diff --git a/source/dnode/vnode/src/tsdb/tsdbMergeTree.c b/source/dnode/vnode/src/tsdb/tsdbMergeTree.c
index 8c79b47ce3df2521634a738cbf588ca805745881..8bb5d243631ba0b28866d7137f4e8c18b7b6e692 100644
--- a/source/dnode/vnode/src/tsdb/tsdbMergeTree.c
+++ b/source/dnode/vnode/src/tsdb/tsdbMergeTree.c
@@ -629,9 +629,9 @@ int32_t tMergeTreeOpen2(SMergeTree *pMTree, int8_t backward, STsdb* pTsdb, uint6
     pMTree->idStr = idStr;
 
     if (!pMTree->backward) {  // asc
-        tRBTreeCreate(&pMTree->rbt, tLDataIterCmprFn);
+      tRBTreeCreate(&pMTree->rbt, tLDataIterCmprFn);
     } else {  // desc
-        tRBTreeCreate(&pMTree->rbt, tLDataIterDescCmprFn);
+      tRBTreeCreate(&pMTree->rbt, tLDataIterDescCmprFn);
     }
 
     pMTree->pLoadInfo = pBlockLoadInfo;
@@ -639,6 +639,11 @@ int32_t tMergeTreeOpen2(SMergeTree *pMTree, int8_t backward, STsdb* pTsdb, uint6
     pMTree->ignoreEarlierTs = false;
 
     // todo handle other level of stt files, here only deal with the first level stt
+    int32_t size = ((STFileSet*)pCurrentFileSet)->lvlArr[0].size;
+    if (size == 0) {
+      goto _end;
+    }
+
     SSttLvl* pSttLevel = ((STFileSet*)pCurrentFileSet)->lvlArr[0].data[0];
     ASSERT(pSttLevel->level == 0);
 
diff --git a/source/dnode/vnode/src/tsdb/tsdbRead2.c b/source/dnode/vnode/src/tsdb/tsdbRead2.c
index 1dcf5a4b9bcf29bfe2042a14dc6a9065cd4d2382..148a72a084e7333ee76a67650c4c520327825469 100644
--- a/source/dnode/vnode/src/tsdb/tsdbRead2.c
+++ b/source/dnode/vnode/src/tsdb/tsdbRead2.c
@@ -18,6 +18,7 @@
 #include "tsdbDataFileRW.h"
 #include "tsdbFS2.h"
 #include "tsdbMerge.h"
+#include "tsdbUtil2.h"
 #include "tsimplehash.h"
 
 #define ASCENDING_TRAVERSE(o) (o == TSDB_ORDER_ASC)
@@ -61,7 +62,8 @@ typedef struct STableBlockScanInfo {
   TSKEY     lastKey;
   TSKEY     lastKeyInStt;       // last accessed key in stt
   SMapData  mapData;            // block info (compressed)
-  SArray*   pBlockList;         // block data index list, SArray<SBlockIndex>
+  SArray*   pBlockList;         // block data index list, SArray<SBrinRecord>
+  SArray*   pDelData;           // SArray<SDelData>
   SIterInfo iter;               // mem buffer skip list iterator
   SIterInfo iiter;              // imem buffer skip list iterator
   SArray*   delSkyline;         // delete info for this table
@@ -73,6 +75,7 @@ typedef struct STableBlockScanInfo {
 typedef struct SBlockOrderWrapper {
   int64_t uid;
   int64_t offset;
+  STableBlockScanInfo *pInfo;
 } SBlockOrderWrapper;
 
 typedef struct SBlockOrderSupporter {
@@ -123,8 +126,7 @@ typedef struct SLastBlockReader {
 typedef struct SFilesetIter {
   int32_t           numOfFiles;  // number of total files
   int32_t           index;       // current accessed index in the list
-  TFileSetArray*    pFilesetArray;// data file set list
-//  SArray*           pFileList;   // data file list
+  TFileSetArray*    pFilesetList;// data file set list
   int32_t           order;
   SLastBlockReader* pLastBlockReader;  // last file block reader
 } SFilesetIter;
@@ -133,6 +135,7 @@ typedef struct SFileDataBlockInfo {
   // index position in STableBlockScanInfo in order to check whether neighbor block overlaps with it
   uint64_t uid;
   int32_t  tbBlockIdx;
+  SBrinRecord record;
 } SFileDataBlockInfo;
 
 typedef struct SDataBlockIter {
@@ -217,8 +220,8 @@ struct STsdbReader {
   SHashObj**         pIgnoreTables;
   STSchema*          pSchema;      // the newest version schema
   SSHashObj*         pSchemaMap;   // keep the retrieved schema info, to avoid the overhead by repeatly load schema
-  SDataFileReader*      pFileReader;  // the file reader
-  SDelFReader*       pDelFReader;  // the del file reader
+  SDataFileReader*   pFileReader;  // the file reader
+  SDelFReader*   pDelFReader;  // the del file reader, todo remove it
   SArray*            pDelIdx;      // del file block index;
   SBlockInfoBuf      blockInfoBuf;
   EContentData       step;
@@ -536,11 +539,11 @@ static STimeWindow updateQueryTimeWindow(STsdb* pTsdb, STimeWindow* pWindow) {
 
 // init file iterator
 static int32_t initFilesetIterator(SFilesetIter* pIter, TFileSetArray* pFileSetArray, STsdbReader* pReader) {
-  size_t numOfFileset = pFileSetArray->size;
+  size_t numOfFileset = TARRAY2_SIZE(pFileSetArray);
 
   pIter->index = ASCENDING_TRAVERSE(pReader->order) ? -1 : numOfFileset;
   pIter->order = pReader->order;
-  pIter->pFilesetArray = pFileSetArray;
+  pIter->pFilesetList = pFileSetArray;
   pIter->numOfFiles = numOfFileset;
 
   if (pIter->pLastBlockReader == NULL) {
@@ -602,8 +605,7 @@ static int32_t filesetIteratorNext(SFilesetIter* pIter, STsdbReader* pReader, bo
       tsdbDataFileReaderClose(&pReader->pFileReader);
     }
 
-//    pReader->status.pCurrentFileset = (SDFileSet*)taosArrayGet(pIter->pFilesetArray, pIter->index);
-    pReader->status.pCurrentFileset = pIter->pFilesetArray->data[pIter->index];
+    pReader->status.pCurrentFileset = pIter->pFilesetList->data[pIter->index];
 
     STFileObj** pFileObj = pReader->status.pCurrentFileset->farr;
     if (pFileObj[0] != NULL) {
@@ -894,11 +896,17 @@ static int32_t doLoadBlockIndex(STsdbReader* pReader, SDataFileReader* pFileRead
   int32_t i = 0, j = 0;
   while (i < pBlkArray->size && j < numOfTables) {
     pBrinBlk = &pBlkArray->data[i];
-    if (pBrinBlk->minTbid.suid != pReader->suid) {
+    if (pBrinBlk->minTbid.suid > pReader->suid) {  // not include the queried table/super table, quit the loop
+      break;
+    }
+
+    if (pBrinBlk->maxTbid.suid < pReader->suid) {
       i += 1;
       continue;
     }
 
+    ASSERT(pBrinBlk->minTbid.suid >= pReader->suid && pBrinBlk->maxTbid.suid <= pReader->suid);
+
     if (pBrinBlk->minTbid.uid < pList->tableUidList[j]) {
       i += 1;
       continue;
@@ -909,6 +917,7 @@ static int32_t doLoadBlockIndex(STsdbReader* pReader, SDataFileReader* pFileRead
       continue;
     }
 
+    // todo maxTbid.uid == xxx?
     if (pBrinBlk->minTbid.uid == pList->tableUidList[j]) {
       // this block belongs to a table that is not queried.
       STableBlockScanInfo* pScanInfo = getTableBlockScanInfo(pReader->status.pTableMap, pBrinBlk->minTbid.uid, pReader->idStr);
@@ -929,7 +938,7 @@ static int32_t doLoadBlockIndex(STsdbReader* pReader, SDataFileReader* pFileRead
   }
 
   int64_t et2 = taosGetTimestampUs();
-  tsdbDebug("load block index for %d/%d tables completed, elapsed time:%.2f ms, set blockIdx:%.2f ms, size:%.2f Kb %s",
+  tsdbDebug("load block index for %d/%d tables completed, elapsed time:%.2f ms, set BrinBlk:%.2f ms, size:%.2f Kb %s",
             numOfTables, (int32_t)pBlkArray->size, (et1 - st) / 1000.0, (et2 - et1) / 1000.0, pBlkArray->size * sizeof(SBrinBlk) / 1024.0,
             pReader->idStr);
 
@@ -969,20 +978,18 @@ static void cleanupTableScanInfo(SReaderStatus* pStatus) {
 
 static int32_t doLoadFileBlock(STsdbReader* pReader, SArray* pIndexList, SBlockNumber* pBlockNum, SArray* pTableScanInfoList) {
   size_t  sizeInDisk = 0;
-  size_t  numOfTables = taosArrayGetSize(pIndexList);
+  size_t  numOfBlocks = taosArrayGetSize(pIndexList);
 
   int64_t st = taosGetTimestampUs();
   cleanupTableScanInfo(&pReader->status);
 
   // set the flag for the new file
-//  pReader->status.mapDataCleaned = false;
-  for (int32_t i = 0; i < numOfTables; ++i) {
-    SBrinBlk* pBlk = taosArrayGet(pIndexList, i);
+  int32_t i = 0, k = 0;
+  int32_t numOfTables = tSimpleHashGetSize(pReader->status.pTableMap);
 
-    STableBlockScanInfo* pScanInfo = getTableBlockScanInfo(pReader->status.pTableMap, pBlk->minTbid.uid, pReader->idStr);
-    if (pScanInfo == NULL) {
-      return terrno;
-    }
+  while(i < numOfBlocks && k < numOfTables) {
+    SBrinBlk* pBlk = taosArrayGet(pIndexList, i);
+    uint64_t uid = pReader->status.uidList.tableUidList[k];
 
     SBrinBlock block = {0};
     tsdbDataFileReadBrinBlock(pReader->pFileReader, pBlk, &block);
@@ -991,27 +998,48 @@ static int32_t doLoadFileBlock(STsdbReader* pReader, SArray* pIndexList, SBlockN
 //    tsdbReadDataBlk(pReader->pFileReader, pBlockIdx, &pScanInfo->mapData);
 //    taosArrayEnsureCap(pScanInfo->pBlockList, pScanInfo->mapData.nItem);
 
+// todo set the correct size
     sizeInDisk += 0;//pScanInfo->mapData.nData;
 
     int32_t     step = ASCENDING_TRAVERSE(pReader->order) ? 1 : -1;
     STimeWindow w = pReader->window;
+    if (isEmptyQueryTimeWindow(&w)) {
+      continue;
+    }
+
+    STableBlockScanInfo* pScanInfo = getTableBlockScanInfo(pReader->status.pTableMap, uid, pReader->idStr);
     if (ASCENDING_TRAVERSE(pReader->order)) {
       w.skey = pScanInfo->lastKey + step;
     } else {
       w.ekey = pScanInfo->lastKey + step;
     }
 
-    if (isEmptyQueryTimeWindow(&w)) {
-      continue;
-    }
-
-    for (int32_t j = 0; j < block.numRow->size; ++j) {
-      SBrinRecord record = {0};
+    SBrinRecord record = {0};
+    for (int32_t j = 0; j < TARRAY2_SIZE(block.numRow); ++j) {
       tBrinBlockGet(&block, j, &record);
+      {
+        while (record.uid > uid) {
+          k += 1;
+
+          uid = pReader->status.uidList.tableUidList[k];
+          pScanInfo = getTableBlockScanInfo(pReader->status.pTableMap, uid, pReader->idStr);
+
+          if (ASCENDING_TRAVERSE(pReader->order)) {
+            w.skey = pScanInfo->lastKey + step;
+          } else {
+            w.ekey = pScanInfo->lastKey + step;
+          }
+        }
+
+        if (record.uid < uid) {
+          continue;
+        }
+      }
+
+      ASSERT(record.suid == pReader->suid);
 
       // 1. time range check
       if (record.firstKey > w.ekey || record.lastKey < w.skey) {
-//      if (block.minKey.ts > w.ekey || block.maxKey.ts < w.skey) {
         continue;
       }
 
@@ -1022,7 +1050,6 @@ static int32_t doLoadFileBlock(STsdbReader* pReader, SArray* pIndexList, SBlockN
 
 //      SBlockIndex bIndex = {.ordinalIndex = j, .inFileOffset = record.blockOffset};
 //      bIndex.window = (STimeWindow){.skey = record.firstKey, .ekey = record.lastKey};
-
       void* p1 = taosArrayPush(pScanInfo->pBlockList, &record);
       if (p1 == NULL) {
         return TSDB_CODE_OUT_OF_MEMORY;
@@ -1031,7 +1058,10 @@ static int32_t doLoadFileBlock(STsdbReader* pReader, SArray* pIndexList, SBlockN
       pBlockNum->numOfBlocks += 1;
     }
 
-    if (taosArrayGetSize(pScanInfo->pBlockList) > 0) {
+    i += 1;
+
+    STableBlockScanInfo** p = taosArrayGetLast(pTableScanInfoList);
+    if ((p == NULL || (*p)->uid != uid) && taosArrayGetSize(pScanInfo->pBlockList) > 0) {
       taosArrayPush(pTableScanInfoList, &pScanInfo);
     }
   }
@@ -1144,22 +1174,22 @@ static int doBinarySearchKey(TSKEY* keyList, int num, int pos, TSKEY key, int or
   }
 }
 
-static int32_t getEndPosInDataBlock(STsdbReader* pReader, SBlockData* pBlockData, SDataBlk* pBlock, int32_t pos) {
+static int32_t getEndPosInDataBlock(STsdbReader* pReader, SBlockData* pBlockData, SBrinRecord* pRecord, int32_t pos) {
   // NOTE: reverse the order to find the end position in data block
   int32_t endPos = -1;
   bool    asc = ASCENDING_TRAVERSE(pReader->order);
 
-  if (asc && pReader->window.ekey >= pBlock->maxKey.ts) {
-    endPos = pBlock->nRow - 1;
-  } else if (!asc && pReader->window.skey <= pBlock->minKey.ts) {
+  if (asc && pReader->window.ekey >= pRecord->lastKey) {
+    endPos = pRecord->numRow - 1;
+  } else if (!asc && pReader->window.skey <= pRecord->firstKey) {
     endPos = 0;
   } else {
     int64_t key = asc ? pReader->window.ekey : pReader->window.skey;
-    endPos = doBinarySearchKey(pBlockData->aTSKEY, pBlock->nRow, pos, key, pReader->order);
+    endPos = doBinarySearchKey(pBlockData->aTSKEY, pRecord->numRow, pos, key, pReader->order);
   }
 
-  if ((pReader->verRange.maxVer >= pBlock->minVer && pReader->verRange.maxVer < pBlock->maxVer)||
-      (pReader->verRange.minVer <= pBlock->maxVer && pReader->verRange.minVer > pBlock->minVer)) {
+  if ((pReader->verRange.maxVer >= pRecord->firstKeyVer && pReader->verRange.maxVer < pRecord->lastKeyVer)||
+      (pReader->verRange.minVer <= pRecord->lastKeyVer && pReader->verRange.minVer > pRecord->firstKeyVer)) {
     int32_t i = endPos;
 
     if (asc) {
@@ -1169,7 +1199,7 @@ static int32_t getEndPosInDataBlock(STsdbReader* pReader, SBlockData* pBlockData
         }
       }
     } else {
-      for(; i < pBlock->nRow; ++i) {
+      for(; i < pRecord->numRow; ++i) {
         if (pBlockData->aVersion[i] >= pReader->verRange.minVer) {
           break;
         }
@@ -1300,7 +1330,7 @@ static int32_t copyBlockDataToSDataBlock(STsdbReader* pReader) {
 
   SBlockData*         pBlockData = &pStatus->fileBlockData;
   SFileDataBlockInfo* pBlockInfo = getCurrentBlockInfo(pBlockIter);
-  SDataBlk*           pBlock = getCurrentBlock(pBlockIter);
+//  SDataBlk*           pBlock = getCurrentBlock(pBlockIter);
   SSDataBlock*        pResBlock = pReader->resBlockInfo.pResBlock;
   int32_t             numOfOutputCols = pSupInfo->numOfCols;
   int32_t             code = TSDB_CODE_SUCCESS;
@@ -1310,6 +1340,8 @@ static int32_t copyBlockDataToSDataBlock(STsdbReader* pReader) {
   bool    asc = ASCENDING_TRAVERSE(pReader->order);
   int32_t step = asc ? 1 : -1;
 
+  SBrinRecord* pRecord = &pBlockInfo->record;
+
   // no data exists, return directly.
   if (pBlockData->nRow == 0 || pBlockData->aTSKEY == 0) {
     tsdbWarn("%p no need to copy since no data in blockData, table uid:%" PRIu64 " has been dropped, %s", pReader,
@@ -1319,34 +1351,34 @@ static int32_t copyBlockDataToSDataBlock(STsdbReader* pReader) {
   }
 
   // row index of dump info remain the initial position, let's find the appropriate start position.
-  if ((pDumpInfo->rowIndex == 0 && asc) || (pDumpInfo->rowIndex == pBlock->nRow - 1 && (!asc))) {
-    if (asc && pReader->window.skey <= pBlock->minKey.ts && pReader->verRange.minVer <= pBlock->minVer) {
+  if ((pDumpInfo->rowIndex == 0 && asc) || (pDumpInfo->rowIndex == pRecord->numRow - 1 && (!asc))) {
+    if (asc && pReader->window.skey <= pRecord->firstKey && pReader->verRange.minVer <= pRecord->firstKeyVer) {
       // pDumpInfo->rowIndex = 0;
-    } else if (!asc && pReader->window.ekey >= pBlock->maxKey.ts && pReader->verRange.maxVer >= pBlock->maxVer) {
-      // pDumpInfo->rowIndex = pBlock->nRow - 1;
+    } else if (!asc && pReader->window.ekey >= pRecord->lastKey && pReader->verRange.maxVer >= pRecord->lastKeyVer) {
+      // pDumpInfo->rowIndex = pRecord->numRow - 1;
     } else {  // find the appropriate the start position in current block, and set it to be the current rowIndex
-      int32_t pos = asc ? pBlock->nRow - 1 : 0;
+      int32_t pos = asc ? pRecord->numRow - 1 : 0;
       int32_t order = asc ? TSDB_ORDER_DESC : TSDB_ORDER_ASC;
       int64_t key = asc ? pReader->window.skey : pReader->window.ekey;
-      pDumpInfo->rowIndex = doBinarySearchKey(pBlockData->aTSKEY, pBlock->nRow, pos, key, order);
+      pDumpInfo->rowIndex = doBinarySearchKey(pBlockData->aTSKEY, pRecord->numRow, pos, key, order);
 
       if (pDumpInfo->rowIndex < 0) {
         tsdbError(
             "%p failed to locate the start position in current block, global index:%d, table index:%d, brange:%" PRId64
             "-%" PRId64 ", minVer:%" PRId64 ", maxVer:%" PRId64 " %s",
-            pReader, pBlockIter->index, pBlockInfo->tbBlockIdx, pBlock->minKey.ts, pBlock->maxKey.ts, pBlock->minVer,
-            pBlock->maxVer, pReader->idStr);
+            pReader, pBlockIter->index, pBlockInfo->tbBlockIdx, pRecord->firstKey, pRecord->lastKey, pRecord->firstKeyVer,
+            pRecord->lastKeyVer, pReader->idStr);
         return TSDB_CODE_INVALID_PARA;
       }
 
-      ASSERT(pReader->verRange.minVer <= pBlock->maxVer && pReader->verRange.maxVer >= pBlock->minVer);
+      ASSERT(pReader->verRange.minVer <= pRecord->lastKeyVer && pReader->verRange.maxVer >= pRecord->firstKeyVer);
 
       // find the appropriate start position that satisfies the version requirement.
-      if ((pReader->verRange.maxVer >= pBlock->minVer && pReader->verRange.maxVer < pBlock->maxVer)||
-          (pReader->verRange.minVer <= pBlock->maxVer && pReader->verRange.minVer > pBlock->minVer)) {
+      if ((pReader->verRange.maxVer >= pRecord->firstKeyVer && pReader->verRange.maxVer < pRecord->lastKeyVer)||
+          (pReader->verRange.minVer <= pRecord->lastKeyVer && pReader->verRange.minVer > pRecord->firstKeyVer)) {
         int32_t i = pDumpInfo->rowIndex;
         if (asc) {
-          for(; i < pBlock->nRow; ++i) {
+          for(; i < pRecord->numRow; ++i) {
             if (pBlockData->aVersion[i] >= pReader->verRange.minVer) {
               break;
             }
@@ -1365,7 +1397,7 @@ static int32_t copyBlockDataToSDataBlock(STsdbReader* pReader) {
   }
 
   // time window check
-  int32_t endIndex = getEndPosInDataBlock(pReader, pBlockData, pBlock, pDumpInfo->rowIndex);
+  int32_t endIndex = getEndPosInDataBlock(pReader, pBlockData, pRecord, pDumpInfo->rowIndex);
   if (endIndex == -1) {
     setBlockAllDumped(pDumpInfo, pReader->window.ekey, pReader->order);
     return TSDB_CODE_SUCCESS;
@@ -1437,24 +1469,24 @@ static int32_t copyBlockDataToSDataBlock(STsdbReader* pReader) {
   pDumpInfo->rowIndex += step * dumpedRows;
 
   // check if current block are all handled
-  if (pDumpInfo->rowIndex >= 0 && pDumpInfo->rowIndex < pBlock->nRow) {
+  if (pDumpInfo->rowIndex >= 0 && pDumpInfo->rowIndex < pRecord->numRow) {
     int64_t ts = pBlockData->aTSKEY[pDumpInfo->rowIndex];
     if (outOfTimeWindow(ts, &pReader->window)) {  // the remain data has out of query time window, ignore current block
       setBlockAllDumped(pDumpInfo, ts, pReader->order);
     }
   } else {
-    int64_t ts = asc ? pBlock->maxKey.ts : pBlock->minKey.ts;
+    int64_t ts = asc ? pRecord->lastKey : pRecord->firstKey;
     setBlockAllDumped(pDumpInfo, ts, pReader->order);
   }
 
   double elapsedTime = (taosGetTimestampUs() - st) / 1000.0;
   pReader->cost.blockLoadTime += elapsedTime;
 
-  int32_t unDumpedRows = asc ? pBlock->nRow - pDumpInfo->rowIndex : pDumpInfo->rowIndex + 1;
+  int32_t unDumpedRows = asc ? pRecord->numRow - pDumpInfo->rowIndex : pDumpInfo->rowIndex + 1;
   tsdbDebug("%p copy file block to sdatablock, global index:%d, table index:%d, brange:%" PRId64 "-%" PRId64
                 ", rows:%d, remain:%d, minVer:%" PRId64 ", maxVer:%" PRId64 ", uid:%" PRIu64 " elapsed time:%.2f ms, %s",
-            pReader, pBlockIter->index, pBlockInfo->tbBlockIdx, pBlock->minKey.ts, pBlock->maxKey.ts, dumpedRows,
-            unDumpedRows, pBlock->minVer, pBlock->maxVer, pBlockInfo->uid, elapsedTime, pReader->idStr);
+            pReader, pBlockIter->index, pBlockInfo->tbBlockIdx, pRecord->firstKey, pRecord->lastKey, dumpedRows,
+            unDumpedRows, pRecord->firstKeyVer, pRecord->lastKeyVer, pBlockInfo->uid, elapsedTime, pReader->idStr);
 
   return TSDB_CODE_SUCCESS;
 }
@@ -1505,22 +1537,23 @@ static int32_t doLoadFileBlockData(STsdbReader* pReader, SDataBlockIter* pBlockI
   SFileDataBlockInfo* pBlockInfo = getCurrentBlockInfo(pBlockIter);
   SFileBlockDumpInfo* pDumpInfo = &pReader->status.fBlockDumpInfo;
 
-  SDataBlk* pBlock = getCurrentBlock(pBlockIter);
-//  code = tsdbReadDataBlock(pReader->pFileReader, pBlock, pBlockData);
+//  SDataBlk* pBlock = getCurrentBlock(pBlockIter);
+  code = tsdbDataFileReadBlockData(pReader->pFileReader, &pBlockInfo->record, pBlockData);
   if (code != TSDB_CODE_SUCCESS) {
     tsdbError("%p error occurs in loading file block, global index:%d, table index:%d, brange:%" PRId64 "-%" PRId64
-                  ", rows:%d, code:%s %s",
-              pReader, pBlockIter->index, pBlockInfo->tbBlockIdx, pBlock->minKey.ts, pBlock->maxKey.ts, pBlock->nRow,
-              tstrerror(code), pReader->idStr);
+              ", rows:%d, code:%s %s",
+              pReader, pBlockIter->index, pBlockInfo->tbBlockIdx, pBlockInfo->record.firstKey,
+              pBlockInfo->record.lastKey, pBlockInfo->record.numRow, tstrerror(code), pReader->idStr);
     return code;
   }
 
   double elapsedTime = (taosGetTimestampUs() - st) / 1000.0;
 
+  SBrinRecord* pRecord = &pBlockInfo->record;
   tsdbDebug("%p load file block into buffer, global index:%d, index in table block list:%d, brange:%" PRId64 "-%" PRId64
-                ", rows:%d, minVer:%" PRId64 ", maxVer:%" PRId64 ", elapsed time:%.2f ms, %s",
-            pReader, pBlockIter->index, pBlockInfo->tbBlockIdx, pBlock->minKey.ts, pBlock->maxKey.ts, pBlock->nRow,
-            pBlock->minVer, pBlock->maxVer, elapsedTime, pReader->idStr);
+            ", rows:%d, minVer:%" PRId64 ", maxVer:%" PRId64 ", elapsed time:%.2f ms, %s",
+            pReader, pBlockIter->index, pBlockInfo->tbBlockIdx, pRecord->firstKey, pRecord->lastKey, pRecord->numRow,
+            pRecord->firstKeyVer, pRecord->lastKeyVer, elapsedTime, pReader->idStr);
 
   pReader->cost.blockLoadTime += elapsedTime;
   pDumpInfo->allDumped = false;
@@ -1603,6 +1636,7 @@ static int32_t initBlockIterator(STsdbReader* pReader, SDataBlockIter* pBlockIte
   SBlockOrderSupporter sup = {0};
   pBlockIter->numOfBlocks = numOfBlocks;
   taosArrayClear(pBlockIter->blockList);
+
   pBlockIter->pTableMap = pReader->status.pTableMap;
 
   // access data blocks according to the offset of each block in asc/desc order.
@@ -1632,9 +1666,9 @@ static int32_t initBlockIterator(STsdbReader* pReader, SDataBlockIter* pBlockIte
     sup.pDataBlockInfo[sup.numOfTables] = (SBlockOrderWrapper*)buf;
 
     for (int32_t k = 0; k < num; ++k) {
-      SBlockIndex* pIndex = taosArrayGet(pTableScanInfo->pBlockList, k);
+      SBrinRecord* pRecord = taosArrayGet(pTableScanInfo->pBlockList, k);
       sup.pDataBlockInfo[sup.numOfTables][k] =
-          (SBlockOrderWrapper){.uid = pTableScanInfo->uid, .offset = pIndex->inFileOffset};
+          (SBlockOrderWrapper){.uid = pTableScanInfo->uid, .offset = pRecord->blockOffset, .pInfo = pTableScanInfo};
       cnt++;
     }
 
@@ -1650,6 +1684,8 @@ static int32_t initBlockIterator(STsdbReader* pReader, SDataBlockIter* pBlockIte
   if (sup.numOfTables == 1) {
     for (int32_t i = 0; i < numOfBlocks; ++i) {
       SFileDataBlockInfo blockInfo = {.uid = sup.pDataBlockInfo[0][i].uid, .tbBlockIdx = i};
+      blockInfo.record = *(SBrinRecord*)taosArrayGet(sup.pDataBlockInfo[0][i].pInfo->pBlockList, i);
+
       taosArrayPush(pBlockIter->blockList, &blockInfo);
     }
 
@@ -1720,15 +1756,15 @@ static bool blockIteratorNext(SDataBlockIter* pBlockIter, const char* idStr) {
 /**
  * This is an two rectangles overlap cases.
  */
-static int32_t dataBlockPartiallyRequired(STimeWindow* pWindow, SVersionRange* pVerRange, SDataBlk* pBlock) {
-  return (pWindow->ekey < pBlock->maxKey.ts && pWindow->ekey >= pBlock->minKey.ts) ||
-         (pWindow->skey > pBlock->minKey.ts && pWindow->skey <= pBlock->maxKey.ts) ||
-         (pVerRange->minVer > pBlock->minVer && pVerRange->minVer <= pBlock->maxVer) ||
-         (pVerRange->maxVer < pBlock->maxVer && pVerRange->maxVer >= pBlock->minVer);
+static int32_t dataBlockPartiallyRequired(STimeWindow* pWindow, SVersionRange* pVerRange, SFileDataBlockInfo* pBlock) {
+  return (pWindow->ekey < pBlock->record.lastKey && pWindow->ekey >= pBlock->record.firstKey) ||
+         (pWindow->skey > pBlock->record.firstKey && pWindow->skey <= pBlock->record.lastKey) ||
+         (pVerRange->minVer > pBlock->record.firstKeyVer && pVerRange->minVer <= pBlock->record.lastKeyVer) ||
+         (pVerRange->maxVer < pBlock->record.lastKeyVer && pVerRange->maxVer >= pBlock->record.firstKeyVer);
 }
 
 static bool getNeighborBlockOfSameTable(SFileDataBlockInfo* pBlockInfo, STableBlockScanInfo* pTableBlockScanInfo,
-                                        int32_t* nextIndex, int32_t order, SBlockIndex* pBlockIndex) {
+                                        int32_t* nextIndex, int32_t order, SBrinRecord* pRecord) {
   bool asc = ASCENDING_TRAVERSE(order);
   if (asc && pBlockInfo->tbBlockIdx >= taosArrayGetSize(pTableBlockScanInfo->pBlockList) - 1) {
     return false;
@@ -1739,8 +1775,11 @@ static bool getNeighborBlockOfSameTable(SFileDataBlockInfo* pBlockInfo, STableBl
   }
 
   int32_t step = asc ? 1 : -1;
-  *nextIndex = pBlockInfo->tbBlockIdx + step;
-  *pBlockIndex = *(SBlockIndex*)taosArrayGet(pTableBlockScanInfo->pBlockList, *nextIndex);
+//  *nextIndex = pBlockInfo->tbBlockIdx + step;
+//  *pBlockIndex = *(SBlockIndex*)taosArrayGet(pTableBlockScanInfo->pBlockList, *nextIndex);
+  SBrinRecord* p = taosArrayGet(pTableBlockScanInfo->pBlockList, pBlockInfo->tbBlockIdx + step);
+  memcpy(pRecord, p, sizeof(SBrinRecord));
+
   //  tMapDataGetItemByIdx(&pTableBlockScanInfo->mapData, pIndex->ordinalIndex, pBlock, tGetDataBlk);
   return true;
 }
@@ -1791,16 +1830,25 @@ static bool overlapWithNeighborBlock(SDataBlk* pBlock, SBlockIndex* pNeighborBlo
   }
 }
 
-static bool bufferDataInFileBlockGap(int32_t order, TSDBKEY key, SDataBlk* pBlock) {
+static bool overlapWithNeighborBlock2(SFileDataBlockInfo* pBlock, SBrinRecord* pRec, int32_t order) {
+  // it is the last block in current file, no chance to overlap with neighbor blocks.
+  if (ASCENDING_TRAVERSE(order)) {
+    return pBlock->record.lastKey == pRec->firstKey;
+  } else {
+    return pBlock->record.firstKey == pRec->lastKey;
+  }
+}
+
+static bool bufferDataInFileBlockGap(int32_t order, TSDBKEY key, SFileDataBlockInfo* pBlock) {
   bool ascScan = ASCENDING_TRAVERSE(order);
 
-  return (ascScan && (key.ts != TSKEY_INITIAL_VAL && key.ts <= pBlock->minKey.ts)) ||
-         (!ascScan && (key.ts != TSKEY_INITIAL_VAL && key.ts >= pBlock->maxKey.ts));
+  return (ascScan && (key.ts != TSKEY_INITIAL_VAL && key.ts <= pBlock->record.firstKey)) ||
+         (!ascScan && (key.ts != TSKEY_INITIAL_VAL && key.ts >= pBlock->record.lastKey));
 }
 
-static bool keyOverlapFileBlock(TSDBKEY key, SDataBlk* pBlock, SVersionRange* pVerRange) {
-  return (key.ts >= pBlock->minKey.ts && key.ts <= pBlock->maxKey.ts) && (pBlock->maxVer >= pVerRange->minVer) &&
-         (pBlock->minVer <= pVerRange->maxVer);
+static bool keyOverlapFileBlock(TSDBKEY key, SFileDataBlockInfo* pBlock, SVersionRange* pVerRange) {
+  return (key.ts >= pBlock->record.firstKey && key.ts <= pBlock->record.lastKey) &&
+         (pBlock->record.lastKeyVer >= pVerRange->minVer) && (pBlock->record.firstKeyVer <= pVerRange->maxVer);
 }
 
 static bool doCheckforDatablockOverlap(STableBlockScanInfo* pBlockScanInfo, const SDataBlk* pBlock,
@@ -1875,31 +1923,33 @@ typedef struct {
   bool moreThanCapcity;
 } SDataBlockToLoadInfo;
 
-static void getBlockToLoadInfo(SDataBlockToLoadInfo* pInfo, SFileDataBlockInfo* pBlockInfo, SDataBlk* pBlock,
+static void getBlockToLoadInfo(SDataBlockToLoadInfo* pInfo, SFileDataBlockInfo* pBlockInfo,
                                STableBlockScanInfo* pScanInfo, TSDBKEY keyInBuf, SLastBlockReader* pLastBlockReader,
                                STsdbReader* pReader) {
   int32_t     neighborIndex = 0;
-  SBlockIndex bIndex = {0};
+  SBrinRecord rec = {0};
 
-  bool hasNeighbor = getNeighborBlockOfSameTable(pBlockInfo, pScanInfo, &neighborIndex, pReader->order, &bIndex);
+  bool hasNeighbor = getNeighborBlockOfSameTable(pBlockInfo, pScanInfo, &neighborIndex, pReader->order, &rec);
 
   // overlap with neighbor
   if (hasNeighbor) {
-    pInfo->overlapWithNeighborBlock = overlapWithNeighborBlock(pBlock, &bIndex, pReader->order);
+//    pInfo->overlapWithNeighborBlock = overlapWithNeighborBlock(pBlock, &bIndex, pReader->order);
+    pInfo->overlapWithNeighborBlock = overlapWithNeighborBlock2(pBlockInfo, &rec, pReader->order);
   }
 
+  // todo:
   // has duplicated ts of different version in this block
-  pInfo->hasDupTs = (pBlock->nSubBlock == 1) ? pBlock->hasDup : true;
-  pInfo->overlapWithDelInfo = overlapWithDelSkyline(pScanInfo, pBlock, pReader->order);
+  pInfo->hasDupTs = 0;//(pBlock->nSubBlock == 1) ? pBlock->hasDup : true;
+  pInfo->overlapWithDelInfo = false;//overlapWithDelSkyline(pScanInfo, pBlockInfo, pReader->order);
 
   if (hasDataInLastBlock(pLastBlockReader)) {
     int64_t tsLast = getCurrentKeyInLastBlock(pLastBlockReader);
-    pInfo->overlapWithLastBlock = !(pBlock->maxKey.ts < tsLast || pBlock->minKey.ts > tsLast);
+    pInfo->overlapWithLastBlock = !(pBlockInfo->record.lastKey < tsLast || pBlockInfo->record.firstKey > tsLast);
   }
 
-  pInfo->moreThanCapcity = pBlock->nRow > pReader->resBlockInfo.capacity;
-  pInfo->partiallyRequired = dataBlockPartiallyRequired(&pReader->window, &pReader->verRange, pBlock);
-  pInfo->overlapWithKeyInBuf = keyOverlapFileBlock(keyInBuf, pBlock, &pReader->verRange);
+  pInfo->moreThanCapcity = pBlockInfo->record.numRow > pReader->resBlockInfo.capacity;
+  pInfo->partiallyRequired = dataBlockPartiallyRequired(&pReader->window, &pReader->verRange, pBlockInfo);
+  pInfo->overlapWithKeyInBuf = keyOverlapFileBlock(keyInBuf, pBlockInfo, &pReader->verRange);
 }
 
 // 1. the version of all rows should be less than the endVersion
@@ -1908,10 +1958,10 @@ static void getBlockToLoadInfo(SDataBlockToLoadInfo* pInfo, SFileDataBlockInfo*
 // 4. output buffer should be large enough to hold all rows in current block
 // 5. delete info should not overlap with current block data
 // 6. current block should not contain the duplicated ts
-static bool fileBlockShouldLoad(STsdbReader* pReader, SFileDataBlockInfo* pBlockInfo, SDataBlk* pBlock,
+static bool fileBlockShouldLoad(STsdbReader* pReader, SFileDataBlockInfo* pBlockInfo,
                                 STableBlockScanInfo* pScanInfo, TSDBKEY keyInBuf, SLastBlockReader* pLastBlockReader) {
   SDataBlockToLoadInfo info = {0};
-  getBlockToLoadInfo(&info, pBlockInfo, pBlock, pScanInfo, keyInBuf, pLastBlockReader, pReader);
+  getBlockToLoadInfo(&info, pBlockInfo, pScanInfo, keyInBuf, pLastBlockReader, pReader);
 
   bool loadDataBlock =
       (info.overlapWithNeighborBlock || info.hasDupTs || info.partiallyRequired || info.overlapWithKeyInBuf ||
@@ -1933,7 +1983,7 @@ static bool fileBlockShouldLoad(STsdbReader* pReader, SFileDataBlockInfo* pBlock
 static bool isCleanFileDataBlock(STsdbReader* pReader, SFileDataBlockInfo* pBlockInfo, SDataBlk* pBlock,
                                  STableBlockScanInfo* pScanInfo, TSDBKEY keyInBuf, SLastBlockReader* pLastBlockReader) {
   SDataBlockToLoadInfo info = {0};
-  getBlockToLoadInfo(&info, pBlockInfo, pBlock, pScanInfo, keyInBuf, pLastBlockReader, pReader);
+  getBlockToLoadInfo(&info, pBlockInfo, pScanInfo, keyInBuf, pLastBlockReader, pReader);
   bool isCleanFileBlock = !(info.overlapWithNeighborBlock || info.hasDupTs || info.overlapWithKeyInBuf ||
                             info.overlapWithDelInfo || info.overlapWithLastBlock);
   return isCleanFileBlock;
@@ -2594,13 +2644,41 @@ static int32_t doMergeMultiLevelRows(STsdbReader* pReader, STableBlockScanInfo*
   return code;
 }
 
+int32_t doInitMemDataIter(STsdbReader* pReader, STbData** pData, STableBlockScanInfo* pBlockScanInfo, TSDBKEY* pKey,
+                          SMemTable* pMem, STbDataIter** pIter, const char* type) {
+  int32_t code = TSDB_CODE_SUCCESS;
+  int32_t backward = (!ASCENDING_TRAVERSE(pReader->order));
+
+  if (pMem != NULL) {
+    *pData = tsdbGetTbDataFromMemTable(pMem, pReader->suid, pBlockScanInfo->uid);
+
+    if ((*pData) != NULL) {
+      code = tsdbTbDataIterCreate((*pData), pKey, backward, pIter);
+      if (code == TSDB_CODE_SUCCESS) {
+        pBlockScanInfo->iter.hasVal = (tsdbTbDataIterGet(*pIter) != NULL);
+
+        tsdbDebug("%p uid:%" PRIu64 ", check data in %s from skey:%" PRId64 ", order:%d, ts range in buf:%" PRId64
+                  "-%" PRId64 " %s",
+                  pReader, pBlockScanInfo->uid, type, pKey->ts, pReader->order, (*pData)->minKey, (*pData)->maxKey,
+                  pReader->idStr);
+      } else {
+        tsdbError("%p uid:%" PRIu64 ", failed to create iterator for %s, code:%s, %s", pReader, pBlockScanInfo->uid,
+                  type, tstrerror(code), pReader->idStr);
+        return code;
+      }
+    }
+  } else {
+    tsdbDebug("%p uid:%" PRIu64 ", no data in %s, %s", pReader, pBlockScanInfo->uid, type, pReader->idStr);
+  }
+
+  return code;
+}
+
 static int32_t initMemDataIterator(STableBlockScanInfo* pBlockScanInfo, STsdbReader* pReader) {
   if (pBlockScanInfo->iterInit) {
     return TSDB_CODE_SUCCESS;
   }
 
-  int32_t code = TSDB_CODE_SUCCESS;
-
   TSDBKEY startKey = {0};
   if (ASCENDING_TRAVERSE(pReader->order)) {
     startKey = (TSDBKEY){.ts = pBlockScanInfo->lastKey + 1, .version = pReader->verRange.minVer};
@@ -2608,52 +2686,22 @@ static int32_t initMemDataIterator(STableBlockScanInfo* pBlockScanInfo, STsdbRea
     startKey = (TSDBKEY){.ts = pBlockScanInfo->lastKey - 1, .version = pReader->verRange.maxVer};
   }
 
-  int32_t backward = (!ASCENDING_TRAVERSE(pReader->order));
-  int64_t st = 0;
-
   STbData* d = NULL;
-  if (pReader->pReadSnap->pMem != NULL) {
-    d = tsdbGetTbDataFromMemTable(pReader->pReadSnap->pMem, pReader->suid, pBlockScanInfo->uid);
-    if (d != NULL) {
-      code = tsdbTbDataIterCreate(d, &startKey, backward, &pBlockScanInfo->iter.iter);
-      if (code == TSDB_CODE_SUCCESS) {
-        pBlockScanInfo->iter.hasVal = (tsdbTbDataIterGet(pBlockScanInfo->iter.iter) != NULL);
 
-        tsdbDebug("%p uid:%" PRIu64 ", check data in mem from skey:%" PRId64 ", order:%d, ts range in buf:%" PRId64
-                      "-%" PRId64 " %s",
-                  pReader, pBlockScanInfo->uid, startKey.ts, pReader->order, d->minKey, d->maxKey, pReader->idStr);
-      } else {
-        tsdbError("%p uid:%" PRIu64 ", failed to create iterator for imem, code:%s, %s", pReader, pBlockScanInfo->uid,
-                  tstrerror(code), pReader->idStr);
-        return code;
-      }
-    }
-  } else {
-    tsdbDebug("%p uid:%" PRIu64 ", no data in mem, %s", pReader, pBlockScanInfo->uid, pReader->idStr);
+  int32_t code = doInitMemDataIter(pReader, &d, pBlockScanInfo, &startKey, pReader->pReadSnap->pMem,
+                                   &pBlockScanInfo->iter.iter, "mem");
+  if (code != TSDB_CODE_SUCCESS) {
+    return code;
   }
 
   STbData* di = NULL;
-  if (pReader->pReadSnap->pIMem != NULL) {
-    di = tsdbGetTbDataFromMemTable(pReader->pReadSnap->pIMem, pReader->suid, pBlockScanInfo->uid);
-    if (di != NULL) {
-      code = tsdbTbDataIterCreate(di, &startKey, backward, &pBlockScanInfo->iiter.iter);
-      if (code == TSDB_CODE_SUCCESS) {
-        pBlockScanInfo->iiter.hasVal = (tsdbTbDataIterGet(pBlockScanInfo->iiter.iter) != NULL);
-
-        tsdbDebug("%p uid:%" PRIu64 ", check data in imem from skey:%" PRId64 ", order:%d, ts range in buf:%" PRId64
-                      "-%" PRId64 " %s",
-                  pReader, pBlockScanInfo->uid, startKey.ts, pReader->order, di->minKey, di->maxKey, pReader->idStr);
-      } else {
-        tsdbError("%p uid:%" PRIu64 ", failed to create iterator for mem, code:%s, %s", pReader, pBlockScanInfo->uid,
-                  tstrerror(code), pReader->idStr);
-        return code;
-      }
-    }
-  } else {
-    tsdbDebug("%p uid:%" PRIu64 ", no data in imem, %s", pReader, pBlockScanInfo->uid, pReader->idStr);
+  code = doInitMemDataIter(pReader, &di, pBlockScanInfo, &startKey, pReader->pReadSnap->pIMem,
+                           &pBlockScanInfo->iiter.iter, "imem");
+  if (code != TSDB_CODE_SUCCESS) {
+    return code;
   }
 
-  st = taosGetTimestampUs();
+  int64_t st = taosGetTimestampUs();
   initDelSkylineIterator(pBlockScanInfo, pReader, d, di);
   pReader->cost.initDelSkylineIterTime += (taosGetTimestampUs() - st) / 1000.0;
 
@@ -2815,17 +2863,18 @@ static int32_t loadNeighborIfOverlap(SFileDataBlockInfo* pBlockInfo, STableBlock
   int32_t     code = TSDB_CODE_SUCCESS;
   int32_t     step = ASCENDING_TRAVERSE(pReader->order) ? 1 : -1;
   int32_t     nextIndex = -1;
-  SBlockIndex nxtBIndex = {0};
+//  SBlockIndex nxtBIndex = {0};
 
   *loadNeighbor = false;
   SDataBlk* pBlock = getCurrentBlock(&pReader->status.blockIter);
 
-  bool hasNeighbor = getNeighborBlockOfSameTable(pBlockInfo, pBlockScanInfo, &nextIndex, pReader->order, &nxtBIndex);
+  SBrinRecord rec = {0};
+  bool hasNeighbor = getNeighborBlockOfSameTable(pBlockInfo, pBlockScanInfo, &nextIndex, pReader->order, &rec);
   if (!hasNeighbor) {  // do nothing
     return code;
   }
 
-  if (overlapWithNeighborBlock(pBlock, &nxtBIndex, pReader->order)) {  // load next block
+  if (overlapWithNeighborBlock2(pBlockInfo, &rec, pReader->order)) {  // load next block
     SReaderStatus*  pStatus = &pReader->status;
     SDataBlockIter* pBlockIter = &pStatus->blockIter;
 
@@ -2997,19 +3046,9 @@ int32_t initDelSkylineIterator(STableBlockScanInfo* pBlockScanInfo, STsdbReader*
   }
 
   int32_t code = 0;
-  SArray* pDelData = taosArrayInit(4, sizeof(SDelData));
-
-  SDelFile* pDelFile = pReader->pReadSnap->fs.pDelFile;
-  if (pDelFile && taosArrayGetSize(pReader->pDelIdx) > 0) {
-    SDelIdx  idx = {.suid = pReader->suid, .uid = pBlockScanInfo->uid};
-    SDelIdx* pIdx = taosArraySearch(pReader->pDelIdx, &idx, tCmprDelIdx, TD_EQ);
 
-    if (pIdx != NULL) {
-      code = tsdbReadDelDatav1(pReader->pDelFReader, pIdx, pDelData, pReader->verRange.maxVer);
-    }
-    if (code != TSDB_CODE_SUCCESS) {
-      goto _err;
-    }
+  if (pBlockScanInfo->pDelData == NULL) {
+    pBlockScanInfo->pDelData = taosArrayInit(4, sizeof(SDelData));
   }
 
   SDelData* p = NULL;
@@ -3017,7 +3056,7 @@ int32_t initDelSkylineIterator(STableBlockScanInfo* pBlockScanInfo, STsdbReader*
     p = pMemTbData->pHead;
     while (p) {
       if (p->version <= pReader->verRange.maxVer) {
-        taosArrayPush(pDelData, p);
+        taosArrayPush(pBlockScanInfo->pDelData, p);
       }
 
       p = p->pNext;
@@ -3028,18 +3067,19 @@ int32_t initDelSkylineIterator(STableBlockScanInfo* pBlockScanInfo, STsdbReader*
     p = piMemTbData->pHead;
     while (p) {
       if (p->version <= pReader->verRange.maxVer) {
-        taosArrayPush(pDelData, p);
+        taosArrayPush(pBlockScanInfo->pDelData, p);
       }
       p = p->pNext;
     }
   }
 
-  if (taosArrayGetSize(pDelData) > 0) {
+  int32_t numOfElems = taosArrayGetSize(pBlockScanInfo->pDelData);
+  if (numOfElems > 0) {
     pBlockScanInfo->delSkyline = taosArrayInit(4, sizeof(TSDBKEY));
-    code = tsdbBuildDeleteSkyline(pDelData, 0, (int32_t)(taosArrayGetSize(pDelData) - 1), pBlockScanInfo->delSkyline);
+    code = tsdbBuildDeleteSkyline(pBlockScanInfo->pDelData, 0, numOfElems - 1, pBlockScanInfo->delSkyline);
   }
 
-  taosArrayDestroy(pDelData);
+  pBlockScanInfo->pDelData = taosArrayDestroy(pBlockScanInfo->pDelData);
   int32_t index = getInitialDelIndex(pBlockScanInfo->delSkyline, pReader->order);
 
   pBlockScanInfo->iter.index = index;
@@ -3049,9 +3089,9 @@ int32_t initDelSkylineIterator(STableBlockScanInfo* pBlockScanInfo, STsdbReader*
 
   return code;
 
-  _err:
-  taosArrayDestroy(pDelData);
-  return code;
+//  _err:
+//  taosArrayDestroy(pBlockScanInfo->pDelData);
+//  return code;
 }
 
 TSDBKEY getCurrentKeyInBuf(STableBlockScanInfo* pScanInfo, STsdbReader* pReader) {
@@ -3140,25 +3180,51 @@ static int32_t moveToNextFile(STsdbReader* pReader, SBlockNumber* pBlockNum, SAr
 
   taosArrayDestroy(pIndexList);
 
-  if (pReader->pReadSnap != NULL) {
-    SDelFile* pDelFile = pReader->pReadSnap->fs.pDelFile;
-    if (pReader->pDelFReader == NULL && pDelFile != NULL) {
-      int32_t code = tsdbDelFReaderOpen(&pReader->pDelFReader, pDelFile, pReader->pTsdb);
-      if (code != TSDB_CODE_SUCCESS) {
-        return code;
-      }
+  STFileObj* pTombFileObj = pReader->status.pCurrentFileset->farr[3];
+  if (pTombFileObj!= NULL) {
+      const TTombBlkArray* pBlkArray = NULL;
 
-      pReader->pDelIdx = taosArrayInit(4, sizeof(SDelIdx));
-      if (pReader->pDelIdx == NULL) {
-        code = TSDB_CODE_OUT_OF_MEMORY;
-        return code;
-      }
+      int32_t code = tsdbDataFileReadTombBlk(pReader->pFileReader, &pBlkArray);
+      int32_t i = 0, j = 0;
+
+      // todo find the correct start position.
+
+      while (i < pBlkArray->size && j < numOfTables) {
+        STombBlock block = {0};
+        code = tsdbDataFileReadTombBlock(pReader->pFileReader, &pBlkArray->data[i], &block);
+        if (code != TSDB_CODE_SUCCESS) {
+          return code;
+        }
+
+        uint64_t uid = pReader->status.uidList.tableUidList[j];
+        STableBlockScanInfo* pScanInfo = getTableBlockScanInfo(pReader->status.pTableMap, uid, pReader->idStr);
+
+        STombRecord record = {0};
+        for(int32_t k = 0; k < block.suid->size; ++k) {
+          code = tTombBlockGet(&block, k, &record);
+
+          {
+            while(record.uid > uid) {
+              j += 1;
+              uid = pReader->status.uidList.tableUidList[j];
+              pScanInfo = getTableBlockScanInfo(pReader->status.pTableMap, uid, pReader->idStr);
+            }
+
+            if (record.uid < uid) {
+              continue;
+            }
+          }
+
+          ASSERT(record.suid == pReader->suid);
+
+          if (record.version <= pReader->verRange.maxVer) {
+            SDelData delData = {.version = record.version, .sKey = record.skey, .eKey = record.ekey};
+            taosArrayPush(pScanInfo->pDelData, &delData);
+          }
+        }
+
+        i += 1;
 
-      code = tsdbReadDelIdx(pReader->pDelFReader, pReader->pDelIdx);
-      if (code != TSDB_CODE_SUCCESS) {
-        taosArrayDestroy(pReader->pDelIdx);
-        return code;
-      }
     }
   }
 
@@ -3278,10 +3344,9 @@ static int32_t doBuildDataBlock(STsdbReader* pReader) {
   STableBlockScanInfo* pScanInfo = NULL;
   SFileDataBlockInfo*  pBlockInfo = getCurrentBlockInfo(pBlockIter);
   SLastBlockReader*    pLastBlockReader = pReader->status.fileIter.pLastBlockReader;
-  SDataBlk*            pBlock = getCurrentBlock(pBlockIter);
 
   if (pReader->pIgnoreTables && taosHashGet(*pReader->pIgnoreTables, &pBlockInfo->uid, sizeof(pBlockInfo->uid))) {
-    setBlockAllDumped(&pStatus->fBlockDumpInfo, pBlock->maxKey.ts, pReader->order);
+    setBlockAllDumped(&pStatus->fBlockDumpInfo, pBlockInfo->record.lastKey, pReader->order);
     return code;
   }
 
@@ -3294,11 +3359,10 @@ static int32_t doBuildDataBlock(STsdbReader* pReader) {
     return terrno;
   }
 
-
   initLastBlockReader(pLastBlockReader, pScanInfo, pReader);
   TSDBKEY keyInBuf = getCurrentKeyInBuf(pScanInfo, pReader);
 
-  if (fileBlockShouldLoad(pReader, pBlockInfo, pBlock, pScanInfo, keyInBuf, pLastBlockReader)) {
+  if (fileBlockShouldLoad(pReader, pBlockInfo, pScanInfo, keyInBuf, pLastBlockReader)) {
     code = doLoadFileBlockData(pReader, pBlockIter, &pStatus->fileBlockData, pScanInfo->uid);
     if (code != TSDB_CODE_SUCCESS) {
       return code;
@@ -3306,16 +3370,16 @@ static int32_t doBuildDataBlock(STsdbReader* pReader) {
 
     // build composed data block
     code = buildComposedDataBlock(pReader);
-  } else if (bufferDataInFileBlockGap(pReader->order, keyInBuf, pBlock)) {
+  } else if (bufferDataInFileBlockGap(pReader->order, keyInBuf, pBlockInfo)) {
     // data in memory that are earlier than current file block
     // rows in buffer should be less than the file block in asc, greater than file block in desc
-    int64_t endKey = (ASCENDING_TRAVERSE(pReader->order)) ? pBlock->minKey.ts : pBlock->maxKey.ts;
+    int64_t endKey = (ASCENDING_TRAVERSE(pReader->order)) ? pBlockInfo->record.firstKey : pBlockInfo->record.lastKey;
     code = buildDataBlockFromBuf(pReader, pScanInfo, endKey);
   } else {
     if (hasDataInLastBlock(pLastBlockReader) && !ASCENDING_TRAVERSE(pReader->order)) {
       // only return the rows in last block
       int64_t tsLast = getCurrentKeyInLastBlock(pLastBlockReader);
-      ASSERT(tsLast >= pBlock->maxKey.ts);
+      ASSERT(tsLast >= pBlockInfo->record.lastKey);
 
       SBlockData* pBData = &pReader->status.fileBlockData;
       tBlockDataReset(pBData);
@@ -3354,20 +3418,20 @@ static int32_t doBuildDataBlock(STsdbReader* pReader) {
       }
     } else {  // whole block is required, return it directly
       SDataBlockInfo* pInfo = &pReader->resBlockInfo.pResBlock->info;
-      pInfo->rows = pBlock->nRow;
+      pInfo->rows = pBlockInfo->record.numRow;
       pInfo->id.uid = pScanInfo->uid;
       pInfo->dataLoad = 0;
-      pInfo->window = (STimeWindow){.skey = pBlock->minKey.ts, .ekey = pBlock->maxKey.ts};
+      pInfo->window = (STimeWindow){.skey = pBlockInfo->record.firstKey, .ekey = pBlockInfo->record.lastKey};
       setComposedBlockFlag(pReader, false);
-      setBlockAllDumped(&pStatus->fBlockDumpInfo, pBlock->maxKey.ts, pReader->order);
+      setBlockAllDumped(&pStatus->fBlockDumpInfo, pBlockInfo->record.lastKey, pReader->order);
 
       // update the last key for the corresponding table
       pScanInfo->lastKey = ASCENDING_TRAVERSE(pReader->order) ? pInfo->window.ekey : pInfo->window.skey;
       tsdbDebug("%p uid:%" PRIu64
-                    " clean file block retrieved from file, global index:%d, "
-                    "table index:%d, rows:%d, brange:%" PRId64 "-%" PRId64 ", %s",
-                pReader, pScanInfo->uid, pBlockIter->index, pBlockInfo->tbBlockIdx, pBlock->nRow, pBlock->minKey.ts,
-                pBlock->maxKey.ts, pReader->idStr);
+                " clean file block retrieved from file, global index:%d, "
+                "table index:%d, rows:%d, brange:%" PRId64 "-%" PRId64 ", %s",
+                pReader, pScanInfo->uid, pBlockIter->index, pBlockInfo->tbBlockIdx, pBlockInfo->record.numRow,
+                pBlockInfo->record.firstKey, pBlockInfo->record.lastKey, pReader->idStr);
     }
   }
 
@@ -3405,7 +3469,6 @@ static int32_t doSumFileBlockRows(STsdbReader* pReader, SDataFReader* pFileReade
 
     STableBlockScanInfo* pScanInfo = *p;
     tMapDataReset(&pScanInfo->mapData);
-//    tsdbReadDataBlk(pReader->pFileReader, pBlockIdx, &pScanInfo->mapData);
 
     SDataBlk block = {0};
     for (int32_t j = 0; j < pScanInfo->mapData.nItem; ++j) {