diff --git a/include/common/tdataformat.h b/include/common/tdataformat.h
index 6a73d3d67839bde8c63c0710170602e2ddfa8ad1..9ce39e7966a918dbca5190aa453408db2993fd4f 100644
--- a/include/common/tdataformat.h
+++ b/include/common/tdataformat.h
@@ -42,7 +42,9 @@ int32_t tTSchemaCreate(int32_t sver, SSchema *pSchema, int32_t nCols, STSchema *
 void    tTSchemaDestroy(STSchema *pTSchema);
 
 // SValue
-int tValueCmprFn(const SValue *pValue1, const SValue *pValue2, int8_t type);
+int32_t tPutValue(uint8_t *p, SValue *pValue, int8_t type);
+int32_t tGetValue(uint8_t *p, SValue *pValue, int8_t type);
+int     tValueCmprFn(const SValue *pValue1, const SValue *pValue2, int8_t type);
 
 // STSRow2
 #define COL_VAL_NONE(CID)     ((SColVal){.cid = (CID), .isNone = 1})
diff --git a/source/common/src/tdataformat.c b/source/common/src/tdataformat.c
index 1ddb606ccfa2f721e5de4b704a2c63ff2fd4fe6e..d2206735b450adc3da97156742d0a231579eda6f 100644
--- a/source/common/src/tdataformat.c
+++ b/source/common/src/tdataformat.c
@@ -37,7 +37,7 @@ typedef struct {
 #define GET_BIT2(p, i)     (((p)[(i) / 4] >> ((i) % 4)) & ((uint8_t)3))
 
 // SValue
-static FORCE_INLINE int32_t tPutValue(uint8_t *p, SValue *pValue, int8_t type) {
+int32_t tPutValue(uint8_t *p, SValue *pValue, int8_t type) {
   int32_t n = 0;
 
   if (IS_VAR_DATA_TYPE(type)) {
@@ -88,7 +88,7 @@ static FORCE_INLINE int32_t tPutValue(uint8_t *p, SValue *pValue, int8_t type) {
   return n;
 }
 
-static FORCE_INLINE int32_t tGetValue(uint8_t *p, SValue *pValue, int8_t type) {
+int32_t tGetValue(uint8_t *p, SValue *pValue, int8_t type) {
   int32_t n = 0;
 
   if (IS_VAR_DATA_TYPE(type)) {
@@ -421,7 +421,7 @@ int32_t tTSRowNew(STSRowBuilder *pBuilder, SArray *pArray, STSchema *pTSchema, S
     _set_none:
       if ((flags & 0xf0) == 0) {
         setBitMap(pb, 0, iColumn - 1, flags);
-        if (flags & TSROW_HAS_VAL) { // set 0
+        if (flags & TSROW_HAS_VAL) {  // set 0
           if (IS_VAR_DATA_TYPE(pTColumn->type)) {
             *(VarDataOffsetT *)(pf + pTColumn->offset) = 0;
           } else {
@@ -434,7 +434,7 @@ int32_t tTSRowNew(STSRowBuilder *pBuilder, SArray *pArray, STSchema *pTSchema, S
     _set_null:
       if ((flags & 0xf0) == 0) {
         setBitMap(pb, 1, iColumn - 1, flags);
-        if (flags & TSROW_HAS_VAL) { // set 0
+        if (flags & TSROW_HAS_VAL) {  // set 0
           if (IS_VAR_DATA_TYPE(pTColumn->type)) {
             *(VarDataOffsetT *)(pf + pTColumn->offset) = 0;
           } else {
@@ -1109,9 +1109,9 @@ _err:
 #if 1  // ===================================================================================================================
 static void dataColSetNEleNull(SDataCol *pCol, int nEle);
 int         tdAllocMemForCol(SDataCol *pCol, int maxPoints) {
-  int spaceNeeded = pCol->bytes * maxPoints;
-  if (IS_VAR_DATA_TYPE(pCol->type)) {
-    spaceNeeded += sizeof(VarDataOffsetT) * maxPoints;
+          int spaceNeeded = pCol->bytes * maxPoints;
+          if (IS_VAR_DATA_TYPE(pCol->type)) {
+            spaceNeeded += sizeof(VarDataOffsetT) * maxPoints;
   }
 #ifdef TD_SUPPORT_BITMAP
   int32_t nBitmapBytes = (int32_t)TD_BITMAP_BYTES(maxPoints);
diff --git a/source/dnode/vnode/src/inc/tsdb.h b/source/dnode/vnode/src/inc/tsdb.h
index d3e66dc3df756221e740ba828a540d000f6ec183..cb4c04eec59747868d30a052ca089454a384d9b7 100644
--- a/source/dnode/vnode/src/inc/tsdb.h
+++ b/source/dnode/vnode/src/inc/tsdb.h
@@ -31,22 +31,23 @@ extern "C" {
 #define tsdbDebug(...) do { if (tsdbDebugFlag & DEBUG_DEBUG) { taosPrintLog("TSDB ", DEBUG_DEBUG, tsdbDebugFlag, __VA_ARGS__); }} while(0)
 #define tsdbTrace(...) do { if (tsdbDebugFlag & DEBUG_TRACE) { taosPrintLog("TSDB ", DEBUG_TRACE, tsdbDebugFlag, __VA_ARGS__); }} while(0)
 // clang-format on
-typedef struct TSDBROW      TSDBROW;
-typedef struct TSDBKEY      TSDBKEY;
-typedef struct TABLEID      TABLEID;
-typedef struct SDelOp       SDelOp;
-typedef struct SDelDataItem SDelDataItem;
-typedef struct SDelData     SDelData;
-typedef struct SDelIdxItem  SDelIdxItem;
-typedef struct SDelIdx      SDelIdx;
-typedef struct STbData      STbData;
-typedef struct SMemTable    SMemTable;
-typedef struct STbDataIter  STbDataIter;
-typedef struct SMergeInfo   SMergeInfo;
-typedef struct STable       STable;
-typedef struct SOffset      SOffset;
-typedef struct SMapData     SMapData;
-typedef struct SVDataCols   SVDataCols;
+typedef struct TSDBROW       TSDBROW;
+typedef struct TSDBKEY       TSDBKEY;
+typedef struct TABLEID       TABLEID;
+typedef struct SDelOp        SDelOp;
+typedef struct SDelDataItem  SDelDataItem;
+typedef struct SDelData      SDelData;
+typedef struct SDelIdxItem   SDelIdxItem;
+typedef struct SDelIdx       SDelIdx;
+typedef struct STbData       STbData;
+typedef struct SMemTable     SMemTable;
+typedef struct STbDataIter   STbDataIter;
+typedef struct SMergeInfo    SMergeInfo;
+typedef struct STable        STable;
+typedef struct SOffset       SOffset;
+typedef struct SMapData      SMapData;
+typedef struct SColData      SColData;
+typedef struct SColDataBlock SColDataBlock;
 
 // tsdbMemTable ==============================================================================================
 
@@ -270,8 +271,16 @@ int tsdbLockRepo(STsdb *pTsdb);
 int tsdbUnlockRepo(STsdb *pTsdb);
 
 struct TSDBROW {
-  int64_t version;
-  STSRow *pTSRow;
+  union {
+    struct {
+      int64_t version;
+      STSRow *pTSRow;
+    };
+    struct {
+      SColDataBlock *pColDataBlock;
+      int32_t        iRow;
+    };
+  };
 };
 
 struct SBlockIdxItem {
@@ -449,8 +458,19 @@ struct SMapData {
   uint8_t *pData;
 };
 
-struct SVDataCols {
-  int64_t *aVersion;
+struct SColData {
+  int16_t  cid;
+  uint8_t  flags;
+  uint32_t nData;
+  uint8_t *pData;
+};
+
+struct SColDataBlock {
+  int32_t   nRow;
+  int64_t  *aVersion;
+  TSKEY    *aTSKey;
+  int32_t   nColData;
+  SColData *aColData;
 };
 
 #ifdef __cplusplus
diff --git a/source/dnode/vnode/src/tsdb/tsdbCommit.c b/source/dnode/vnode/src/tsdb/tsdbCommit.c
index 1655f222ac0c487b4bf92d600c6a92473d9f736e..8aabd6dcd876cb0e4c4be025dc53df48001f5aaf 100644
--- a/source/dnode/vnode/src/tsdb/tsdbCommit.c
+++ b/source/dnode/vnode/src/tsdb/tsdbCommit.c
@@ -40,8 +40,8 @@ struct SCommitter {
   SBlockIdx    *pBlockIdx;
   SMapData      oBlock;
   SMapData      nBlock;
-  SColDataBatch oBatch;
-  SColDataBatch nBatch;
+  SColDataBlock oColDataBlock;
+  SColDataBlock nColDataBlock;
   /* commit del */
   SDelFReader *pDelFReader;
   SDelFWriter *pDelFWriter;
diff --git a/source/dnode/vnode/src/tsdb/tsdbUtil.c b/source/dnode/vnode/src/tsdb/tsdbUtil.c
index 950b1fbd113d8beaaec3b021917c0772679bcf29..15782256f835cac1403ca116ef0ce712b7521a4d 100644
--- a/source/dnode/vnode/src/tsdb/tsdbUtil.c
+++ b/source/dnode/vnode/src/tsdb/tsdbUtil.c
@@ -726,4 +726,41 @@ int32_t tsdbKeyFid(TSKEY key, int32_t minutes, int8_t precision) {
   }
 }
 
-// SColDataBlock ======================================================
\ No newline at end of file
+// TSDBROW ======================================================
+void tsdbRowGetColVal(TSDBROW *pRow, STSchema *pTSchema, int32_t iCol, SColVal *pColVal) {
+  // TODO
+}
+
+// SColDataBlock ======================================================
+int32_t tsdbColDataBlockAppend(SColDataBlock *pColDataBlock, TSDBROW *pRow, STSchema *pTSchema) {
+  int32_t   code = 0;
+  int32_t   nRow = pColDataBlock->nRow;
+  STColumn *pTColumn;
+  SColData *pColData;
+  SColVal   colVal;
+
+  pColDataBlock->nRow++;
+
+  // version
+  pColDataBlock->aVersion[nRow] = pRow->version;  // TODO
+
+  // ts
+  pColDataBlock->aTSKey[nRow] = pRow->pTSRow->ts;  // TODO
+
+  // other rows
+  for (int32_t iCol = 1; iCol < pTSchema->numOfCols; iCol++) {
+    pTColumn = &pTSchema->columns[iCol];
+
+    tsdbRowGetColVal(pRow, pTSchema, iCol, &colVal);
+
+    if (colVal.isNone) {
+      // TODO
+    } else if (colVal.isNull) {
+      // TODO
+    } else {
+      pColData->nData += tPutValue(pColData->pData + pColData->nData, &colVal.value, pTColumn->type);
+    }
+  }
+
+  return code;
+}
\ No newline at end of file