx, int32_t vgId, int64_t tbUid, SOperatorParam* pChild) {
   *ppRes = taosMemoryMalloc(sizeof(SOperatorParam));
   if (NULL == *ppRes) {
     return TSDB_CODE_OUT_OF_MEMORY;
@@ -56,7 +56,6 @@ static FORCE_INLINE int32_t buildGroupCacheOperatorParam(SOperatorParam** ppRes,
 
   pGc->sessionId = atomic_add_fetch_64(&gSessionId, 1);
   pGc->downstreamIdx = downstreamIdx;
-  pGc->needCache = needCache;
   pGc->vgId = vgId;
   pGc->tbUid = tbUid;
 
@@ -146,10 +145,10 @@ static int32_t buildStbJoinOperatorParam(SDynQueryCtrlOperatorInfo* pInfo, SStbJ
     code = buildExchangeOperatorParam(&pExcParam1, 1, rightVg, rightUid, NULL);
   }
   if (TSDB_CODE_SUCCESS == code) {
-    code = buildGroupCacheOperatorParam(&pGcParam0, 0, false, *leftVg, *leftUid, pExcParam0);
+    code = buildGroupCacheOperatorParam(&pGcParam0, 0, *leftVg, *leftUid, pExcParam0);
   }
   if (TSDB_CODE_SUCCESS == code) {
-    code = buildGroupCacheOperatorParam(&pGcParam1, 1, false, *rightVg, *rightUid, pExcParam1);
+    code = buildGroupCacheOperatorParam(&pGcParam1, 1, *rightVg, *rightUid, pExcParam1);
   }
   if (TSDB_CODE_SUCCESS == code) {
     code = buildMergeJoinOperatorParam(ppParam, pGcParam0, pGcParam1);
diff --git a/source/libs/executor/src/groupcacheoperator.c b/source/libs/executor/src/groupcacheoperator.c
index 137c3e6116..a739fab23d 100755
--- a/source/libs/executor/src/groupcacheoperator.c
+++ b/source/libs/executor/src/groupcacheoperator.c
@@ -80,7 +80,6 @@ static void destroyGroupCacheOperator(void* param) {
   
   taosMemoryFree(pGrpCacheOperator->groupColsInfo.pColsInfo);
   taosMemoryFree(pGrpCacheOperator->groupColsInfo.pBuf);
-  taosHashCleanup(pGrpCacheOperator->pSessionHash);
   taosHashCleanup(pGrpCacheOperator->pGrpHash);
   
   taosMemoryFreeClear(param);
@@ -164,12 +163,10 @@ static int32_t acquireBaseBlockFromList(SGcDownstreamCtx* pCtx, SSDataBlock** pp
   return TSDB_CODE_SUCCESS;  
 }
 
-static int32_t releaseBaseBlockFromList(SGcDownstreamCtx* pCtx, SSDataBlock* pBlock) {
+static void releaseBaseBlockToList(SGcDownstreamCtx* pCtx, SSDataBlock* pBlock) {
   taosWLockLatch(&pCtx->blkLock);
   taosArrayPush(pCtx->pFreeBlock, &pBlock);
   taosWUnLockLatch(&pCtx->blkLock);
-
-  return TSDB_CODE_SUCCESS;  
 }
 
 
@@ -182,15 +179,9 @@ static int32_t buildGroupCacheResultBlock(SGroupCacheOperatorInfo* pGCache, int3
   return blockDataFromBuf(*ppRes, pBufInfo->pBuf);
 }
 
-static int32_t retrieveBlkFromBufCache(SGroupCacheOperatorInfo* pGCache, SGroupCacheData* pGrp, int64_t blkId, int64_t* nextOffset, SSDataBlock** ppRes) {
+static int32_t retrieveBlkFromBufCache(SGroupCacheOperatorInfo* pGCache, SGroupCacheData* pGrp, int64_t sessionId, int64_t blkId, int64_t* nextOffset, SSDataBlock** ppRes) {
   int32_t code = TSDB_CODE_SUCCESS;
   SGcBlkCacheInfo* pCache = &pGCache->blkCache;
-  SGcReadBlkInfo* pReadBlk = taosHashAcquire(pCache->pReadBlk, &blkId, sizeof(blkId));
-  if (pReadBlk) {
-    *ppRes = pReadBlk->pBlock;
-    *nextOffset = pReadBlk->nextOffset;
-    return TSDB_CODE_SUCCESS;
-  }
 
   taosRLockLatch(&pCache->dirtyLock);
   SGcBlkBufInfo* pBufInfo = taosHashAcquire(pCache->pDirtyBlk, &blkId, sizeof(blkId));
@@ -202,8 +193,8 @@ static int32_t retrieveBlkFromBufCache(SGroupCacheOperatorInfo* pGCache, SGroupC
     }
 
     *nextOffset = pBufInfo->offset + pBufInfo->bufSize;
-    SGcReadBlkInfo readBlk = {.pBlock = *ppRes, .nextOffset = *nextOffset};
-    taosHashPut(pCache->pReadBlk, &blkId, sizeof(blkId), &readBlk, sizeof(readBlk));
+
+    taosHashPut(pCache->pReadBlk, &sessionId, sizeof(sessionId), ppRes, POINTER_BYTES);
     return TSDB_CODE_SUCCESS;
   }
   taosRUnLockLatch(&pCache->dirtyLock);
@@ -279,9 +270,11 @@ static FORCE_INLINE int32_t getBlkFromDownstreamOperator(struct SOperatorInfo* p
   SOperatorParam* pDownstreamParam = NULL;
   SSDataBlock* pBlock = NULL;
   SGroupCacheOperatorInfo* pGCache = pOperator->info;
-  code = appendNewGroupToDownstream(pOperator, downstreamIdx, &pDownstreamParam);
-  if (code) {
-    return code;
+  if (pGCache->enableCache) {
+    code = appendNewGroupToDownstream(pOperator, downstreamIdx, &pDownstreamParam);
+    if (code) {
+      return code;
+    }
   }
 
   if (pDownstreamParam) {
@@ -290,7 +283,7 @@ static FORCE_INLINE int32_t getBlkFromDownstreamOperator(struct SOperatorInfo* p
     pBlock = pOperator->pDownstream[downstreamIdx]->fpSet.getNextFn(pOperator->pDownstream[downstreamIdx]);
   }
 
-  if (pBlock) {
+  if (pBlock && pGCache->enableCache) {
     pGCache->execInfo.pDownstreamBlkNum[downstreamIdx]++;
     if (NULL == pGCache->pDownstreams[downstreamIdx].pBaseBlock) {
       code = buildGroupCacheBaseBlock(&pGCache->pDownstreams[downstreamIdx].pBaseBlock, pBlock);
@@ -359,41 +352,36 @@ static int32_t handleGroupCacheRetrievedBlk(struct SOperatorInfo* pOperator, SSD
   SGcDownstreamCtx* pCtx = &pGCache->pDownstreams[pSession->downstreamIdx];
   SHashObj* pGrpHash = pGCache->globalGrp ? pGCache->pGrpHash : pCtx->pGrpHash;
 
-  if (pGCache->grpByUid) {
-    SGroupCacheData* pGroup = taosHashGet(pGrpHash, &pBlock->info.id.uid, sizeof(pBlock->info.id.uid));
-    if (NULL == pGroup) {
-      qError("table uid:%" PRIu64 " not found in group hash", pBlock->info.id.uid);
-      return TSDB_CODE_INVALID_PARA;
-    }
-    
-    handleVgroupTableFetchDone(pCtx, pGroup, pBlock->info.id.uid);
-    
-    pGroup->pBlock = pBlock;
-    
-    if (pGroup->needCache) {
-      SGcBlkBufInfo newBlkBuf;
-      code = addBlkToBufCache(pOperator, pBlock, pCtx, pGroup, &newBlkBuf);
-      if (code) {
-        return code;
-      }
-      
-      if (pGroup->endBlkId > 0) {
-        pGroup->endBlkId = newBlkBuf.blkId;
-      } else {
-        pGroup->startBlkId = newBlkBuf.blkId;
-        pGroup->endBlkId = newBlkBuf.blkId;
-      }
-    }
+  SGroupCacheData* pGroup = taosHashGet(pGrpHash, &pBlock->info.id.groupId, sizeof(pBlock->info.id.groupId));
+  if (NULL == pGroup) {
+    qError("table uid:%" PRIu64 " not found in group hash", pBlock->info.id.groupId);
+    return TSDB_CODE_INVALID_PARA;
+  }
+  
+  handleVgroupTableFetchDone(pCtx, pGroup, pBlock->info.id.groupId);
 
-    notifyWaitingSessions(pGroup->waitQueue);
-    if (pGroup == pSession->pGroupData) {
-      *continueFetch = false;
-    }
-
-    return TSDB_CODE_SUCCESS;
+  SGcBlkBufInfo newBlkBuf;    
+  code = addBlkToBufCache(pOperator, pBlock, pCtx, pGroup, &newBlkBuf);
+  if (code) {
+    return code;
+  }
+  
+  if (pGroup->endBlkId > 0) {
+    pGroup->endBlkId = newBlkBuf.blkId;
+  } else {
+    pGroup->startBlkId = newBlkBuf.blkId;
+    pGroup->endBlkId = newBlkBuf.blkId;
   }
 
-  return TSDB_CODE_INVALID_PARA;
+  notifyWaitingSessions(pGroup->waitQueue);
+  if (pGroup == pSession->pGroupData) {
+    pSession->lastBlkId = newBlkBuf.blkId;
+    pSession->nextOffset = newBlkBuf.offset + newBlkBuf.bufSize;
+    
+    *continueFetch = false;
+  }
+
+  return TSDB_CODE_SUCCESS;
 }
 
 static int32_t handleDownstreamFetchDone(struct SOperatorInfo* pOperator, SGcSessionCtx* pSession) {
@@ -413,13 +401,16 @@ static int32_t handleDownstreamFetchDone(struct SOperatorInfo* pOperator, SGcSes
     taosArrayClear(pVgCtx->pTbList);
   }
 
+  taosHashClear(pCtx->pWaitSessions);
+
   return TSDB_CODE_SUCCESS;
 }
 
-static int32_t getCacheBlkFromDownstreamOperator(struct SOperatorInfo* pOperator, SGcSessionCtx* pSession, SSDataBlock** ppRes) {
+static int32_t getCacheBlkFromDownstreamOperator(struct SOperatorInfo* pOperator, SGcDownstreamCtx* pCtx, int64_t sessionId, SGcSessionCtx* pSession, SSDataBlock** ppRes) {
   bool continueFetch = true;
   int32_t code = TSDB_CODE_SUCCESS;
-  
+  SGroupCacheOperatorInfo* pGCache = pOperator->info;
+
   while (continueFetch && TSDB_CODE_SUCCESS == code) {
     int32_t code = getBlkFromDownstreamOperator(pOperator, pSession->downstreamIdx, ppRes);
     if (TSDB_CODE_SUCCESS != code) {
@@ -429,15 +420,46 @@ static int32_t getCacheBlkFromDownstreamOperator(struct SOperatorInfo* pOperator
     if (NULL == *ppRes) {
       code = handleDownstreamFetchDone(pOperator, pSession);
       break;
-    } else {
+    } else if (pGCache->enableCache) {
       code = handleGroupCacheRetrievedBlk(pOperator, *ppRes, pSession, &continueFetch);
+    } else {
+      continueFetch = false;
     }
   }
 
+  if (!pGCache->enableCache) {
+    return code;
+  }
+
+  if (!continueFetch) {
+    SGcSessionCtx** ppWaitCtx = taosHashIterate(pCtx->pWaitSessions, NULL);
+    if (ppWaitCtx) {
+      taosHashCancelIterate(pCtx->pWaitSessions, ppWaitCtx);
+      int64_t* pSessionId = taosHashGetKey(ppWaitCtx, NULL);
+      if (sessionId != atomic_val_compare_exchange_64(&pCtx->fetchSessionId, sessionId, *pSessionId)) {
+        qError("wrong fetch sessionId: %" PRIu64 " expected: %" PRIu64 , pCtx->fetchSessionId, sessionId);
+        return TSDB_CODE_QRY_EXECUTOR_INTERNAL_ERROR;
+      }
+      SGcSessionCtx* pWaitCtx = *ppWaitCtx;
+      pWaitCtx->newFetch = true;
+      taosHashRemove(pCtx->pWaitSessions, pSessionId, sizeof(*pSessionId));
+      tsem_post(&pWaitCtx->waitSem);
+
+      return code;
+    }
+  }
+
+  if (sessionId != atomic_val_compare_exchange_64(&pCtx->fetchSessionId, sessionId, -1)) {
+    qError("wrong fetch sessionId: %" PRIu64 " expected: %" PRIu64 , pCtx->fetchSessionId, sessionId);
+    return TSDB_CODE_QRY_EXECUTOR_INTERNAL_ERROR;
+  }
+  
   return code;
 }
 
-static int32_t groupCacheSessionWait(SGroupCacheOperatorInfo* pGCache, SGroupCacheData* pGroup, SGcSessionCtx* pSession, SSDataBlock** ppRes) {
+static int32_t groupCacheSessionWait(struct SOperatorInfo* pOperator, SGcDownstreamCtx* pCtx, int64_t sessionId, SGcSessionCtx* pSession, SSDataBlock** ppRes) {
+  SGroupCacheOperatorInfo* pGCache = pOperator->info;
+  SGroupCacheData* pGroup = pSession->pGroupData;
   int32_t code = TSDB_CODE_SUCCESS;
   if (NULL == pGroup->waitQueue) {
     pGroup->waitQueue = taosArrayInit(1, POINTER_BYTES);
@@ -456,77 +478,73 @@ static int32_t groupCacheSessionWait(SGroupCacheOperatorInfo* pGCache, SGroupCac
 
   taosThreadMutexUnlock(&pSession->pGroupData->mutex);
 
+  taosHashPut(pCtx->pWaitSessions, &sessionId, sizeof(sessionId), &pSession, POINTER_BYTES);
+
   tsem_wait(&pSession->waitSem);
 
-  if (pSession->pGroupData->needCache) {
-    if (pSession->lastBlkId < 0) {
-      int64_t startBlkId = atomic_load_64(&pSession->pGroupData->startBlkId);
-      if (startBlkId > 0) {
-        code = retrieveBlkFromBufCache(pGCache, pSession->pGroupData, startBlkId, &pSession->nextOffset, ppRes);
-        pSession->lastBlkId = startBlkId;
-        return code;
-      } else if (pGroup->fetchDone) {
-        *ppRes = NULL;
-        return TSDB_CODE_SUCCESS;
-      }
-    } else if (pSession->lastBlkId < atomic_load_64(&pSession->pGroupData->endBlkId)) {
-      code = retrieveBlkFromBufCache(pGCache, pSession->pGroupData, pSession->lastBlkId + 1, &pSession->nextOffset, ppRes);
-      pSession->lastBlkId++;
-      return code;
-    } else if (pGroup->fetchDone) {
-      *ppRes = NULL;
-      return TSDB_CODE_SUCCESS;
-    }
-  } else {
-    *ppRes = pSession->pGroupData->pBlock;
-    return TSDB_CODE_SUCCESS;
+  if (pSession->newFetch) {
+    pSession->newFetch = false;
+    return getCacheBlkFromDownstreamOperator(pOperator, pCtx, sessionId, pSession, ppRes);
   }
 
-  qError("no block retrieved from downstream and waked up");
-  return TSDB_CODE_QRY_EXECUTOR_INTERNAL_ERROR;
+  taosHashRemove(pCtx->pWaitSessions, &sessionId, sizeof(sessionId));
+
+  if (pSession->lastBlkId < 0) {
+    int64_t startBlkId = atomic_load_64(&pSession->pGroupData->startBlkId);
+    if (startBlkId > 0) {
+      code = retrieveBlkFromBufCache(pGCache, pSession->pGroupData, sessionId, startBlkId, &pSession->nextOffset, ppRes);
+      pSession->lastBlkId = startBlkId;
+    } else if (pGroup->fetchDone) {
+      *ppRes = NULL;
+    }
+  } else if (pSession->lastBlkId < atomic_load_64(&pSession->pGroupData->endBlkId)) {
+    code = retrieveBlkFromBufCache(pGCache, pSession->pGroupData, sessionId, pSession->lastBlkId + 1, &pSession->nextOffset, ppRes);
+    pSession->lastBlkId++;
+  } else if (pGroup->fetchDone) {
+    *ppRes = NULL;
+  }
+
+  return code;
 }
 
 static int32_t getBlkFromSessionCacheImpl(struct SOperatorInfo* pOperator, int64_t sessionId, SGcSessionCtx* pSession, SSDataBlock** ppRes) {
   int32_t code = TSDB_CODE_SUCCESS;
   SGroupCacheOperatorInfo* pGCache = pOperator->info;
   bool locked = false;
+  SGcDownstreamCtx* pCtx = &pGCache->pDownstreams[pSession->downstreamIdx];
   
   while (true) {
-    if (pSession->pGroupData->needCache) {
+    if (pGCache->enableCache) {
       if (pSession->lastBlkId < 0) {
         int64_t startBlkId = atomic_load_64(&pSession->pGroupData->startBlkId);
         if (startBlkId > 0) {
-          code = retrieveBlkFromBufCache(pGCache, pSession->pGroupData, startBlkId, &pSession->nextOffset, ppRes);
+          code = retrieveBlkFromBufCache(pGCache, pSession->pGroupData, sessionId, startBlkId, &pSession->nextOffset, ppRes);
           pSession->lastBlkId = startBlkId;
           goto _return;
         }
       } else if (pSession->lastBlkId < atomic_load_64(&pSession->pGroupData->endBlkId)) {
-        code = retrieveBlkFromBufCache(pGCache, pSession->pGroupData, pSession->lastBlkId + 1, &pSession->nextOffset, ppRes);
+        code = retrieveBlkFromBufCache(pGCache, pSession->pGroupData, sessionId, pSession->lastBlkId + 1, &pSession->nextOffset, ppRes);
         pSession->lastBlkId++;
         goto _return;
       } else if (atomic_load_8((int8_t*)&pSession->pGroupData->fetchDone)) {
         *ppRes = NULL;
         goto _return;
       }
-    } else if (pSession->pGroupData->pBlock || atomic_load_8((int8_t*)&pSession->pGroupData->fetchDone)) {
-      *ppRes = pSession->pGroupData->pBlock;
-      pSession->pGroupData->pBlock = NULL;
-      goto _return;
     }
-
-    if ((atomic_load_64(&pGCache->pDownstreams[pSession->downstreamIdx].fetchSessionId) == sessionId)
-      || (-1 == atomic_val_compare_exchange_64(&pGCache->pDownstreams[pSession->downstreamIdx].fetchSessionId, -1, sessionId))) {
+    
+    if ((atomic_load_64(&pCtx->fetchSessionId) == sessionId)
+      || (-1 == atomic_val_compare_exchange_64(&pCtx->fetchSessionId, -1, sessionId))) {
       if (locked) {
         taosThreadMutexUnlock(&pSession->pGroupData->mutex);
         locked = false;
       }
       
-      code = getCacheBlkFromDownstreamOperator(pOperator, pSession, ppRes);
+      code = getCacheBlkFromDownstreamOperator(pOperator, pCtx, sessionId, pSession, ppRes);
       goto _return;
     }
 
     if (locked) {
-      code = groupCacheSessionWait(pGCache, pSession->pGroupData, pSession, ppRes);
+      code = groupCacheSessionWait(pOperator, pCtx, sessionId, pSession, ppRes);
       locked = false;
       if (TSDB_CODE_SUCCESS != code) {
         goto _return;
@@ -570,7 +588,6 @@ static int32_t initGroupCacheBlockCache(SGroupCacheOperatorInfo* pInfo) {
 
 static FORCE_INLINE void initNewGroupData(SGcDownstreamCtx* pCtx, SGroupCacheData* pGroup, SGcOperatorParam* pGcParam) {
   taosThreadMutexInit(&pGroup->mutex, NULL);
-  pGroup->needCache = pGcParam->needCache;
   pGroup->downstreamIdx = pGcParam->downstreamIdx;
   pGroup->vgId = pGcParam->vgId;
   pGroup->fileId = -1;
@@ -606,7 +623,7 @@ static int32_t addNewGroupData(struct SOperatorInfo* pOperator, SOperatorParam*
       newGroup.pGroup = *ppGrp;
       newGroup.vgId = pGcParam->vgId;
       newGroup.uid = pGcParam->tbUid;
-      newGroup.pParam = taosArrayGet(pParam->pChildren, 0);
+      newGroup.pParam = taosArrayGetP(pParam->pChildren, 0);
       
       taosWLockLatch(&pCtx->grpLock);
       if (NULL == taosArrayPush(pCtx->pNewGrpList, &newGroup)) {
@@ -622,6 +639,14 @@ static int32_t addNewGroupData(struct SOperatorInfo* pOperator, SOperatorParam*
   return TSDB_CODE_SUCCESS;
 }
 
+static FORCE_INLINE void initGroupCacheSessionCtx(SGcSessionCtx* pSession, SGcOperatorParam* pGcParam, SGroupCacheData* pGroup) {
+  pSession->pParam = pGcParam;
+  pSession->downstreamIdx = pGcParam->downstreamIdx;
+  pSession->pGroupData = pGroup;
+  pSession->lastBlkId = -1;
+  pSession->nextOffset = -1;
+}
+
 static int32_t initGroupCacheSession(struct SOperatorInfo* pOperator, SOperatorParam* pParam, SGcSessionCtx** ppSession) {
   int32_t code = TSDB_CODE_SUCCESS;
   SGcSessionCtx ctx = {0};
@@ -631,51 +656,50 @@ static int32_t initGroupCacheSession(struct SOperatorInfo* pOperator, SOperatorP
   SHashObj* pGrpHash = pGCache->globalGrp ? pGCache->pGrpHash : pCtx->pGrpHash;
 
   SGroupCacheData* pGroup = taosHashAcquire(pGrpHash, &pGcParam->tbUid, sizeof(pGcParam->tbUid));
-  if (pGroup) {
-    ctx.pGroupData = pGroup;
-  } else {
-    code = addNewGroupData(pOperator, pParam, &ctx.pGroupData);
+  if (NULL == pGroup) {
+    code = addNewGroupData(pOperator, pParam, &pGroup);
     if (TSDB_CODE_SUCCESS != code) {
       return code;
     }
   }
-  
-  ctx.pParam = pGcParam;
 
-  code = taosHashPut(pGCache->pSessionHash, &pGcParam->sessionId, sizeof(pGcParam->sessionId), &ctx, sizeof(ctx));
+  initGroupCacheSessionCtx(&ctx, pGcParam, pGroup);
+
+  code = taosHashPut(pCtx->pSessions, &pGcParam->sessionId, sizeof(pGcParam->sessionId), &ctx, sizeof(ctx));
   if (TSDB_CODE_SUCCESS != code) {
     return code;
   }
 
-  *ppSession = taosHashGet(pGCache->pSessionHash, &pGcParam->sessionId, sizeof(pGcParam->sessionId));
+  *ppSession = taosHashGet(pCtx->pSessions, &pGcParam->sessionId, sizeof(pGcParam->sessionId));
   
   return TSDB_CODE_SUCCESS;
 }
 
 static int32_t getBlkFromGroupCache(struct SOperatorInfo* pOperator, SSDataBlock** ppRes, SOperatorParam* pParam) {
+  int32_t code = TSDB_CODE_SUCCESS;
   SGroupCacheOperatorInfo* pGCache = pOperator->info;
   SGcOperatorParam* pGcParam = pParam->value;
-  SGcSessionCtx* pSession = taosHashGet(pGCache->pSessionHash, &pGcParam->sessionId, sizeof(pGcParam->sessionId));
+  SGcDownstreamCtx* pCtx = &pGCache->pDownstreams[pParam->downstreamIdx];
+  SGcSessionCtx* pSession = taosHashGet(pCtx->pSessions, &pGcParam->sessionId, sizeof(pGcParam->sessionId));
   if (NULL == pSession) {
     int32_t code = initGroupCacheSession(pOperator, pParam, &pSession);
     if (TSDB_CODE_SUCCESS != code) {
       return code;
     }
+  } else if (pGCache->enableCache) {
+    SSDataBlock** ppBlock = taosHashGet(pGCache->blkCache.pReadBlk, &pGcParam->sessionId, sizeof(pGcParam->sessionId));
+    if (ppBlock) {
+      releaseBaseBlockToList(pCtx, *ppBlock);
+      taosHashRemove(pGCache->blkCache.pReadBlk, &pGcParam->sessionId, sizeof(pGcParam->sessionId));
+    }
   }
   
-  return getBlkFromSessionCacheImpl(pOperator, pGcParam->sessionId, pSession, ppRes);
-}
+  code = getBlkFromSessionCacheImpl(pOperator, pGcParam->sessionId, pSession, ppRes);
+  if (NULL == ppRes) {
+    taosHashRemove(pCtx->pSessions, &pGcParam->sessionId, sizeof(pGcParam->sessionId));
+  }
 
-static FORCE_INLINE void destroyCurrentGroupCacheSession(SGroupCacheOperatorInfo* pGCache, SGcSessionCtx** ppCurrent, int64_t* pCurrentId) {
-  if (NULL == *ppCurrent) {
-    return;
-  }
-  if (taosHashRemove(pGCache->pSessionHash, pCurrentId, sizeof(*pCurrentId))) {
-    qError("remove session %" PRIx64 " failed", *pCurrentId);
-  }
-  
-  *ppCurrent = NULL;
-  *pCurrentId = 0;
+  return code;
 }
 
 static int32_t initGroupCacheExecInfo(SOperatorInfo*        pOperator) {
@@ -690,7 +714,7 @@ static int32_t initGroupCacheExecInfo(SOperatorInfo*        pOperator) {
 
 static int32_t initGroupCacheDownstreamCtx(SOperatorInfo*          pOperator) {
   SGroupCacheOperatorInfo* pInfo = pOperator->info;
-  pInfo->pDownstreams = taosMemoryMalloc(pOperator->numOfDownstream * sizeof(*pInfo->pDownstreams));
+  pInfo->pDownstreams = taosMemoryCalloc(pOperator->numOfDownstream, sizeof(*pInfo->pDownstreams));
   if (NULL == pInfo->pDownstreams) {
     return TSDB_CODE_OUT_OF_MEMORY;
   }
@@ -713,11 +737,21 @@ static int32_t initGroupCacheDownstreamCtx(SOperatorInfo*          pOperator) {
         return TSDB_CODE_OUT_OF_MEMORY;
       }
     }
-    
+
+    pInfo->pDownstreams[i].pSessions = taosHashInit(20, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BIGINT), false, HASH_ENTRY_LOCK);
+    if (pInfo->pDownstreams[i].pSessions == NULL) {
+      return TSDB_CODE_OUT_OF_MEMORY;
+    }
+  
     pInfo->pDownstreams[i].pFreeBlock = taosArrayInit(10, POINTER_BYTES);
     if (NULL == pInfo->pDownstreams[i].pFreeBlock) {
       return TSDB_CODE_OUT_OF_MEMORY;
     }
+    
+    pInfo->pDownstreams[i].pWaitSessions = taosHashInit(20, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BIGINT), false, HASH_ENTRY_LOCK);
+    if (pInfo->pDownstreams[i].pWaitSessions == NULL) {
+      return TSDB_CODE_OUT_OF_MEMORY;
+    }
   }
 
   return TSDB_CODE_SUCCESS;
@@ -754,6 +788,7 @@ SOperatorInfo* createGroupCacheOperatorInfo(SOperatorInfo** pDownstream, int32_t
   pInfo->maxCacheSize = -1;
   pInfo->grpByUid = pPhyciNode->grpByUid;
   pInfo->globalGrp = pPhyciNode->globalGrp;
+  pInfo->enableCache = pPhyciNode->enableCache;
   
   if (!pInfo->grpByUid) {
     qError("only group cache by uid is supported now");
@@ -781,12 +816,6 @@ SOperatorInfo* createGroupCacheOperatorInfo(SOperatorInfo** pDownstream, int32_t
     }
   }
 
-  pInfo->pSessionHash = taosHashInit(20, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BIGINT), false, HASH_ENTRY_LOCK);
-  if (pInfo->pSessionHash == NULL) {
-    code = TSDB_CODE_OUT_OF_MEMORY;
-    goto _error;
-  }
-
   code = appendDownstream(pOperator, pDownstream, numOfDownstream);
   if (TSDB_CODE_SUCCESS != code) {
     goto _error;
diff --git a/source/libs/executor/src/mergejoinoperator.c b/source/libs/executor/src/mergejoinoperator.c
index b243c225f9..9eeb51a21c 100644
--- a/source/libs/executor/src/mergejoinoperator.c
+++ b/source/libs/executor/src/mergejoinoperator.c
@@ -642,6 +642,12 @@ static int32_t mergeJoinJoinDownstreamTsRanges(SOperatorInfo* pOperator, int64_t
   return TSDB_CODE_SUCCESS;
 }
 
+static void setMergeJoinDone(SOperatorInfo* pOperator) {
+  pOperator->status = OP_EXEC_DONE;
+  pOperator->pDownstreamParams[0] = NULL;
+  pOperator->pDownstreamParams[1] = NULL;
+}
+
 static bool mergeJoinGetNextTimestamp(SOperatorInfo* pOperator, int64_t* pLeftTs, int64_t* pRightTs) {
   SMJoinOperatorInfo* pJoinInfo = pOperator->info;
 
@@ -651,7 +657,7 @@ static bool mergeJoinGetNextTimestamp(SOperatorInfo* pOperator, int64_t* pLeftTs
     pJoinInfo->leftPos = 0;
     if (pJoinInfo->pLeft == NULL) {
       qDebug("merge join left got empty block");
-      setTaskStatus(pOperator->pTaskInfo, TASK_COMPLETED);
+      setMergeJoinDone(pOperator);
       return false;
     } else {
       qDebug("merge join left got block");
@@ -664,7 +670,7 @@ static bool mergeJoinGetNextTimestamp(SOperatorInfo* pOperator, int64_t* pLeftTs
     pJoinInfo->rightPos = 0;
     if (pJoinInfo->pRight == NULL) {
       qDebug("merge join right got empty block");
-      setTaskStatus(pOperator->pTaskInfo, TASK_COMPLETED);
+      setMergeJoinDone(pOperator);
       return false;
     } else {
       qDebug("merge join right got block");
@@ -729,6 +735,9 @@ static void doMergeJoinImpl(struct SOperatorInfo* pOperator, SSDataBlock* pRes)
 
 SSDataBlock* doMergeJoin(struct SOperatorInfo* pOperator) {
   SMJoinOperatorInfo* pJoinInfo = pOperator->info;
+  if (pOperator->status == OP_EXEC_DONE && (NULL == pOperator->pDownstreamParams[0] || NULL == pOperator->pDownstreamParams[1])) {
+    return NULL;
+  }
 
   SSDataBlock* pRes = pJoinInfo->pRes;
   blockDataCleanup(pRes);
@@ -746,6 +755,9 @@ SSDataBlock* doMergeJoin(struct SOperatorInfo* pOperator) {
     if (pRes->info.rows >= pOperator->resultInfo.threshold) {
       break;
     }
+    if (pOperator->status == OP_EXEC_DONE) {
+      break;
+    }
   }
   return (pRes->info.rows > 0) ? pRes : NULL;
 }
diff --git a/source/libs/executor/src/scanoperator.c b/source/libs/executor/src/scanoperator.c
index 44fa04d922..46db8b6197 100644
--- a/source/libs/executor/src/scanoperator.c
+++ b/source/libs/executor/src/scanoperator.c
@@ -799,8 +799,7 @@ static int32_t createTableListInfoFromParam(SOperatorInfo* pOperator) {
   
   qDebug("add total %d dynamic tables to scan", num);
 
-  taosArrayClear(pListInfo->pTableList);
-  taosHashClear(pListInfo->map);
+  pListInfo->oneTableForEachGroup = true;
   
   for (int32_t i = 0; i < num; ++i) {
     uint64_t* pUid = taosArrayGet(pParam->pUidList, i);
@@ -838,6 +837,10 @@ static SSDataBlock* startNextGroupScan(SOperatorInfo* pOperator) {
   
   SSDataBlock* result = doGroupedTableScan(pOperator);
   if (result != NULL) {
+    if (pInfo->base.pTableListInfo->oneTableForEachGroup) {
+      STableKeyInfo* pKeyInfo = (STableKeyInfo*)tableListGetInfo(pInfo->base.pTableListInfo, pInfo->currentGroupId);
+      result->info.id.groupId = pKeyInfo->uid;
+    }
     return result;
   }
   
@@ -851,14 +854,14 @@ static SSDataBlock* doTableScan(SOperatorInfo* pOperator) {
   SStorageAPI*    pAPI = &pTaskInfo->storageAPI;
 
   if (pOperator->pOperatorParam) {
+    pOperator->dynamicTask = true;
     int32_t code = createTableListInfoFromParam(pOperator);
     pOperator->pOperatorParam = NULL;
     if (code != TSDB_CODE_SUCCESS) {
       pTaskInfo->code = code;
       T_LONG_JMP(pTaskInfo->env, code);
     }
-    
-    if (pInfo->currentGroupId != -1) {
+    if (pOperator->status == OP_EXEC_DONE) {
       pInfo->currentGroupId = 0;
       return startNextGroupScan(pOperator);
     }
@@ -922,11 +925,19 @@ static SSDataBlock* doTableScan(SOperatorInfo* pOperator) {
 
     SSDataBlock* result = doGroupedTableScan(pOperator);
     if (result != NULL) {
+      if (pInfo->base.pTableListInfo->oneTableForEachGroup) {
+        STableKeyInfo* pKeyInfo = (STableKeyInfo*)tableListGetInfo(pInfo->base.pTableListInfo, pInfo->currentGroupId);
+        result->info.id.groupId = pKeyInfo->uid;
+      }
       return result;
     }
 
     if ((++pInfo->currentGroupId) >= tableListGetOutputGroups(pInfo->base.pTableListInfo)) {
       setOperatorCompleted(pOperator);
+      if (pOperator->dynamicTask) {
+        taosArrayClear(pInfo->base.pTableListInfo->pTableList);
+        taosHashClear(pInfo->base.pTableListInfo->map);
+      }
       return NULL;
     }
 
diff --git a/source/libs/nodes/src/nodesCloneFuncs.c b/source/libs/nodes/src/nodesCloneFuncs.c
index e16f16d954..68a7b06814 100644
--- a/source/libs/nodes/src/nodesCloneFuncs.c
+++ b/source/libs/nodes/src/nodesCloneFuncs.c
@@ -537,6 +537,10 @@ static int32_t logicInterpFuncCopy(const SInterpFuncLogicNode* pSrc, SInterpFunc
 
 static int32_t logicGroupCacheCopy(const SGroupCacheLogicNode* pSrc, SGroupCacheLogicNode* pDst) {
   COPY_BASE_OBJECT_FIELD(node, logicNodeCopy);
+  COPY_SCALAR_FIELD(grpColsMayBeNull);
+  COPY_SCALAR_FIELD(grpByUid);
+  COPY_SCALAR_FIELD(globalGrp);
+  COPY_SCALAR_FIELD(enableCache);
   CLONE_NODE_LIST_FIELD(pGroupCols);
   return TSDB_CODE_SUCCESS;
 }
diff --git a/source/libs/nodes/src/nodesCodeFuncs.c b/source/libs/nodes/src/nodesCodeFuncs.c
index ef3181f412..b48745ab43 100644
--- a/source/libs/nodes/src/nodesCodeFuncs.c
+++ b/source/libs/nodes/src/nodesCodeFuncs.c
@@ -1185,6 +1185,7 @@ static int32_t jsonToLogicInterpFuncNode(const SJson* pJson, void* pObj) {
 static const char* jkGroupCacheLogicPlanGrpColsMayBeNull = "GroupColsMayBeNull";
 static const char* jkGroupCacheLogicPlanGroupByUid = "GroupByUid";
 static const char* jkGroupCacheLogicPlanGlobalGroup = "GlobalGroup";
+static const char* jkGroupCacheLogicPlanEnableCache = "EnableCache";
 static const char* jkGroupCacheLogicPlanGroupCols = "GroupCols";
 
 static int32_t logicGroupCacheNodeToJson(const void* pObj, SJson* pJson) {
@@ -1200,6 +1201,9 @@ static int32_t logicGroupCacheNodeToJson(const void* pObj, SJson* pJson) {
   if (TSDB_CODE_SUCCESS == code) {
     code = tjsonAddBoolToObject(pJson, jkGroupCacheLogicPlanGlobalGroup, pNode->globalGrp);
   }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonAddBoolToObject(pJson, jkGroupCacheLogicPlanEnableCache, pNode->enableCache);
+  }
   if (TSDB_CODE_SUCCESS == code) {
     code = nodeListToJson(pJson, jkGroupCacheLogicPlanGroupCols, pNode->pGroupCols);
   }
@@ -1220,6 +1224,9 @@ static int32_t jsonToLogicGroupCacheNode(const SJson* pJson, void* pObj) {
   if (TSDB_CODE_SUCCESS == code) {
     code = tjsonGetBoolValue(pJson, jkGroupCacheLogicPlanGlobalGroup, &pNode->globalGrp);
   }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonGetBoolValue(pJson, jkGroupCacheLogicPlanEnableCache, &pNode->enableCache);
+  }
   if (TSDB_CODE_SUCCESS == code) {
     code = jsonToNodeList(pJson, jkGroupCacheLogicPlanGroupCols, &pNode->pGroupCols);
   }
@@ -2929,6 +2936,7 @@ static const char* jkGroupCachePhysiPlanGroupCols = "GroupColumns";
 static const char* jkGroupCachePhysiPlanGrpColsMayBeNull = "GroupColumnsMayBeNull";
 static const char* jkGroupCachePhysiPlanGroupByUid = "GroupByUid";
 static const char* jkGroupCachePhysiPlanGlobalGroup = "GlobalGroup";
+static const char* jkGroupCachePhysiPlanEnableCache = "EnableCache";
 
 
 static int32_t physiGroupCacheNodeToJson(const void* pObj, SJson* pJson) {
@@ -2944,6 +2952,9 @@ static int32_t physiGroupCacheNodeToJson(const void* pObj, SJson* pJson) {
   if (TSDB_CODE_SUCCESS == code) {
     code = tjsonAddBoolToObject(pJson, jkGroupCachePhysiPlanGlobalGroup, pNode->globalGrp);
   }  
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonAddBoolToObject(pJson, jkGroupCachePhysiPlanEnableCache, pNode->enableCache);
+  }  
   if (TSDB_CODE_SUCCESS == code) {
     code = nodeListToJson(pJson, jkGroupCachePhysiPlanGroupCols, pNode->pGroupCols);
   }
@@ -2963,6 +2974,9 @@ static int32_t jsonToPhysiGroupCacheNode(const SJson* pJson, void* pObj) {
   if (TSDB_CODE_SUCCESS == code) {
     code = tjsonGetBoolValue(pJson, jkGroupCachePhysiPlanGlobalGroup, &pNode->globalGrp);
   }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonGetBoolValue(pJson, jkGroupCachePhysiPlanEnableCache, &pNode->enableCache);
+  }
   if (TSDB_CODE_SUCCESS == code) {
     code = jsonToNodeList(pJson, jkGroupCachePhysiPlanGroupCols, &pNode->pGroupCols);
   }
diff --git a/source/libs/nodes/src/nodesMsgFuncs.c b/source/libs/nodes/src/nodesMsgFuncs.c
index 6648186b4d..34a0ace0ef 100644
--- a/source/libs/nodes/src/nodesMsgFuncs.c
+++ b/source/libs/nodes/src/nodesMsgFuncs.c
@@ -3530,6 +3530,7 @@ enum {
   PHY_GROUP_CACHE_CODE_GROUP_COLS_MAY_BE_NULL,
   PHY_GROUP_CACHE_CODE_GROUP_BY_UID,
   PHY_GROUP_CACHE_CODE_GLOBAL_GROUP,
+  PHY_GROUP_CACHE_CODE_ENABLE_CACHE,
   PHY_GROUP_CACHE_CODE_GROUP_COLUMNS
 };
 
@@ -3549,6 +3550,9 @@ static int32_t physiGroupCacheNodeToMsg(const void* pObj, STlvEncoder* pEncoder)
   if (TSDB_CODE_SUCCESS == code) {
     code = tlvEncodeBool(pEncoder, PHY_GROUP_CACHE_CODE_GLOBAL_GROUP, pNode->globalGrp);
   }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tlvEncodeBool(pEncoder, PHY_GROUP_CACHE_CODE_ENABLE_CACHE, pNode->enableCache);
+  }
 
   return code;
 }
@@ -3575,6 +3579,9 @@ static int32_t msgToPhysiGroupCacheNode(STlvDecoder* pDecoder, void* pObj) {
       case PHY_GROUP_CACHE_CODE_GLOBAL_GROUP:
         code = tlvDecodeBool(pTlv, &pNode->globalGrp);
         break;    
+      case PHY_GROUP_CACHE_CODE_ENABLE_CACHE:
+        code = tlvDecodeBool(pTlv, &pNode->enableCache);
+        break;    
       default:
         break;
     }
diff --git a/source/libs/planner/src/planOptimizer.c b/source/libs/planner/src/planOptimizer.c
index a259ceb98f..da7f3d2737 100644
--- a/source/libs/planner/src/planOptimizer.c
+++ b/source/libs/planner/src/planOptimizer.c
@@ -3263,7 +3263,8 @@ static int32_t stbJoinOptCreateGroupCacheNode(SNodeList* pChildren, SLogicNode**
     pScan->node.pParent = (SLogicNode*)pGrpCache;
   }
   pGrpCache->globalGrp = !hasCond;
-
+  pGrpCache->enableCache = pGrpCache->globalGrp;
+  
   if (TSDB_CODE_SUCCESS == code) {
     *ppLogic = (SLogicNode*)pGrpCache;
   } else {
diff --git a/source/libs/planner/src/planPhysiCreater.c b/source/libs/planner/src/planPhysiCreater.c
index ff0f90498f..61843f91c8 100644
--- a/source/libs/planner/src/planPhysiCreater.c
+++ b/source/libs/planner/src/planPhysiCreater.c
@@ -988,6 +988,7 @@ static int32_t createGroupCachePhysiNode(SPhysiPlanContext* pCxt, SNodeList* pCh
   pGrpCache->grpColsMayBeNull = pLogicNode->grpColsMayBeNull;
   pGrpCache->grpByUid = pLogicNode->grpByUid;
   pGrpCache->globalGrp = pLogicNode->globalGrp;
+  pGrpCache->enableCache = pLogicNode->enableCache;
   SDataBlockDescNode* pChildDesc = ((SPhysiNode*)nodesListGetNode(pChildren, 0))->pOutputDataBlockDesc;
   int32_t             code = TSDB_CODE_SUCCESS;
   if (TSDB_CODE_SUCCESS == code) {