diff --git a/source/libs/executor/inc/dataSinkMgt.h b/include/libs/executor/dataSinkMgt.h
similarity index 80%
rename from source/libs/executor/inc/dataSinkMgt.h
rename to include/libs/executor/dataSinkMgt.h
index d13423b25d..a0819fcf85 100644
--- a/source/libs/executor/inc/dataSinkMgt.h
+++ b/include/libs/executor/dataSinkMgt.h
@@ -21,13 +21,11 @@ extern "C" {
 #endif
 
 #include "os.h"
-#include "executorimpl.h"
+#include "thash.h"
 
-#define DS_CAPACITY_ENOUGH 1
-#define DS_CAPACITY_FULL   2
-#define DS_NEED_SCHEDULE   3
-#define DS_END             4
-#define DS_IN_PROCESS      5
+#define DS_BUF_LOW   1
+#define DS_BUF_FULL  2
+#define DS_BUF_EMPTY 3
 
 struct SDataSink;
 struct SSDataBlock;
@@ -42,15 +40,20 @@ int32_t dsDataSinkMgtInit(SDataSinkMgtCfg *cfg);
 typedef void* DataSinkHandle;
 
 typedef struct SInputData {
-  const SSDataBlock* pData;
+  const struct SSDataBlock* pData;
   SHashObj* pTableRetrieveTsMap;
 } SInputData;
 
-typedef struct SOutPutData {
+typedef struct SOutputData {
   int32_t numOfRows;
   int8_t  compressed;
   char*   pData;
-} SOutPutData;
+  bool    queryEnd;
+  bool    needSchedule;
+  int32_t bufStatus;
+  int64_t useconds;
+  int8_t  precision;
+} SOutputData;
 
 /**
  * Create a subplan's datasinker handle for all later operations. 
@@ -66,16 +69,16 @@ int32_t dsCreateDataSinker(const struct SDataSink *pDataSink, DataSinkHandle* pH
  * @param pRes
  * @return error code
  */
-int32_t dsPutDataBlock(DataSinkHandle handle, const SInputData* pInput, int32_t* pStatus);
+int32_t dsPutDataBlock(DataSinkHandle handle, const SInputData* pInput, bool* pContinue);
 
-void dsEndPut(DataSinkHandle handle);
+void dsEndPut(DataSinkHandle handle, int64_t useconds);
 
 /**
  * Get the length of the data returned by the next call to dsGetDataBlock.
  * @param handle
- * @return data length
+ * @param pLen data length
  */
-int32_t dsGetDataLength(DataSinkHandle handle, int32_t* pStatus);
+void dsGetDataLength(DataSinkHandle handle, int32_t* pLen, bool* pQueryEnd);
 
 /**
  * Get data, the caller needs to allocate data memory.
@@ -84,7 +87,7 @@ int32_t dsGetDataLength(DataSinkHandle handle, int32_t* pStatus);
  * @param pStatus output
  * @return error code
  */
-int32_t dsGetDataBlock(DataSinkHandle handle, SOutPutData* pOutput, int32_t* pStatus);
+int32_t dsGetDataBlock(DataSinkHandle handle, SOutputData* pOutput);
 
 /**
  * After dsGetStatus returns DS_NEED_SCHEDULE, the caller need to put this into the work queue.
diff --git a/source/libs/executor/inc/dataSinkInt.h b/source/libs/executor/inc/dataSinkInt.h
index 1bbf5494dd..69727626af 100644
--- a/source/libs/executor/inc/dataSinkInt.h
+++ b/source/libs/executor/inc/dataSinkInt.h
@@ -31,10 +31,10 @@ typedef struct SDataSinkManager {
   pthread_mutex_t mutex;
 } SDataSinkManager;
 
-typedef int32_t (*FPutDataBlock)(struct SDataSinkHandle* pHandle, const SInputData* pInput, int32_t* pStatus);
-typedef void (*FEndPut)(struct SDataSinkHandle* pHandle);
-typedef int32_t (*FGetDataLength)(struct SDataSinkHandle* pHandle, int32_t* pStatus);
-typedef int32_t (*FGetDataBlock)(struct SDataSinkHandle* pHandle, SOutPutData* pOutput, int32_t* pStatus);
+typedef int32_t (*FPutDataBlock)(struct SDataSinkHandle* pHandle, const SInputData* pInput, bool* pContinue);
+typedef void (*FEndPut)(struct SDataSinkHandle* pHandle, int64_t useconds);
+typedef void (*FGetDataLength)(struct SDataSinkHandle* pHandle, int32_t* pLen, bool* pQueryEnd);
+typedef int32_t (*FGetDataBlock)(struct SDataSinkHandle* pHandle, SOutputData* pOutput);
 typedef int32_t (*FDestroyDataSinker)(struct SDataSinkHandle* pHandle);
 
 typedef struct SDataSinkHandle {
diff --git a/source/libs/executor/src/dataDispatcher.c b/source/libs/executor/src/dataDispatcher.c
index 3d8e51d04d..e4b0557bff 100644
--- a/source/libs/executor/src/dataDispatcher.c
+++ b/source/libs/executor/src/dataDispatcher.c
@@ -19,6 +19,7 @@
 #include "tcompression.h"
 #include "tglobal.h"
 #include "tqueue.h"
+#include "executorimpl.h"
 
 #define DATA_META_LENGTH(tables) (sizeof(int32_t) + sizeof(STableIdInfo) * taosHashGetSize(tables) + sizeof(SRetrieveTableRsp))
 
@@ -42,6 +43,8 @@ typedef struct SDataDispatchHandle {
   STaosQueue* pDataBlocks;
   SDataDispatchBuf nextOutput;
   int32_t status;
+  bool queryEnd;
+  int64_t useconds;
   pthread_mutex_t mutex;
 } SDataDispatchHandle;
 
@@ -124,7 +127,9 @@ static bool allocBuf(SDataDispatchHandle* pDispatcher, const SInputData* pInput,
 
 static int32_t updateStatus(SDataDispatchHandle* pDispatcher) {
   pthread_mutex_lock(&pDispatcher->mutex);
-  int32_t status = taosQueueSize(pDispatcher->pDataBlocks) < pDispatcher->pManager->cfg.maxDataBlockNumPerQuery ? DS_CAPACITY_ENOUGH : DS_CAPACITY_FULL;
+  int32_t blockNums = taosQueueSize(pDispatcher->pDataBlocks);
+  int32_t status = (0 == blockNums ? DS_BUF_EMPTY :
+      (blockNums < pDispatcher->pManager->cfg.maxDataBlockNumPerQuery ? DS_BUF_LOW : DS_BUF_FULL));
   pDispatcher->status = status;
   pthread_mutex_unlock(&pDispatcher->mutex);
   return status;
@@ -137,7 +142,7 @@ static int32_t getStatus(SDataDispatchHandle* pDispatcher) {
   return status;
 }
 
-static int32_t putDataBlock(SDataSinkHandle* pHandle, const SInputData* pInput, int32_t* pStatus) {
+static int32_t putDataBlock(SDataSinkHandle* pHandle, const SInputData* pInput, bool* pContinue) {
   SDataDispatchHandle* pDispatcher = (SDataDispatchHandle*)pHandle;
   SDataDispatchBuf* pBuf = taosAllocateQitem(sizeof(SDataDispatchBuf));
   if (NULL == pBuf || !allocBuf(pDispatcher, pInput, pBuf)) {
@@ -145,38 +150,46 @@ static int32_t putDataBlock(SDataSinkHandle* pHandle, const SInputData* pInput,
   }
   toDataCacheEntry(pDispatcher, pInput, pBuf);
   taosWriteQitem(pDispatcher->pDataBlocks, pBuf);
-  *pStatus = updateStatus(pDispatcher);
+  *pContinue = (DS_BUF_LOW == updateStatus(pDispatcher) ? true : false);
   return TSDB_CODE_SUCCESS;
 }
 
-static void endPut(struct SDataSinkHandle* pHandle) {
+static void endPut(struct SDataSinkHandle* pHandle, int64_t useconds) {
   SDataDispatchHandle* pDispatcher = (SDataDispatchHandle*)pHandle;
   pthread_mutex_lock(&pDispatcher->mutex);
-  pDispatcher->status = DS_END;
+  pDispatcher->queryEnd = true;
+  pDispatcher->useconds = useconds;
   pthread_mutex_unlock(&pDispatcher->mutex);
 }
 
-static int32_t getDataLength(SDataSinkHandle* pHandle, int32_t* pStatus) {
+static void getDataLength(SDataSinkHandle* pHandle, int32_t* pLen, bool* pQueryEnd) {
   SDataDispatchHandle* pDispatcher = (SDataDispatchHandle*)pHandle;
   if (taosQueueEmpty(pDispatcher->pDataBlocks)) {
-    *pStatus = getStatus(pDispatcher) ? DS_END : DS_IN_PROCESS;
-    return 0;
+    *pQueryEnd = pDispatcher->queryEnd;
+    *pLen = 0;
+    return;
   }
   SDataDispatchBuf* pBuf = NULL;
   taosReadQitem(pDispatcher->pDataBlocks, (void**)&pBuf);
   memcpy(&pDispatcher->nextOutput, pBuf, sizeof(SDataDispatchBuf));
   taosFreeQitem(pBuf);
-  return ((SDataCacheEntry*)(pDispatcher->nextOutput.pData))->dataLen;
+  *pLen = ((SDataCacheEntry*)(pDispatcher->nextOutput.pData))->dataLen;
 }
 
-static int32_t getDataBlock(SDataSinkHandle* pHandle, SOutPutData* pOutput, int32_t* pStatus) {
+static int32_t getDataBlock(SDataSinkHandle* pHandle, SOutputData* pOutput) {
   SDataDispatchHandle* pDispatcher = (SDataDispatchHandle*)pHandle;
   SDataCacheEntry* pEntry = (SDataCacheEntry*)(pDispatcher->nextOutput.pData);
   memcpy(pOutput->pData, pEntry->data, pEntry->dataLen);
   pOutput->numOfRows = pEntry->numOfRows;
   pOutput->compressed = pEntry->compressed;
   tfree(pDispatcher->nextOutput.pData);  // todo persistent
-  *pStatus = updateStatus(pDispatcher);
+  pOutput->bufStatus = updateStatus(pDispatcher);
+  pthread_mutex_lock(&pDispatcher->mutex);
+  pOutput->queryEnd = pDispatcher->queryEnd;
+  pOutput->needSchedule = false;
+  pOutput->useconds = pDispatcher->useconds;
+  pOutput->precision = pDispatcher->schema.precision;
+  pthread_mutex_unlock(&pDispatcher->mutex);
   return TSDB_CODE_SUCCESS;
 }
 
@@ -205,7 +218,8 @@ int32_t createDataDispatcher(SDataSinkManager* pManager, const SDataSink* pDataS
   dispatcher->sink.fDestroy = destroyDataSinker;
   dispatcher->pManager = pManager;
   dispatcher->schema = pDataSink->schema;
-  dispatcher->status = DS_CAPACITY_ENOUGH;
+  dispatcher->status = DS_BUF_EMPTY;
+  dispatcher->queryEnd = false;
   dispatcher->pDataBlocks = taosOpenQueue();
   pthread_mutex_init(&dispatcher->mutex, NULL);
   if (NULL == dispatcher->pDataBlocks) {
diff --git a/source/libs/executor/src/dataSinkMgt.c b/source/libs/executor/src/dataSinkMgt.c
index 8a96c5d05f..e3f0cd7eaa 100644
--- a/source/libs/executor/src/dataSinkMgt.c
+++ b/source/libs/executor/src/dataSinkMgt.c
@@ -31,24 +31,24 @@ int32_t dsCreateDataSinker(const struct SDataSink *pDataSink, DataSinkHandle* pH
   return TSDB_CODE_FAILED;
 }
 
-int32_t dsPutDataBlock(DataSinkHandle handle, const SInputData* pInput, int32_t* pStatus) {
+int32_t dsPutDataBlock(DataSinkHandle handle, const SInputData* pInput, bool* pContinue) {
   SDataSinkHandle* pHandleImpl = (SDataSinkHandle*)handle;
-  return pHandleImpl->fPut(pHandleImpl, pInput, pStatus);
+  return pHandleImpl->fPut(pHandleImpl, pInput, pContinue);
 }
 
-void dsEndPut(DataSinkHandle handle) {
+void dsEndPut(DataSinkHandle handle, int64_t useconds) {
   SDataSinkHandle* pHandleImpl = (SDataSinkHandle*)handle;
-  return pHandleImpl->fEndPut(pHandleImpl);
+  return pHandleImpl->fEndPut(pHandleImpl, useconds);
 }
 
-int32_t dsGetDataLength(DataSinkHandle handle, int32_t* pStatus) {
+void dsGetDataLength(DataSinkHandle handle, int32_t* pLen, bool* pQueryEnd) {
   SDataSinkHandle* pHandleImpl = (SDataSinkHandle*)handle;
-  return pHandleImpl->fGetLen(pHandleImpl, pStatus);
+  pHandleImpl->fGetLen(pHandleImpl, pLen, pQueryEnd);
 }
 
-int32_t dsGetDataBlock(DataSinkHandle handle, SOutPutData* pOutput, int32_t* pStatus) {
+int32_t dsGetDataBlock(DataSinkHandle handle, SOutputData* pOutput) {
   SDataSinkHandle* pHandleImpl = (SDataSinkHandle*)handle;
-  return pHandleImpl->fGetData(pHandleImpl, pOutput, pStatus);
+  return pHandleImpl->fGetData(pHandleImpl, pOutput);
 }
 
 void dsScheduleProcess(void* ahandle, void* pItem) {