diff --git a/source/dnode/vnode/src/tsdb/tsdbRead.c b/source/dnode/vnode/src/tsdb/tsdbRead.c
index a77eb8298ed9c0578bd8cad2401513fc2a50e9fa..0bb9ebc40e522a24da6b906f02711e706fa0e764 100644
--- a/source/dnode/vnode/src/tsdb/tsdbRead.c
+++ b/source/dnode/vnode/src/tsdb/tsdbRead.c
@@ -2693,10 +2693,6 @@ static void extractOrderedTableUidList(SUidOrderCheckInfo* pOrderCheckInfo, SRea
   void* p = taosHashIterate(pStatus->pTableMap, NULL);
   while (p != NULL) {
     STableBlockScanInfo* pScanInfo = *(STableBlockScanInfo**)p;
-
-    // reset the last del file index
-    pScanInfo->lastBlockDelIndex = getInitialDelIndex(pScanInfo->delSkyline, order);
-
     pOrderCheckInfo->tableUidList[index++] = pScanInfo->uid;
     p = taosHashIterate(pStatus->pTableMap, p);
   }
@@ -2704,6 +2700,18 @@ static void extractOrderedTableUidList(SUidOrderCheckInfo* pOrderCheckInfo, SRea
   taosSort(pOrderCheckInfo->tableUidList, total, sizeof(uint64_t), uidComparFunc);
 }
 
+// reset the last del file index
+static void resetScanBlockLastBlockDelIndex(SReaderStatus* pStatus, int32_t order) {
+  void* p = taosHashIterate(pStatus->pTableMap, NULL);
+  while (p != NULL) {
+    STableBlockScanInfo* pScanInfo = *(STableBlockScanInfo**)p;
+
+    // reset the last del file index
+    pScanInfo->lastBlockDelIndex = getInitialDelIndex(pScanInfo->delSkyline, order);
+    p = taosHashIterate(pStatus->pTableMap, p);
+  }
+}
+
 static int32_t initOrderCheckInfo(SUidOrderCheckInfo* pOrderCheckInfo, STsdbReader* pReader) {
   SReaderStatus* pStatus = &pReader->status;
 
@@ -3052,6 +3060,7 @@ static int32_t buildBlockFromFiles(STsdbReader* pReader) {
 
       // this file does not have data files, let's start check the last block file if exists
       if (pBlockIter->numOfBlocks == 0) {
+        resetScanBlockLastBlockDelIndex(&pReader->status, pReader->order);
         goto _begin;
       }
     }
@@ -3083,6 +3092,7 @@ static int32_t buildBlockFromFiles(STsdbReader* pReader) {
             // data blocks in current file are exhausted, let's try the next file now
             tBlockDataReset(&pReader->status.fileBlockData);
             resetDataBlockIterator(pBlockIter, pReader->order);
+            resetScanBlockLastBlockDelIndex(&pReader->status, pReader->order);
             goto _begin;
           } else {
             code = initForFirstBlockInFile(pReader, pBlockIter);
@@ -3094,6 +3104,7 @@ static int32_t buildBlockFromFiles(STsdbReader* pReader) {
 
             // this file does not have blocks, let's start check the last block file
             if (pBlockIter->numOfBlocks == 0) {
+              resetScanBlockLastBlockDelIndex(&pReader->status, pReader->order);
               goto _begin;
             }
           }
diff --git a/source/util/src/talgo.c b/source/util/src/talgo.c
index a06aac6afe3a64dcb9e53a7580c797f4d90a06a9..e373850b3cc5257ab78a8e9fde8249e14412dd21 100644
--- a/source/util/src/talgo.c
+++ b/source/util/src/talgo.c
@@ -28,14 +28,14 @@ static void median(void *src, int64_t size, int64_t s, int64_t e, const void *pa
                    void *buf) {
   int32_t mid = ((int32_t)(e - s) >> 1u) + (int32_t)s;
 
-  if (comparFn(elePtrAt(src, size, mid), elePtrAt(src, size, s), param) == 1) {
+  if (comparFn(elePtrAt(src, size, mid), elePtrAt(src, size, s), param) > 0) {
     doswap(elePtrAt(src, size, mid), elePtrAt(src, size, s), size, buf);
   }
 
-  if (comparFn(elePtrAt(src, size, mid), elePtrAt(src, size, e), param) == 1) {
+  if (comparFn(elePtrAt(src, size, mid), elePtrAt(src, size, e), param) > 0) {
     doswap(elePtrAt(src, size, mid), elePtrAt(src, size, s), size, buf);
     doswap(elePtrAt(src, size, mid), elePtrAt(src, size, e), size, buf);
-  } else if (comparFn(elePtrAt(src, size, s), elePtrAt(src, size, e), param) == 1) {
+  } else if (comparFn(elePtrAt(src, size, s), elePtrAt(src, size, e), param) > 0) {
     doswap(elePtrAt(src, size, s), elePtrAt(src, size, e), size, buf);
   }
 
@@ -47,7 +47,7 @@ static void tInsertSort(void *src, int64_t size, int32_t s, int32_t e, const voi
                         void *buf) {
   for (int32_t i = s + 1; i <= e; ++i) {
     for (int32_t j = i; j > s; --j) {
-      if (comparFn(elePtrAt(src, size, j), elePtrAt(src, size, j - 1), param) == -1) {
+      if (comparFn(elePtrAt(src, size, j), elePtrAt(src, size, j - 1), param) < 0) {
         doswap(elePtrAt(src, size, j), elePtrAt(src, size, j - 1), size, buf);
       } else {
         break;