diff --git a/source/dnode/vnode/src/tsdb/tsdbRead2.c b/source/dnode/vnode/src/tsdb/tsdbRead2.c
index f3c5d9ec93..d71f1729b6 100644
--- a/source/dnode/vnode/src/tsdb/tsdbRead2.c
+++ b/source/dnode/vnode/src/tsdb/tsdbRead2.c
@@ -58,6 +58,7 @@ static TSDBKEY       getCurrentKeyInBuf(STableBlockScanInfo* pScanInfo, STsdbRea
 static bool          hasDataInFileBlock(const SBlockData* pBlockData, const SFileBlockDumpInfo* pDumpInfo);
 static void          initBlockDumpInfo(STsdbReader* pReader, SDataBlockIter* pBlockIter);
 static int32_t       getInitialDelIndex(const SArray* pDelSkyline, int32_t order);
+static void          resetTableListIndex(SReaderStatus* pStatus);
 
 static bool outOfTimeWindow(int64_t ts, STimeWindow* pWindow) { return (ts > pWindow->ekey) || (ts < pWindow->skey); }
 
@@ -241,11 +242,7 @@ static int32_t filesetIteratorNext(SFilesetIter* pIter, STsdbReader* pReader, bo
 
     tsdbDebug("%p file found fid:%d for qrange:%" PRId64 "-%" PRId64 ", %s", pReader, fid, pReader->info.window.skey,
               pReader->info.window.ekey, pReader->idStr);
-    if (pReader->notifyFn) {
-      STsdReaderNotifyInfo info = {0};
-      info.duration.fileSetId = fid;
-      pReader->notifyFn(TSD_READER_NOTIFY_DURATION, &info, pReader->notifyParam);
-    }
+
     *hasNext = true;
     return TSDB_CODE_SUCCESS;
   }
@@ -436,6 +433,8 @@ static int32_t tsdbReaderCreate(SVnode* pVnode, SQueryTableDataCond* pCond, void
     goto _end;
   }
 
+  pReader->bDurationOrder = true;
+
   tsdbInitReaderLock(pReader);
 
   *ppReader = pReader;
@@ -2550,6 +2549,8 @@ static int32_t moveToNextFile(STsdbReader* pReader, SBlockNumber* pBlockNum, SAr
       }
 
       if (pBlockNum->numOfBlocks + pBlockNum->numOfSttFiles > 0) {
+        pReader->status.bProcMemPreFileset = true;
+        resetTableListIndex(&pReader->status);
         break;
       }
     }
@@ -2931,7 +2932,7 @@ static int32_t readRowsCountFromMem(STsdbReader* pReader) {
   return code;
 }
 
-static int32_t buildBlockFromBufferSequentially(STsdbReader* pReader) {
+static int32_t buildBlockFromBufferSequentially(STsdbReader* pReader, int64_t endKey) {
   SReaderStatus* pStatus = &pReader->status;
   STableUidList* pUidList = &pStatus->uidList;
 
@@ -2948,13 +2949,12 @@ static int32_t buildBlockFromBufferSequentially(STsdbReader* pReader) {
       if (!hasNexTable) {
         return TSDB_CODE_SUCCESS;
       }
-      pBlockScanInfo = pStatus->pTableIter;
+      continue;
     }
 
     initMemDataIterator(*pBlockScanInfo, pReader);
     initDelSkylineIterator(*pBlockScanInfo, pReader->info.order, &pReader->cost);
 
-    int64_t endKey = (ASCENDING_TRAVERSE(pReader->info.order)) ? INT64_MAX : INT64_MIN;
     int32_t code = buildDataBlockFromBuf(pReader, *pBlockScanInfo, endKey);
     if (code != TSDB_CODE_SUCCESS) {
       return code;
@@ -4350,6 +4350,70 @@ static bool tsdbReadRowsCountOnly(STsdbReader* pReader) {
   return pBlock->info.rows > 0;
 }
 
+static int32_t doTsdbNextDataBlockDurationOrder(STsdbReader* pReader) {
+  SReaderStatus* pStatus = &pReader->status;
+  int32_t code = TSDB_CODE_SUCCESS;
+  SSDataBlock* pBlock = pReader->resBlockInfo.pResBlock;
+
+  if (pStatus->loadFromFile) {
+    if (pStatus->bProcMemPreFileset) {
+      int32_t fid = pReader->status.pCurrentFileset->fid;
+      STimeWindow win = {0};
+      tsdbFidKeyRange(fid, pReader->pTsdb->keepCfg.days, pReader->pTsdb->keepCfg.precision, &win.skey, &win.ekey);
+
+      code = buildBlockFromBufferSequentially(pReader, win.skey);
+      if (code != TSDB_CODE_SUCCESS || pBlock->info.rows > 0) {
+        return code;
+      } else {
+        pStatus->bProcMemPreFileset = false;
+        if (pReader->notifyFn) {
+          STsdReaderNotifyInfo info = {0};
+          info.duration.fileSetId = fid;
+          pReader->notifyFn(TSD_READER_NOTIFY_DURATION, &info, pReader->notifyParam);
+        }
+      }
+    }
+
+    code = buildBlockFromFiles(pReader);
+    if (code != TSDB_CODE_SUCCESS) {
+      return code;
+    }
+
+    if (pBlock->info.rows <= 0) {
+      resetTableListIndex(&pReader->status);
+      int64_t endKey = (ASCENDING_TRAVERSE(pReader->info.order)) ? INT64_MAX : INT64_MIN;
+      code = buildBlockFromBufferSequentially(pReader, endKey);
+    }
+  } else {  // no data in files, let's try the buffer
+    int64_t endKey = (ASCENDING_TRAVERSE(pReader->info.order)) ? INT64_MAX : INT64_MIN;
+    code = buildBlockFromBufferSequentially(pReader, endKey);
+  }
+  return code;
+}
+
+static int32_t doTsdbNextDataBlockFilesFirst(STsdbReader* pReader) {
+  SReaderStatus* pStatus = &pReader->status;
+  int32_t code = TSDB_CODE_SUCCESS;
+  SSDataBlock* pBlock = pReader->resBlockInfo.pResBlock;
+
+  if (pStatus->loadFromFile) {
+    code = buildBlockFromFiles(pReader);
+    if (code != TSDB_CODE_SUCCESS) {
+      return code;
+    }
+
+    if (pBlock->info.rows <= 0) {
+      resetTableListIndex(&pReader->status);
+      int64_t endKey = (ASCENDING_TRAVERSE(pReader->info.order)) ? INT64_MAX : INT64_MIN;
+      code = buildBlockFromBufferSequentially(pReader, endKey);
+    }
+  } else {  // no data in files, let's try the buffer
+    int64_t endKey = (ASCENDING_TRAVERSE(pReader->info.order)) ? INT64_MAX : INT64_MIN;
+    code = buildBlockFromBufferSequentially(pReader, endKey);
+  }
+  return code;
+}
+
 static int32_t doTsdbNextDataBlock2(STsdbReader* pReader, bool* hasNext) {
   int32_t code = TSDB_CODE_SUCCESS;
 
@@ -4367,19 +4431,10 @@ static int32_t doTsdbNextDataBlock2(STsdbReader* pReader, bool* hasNext) {
   if (READ_MODE_COUNT_ONLY == pReader->info.readMode) {
     return tsdbReadRowsCountOnly(pReader);
   }
-
-  if (pStatus->loadFromFile) {
-    code = buildBlockFromFiles(pReader);
-    if (code != TSDB_CODE_SUCCESS) {
-      return code;
-    }
-
-    if (pBlock->info.rows <= 0) {
-      resetTableListIndex(&pReader->status);
-      code = buildBlockFromBufferSequentially(pReader);
-    }
-  } else {  // no data in files, let's try the buffer
-    code = buildBlockFromBufferSequentially(pReader);
+  if (!pReader->bDurationOrder) {
+    code = doTsdbNextDataBlockFilesFirst(pReader);
+  } else {
+    code = doTsdbNextDataBlockDurationOrder(pReader);
   }
 
   *hasNext = pBlock->info.rows > 0;
diff --git a/source/dnode/vnode/src/tsdb/tsdbReadUtil.h b/source/dnode/vnode/src/tsdb/tsdbReadUtil.h
index fb32190115..2d5b6f38a6 100644
--- a/source/dnode/vnode/src/tsdb/tsdbReadUtil.h
+++ b/source/dnode/vnode/src/tsdb/tsdbReadUtil.h
@@ -206,6 +206,7 @@ typedef struct SReaderStatus {
   SArray*               pLDataIterArray;
   SRowMerger            merger;
   SColumnInfoData*      pPrimaryTsCol;  // primary time stamp output col info data
+  bool                  bProcMemPreFileset;
 } SReaderStatus;
 
 struct STsdbReader {
@@ -228,6 +229,7 @@ struct STsdbReader {
   SBlockInfoBuf      blockInfoBuf;
   EContentData       step;
   STsdbReader*       innerReader[2];
+  bool                 bDurationOrder;   // duration by duration output
   TsdReaderNotifyCbFn  notifyFn;
   void*              notifyParam;
 };