diff --git a/src/tsdb/inc/tsdbReadImpl.h b/src/tsdb/inc/tsdbReadImpl.h
index 5ea96a24281c988c9dad0a4095d6fa3ba9a3e419..38ad580a579eeccb2635a682966e69d9e97cbb51 100644
--- a/src/tsdb/inc/tsdbReadImpl.h
+++ b/src/tsdb/inc/tsdbReadImpl.h
@@ -122,6 +122,7 @@ typedef struct {
   uint8_t  offsetH;
   char     padding[1];
 } SBlockColV0;
+
 typedef struct {
   int16_t  colId;
   int32_t  len;
@@ -239,7 +240,7 @@ int   tsdbLoadBlockInfo(SReadH *pReadh, void **pTarget, int32_t *extendedLen);
 int   tsdbLoadBlockData(SReadH *pReadh, SBlock *pBlock, SBlockInfo *pBlockInfo);
 int   tsdbLoadBlockDataCols(SReadH *pReadh, SBlock *pBlock, SBlockInfo *pBlkInfo, int16_t *colIds, int numOfColsIds);
 int   tsdbLoadBlockStatis(SReadH *pReadh, SBlock *pBlock);
-// int   tsdbLoadBlockHead(SReadH *pReadh, SBlock *pBlock);
+int   tsdbLoadBlockOffset(SReadH *pReadh, SBlock *pBlock);
 int   tsdbEncodeSBlockIdx(void **buf, SBlockIdx *pIdx);
 void *tsdbDecodeSBlockIdx(void *buf, SBlockIdx *pIdx);
 void  tsdbGetBlockStatis(SReadH *pReadh, SDataStatis *pStatis, int numOfCols, SBlock *pBlock);
diff --git a/src/tsdb/src/tsdbFS.c b/src/tsdb/src/tsdbFS.c
index 2755b42673c5ebe1e397f7fb2ab8168e6d9bcc67..60c73e2d27019cf2e78926fc4c33b976619c8a7b 100644
--- a/src/tsdb/src/tsdbFS.c
+++ b/src/tsdb/src/tsdbFS.c
@@ -985,7 +985,7 @@ static bool tsdbIsTFileInFS(STsdbFS *pfs, const TFILE *pf) {
   SDFileSet *pSet;
 
   while ((pSet = tsdbFSIterNext(&fsiter))) {
-    for (TSDB_FILE_T ftype = 0; ftype < TSDB_FILE_MAX; ftype++) {
+    for (TSDB_FILE_T ftype = 0; ftype < pSet->nFiles; ftype++) {
       SDFile *pDFile = TSDB_DFILE_IN_SET(pSet, ftype);
       if (tfsIsSameFile(pf, TSDB_FILE_F(pDFile))) {
         return true;
diff --git a/src/tsdb/src/tsdbReadImpl.c b/src/tsdb/src/tsdbReadImpl.c
index 76b86d71e7717cc4085a9b141e6195c9a6782ade..20e89ac8636e26cca0fcd371a89b6a437d9c3ea8 100644
--- a/src/tsdb/src/tsdbReadImpl.c
+++ b/src/tsdb/src/tsdbReadImpl.c
@@ -25,6 +25,8 @@ static int  tsdbCheckAndDecodeColumnData(SDataCol *pDataCol, void *content, int3
 static int  tsdbLoadBlockDataColsImpl(SReadH *pReadh, SBlock *pBlock, SDataCols *pDataCols, int16_t *colIds,
                                       int numOfColIds);
 static int  tsdbLoadColData(SReadH *pReadh, SDFile *pDFile, SBlock *pBlock, SBlockCol *pBlockCol, SDataCol *pDataCol);
+static int  tsdbLoadBlockStatisFromDFile(SReadH *pReadh, SBlock *pBlock);
+static int  tsdbLoadBlockStatisFromAggr(SReadH *pReadh, SBlock *pBlock);
 
 int tsdbInitReadH(SReadH *pReadh, STsdbRepo *pRepo) {
   ASSERT(pReadh != NULL && pRepo != NULL);
@@ -492,23 +494,22 @@ static int tsdbLoadBlockStatisFromAggr(SReadH *pReadh, SBlock *pBlock) {
 int tsdbLoadBlockStatis(SReadH *pReadh, SBlock *pBlock) {
   ASSERT(pBlock->numOfSubBlocks <= 1);
 
-  if (pBlock->blkVer == TSDB_SBLK_VER_0) {
-    return tsdbLoadBlockStatisFromDFile(pReadh, pBlock);
-  }
-  if (tsdbLoadBlockStatisFromDFile(pReadh, pBlock) < 0) {
-    return -1;
+  if (pBlock->blkVer > TSDB_SBLK_VER_0) {
+    tsdbLoadBlockStatisFromAggr(pReadh, pBlock);
+    
   }
-  return tsdbLoadBlockStatisFromAggr(pReadh, pBlock);
+  return tsdbLoadBlockStatisFromDFile(pReadh, pBlock);
 }
 
-// int tsdbLoadBlockHead(SReadH *pReadh, SBlock *pBlock) {
-//   ASSERT(pBlock->numOfSubBlocks <= 1);
-
-//   if (pBlock->blkVer >= TSDB_SBLK_VER_1) {
-//     return tsdbLoadBlockStatisFromDFile(pReadh, pBlock);
-//   }
-//   return 0;
-// }
+int tsdbLoadBlockOffset(SReadH *pReadh, SBlock *pBlock) {
+  ASSERT(pBlock->numOfSubBlocks <= 1);
+  
+  if (pBlock->blkVer > TSDB_SBLK_VER_0) {
+    return tsdbLoadBlockStatisFromDFile(pReadh, pBlock);
+  }
+  
+  return 0;
+}
 
 int tsdbEncodeSBlockIdx(void **buf, SBlockIdx *pIdx) {
   int tlen = 0;
@@ -758,7 +759,7 @@ static int tsdbLoadBlockDataColsImpl(SReadH *pReadh, SBlock *pBlock, SDataCols *
   tdResetDataCols(pDataCols);
 
   // If only load timestamp column, no need to load SBlockData part
-  if (numOfColIds > 1 && tsdbLoadBlockStatis(pReadh, pBlock) < 0) return -1;
+  if (numOfColIds > 1 && tsdbLoadBlockOffset(pReadh, pBlock) < 0) return -1;
 
   pDataCols->numOfRows = pBlock->numOfRows;
 
@@ -800,7 +801,18 @@ static int tsdbLoadBlockDataColsImpl(SReadH *pReadh, SBlock *pBlock, SDataCols *
           break;
         }
 
-        pBlockCol = &(pReadh->pBlkData->cols[ccol]);
+        if (pBlock->blkVer == SBlockVerLatest) {
+          pBlockCol = &(pReadh->pBlkData->cols[ccol]);
+        } else {
+          SBlockColV0 *pBlkCol = ((SBlockColV0 *)(pReadh->pBlkData->cols)) + ccol;
+          blockCol.colId = pBlkCol->colId;
+          blockCol.len = pBlkCol->len;
+          blockCol.type = pBlkCol->type;
+          blockCol.offset = pBlkCol->offset;
+          blockCol.offsetH = pBlkCol->offsetH;
+          pBlockCol = &blockCol;
+        }
+
         if (pBlockCol->colId > colId) {
           pBlockCol = NULL;
           break;