diff --git a/include/libs/stream/tstream.h b/include/libs/stream/tstream.h
index 404d81465b..103ca6a4f0 100644
--- a/include/libs/stream/tstream.h
+++ b/include/libs/stream/tstream.h
@@ -66,6 +66,25 @@ enum {
   TASK_OUTPUT_STATUS__BLOCKED,
 };
 
+enum {
+  TASK_TRIGGER_STATUS__INACTIVE = 1,
+  TASK_TRIGGER_STATUS__ACTIVE,
+};
+
+enum {
+  TASK_LEVEL__SOURCE = 1,
+  TASK_LEVEL__AGG,
+  TASK_LEVEL__SINK,
+};
+
+enum {
+  TASK_OUTPUT__FIXED_DISPATCH = 1,
+  TASK_OUTPUT__SHUFFLE_DISPATCH,
+  TASK_OUTPUT__TABLE,
+  TASK_OUTPUT__SMA,
+  TASK_OUTPUT__FETCH,
+};
+
 typedef struct {
   int8_t type;
 } SStreamQueueItem;
@@ -202,29 +221,6 @@ typedef struct {
   int8_t reserved;
 } STaskSinkFetch;
 
-enum {
-  TASK_EXEC__NONE = 1,
-  TASK_EXEC__PIPE,
-};
-
-enum {
-  TASK_DISPATCH__NONE = 1,
-  TASK_DISPATCH__FIXED,
-  TASK_DISPATCH__SHUFFLE,
-};
-
-enum {
-  TASK_SINK__NONE = 1,
-  TASK_SINK__TABLE,
-  TASK_SINK__SMA,
-  TASK_SINK__FETCH,
-};
-
-enum {
-  TASK_TRIGGER_STATUS__IN_ACTIVE = 1,
-  TASK_TRIGGER_STATUS__ACTIVE,
-};
-
 typedef struct {
   int32_t nodeId;
   int32_t childId;
@@ -237,11 +233,8 @@ typedef struct {
 typedef struct SStreamTask {
   int64_t streamId;
   int32_t taskId;
-  int8_t  isDataScan;
-  int8_t  execType;
-  int8_t  sinkType;
-  int8_t  dispatchType;
-  int8_t  isStreamDistributed;
+  int8_t  taskLevel;
+  int8_t  outputType;
   int16_t dispatchMsgType;
 
   int8_t taskStatus;
@@ -252,13 +245,12 @@ typedef struct SStreamTask {
   int32_t nodeId;
   SEpSet  epSet;
 
-  // used for semi or single task,
-  // while final task should have processedVer for each child
+  // used for task source and sink,
+  // while task agg should have processedVer for each child
   int64_t recoverSnapVer;
   int64_t startVer;
   int64_t checkpointVer;
   int64_t processedVer;
-  // int32_t numOfVgroups;
 
   // children info
   SArray* childEpInfo;  // SArray<SStreamChildEpInfo*>
@@ -266,19 +258,13 @@ typedef struct SStreamTask {
   // exec
   STaskExec exec;
 
-  // TODO: unify sink and dispatch
-
-  //  local sink
-  union {
-    STaskSinkTb    tbSink;
-    STaskSinkSma   smaSink;
-    STaskSinkFetch fetchSink;
-  };
-
-  // remote dispatcher
+  // output
   union {
     STaskDispatcherFixedEp fixedEpDispatcher;
     STaskDispatcherShuffle shuffleDispatcher;
+    STaskSinkTb            tbSink;
+    STaskSinkSma           smaSink;
+    STaskSinkFetch         fetchSink;
   };
 
   int8_t inputStatus;
@@ -292,9 +278,6 @@ typedef struct SStreamTask {
   int64_t triggerParam;
   void*   timer;
 
-  // application storage
-  // void* ahandle;
-
   // msg handle
   SMsgCb* pMsgCb;
 } SStreamTask;
@@ -331,7 +314,7 @@ static FORCE_INLINE int32_t streamTaskInput(SStreamTask* pTask, SStreamQueueItem
   }
 
   if (pItem->type != STREAM_INPUT__GET_RES && pItem->type != STREAM_INPUT__CHECKPOINT && pTask->triggerParam != 0) {
-    atomic_val_compare_exchange_8(&pTask->triggerStatus, TASK_TRIGGER_STATUS__IN_ACTIVE, TASK_TRIGGER_STATUS__ACTIVE);
+    atomic_val_compare_exchange_8(&pTask->triggerStatus, TASK_TRIGGER_STATUS__INACTIVE, TASK_TRIGGER_STATUS__ACTIVE);
   }
 
 #if 0
@@ -346,18 +329,15 @@ static FORCE_INLINE void streamTaskInputFail(SStreamTask* pTask) {
 }
 
 static FORCE_INLINE int32_t streamTaskOutput(SStreamTask* pTask, SStreamDataBlock* pBlock) {
-  if (pTask->sinkType == TASK_SINK__TABLE) {
-    ASSERT(pTask->dispatchType == TASK_DISPATCH__NONE);
+  if (pTask->outputType == TASK_OUTPUT__TABLE) {
     pTask->tbSink.tbSinkFunc(pTask, pTask->tbSink.vnode, 0, pBlock->blocks);
     taosArrayDestroyEx(pBlock->blocks, (FDelete)blockDataFreeRes);
     taosFreeQitem(pBlock);
-  } else if (pTask->sinkType == TASK_SINK__SMA) {
-    ASSERT(pTask->dispatchType == TASK_DISPATCH__NONE);
+  } else if (pTask->outputType == TASK_OUTPUT__SMA) {
     pTask->smaSink.smaSink(pTask->smaSink.vnode, pTask->smaSink.smaId, pBlock->blocks);
     taosArrayDestroyEx(pBlock->blocks, (FDelete)blockDataFreeRes);
     taosFreeQitem(pBlock);
   } else {
-    ASSERT(pTask->dispatchType != TASK_DISPATCH__NONE);
     taosWriteQitem(pTask->outputQueue->queue, pBlock);
   }
   return 0;
diff --git a/source/dnode/mnode/impl/src/mndScheduler.c b/source/dnode/mnode/impl/src/mndScheduler.c
index 9d7fa537bb..218f82df18 100644
--- a/source/dnode/mnode/impl/src/mndScheduler.c
+++ b/source/dnode/mnode/impl/src/mndScheduler.c
@@ -98,13 +98,11 @@ END:
 }
 
 int32_t mndAddSinkToTask(SMnode* pMnode, SStreamObj* pStream, SStreamTask* pTask) {
-  pTask->dispatchType = TASK_DISPATCH__NONE;
-  // sink
   if (pStream->smaId != 0) {
-    pTask->sinkType = TASK_SINK__SMA;
+    pTask->outputType = TASK_OUTPUT__SMA;
     pTask->smaSink.smaId = pStream->smaId;
   } else {
-    pTask->sinkType = TASK_SINK__TABLE;
+    pTask->outputType = TASK_OUTPUT__TABLE;
     pTask->tbSink.stbUid = pStream->targetStbUid;
     memcpy(pTask->tbSink.stbFullName, pStream->targetSTbName, TSDB_TABLE_FNAME_LEN);
     pTask->tbSink.pSchemaWrapper = tCloneSSchemaWrapper(&pStream->outputSchema);
@@ -113,8 +111,6 @@ int32_t mndAddSinkToTask(SMnode* pMnode, SStreamObj* pStream, SStreamTask* pTask
 }
 
 int32_t mndAddDispatcherToInnerTask(SMnode* pMnode, SStreamObj* pStream, SStreamTask* pTask) {
-  pTask->sinkType = TASK_SINK__NONE;
-
   bool isShuffle = false;
 
   if (pStream->fixedSinkVgId == 0) {
@@ -122,7 +118,7 @@ int32_t mndAddDispatcherToInnerTask(SMnode* pMnode, SStreamObj* pStream, SStream
     ASSERT(pDb);
     if (pDb->cfg.numOfVgroups > 1) {
       isShuffle = true;
-      pTask->dispatchType = TASK_DISPATCH__SHUFFLE;
+      pTask->outputType = TASK_OUTPUT__SHUFFLE_DISPATCH;
       pTask->dispatchMsgType = TDMT_STREAM_TASK_DISPATCH;
       if (mndExtractDbInfo(pMnode, pDb, &pTask->shuffleDispatcher.dbInfo, NULL) < 0) {
         ASSERT(0);
@@ -152,7 +148,7 @@ int32_t mndAddDispatcherToInnerTask(SMnode* pMnode, SStreamObj* pStream, SStream
       }
     }
   } else {
-    pTask->dispatchType = TASK_DISPATCH__FIXED;
+    pTask->outputType = TASK_OUTPUT__FIXED_DISPATCH;
     pTask->dispatchMsgType = TDMT_STREAM_TASK_DISPATCH;
     SArray* pArray = taosArrayGetP(pStream->tasks, 0);
     // one sink only
@@ -178,7 +174,6 @@ int32_t mndAssignTaskToVg(SMnode* pMnode, SStreamTask* pTask, SSubplan* plan, co
     terrno = TSDB_CODE_QRY_INVALID_INPUT;
     return -1;
   }
-  ASSERT(pTask->dispatchType != TASK_DISPATCH__NONE || pTask->sinkType != TASK_SINK__NONE);
   return 0;
 }
 
@@ -249,26 +244,20 @@ int32_t mndAddShuffleSinkTasksToStream(SMnode* pMnode, SStreamObj* pStream) {
     pTask->nodeId = pVgroup->vgId;
     pTask->epSet = mndGetVgroupEpset(pMnode, pVgroup);
 
-    // source
-    pTask->isDataScan = 0;
-
-    // exec
-    pTask->execType = TASK_EXEC__NONE;
+    // type
+    pTask->taskLevel = TASK_LEVEL__SINK;
 
     // sink
     if (pStream->smaId != 0) {
-      pTask->sinkType = TASK_SINK__SMA;
+      pTask->outputType = TASK_OUTPUT__SMA;
       pTask->smaSink.smaId = pStream->smaId;
     } else {
-      pTask->sinkType = TASK_SINK__TABLE;
+      pTask->outputType = TASK_OUTPUT__TABLE;
       pTask->tbSink.stbUid = pStream->targetStbUid;
       memcpy(pTask->tbSink.stbFullName, pStream->targetSTbName, TSDB_TABLE_FNAME_LEN);
       pTask->tbSink.pSchemaWrapper = tCloneSSchemaWrapper(&pStream->outputSchema);
       ASSERT(pTask->tbSink.pSchemaWrapper);
     }
-
-    // dispatch
-    pTask->dispatchType = TASK_DISPATCH__NONE;
   }
   return 0;
 }
@@ -295,25 +284,19 @@ int32_t mndAddFixedSinkTaskToStream(SMnode* pMnode, SStreamObj* pStream) {
 #endif
   pTask->epSet = mndGetVgroupEpset(pMnode, &pStream->fixedSinkVg);
 
-  // source
-  pTask->isDataScan = 0;
-
-  // exec
-  pTask->execType = TASK_EXEC__NONE;
+  pTask->taskLevel = TASK_LEVEL__SINK;
 
   // sink
   if (pStream->smaId != 0) {
-    pTask->sinkType = TASK_SINK__SMA;
+    pTask->outputType = TASK_OUTPUT__SMA;
     pTask->smaSink.smaId = pStream->smaId;
   } else {
-    pTask->sinkType = TASK_SINK__TABLE;
+    pTask->outputType = TASK_OUTPUT__TABLE;
     pTask->tbSink.stbUid = pStream->targetStbUid;
     memcpy(pTask->tbSink.stbFullName, pStream->targetSTbName, TSDB_TABLE_FNAME_LEN);
     pTask->tbSink.pSchemaWrapper = tCloneSSchemaWrapper(&pStream->outputSchema);
   }
 
-  // dispatch
-  pTask->dispatchType = TASK_DISPATCH__NONE;
   return 0;
 }
 
@@ -338,6 +321,7 @@ int32_t mndScheduleStream(SMnode* pMnode, SStreamObj* pStream) {
   bool multiTarget = pDbObj->cfg.numOfVgroups > 1;
 
   if (totLevel == 2 || externalTargetDB || multiTarget) {
+    /*if (true) {*/
     SArray* taskOneLevel = taosArrayInit(0, sizeof(void*));
     taosArrayPush(pStream->tasks, &taskOneLevel);
     // add extra sink
@@ -376,8 +360,7 @@ int32_t mndScheduleStream(SMnode* pMnode, SStreamObj* pStream) {
 
       pInnerTask->childEpInfo = taosArrayInit(0, sizeof(void*));
 
-      // source
-      pInnerTask->isDataScan = 0;
+      pInnerTask->taskLevel = TASK_LEVEL__AGG;
 
       // trigger
       pInnerTask->triggerParam = pStream->triggerParam;
@@ -388,9 +371,6 @@ int32_t mndScheduleStream(SMnode* pMnode, SStreamObj* pStream) {
         return -1;
       }
 
-      // exec
-      pInnerTask->execType = TASK_EXEC__PIPE;
-
 #if 0
       SDbObj* pSourceDb = mndAcquireDb(pMnode, pStream->sourceDb);
       ASSERT(pDbObj != NULL);
@@ -452,19 +432,16 @@ int32_t mndScheduleStream(SMnode* pMnode, SStreamObj* pStream) {
       mndAddTaskToTaskSet(taskSourceLevel, pTask);
 
       // source
-      pTask->isDataScan = 1;
+      pTask->taskLevel = TASK_LEVEL__SOURCE;
 
       // add fixed vg dispatch
-      pTask->sinkType = TASK_SINK__NONE;
       pTask->dispatchMsgType = TDMT_STREAM_TASK_DISPATCH;
-      pTask->dispatchType = TASK_DISPATCH__FIXED;
+      pTask->outputType = TASK_OUTPUT__FIXED_DISPATCH;
 
       pTask->fixedEpDispatcher.taskId = pInnerTask->taskId;
       pTask->fixedEpDispatcher.nodeId = pInnerTask->nodeId;
       pTask->fixedEpDispatcher.epSet = pInnerTask->epSet;
 
-      // exec
-      pTask->execType = TASK_EXEC__PIPE;
       if (mndAssignTaskToVg(pMnode, pTask, plan, pVgroup) < 0) {
         sdbRelease(pSdb, pVgroup);
         qDestroyQueryPlan(pPlan);
@@ -515,7 +492,7 @@ int32_t mndScheduleStream(SMnode* pMnode, SStreamObj* pStream) {
       mndAddTaskToTaskSet(taskOneLevel, pTask);
 
       // source
-      pTask->isDataScan = 1;
+      pTask->taskLevel = TASK_LEVEL__SOURCE;
 
       // trigger
       pTask->triggerParam = pStream->triggerParam;
@@ -527,8 +504,6 @@ int32_t mndScheduleStream(SMnode* pMnode, SStreamObj* pStream) {
         mndAddSinkToTask(pMnode, pStream, pTask);
       }
 
-      // exec
-      pTask->execType = TASK_EXEC__PIPE;
       if (mndAssignTaskToVg(pMnode, pTask, plan, pVgroup) < 0) {
         sdbRelease(pSdb, pVgroup);
         qDestroyQueryPlan(pPlan);
diff --git a/source/dnode/mnode/impl/src/mndStream.c b/source/dnode/mnode/impl/src/mndStream.c
index b8501db9fb..902879701c 100644
--- a/source/dnode/mnode/impl/src/mndStream.c
+++ b/source/dnode/mnode/impl/src/mndStream.c
@@ -323,8 +323,7 @@ FAIL:
 }
 
 int32_t mndPersistTaskDeployReq(STrans *pTrans, const SStreamTask *pTask) {
-  ASSERT(pTask->isDataScan == 0 || pTask->isDataScan == 1);
-  if (pTask->isDataScan == 0 && pTask->sinkType == TASK_SINK__NONE) {
+  if (pTask->taskLevel == TASK_LEVEL__AGG) {
     ASSERT(taosArrayGetSize(pTask->childEpInfo) != 0);
   }
   SEncoder encoder;
@@ -548,7 +547,7 @@ int32_t mndRecoverStreamTasks(SMnode *pMnode, STrans *pTrans, SStreamObj *pStrea
       SArray      *pTasks = taosArrayGetP(pStream->tasks, i);
       int32_t      sz = taosArrayGetSize(pTasks);
       SStreamTask *pTask = taosArrayGetP(pTasks, 0);
-      if (!pTask->isDataScan && pTask->execType != TASK_EXEC__NONE) {
+      if (pTask->taskLevel == TASK_LEVEL__AGG) {
         ASSERT(sz == 1);
         if (mndPersistTaskRecoverReq(pTrans, pTask) < 0) {
           return -1;
@@ -564,8 +563,8 @@ int32_t mndRecoverStreamTasks(SMnode *pMnode, STrans *pTrans, SStreamObj *pStrea
       int32_t sz = taosArrayGetSize(pTasks);
       for (int32_t j = 0; j < sz; j++) {
         SStreamTask *pTask = taosArrayGetP(pTasks, j);
-        if (!pTask->isDataScan) break;
-        ASSERT(pTask->execType != TASK_EXEC__NONE);
+        if (pTask->taskLevel != TASK_LEVEL__SOURCE) break;
+        ASSERT(pTask->taskLevel != TASK_LEVEL__SINK);
         if (mndPersistTaskRecoverReq(pTrans, pTask) < 0) {
           return -1;
         }
diff --git a/source/dnode/snode/src/snode.c b/source/dnode/snode/src/snode.c
index 2561031bac..cda4663285 100644
--- a/source/dnode/snode/src/snode.c
+++ b/source/dnode/snode/src/snode.c
@@ -110,9 +110,6 @@ static int32_t sndProcessTaskDeployReq(SSnode *pNode, SRpcMsg *pMsg) {
 
   pTask->pMsgCb = &pNode->msgCb;
 
-  ASSERT(pTask->execType != TASK_EXEC__NONE);
-
-  ASSERT(pTask->isDataScan == 0);
   pTask->exec.executor = qCreateStreamExecTaskInfo(pTask->exec.qmsg, NULL);
   ASSERT(pTask->exec.executor);
 
diff --git a/source/dnode/vnode/src/tq/tq.c b/source/dnode/vnode/src/tq/tq.c
index 84a1191ef3..62e37f048e 100644
--- a/source/dnode/vnode/src/tq/tq.c
+++ b/source/dnode/vnode/src/tq/tq.c
@@ -604,8 +604,8 @@ int32_t tqProcessVgChangeReq(STQ* pTq, char* msg, int32_t msgLen) {
 
 int32_t tqExpandTask(STQ* pTq, SStreamTask* pTask) {
   int32_t code = 0;
-  ASSERT(pTask->isDataScan == 0 || pTask->isDataScan == 1);
-  if (pTask->isDataScan == 0 && pTask->sinkType == TASK_SINK__NONE) {
+
+  if (pTask->taskLevel == TASK_LEVEL__AGG) {
     ASSERT(taosArrayGetSize(pTask->childEpInfo) != 0);
   }
 
@@ -624,32 +624,30 @@ int32_t tqExpandTask(STQ* pTq, SStreamTask* pTask) {
 
   pTask->pMsgCb = &pTq->pVnode->msgCb;
 
-  // exec
-  if (pTask->execType != TASK_EXEC__NONE) {
-    // expand runners
-    if (pTask->isDataScan) {
-      SReadHandle handle = {
-          .meta = pTq->pVnode->pMeta,
-          .vnode = pTq->pVnode,
-          .initTqReader = 1,
-      };
-      pTask->exec.executor = qCreateStreamExecTaskInfo(pTask->exec.qmsg, &handle);
-    } else {
-      SReadHandle mgHandle = {
-          .vnode = NULL,
-          .numOfVgroups = (int32_t)taosArrayGetSize(pTask->childEpInfo),
-      };
-      pTask->exec.executor = qCreateStreamExecTaskInfo(pTask->exec.qmsg, &mgHandle);
-    }
+  // expand executor
+  if (pTask->taskLevel == TASK_LEVEL__SOURCE) {
+    SReadHandle handle = {
+        .meta = pTq->pVnode->pMeta,
+        .vnode = pTq->pVnode,
+        .initTqReader = 1,
+    };
+    pTask->exec.executor = qCreateStreamExecTaskInfo(pTask->exec.qmsg, &handle);
+    ASSERT(pTask->exec.executor);
+  } else if (pTask->taskLevel == TASK_LEVEL__AGG) {
+    SReadHandle mgHandle = {
+        .vnode = NULL,
+        .numOfVgroups = (int32_t)taosArrayGetSize(pTask->childEpInfo),
+    };
+    pTask->exec.executor = qCreateStreamExecTaskInfo(pTask->exec.qmsg, &mgHandle);
     ASSERT(pTask->exec.executor);
   }
 
   // sink
   /*pTask->ahandle = pTq->pVnode;*/
-  if (pTask->sinkType == TASK_SINK__SMA) {
+  if (pTask->outputType == TASK_OUTPUT__SMA) {
     pTask->smaSink.vnode = pTq->pVnode;
     pTask->smaSink.smaSink = smaHandleRes;
-  } else if (pTask->sinkType == TASK_SINK__TABLE) {
+  } else if (pTask->outputType == TASK_OUTPUT__TABLE) {
     pTask->tbSink.vnode = pTq->pVnode;
     pTask->tbSink.tbSinkFunc = tqTableSink;
 
@@ -715,7 +713,7 @@ int32_t tqProcessStreamTrigger(STQ* pTq, SSubmitReq* pReq, int64_t ver) {
     pIter = taosHashIterate(pTq->pStreamTasks, pIter);
     if (pIter == NULL) break;
     SStreamTask* pTask = *(SStreamTask**)pIter;
-    if (!pTask->isDataScan) continue;
+    if (pTask->taskLevel != TASK_LEVEL__SOURCE) continue;
 
     qDebug("data submit enqueue stream task: %d, ver: %" PRId64, pTask->taskId, ver);
 
diff --git a/source/dnode/vnode/src/tq/tqRead.c b/source/dnode/vnode/src/tq/tqRead.c
index f20c7e7e55..5017893853 100644
--- a/source/dnode/vnode/src/tq/tqRead.c
+++ b/source/dnode/vnode/src/tq/tqRead.c
@@ -416,7 +416,7 @@ int32_t tqUpdateTbUidList(STQ* pTq, const SArray* tbUidList, bool isAdd) {
     pIter = taosHashIterate(pTq->pStreamTasks, pIter);
     if (pIter == NULL) break;
     SStreamTask* pTask = *(SStreamTask**)pIter;
-    if (pTask->isDataScan) {
+    if (pTask->taskLevel == TASK_LEVEL__SOURCE) {
       int32_t code = qUpdateQualifiedTableId(pTask->exec.executor, tbUidList, isAdd);
       ASSERT(code == 0);
     }
diff --git a/source/libs/stream/src/stream.c b/source/libs/stream/src/stream.c
index 82da396b30..30f0919cee 100644
--- a/source/libs/stream/src/stream.c
+++ b/source/libs/stream/src/stream.c
@@ -65,7 +65,7 @@ void streamSchedByTimer(void* param, void* tmrId) {
     }
     trigger->pBlock->info.type = STREAM_GET_ALL;
 
-    atomic_store_8(&pTask->triggerStatus, TASK_TRIGGER_STATUS__IN_ACTIVE);
+    atomic_store_8(&pTask->triggerStatus, TASK_TRIGGER_STATUS__INACTIVE);
 
     streamTaskInput(pTask, (SStreamQueueItem*)trigger);
     streamSchedExec(pTask);
@@ -77,7 +77,7 @@ void streamSchedByTimer(void* param, void* tmrId) {
 int32_t streamSetupTrigger(SStreamTask* pTask) {
   if (pTask->triggerParam != 0) {
     pTask->timer = taosTmrStart(streamSchedByTimer, (int32_t)pTask->triggerParam, pTask, streamEnv.timer);
-    pTask->triggerStatus = TASK_TRIGGER_STATUS__IN_ACTIVE;
+    pTask->triggerStatus = TASK_TRIGGER_STATUS__INACTIVE;
   }
   return 0;
 }
@@ -186,7 +186,7 @@ int32_t streamProcessDispatchReq(SStreamTask* pTask, SStreamDispatchReq* pReq, S
   if (exec) {
     streamTryExec(pTask);
 
-    if (pTask->dispatchType != TASK_DISPATCH__NONE) {
+    if (pTask->outputType == TASK_OUTPUT__FIXED_DISPATCH || pTask->outputType == TASK_OUTPUT__SHUFFLE_DISPATCH) {
       streamDispatch(pTask);
     }
   } else {
@@ -201,7 +201,7 @@ int32_t streamProcessDispatchRsp(SStreamTask* pTask, SStreamDispatchRsp* pRsp) {
 
   qDebug("task %d receive dispatch rsp", pTask->taskId);
 
-  if (pTask->dispatchType == TASK_DISPATCH__SHUFFLE) {
+  if (pTask->outputType == TASK_OUTPUT__SHUFFLE_DISPATCH) {
     int32_t leftRsp = atomic_sub_fetch_32(&pTask->shuffleDispatcher.waitingRspCnt, 1);
     qDebug("task %d is shuffle, left waiting rsp %d", pTask->taskId, leftRsp);
     if (leftRsp > 0) return 0;
@@ -222,7 +222,7 @@ int32_t streamProcessDispatchRsp(SStreamTask* pTask, SStreamDispatchRsp* pRsp) {
 int32_t streamProcessRunReq(SStreamTask* pTask) {
   streamTryExec(pTask);
 
-  if (pTask->dispatchType != TASK_DISPATCH__NONE) {
+  if (pTask->outputType == TASK_OUTPUT__FIXED_DISPATCH || pTask->outputType == TASK_OUTPUT__SHUFFLE_DISPATCH) {
     streamDispatch(pTask);
   }
   return 0;
@@ -250,7 +250,7 @@ int32_t streamProcessRecoverRsp(SStreamTask* pTask, SStreamTaskRecoverRsp* pRsp)
 
     streamProcessRunReq(pTask);
 
-    if (pTask->isDataScan) {
+    if (pTask->taskLevel == TASK_LEVEL__SOURCE) {
       // scan data to recover
       pTask->inputStatus = TASK_INPUT_STATUS__RECOVER;
       pTask->taskStatus = TASK_STATUS__RECOVERING;
@@ -272,12 +272,11 @@ int32_t streamProcessRetrieveReq(SStreamTask* pTask, SStreamRetrieveReq* pReq, S
 
   streamTaskEnqueueRetrieve(pTask, pReq, pRsp);
 
-  ASSERT(pTask->execType != TASK_EXEC__NONE);
+  ASSERT(pTask->taskLevel != TASK_LEVEL__SINK);
   streamSchedExec(pTask);
 
   /*streamTryExec(pTask);*/
 
-  /*ASSERT(pTask->dispatchType != TASK_DISPATCH__NONE);*/
   /*streamDispatch(pTask);*/
 
   return 0;
diff --git a/source/libs/stream/src/streamDispatch.c b/source/libs/stream/src/streamDispatch.c
index ef7c10c8e1..66e689dd3e 100644
--- a/source/libs/stream/src/streamDispatch.c
+++ b/source/libs/stream/src/streamDispatch.c
@@ -242,7 +242,7 @@ int32_t streamDispatchAllBlocks(SStreamTask* pTask, const SStreamDataBlock* pDat
   int32_t blockNum = taosArrayGetSize(pData->blocks);
   ASSERT(blockNum != 0);
 
-  if (pTask->dispatchType == TASK_DISPATCH__FIXED) {
+  if (pTask->outputType == TASK_OUTPUT__FIXED_DISPATCH) {
     SStreamDispatchReq req = {
         .streamId = pTask->streamId,
         .dataSrcVgId = pData->srcVgId,
@@ -282,7 +282,7 @@ int32_t streamDispatchAllBlocks(SStreamTask* pTask, const SStreamDataBlock* pDat
     taosArrayDestroy(req.dataLen);
     return code;
 
-  } else if (pTask->dispatchType == TASK_DISPATCH__SHUFFLE) {
+  } else if (pTask->outputType == TASK_OUTPUT__SHUFFLE_DISPATCH) {
     int32_t rspCnt = atomic_load_32(&pTask->shuffleDispatcher.waitingRspCnt);
     ASSERT(rspCnt == 0);
 
@@ -393,11 +393,11 @@ int32_t streamBuildDispatchMsg(SStreamTask* pTask, const SStreamDataBlock* data,
   int32_t vgId = 0;
   int32_t downstreamTaskId = 0;
   // find ep
-  if (pTask->dispatchType == TASK_DISPATCH__FIXED) {
+  if (pTask->outputType == TASK_OUTPUT__FIXED_DISPATCH) {
     vgId = pTask->fixedEpDispatcher.nodeId;
     *ppEpSet = &pTask->fixedEpDispatcher.epSet;
     downstreamTaskId = pTask->fixedEpDispatcher.taskId;
-  } else if (pTask->dispatchType == TASK_DISPATCH__SHUFFLE) {
+  } else if (pTask->outputType == TASK_OUTPUT__SHUFFLE_DISPATCH) {
     // TODO get ctbName for each block
     SSDataBlock* pBlock = taosArrayGet(data->blocks, 0);
     char*        ctbName = buildCtbNameByGroupId(pTask->shuffleDispatcher.stbFullName, pBlock->info.groupId);
@@ -439,8 +439,7 @@ FAIL:
 }
 
 int32_t streamDispatch(SStreamTask* pTask) {
-  ASSERT(pTask->dispatchType != TASK_DISPATCH__NONE);
-  ASSERT(pTask->sinkType == TASK_SINK__NONE);
+  ASSERT(pTask->outputType == TASK_OUTPUT__FIXED_DISPATCH || pTask->outputType == TASK_OUTPUT__SHUFFLE_DISPATCH);
 
   int8_t old =
       atomic_val_compare_exchange_8(&pTask->outputStatus, TASK_OUTPUT_STATUS__NORMAL, TASK_OUTPUT_STATUS__WAIT);
diff --git a/source/libs/stream/src/streamExec.c b/source/libs/stream/src/streamExec.c
index 79c35f2889..e662c18a15 100644
--- a/source/libs/stream/src/streamExec.c
+++ b/source/libs/stream/src/streamExec.c
@@ -24,7 +24,7 @@ static int32_t streamTaskExecImpl(SStreamTask* pTask, void* data, SArray* pRes)
     SStreamTrigger* pTrigger = (SStreamTrigger*)data;
     qSetMultiStreamInput(exec, pTrigger->pBlock, 1, STREAM_INPUT__DATA_BLOCK);
   } else if (pItem->type == STREAM_INPUT__DATA_SUBMIT) {
-    ASSERT(pTask->isDataScan);
+    ASSERT(pTask->taskLevel == TASK_LEVEL__SOURCE);
     SStreamDataSubmit* pSubmit = (SStreamDataSubmit*)data;
     qDebug("task %d %p set submit input %p %p %d 1", pTask->taskId, pTask, pSubmit, pSubmit->data, *pSubmit->dataRef);
     qSetMultiStreamInput(exec, pSubmit->data, 1, STREAM_INPUT__DATA_SUBMIT);
@@ -92,7 +92,7 @@ static FORCE_INLINE int32_t streamUpdateVer(SStreamTask* pTask, SStreamDataBlock
 }
 
 int32_t streamPipelineExec(SStreamTask* pTask, int32_t batchNum) {
-  ASSERT(pTask->execType != TASK_EXEC__NONE);
+  ASSERT(pTask->taskLevel != TASK_LEVEL__SINK);
 
   void* exec = pTask->exec.executor;
 
@@ -139,8 +139,7 @@ int32_t streamPipelineExec(SStreamTask* pTask, int32_t batchNum) {
       return -1;
     }
 
-    if (pTask->dispatchType != TASK_DISPATCH__NONE) {
-      ASSERT(pTask->sinkType == TASK_SINK__NONE);
+    if (pTask->outputType == TASK_OUTPUT__FIXED_DISPATCH || pTask->outputType == TASK_OUTPUT__SHUFFLE_DISPATCH) {
       streamDispatch(pTask);
     }
   }
@@ -161,7 +160,7 @@ int32_t streamExecForAll(SStreamTask* pTask) {
       if (data == NULL) {
         data = qItem;
         streamQueueProcessSuccess(pTask->inputQueue);
-        if (pTask->execType == TASK_EXEC__NONE) {
+        if (pTask->taskLevel == TASK_LEVEL__SINK) {
           break;
         }
       } else {
@@ -187,7 +186,7 @@ int32_t streamExecForAll(SStreamTask* pTask) {
       break;
     }
 
-    if (pTask->execType == TASK_EXEC__NONE) {
+    if (pTask->taskLevel == TASK_LEVEL__SINK) {
       ASSERT(((SStreamQueueItem*)data)->type == STREAM_INPUT__DATA_BLOCK);
       streamTaskOutput(pTask, data);
       continue;
diff --git a/source/libs/stream/src/streamMeta.c b/source/libs/stream/src/streamMeta.c
index be9dc81c3c..7dfeefb261 100644
--- a/source/libs/stream/src/streamMeta.c
+++ b/source/libs/stream/src/streamMeta.c
@@ -52,15 +52,16 @@ SStreamMeta* streamMetaOpen(const char* path, void* ahandle, FTaskExpand expandF
 
   pMeta->ahandle = ahandle;
   pMeta->expandFunc = expandFunc;
-
+  return pMeta;
 _err:
-
   return NULL;
 }
 
 void streamMetaClose(SStreamMeta* pMeta) {
-  //
-  return;
+  tdbCommit(pMeta->db, &pMeta->txn);
+  tdbTbClose(pMeta->pTaskDb);
+  tdbTbClose(pMeta->pStateDb);
+  tdbClose(pMeta->db);
 }
 
 int32_t streamMetaAddTask(SStreamMeta* pMeta, SStreamTask* pTask) {
@@ -123,13 +124,32 @@ int32_t streamMetaCommit(SStreamMeta* pMeta) {
   if (tdbCommit(pMeta->db, &pMeta->txn) < 0) {
     return -1;
   }
+  memset(&pMeta->txn, 0, sizeof(TXN));
+  if (tdbTxnOpen(&pMeta->txn, 0, tdbDefaultMalloc, tdbDefaultFree, NULL, TDB_TXN_WRITE | TDB_TXN_READ_UNCOMMITTED) <
+      0) {
+    return -1;
+  }
+  if (tdbBegin(pMeta->db, &pMeta->txn) < 0) {
+    return -1;
+  }
   return 0;
 }
 
-int32_t streamMetaRollBack(SStreamMeta* pMeta) {
-  // TODO tdb rollback
+int32_t streamMetaAbort(SStreamMeta* pMeta) {
+  if (tdbAbort(pMeta->db, &pMeta->txn) < 0) {
+    return -1;
+  }
+  memset(&pMeta->txn, 0, sizeof(TXN));
+  if (tdbTxnOpen(&pMeta->txn, 0, tdbDefaultMalloc, tdbDefaultFree, NULL, TDB_TXN_WRITE | TDB_TXN_READ_UNCOMMITTED) <
+      0) {
+    return -1;
+  }
+  if (tdbBegin(pMeta->db, &pMeta->txn) < 0) {
+    return -1;
+  }
   return 0;
 }
+
 int32_t streamRestoreTask(SStreamMeta* pMeta) {
   TBC* pCur = NULL;
   if (tdbTbcOpen(pMeta->pTaskDb, &pCur, NULL) < 0) {
@@ -153,6 +173,18 @@ int32_t streamRestoreTask(SStreamMeta* pMeta) {
     tDecoderInit(&decoder, (uint8_t*)pVal, vLen);
     tDecodeSStreamTask(&decoder, pTask);
     tDecoderClear(&decoder);
+
+    if (pMeta->expandFunc(pMeta->ahandle, pTask) < 0) {
+      return -1;
+    }
+
+    if (taosHashPut(pMeta->pTasks, &pTask->taskId, sizeof(int32_t), &pTask, sizeof(void*)) < 0) {
+      return -1;
+    }
+  }
+
+  if (tdbTbcClose(pCur) < 0) {
+    return -1;
   }
 
   return 0;
diff --git a/source/libs/stream/src/streamRecover.c b/source/libs/stream/src/streamRecover.c
index dec23cd151..3530c05688 100644
--- a/source/libs/stream/src/streamRecover.c
+++ b/source/libs/stream/src/streamRecover.c
@@ -88,14 +88,15 @@ int32_t tDecodeSMStreamTaskRecoverRsp(SDecoder* pDecoder, SMStreamTaskRecoverRsp
 }
 
 int32_t streamProcessFailRecoverReq(SStreamTask* pTask, SMStreamTaskRecoverReq* pReq, SRpcMsg* pRsp) {
+#if 0
   if (pTask->taskStatus != TASK_STATUS__FAIL) {
     return 0;
   }
 
   if (pTask->isStreamDistributed) {
-    if (pTask->isDataScan) {
+    if (pTask->taskType == TASK_TYPE__SOURCE) {
       pTask->taskStatus = TASK_STATUS__PREPARE_RECOVER;
-    } else if (pTask->execType != TASK_EXEC__NONE) {
+    } else if (pTask->taskType != TASK_TYPE__SINK) {
       pTask->taskStatus = TASK_STATUS__PREPARE_RECOVER;
       bool    hasCheckpoint = false;
       int32_t childSz = taosArrayGetSize(pTask->childEpInfo);
@@ -113,7 +114,7 @@ int32_t streamProcessFailRecoverReq(SStreamTask* pTask, SMStreamTaskRecoverReq*
       }
     }
   } else {
-    if (pTask->isDataScan) {
+    if (pTask->taskType == TASK_TYPE__SOURCE) {
       if (pTask->checkpointVer != -1) {
         // load from checkpoint
       } else {
@@ -133,5 +134,6 @@ int32_t streamProcessFailRecoverReq(SStreamTask* pTask, SMStreamTaskRecoverReq*
     }
   }
 
+#endif
   return 0;
 }
diff --git a/source/libs/stream/src/streamTask.c b/source/libs/stream/src/streamTask.c
index c4e946e191..3a54981989 100644
--- a/source/libs/stream/src/streamTask.c
+++ b/source/libs/stream/src/streamTask.c
@@ -52,10 +52,8 @@ int32_t tEncodeSStreamTask(SEncoder* pEncoder, const SStreamTask* pTask) {
   /*if (tStartEncode(pEncoder) < 0) return -1;*/
   if (tEncodeI64(pEncoder, pTask->streamId) < 0) return -1;
   if (tEncodeI32(pEncoder, pTask->taskId) < 0) return -1;
-  if (tEncodeI8(pEncoder, pTask->isDataScan) < 0) return -1;
-  if (tEncodeI8(pEncoder, pTask->execType) < 0) return -1;
-  if (tEncodeI8(pEncoder, pTask->sinkType) < 0) return -1;
-  if (tEncodeI8(pEncoder, pTask->dispatchType) < 0) return -1;
+  if (tEncodeI8(pEncoder, pTask->taskLevel) < 0) return -1;
+  if (tEncodeI8(pEncoder, pTask->outputType) < 0) return -1;
   if (tEncodeI16(pEncoder, pTask->dispatchMsgType) < 0) return -1;
 
   if (tEncodeI8(pEncoder, pTask->taskStatus) < 0) return -1;
@@ -73,27 +71,23 @@ int32_t tEncodeSStreamTask(SEncoder* pEncoder, const SStreamTask* pTask) {
     if (tEncodeStreamEpInfo(pEncoder, pInfo) < 0) return -1;
   }
 
-  if (pTask->execType != TASK_EXEC__NONE) {
+  if (pTask->taskLevel != TASK_LEVEL__SINK) {
     if (tEncodeCStr(pEncoder, pTask->exec.qmsg) < 0) return -1;
   }
 
-  if (pTask->sinkType == TASK_SINK__TABLE) {
+  if (pTask->outputType == TASK_OUTPUT__TABLE) {
     if (tEncodeI64(pEncoder, pTask->tbSink.stbUid) < 0) return -1;
     if (tEncodeCStr(pEncoder, pTask->tbSink.stbFullName) < 0) return -1;
     if (tEncodeSSchemaWrapper(pEncoder, pTask->tbSink.pSchemaWrapper) < 0) return -1;
-  } else if (pTask->sinkType == TASK_SINK__SMA) {
+  } else if (pTask->outputType == TASK_OUTPUT__SMA) {
     if (tEncodeI64(pEncoder, pTask->smaSink.smaId) < 0) return -1;
-  } else if (pTask->sinkType == TASK_SINK__FETCH) {
+  } else if (pTask->outputType == TASK_OUTPUT__FETCH) {
     if (tEncodeI8(pEncoder, pTask->fetchSink.reserved) < 0) return -1;
-  } else {
-    ASSERT(pTask->sinkType == TASK_SINK__NONE);
-  }
-
-  if (pTask->dispatchType == TASK_DISPATCH__FIXED) {
+  } else if (pTask->outputType == TASK_OUTPUT__FIXED_DISPATCH) {
     if (tEncodeI32(pEncoder, pTask->fixedEpDispatcher.taskId) < 0) return -1;
     if (tEncodeI32(pEncoder, pTask->fixedEpDispatcher.nodeId) < 0) return -1;
     if (tEncodeSEpSet(pEncoder, &pTask->fixedEpDispatcher.epSet) < 0) return -1;
-  } else if (pTask->dispatchType == TASK_DISPATCH__SHUFFLE) {
+  } else if (pTask->outputType == TASK_OUTPUT__SHUFFLE_DISPATCH) {
     if (tSerializeSUseDbRspImp(pEncoder, &pTask->shuffleDispatcher.dbInfo) < 0) return -1;
     if (tEncodeCStr(pEncoder, pTask->shuffleDispatcher.stbFullName) < 0) return -1;
   }
@@ -107,10 +101,8 @@ int32_t tDecodeSStreamTask(SDecoder* pDecoder, SStreamTask* pTask) {
   /*if (tStartDecode(pDecoder) < 0) return -1;*/
   if (tDecodeI64(pDecoder, &pTask->streamId) < 0) return -1;
   if (tDecodeI32(pDecoder, &pTask->taskId) < 0) return -1;
-  if (tDecodeI8(pDecoder, &pTask->isDataScan) < 0) return -1;
-  if (tDecodeI8(pDecoder, &pTask->execType) < 0) return -1;
-  if (tDecodeI8(pDecoder, &pTask->sinkType) < 0) return -1;
-  if (tDecodeI8(pDecoder, &pTask->dispatchType) < 0) return -1;
+  if (tDecodeI8(pDecoder, &pTask->taskLevel) < 0) return -1;
+  if (tDecodeI8(pDecoder, &pTask->outputType) < 0) return -1;
   if (tDecodeI16(pDecoder, &pTask->dispatchMsgType) < 0) return -1;
 
   if (tDecodeI8(pDecoder, &pTask->taskStatus) < 0) return -1;
@@ -131,29 +123,25 @@ int32_t tDecodeSStreamTask(SDecoder* pDecoder, SStreamTask* pTask) {
     taosArrayPush(pTask->childEpInfo, &pInfo);
   }
 
-  if (pTask->execType != TASK_EXEC__NONE) {
+  if (pTask->taskLevel != TASK_LEVEL__SINK) {
     if (tDecodeCStrAlloc(pDecoder, &pTask->exec.qmsg) < 0) return -1;
   }
 
-  if (pTask->sinkType == TASK_SINK__TABLE) {
+  if (pTask->outputType == TASK_OUTPUT__TABLE) {
     if (tDecodeI64(pDecoder, &pTask->tbSink.stbUid) < 0) return -1;
     if (tDecodeCStrTo(pDecoder, pTask->tbSink.stbFullName) < 0) return -1;
     pTask->tbSink.pSchemaWrapper = taosMemoryCalloc(1, sizeof(SSchemaWrapper));
     if (pTask->tbSink.pSchemaWrapper == NULL) return -1;
     if (tDecodeSSchemaWrapper(pDecoder, pTask->tbSink.pSchemaWrapper) < 0) return -1;
-  } else if (pTask->sinkType == TASK_SINK__SMA) {
+  } else if (pTask->outputType == TASK_OUTPUT__SMA) {
     if (tDecodeI64(pDecoder, &pTask->smaSink.smaId) < 0) return -1;
-  } else if (pTask->sinkType == TASK_SINK__FETCH) {
+  } else if (pTask->outputType == TASK_OUTPUT__FETCH) {
     if (tDecodeI8(pDecoder, &pTask->fetchSink.reserved) < 0) return -1;
-  } else {
-    ASSERT(pTask->sinkType == TASK_SINK__NONE);
-  }
-
-  if (pTask->dispatchType == TASK_DISPATCH__FIXED) {
+  } else if (pTask->outputType == TASK_OUTPUT__FIXED_DISPATCH) {
     if (tDecodeI32(pDecoder, &pTask->fixedEpDispatcher.taskId) < 0) return -1;
     if (tDecodeI32(pDecoder, &pTask->fixedEpDispatcher.nodeId) < 0) return -1;
     if (tDecodeSEpSet(pDecoder, &pTask->fixedEpDispatcher.epSet) < 0) return -1;
-  } else if (pTask->dispatchType == TASK_DISPATCH__SHUFFLE) {
+  } else if (pTask->outputType == TASK_OUTPUT__SHUFFLE_DISPATCH) {
     if (tDeserializeSUseDbRspImp(pDecoder, &pTask->shuffleDispatcher.dbInfo) < 0) return -1;
     if (tDecodeCStrTo(pDecoder, pTask->shuffleDispatcher.stbFullName) < 0) return -1;
   }