diff --git a/src/tsdb/inc/tsdbMain.h b/src/tsdb/inc/tsdbMain.h
index 590b56e0f6337ba4388471a0b0c8f5b1059a5eee..cb3f7eb22ce29810f2c3440ee0d13245e2593280 100644
--- a/src/tsdb/inc/tsdbMain.h
+++ b/src/tsdb/inc/tsdbMain.h
@@ -272,47 +272,47 @@ typedef struct {
   SBlockCol cols[];
 } SBlockData;
 
-typedef enum { TSDB_WRITE_HELPER, TSDB_READ_HELPER } tsdb_rw_helper_t;
-
-typedef struct {
-  TSKEY      minKey;
-  TSKEY      maxKey;
-  SFileGroup fGroup;
-  SFile      nHeadF;
-  SFile      nLastF;
-} SHelperFile;
-
-typedef struct {
-  uint64_t uid;
-  int32_t  tid;
-} SHelperTable;
-
-typedef struct {
-  SBlockIdx* pIdxArray;
-  int       numOfIdx;
-  int       curIdx;
-} SIdxH;
-
-typedef struct {
-  tsdb_rw_helper_t type;
-
-  STsdbRepo* pRepo;
-  int8_t     state;
-  // For file set usage
-  SHelperFile files;
-  SIdxH       idxH;
-  SBlockIdx    curCompIdx;
-  void*       pWIdx;
-  // For table set usage
-  SHelperTable tableInfo;
-  SBlockInfo*   pCompInfo;
-  bool         hasOldLastBlock;
-  // For block set usage
-  SBlockData* pCompData;
-  SDataCols* pDataCols[2];
-  void*      pBuffer;     // Buffer to hold the whole data block
-  void*      compBuffer;  // Buffer for temperary compress/decompress purpose
-} SRWHelper;
+// typedef enum { TSDB_WRITE_HELPER, TSDB_READ_HELPER } tsdb_rw_helper_t;
+
+// typedef struct {
+//   TSKEY      minKey;
+//   TSKEY      maxKey;
+//   SFileGroup fGroup;
+//   SFile      nHeadF;
+//   SFile      nLastF;
+// } SHelperFile;
+
+// typedef struct {
+//   uint64_t uid;
+//   int32_t  tid;
+// } SHelperTable;
+
+// typedef struct {
+//   SBlockIdx* pIdxArray;
+//   int       numOfIdx;
+//   int       curIdx;
+// } SIdxH;
+
+// typedef struct {
+//   tsdb_rw_helper_t type;
+
+//   STsdbRepo* pRepo;
+//   int8_t     state;
+//   // For file set usage
+//   SHelperFile files;
+//   SIdxH       idxH;
+//   SBlockIdx    curCompIdx;
+//   void*       pWIdx;
+//   // For table set usage
+//   SHelperTable tableInfo;
+//   SBlockInfo*   pCompInfo;
+//   bool         hasOldLastBlock;
+//   // For block set usage
+//   SBlockData* pCompData;
+//   SDataCols* pDataCols[2];
+//   void*      pBuffer;     // Buffer to hold the whole data block
+//   void*      compBuffer;  // Buffer for temperary compress/decompress purpose
+// } SRWHelper;
 
 // ------------------ tsdbScan.c
 typedef struct {
@@ -324,6 +324,25 @@ typedef struct {
   FILE*      tLogStream;
 } STsdbScanHandle;
 
+// ------------------ tsdbReadUtil.c
+typedef struct {
+  STsdbRepo*  pRepo;
+  SFileGroup  fGroup;
+  TSKEY       minKey;
+  TSKEY       maxKey;
+  SBlockIdx*  pBlockIdx;
+  int         nBlockIdx;
+  SBlockIdx*  pCurBlockIdx;
+  STable*     pTable;
+  SBlockInfo* pBlockInfo;
+  SDataCols*  pDataCols[2];
+  void*       pBuf;
+  void*       pCBuf;
+} SReadHandle;
+
+#define TSDB_READ_FILE(pReadH, type) (&((pReadH)->fGroup.files[(type)]))
+#define TSDB_BLOCK_DATA_LEN(nCols) (sizeof(SBlockData) + sizeof(SBlockCol) * (nCols) + sizeof(TSCKSUM))
+
 // Operations
 // ------------------ tsdbMeta.c
 #define TSDB_INIT_NTABLES 1024
@@ -486,60 +505,60 @@ void        tsdbGetFileInfoImpl(char* fname, uint32_t* magic, int64_t* size);
 void        tsdbGetFidKeyRange(int daysPerFile, int8_t precision, int fileId, TSKEY *minKey, TSKEY *maxKey);
 
 // ------------------ tsdbRWHelper.c
-#define TSDB_HELPER_CLEAR_STATE 0x0        // Clear state
-#define TSDB_HELPER_FILE_SET_AND_OPEN 0x1  // File is set
-#define TSDB_HELPER_IDX_LOAD 0x2           // SCompIdx part is loaded
-#define TSDB_HELPER_TABLE_SET 0x4          // Table is set
-#define TSDB_HELPER_INFO_LOAD 0x8          // SCompInfo part is loaded
-#define TSDB_HELPER_FILE_DATA_LOAD 0x10    // SCompData part is loaded
-#define helperSetState(h, s) (((h)->state) |= (s))
-#define helperClearState(h, s) ((h)->state &= (~(s)))
-#define helperHasState(h, s) ((((h)->state) & (s)) == (s))
-#define blockAtIdx(h, idx) ((h)->pCompInfo->blocks + idx)
-#define TSDB_MAX_SUBBLOCKS 8
-#define IS_SUB_BLOCK(pBlock) ((pBlock)->numOfSubBlocks == 0)
-#define helperType(h) (h)->type
-#define helperRepo(h) (h)->pRepo
-#define helperState(h) (h)->state
-#define TSDB_NLAST_FILE_OPENED(h) ((h)->files.nLastF.fd > 0)
-#define helperFileId(h) ((h)->files.fGroup.fileId)
-#define helperHeadF(h) (&((h)->files.fGroup.files[TSDB_FILE_TYPE_HEAD]))
-#define helperDataF(h) (&((h)->files.fGroup.files[TSDB_FILE_TYPE_DATA]))
-#define helperLastF(h) (&((h)->files.fGroup.files[TSDB_FILE_TYPE_LAST]))
-#define helperNewHeadF(h) (&((h)->files.nHeadF))
-#define helperNewLastF(h) (&((h)->files.nLastF))
-
-int  tsdbInitReadHelper(SRWHelper* pHelper, STsdbRepo* pRepo);
-int  tsdbInitWriteHelper(SRWHelper* pHelper, STsdbRepo* pRepo);
-void tsdbDestroyHelper(SRWHelper* pHelper);
-void tsdbResetHelper(SRWHelper* pHelper);
-int  tsdbSetAndOpenHelperFile(SRWHelper* pHelper, SFileGroup* pGroup);
-int  tsdbCloseHelperFile(SRWHelper* pHelper, bool hasError, SFileGroup* pGroup);
-int  tsdbSetHelperTable(SRWHelper* pHelper, STable* pTable, STsdbRepo* pRepo);
-int  tsdbCommitTableData(SRWHelper* pHelper, SCommitIter* pCommitIter, SDataCols* pDataCols, TSKEY maxKey);
-int  tsdbMoveLastBlockIfNeccessary(SRWHelper* pHelper);
-int  tsdbWriteCompInfo(SRWHelper* pHelper);
-int  tsdbWriteCompIdx(SRWHelper* pHelper);
-int  tsdbLoadCompIdxImpl(SFile* pFile, uint32_t offset, uint32_t len, void* buffer);
-int  tsdbDecodeSCompIdxImpl(void* buffer, uint32_t len, SBlockIdx** ppCompIdx, int* numOfIdx);
-int  tsdbLoadCompIdx(SRWHelper* pHelper, void* target);
-int  tsdbLoadCompInfoImpl(SFile* pFile, SBlockIdx* pIdx, SBlockInfo** ppCompInfo);
-int  tsdbLoadCompInfo(SRWHelper* pHelper, void* target);
-int  tsdbLoadCompData(SRWHelper* phelper, SBlock* pcompblock, void* target);
-void tsdbGetDataStatis(SRWHelper* pHelper, SDataStatis* pStatis, int numOfCols);
-int  tsdbLoadBlockDataCols(SRWHelper* pHelper, SBlock* pCompBlock, SBlockInfo* pCompInfo, int16_t* colIds,
-                           int numOfColIds);
-int  tsdbLoadBlockData(SRWHelper* pHelper, SBlock* pCompBlock, SBlockInfo* pCompInfo);
-
-static FORCE_INLINE int compTSKEY(const void* key1, const void* key2) {
-  if (*(TSKEY*)key1 > *(TSKEY*)key2) {
-    return 1;
-  } else if (*(TSKEY*)key1 == *(TSKEY*)key2) {
-    return 0;
-  } else {
-    return -1;
-  }
-}
+// #define TSDB_HELPER_CLEAR_STATE 0x0        // Clear state
+// #define TSDB_HELPER_FILE_SET_AND_OPEN 0x1  // File is set
+// #define TSDB_HELPER_IDX_LOAD 0x2           // SCompIdx part is loaded
+// #define TSDB_HELPER_TABLE_SET 0x4          // Table is set
+// #define TSDB_HELPER_INFO_LOAD 0x8          // SCompInfo part is loaded
+// #define TSDB_HELPER_FILE_DATA_LOAD 0x10    // SCompData part is loaded
+// #define helperSetState(h, s) (((h)->state) |= (s))
+// #define helperClearState(h, s) ((h)->state &= (~(s)))
+// #define helperHasState(h, s) ((((h)->state) & (s)) == (s))
+// #define blockAtIdx(h, idx) ((h)->pCompInfo->blocks + idx)
+// #define TSDB_MAX_SUBBLOCKS 8
+// #define IS_SUB_BLOCK(pBlock) ((pBlock)->numOfSubBlocks == 0)
+// #define helperType(h) (h)->type
+// #define helperRepo(h) (h)->pRepo
+// #define helperState(h) (h)->state
+// #define TSDB_NLAST_FILE_OPENED(h) ((h)->files.nLastF.fd > 0)
+// #define helperFileId(h) ((h)->files.fGroup.fileId)
+// #define helperHeadF(h) (&((h)->files.fGroup.files[TSDB_FILE_TYPE_HEAD]))
+// #define helperDataF(h) (&((h)->files.fGroup.files[TSDB_FILE_TYPE_DATA]))
+// #define helperLastF(h) (&((h)->files.fGroup.files[TSDB_FILE_TYPE_LAST]))
+// #define helperNewHeadF(h) (&((h)->files.nHeadF))
+// #define helperNewLastF(h) (&((h)->files.nLastF))
+
+// int  tsdbInitReadHelper(SRWHelper* pHelper, STsdbRepo* pRepo);
+// int  tsdbInitWriteHelper(SRWHelper* pHelper, STsdbRepo* pRepo);
+// void tsdbDestroyHelper(SRWHelper* pHelper);
+// void tsdbResetHelper(SRWHelper* pHelper);
+// int  tsdbSetAndOpenHelperFile(SRWHelper* pHelper, SFileGroup* pGroup);
+// int  tsdbCloseHelperFile(SRWHelper* pHelper, bool hasError, SFileGroup* pGroup);
+// int  tsdbSetHelperTable(SRWHelper* pHelper, STable* pTable, STsdbRepo* pRepo);
+// int  tsdbCommitTableData(SRWHelper* pHelper, SCommitIter* pCommitIter, SDataCols* pDataCols, TSKEY maxKey);
+// int  tsdbMoveLastBlockIfNeccessary(SRWHelper* pHelper);
+// int  tsdbWriteCompInfo(SRWHelper* pHelper);
+// int  tsdbWriteCompIdx(SRWHelper* pHelper);
+// int  tsdbLoadCompIdxImpl(SFile* pFile, uint32_t offset, uint32_t len, void* buffer);
+// int  tsdbDecodeSCompIdxImpl(void* buffer, uint32_t len, SBlockIdx** ppCompIdx, int* numOfIdx);
+// int  tsdbLoadCompIdx(SRWHelper* pHelper, void* target);
+// int  tsdbLoadCompInfoImpl(SFile* pFile, SBlockIdx* pIdx, SBlockInfo** ppCompInfo);
+// int  tsdbLoadCompInfo(SRWHelper* pHelper, void* target);
+// int  tsdbLoadCompData(SRWHelper* phelper, SBlock* pcompblock, void* target);
+// void tsdbGetDataStatis(SRWHelper* pHelper, SDataStatis* pStatis, int numOfCols);
+// int  tsdbLoadBlockDataCols(SRWHelper* pHelper, SBlock* pCompBlock, SBlockInfo* pCompInfo, int16_t* colIds,
+//                            int numOfColIds);
+// int  tsdbLoadBlockData(SRWHelper* pHelper, SBlock* pCompBlock, SBlockInfo* pCompInfo);
+
+// static FORCE_INLINE int compTSKEY(const void* key1, const void* key2) {
+//   if (*(TSKEY*)key1 > *(TSKEY*)key2) {
+//     return 1;
+//   } else if (*(TSKEY*)key1 == *(TSKEY*)key2) {
+//     return 0;
+//   } else {
+//     return -1;
+//   }
+// }
 
 // ------------------ tsdbMain.c
 #define REPO_ID(r) (r)->config.tsdbId
diff --git a/src/tsdb/src/tsdbCommit.c b/src/tsdb/src/tsdbCommit.c
index aaac9247a08b6158d81c1fe3abd9fc499dd18ea0..4e32d50096849a5de04c12a78141fb7cb2f8f5c6 100644
--- a/src/tsdb/src/tsdbCommit.c
+++ b/src/tsdb/src/tsdbCommit.c
@@ -26,7 +26,10 @@
 typedef struct {
   int          maxIters;
   SCommitIter *pIters;
-  SRWHelper    whelper;
+  SFileGroup * pFGroup;
+  SReadHandle *pReadH;
+  SBlockIdx *  pBlockIdx;
+  SBlockInfo * pBlockInfo;
   SDataCols *  pDataCols;
 } STSCommitHandle;
 
diff --git a/src/tsdb/src/tsdbReadUtil.c b/src/tsdb/src/tsdbReadUtil.c
index acf25d1fc2c9e2653f55ec0996ae666318ec8465..2c6529ab4c7b4d10ac434625a4e9e9d16a45f024 100644
--- a/src/tsdb/src/tsdbReadUtil.c
+++ b/src/tsdb/src/tsdbReadUtil.c
@@ -21,24 +21,6 @@
 #include "tscompression.h"
 #include "tsdbMain.h"
 
-typedef struct {
-  STsdbRepo * pRepo;
-  SFileGroup  fGroup;
-  TSKEY       minKey;
-  TSKEY       maxKey;
-  SBlockIdx * pBlockIdx;
-  int         nBlockIdx;
-  SBlockIdx * pCurBlockIdx;
-  STable *    pTable;
-  SBlockInfo *pBlockInfo;
-  SDataCols * pDataCols[2];
-  void *      pBuf;
-  void *      pCBuf;
-} SReadHandle;
-
-#define TSDB_READ_FILE(pReadH, type) (&((pReadH)->fGroup.files[(type)]))
-#define TSDB_BLOCK_DATA_LEN(nCols) (sizeof(SBlockData) + sizeof(SBlockCol) * (nCols) + sizeof(TSCKSUM))
-
 int tsdbInitReadHandle(SReadHandle *pReadH, STsdbRepo *pRepo) {
   pReadH->pRepo = pRepo;
   return 0;