diff --git a/source/dnode/vnode/src/tsdb/tsdbRead.c b/source/dnode/vnode/src/tsdb/tsdbRead.c
index 11c46df8fbbb61fc1c76da3b2cc602ba48f647d4..35d86fa1fb868faa9badc12364af173331b3d636 100644
--- a/source/dnode/vnode/src/tsdb/tsdbRead.c
+++ b/source/dnode/vnode/src/tsdb/tsdbRead.c
@@ -194,6 +194,8 @@ static bool          hasDataInLastBlock(SLastBlockReader* pLastBlockReader);
 static int32_t       doBuildDataBlock(STsdbReader* pReader);
 static TSDBKEY       getCurrentKeyInBuf(STableBlockScanInfo* pScanInfo, STsdbReader* pReader);
 
+static bool outOfTimeWindow(int64_t ts, STimeWindow* pWindow) { return (ts > pWindow->ekey) || (ts < pWindow->skey); }
+
 static int32_t setColumnIdSlotList(STsdbReader* pReader, SSDataBlock* pBlock) {
   SBlockLoadSuppInfo* pSupInfo = &pReader->suppInfo;
 
@@ -902,7 +904,10 @@ static int32_t copyBlockDataToSDataBlock(STsdbReader* pReader, STableBlockScanIn
   pResBlock->info.rows = remain;
   pDumpInfo->rowIndex += step * remain;
 
-  if ((pDumpInfo->rowIndex >= pBlock->nRow && asc) ||(pDumpInfo->rowIndex < 0 && !asc)) {
+  if (pDumpInfo->rowIndex >= 0 && pDumpInfo->rowIndex < pBlock->nRow) {
+    int64_t ts = pBlockData->aTSKEY[pDumpInfo->rowIndex];
+    setBlockAllDumped(pDumpInfo, ts, pReader->order);
+  } else {
     int64_t k = asc? pBlock->maxKey.ts:pBlock->minKey.ts;
     setBlockAllDumped(pDumpInfo, k, pReader->order);
   }
@@ -2099,8 +2104,6 @@ static bool isValidFileBlockRow(SBlockData* pBlockData, SFileBlockDumpInfo* pDum
   return true;
 }
 
-static bool outOfTimeWindow(int64_t ts, STimeWindow* pWindow) { return (ts > pWindow->ekey) || (ts < pWindow->skey); }
-
 static bool initLastBlockReader(SLastBlockReader* pLBlockReader, STableBlockScanInfo* pScanInfo, STsdbReader* pReader) {
   // the last block reader has been initialized for this table.
   if (pLBlockReader->uid == pScanInfo->uid) {