diff --git a/source/dnode/vnode/src/inc/tsdb.h b/source/dnode/vnode/src/inc/tsdb.h
index c87dab14d556f4f5af2024cea6de3da605bf04d9..d916204a1534e0d578cabc96f91fff3689aa5b36 100644
--- a/source/dnode/vnode/src/inc/tsdb.h
+++ b/source/dnode/vnode/src/inc/tsdb.h
@@ -81,7 +81,7 @@ void    tsdbRowGetColVal(TSDBROW *pRow, STSchema *pTSchema, int32_t iCol, SColVa
 int32_t tPutTSDBRow(uint8_t *p, TSDBROW *pRow);
 int32_t tGetTSDBRow(uint8_t *p, TSDBROW *pRow);
 // SRowIter
-#define tRowIterInit(ROW, SCHEMA) ((SRowIter){.pRow = (ROW), .pSchema = (SCHEMA)})
+void     tRowIterInit(SRowIter *pIter, TSDBROW *pRow, STSchema *pTSchema);
 SColVal *tRowIterNext(SRowIter *pIter);
 // TABLEID
 int32_t tTABLEIDCmprFn(const void *p1, const void *p2);
@@ -114,6 +114,7 @@ int32_t tGetBlockIdx(uint8_t *p, void *ph);
 void    tColDataReset(SColData *pColData);
 void    tColDataClear(void *ph);
 int32_t tColDataAppendValue(SColData *pColData, SColVal *pColVal);
+void    tColDataGetValue(SColData *pColData, int32_t iRow, SColVal *pColVal);
 int32_t tColDataCmprFn(const void *p1, const void *p2);
 // SBlockData
 int32_t tBlockDataInit(SBlockData *pBlockData);
@@ -449,22 +450,26 @@ struct SBlockDataHdr {
 };
 
 struct SHeadFile {
+  int64_t commitID;
   int64_t size;
   int64_t offset;
   int32_t nRef;
 };
 
 struct SDataFile {
+  int64_t commitID;
   int64_t size;
   int32_t nRef;
 };
 
 struct SLastFile {
+  int64_t commitID;
   int64_t size;
   int32_t nRef;
 };
 
 struct SSmaFile {
+  int64_t commitID;
   int64_t size;
   int32_t nRef;
 };
@@ -481,7 +486,7 @@ struct SDFileSet {
 
 struct SRowIter {
   TSDBROW  *pRow;
-  STSchema *pSchema;
+  STSchema *pTSchema;
   SColVal   colVal;
   int32_t   i;
 };
diff --git a/source/dnode/vnode/src/tsdb/tsdbUtil.c b/source/dnode/vnode/src/tsdb/tsdbUtil.c
index cbc8c9424545e232c8fbc4b37859b30e558ce1e4..b9c7ec7ab8793a3a1e3a08099f86166277d202ba 100644
--- a/source/dnode/vnode/src/tsdb/tsdbUtil.c
+++ b/source/dnode/vnode/src/tsdb/tsdbUtil.c
@@ -583,6 +583,43 @@ int32_t tGetTSDBRow(uint8_t *p, TSDBROW *pRow) {
   return n;
 }
 
+// SRowIter ======================================================
+void tRowIterInit(SRowIter *pIter, TSDBROW *pRow, STSchema *pTSchema) {
+  pIter->pRow = pRow;
+  if (pRow->type == 0) {
+    ASSERT(pTSchema);
+    pIter->pTSchema = pTSchema;
+    pIter->i = 1;
+  } else if (pRow->type == 1) {
+    pIter->pTSchema = NULL;
+    pIter->i = 0;
+  } else {
+    ASSERT(0);
+  }
+}
+
+SColVal *tRowIterNext(SRowIter *pIter) {
+  if (pIter->pRow->type == 0) {
+    if (pIter->i < pIter->pTSchema->numOfCols) {
+      tsdbRowGetColVal(pIter->pRow, pIter->pTSchema, pIter->i, &pIter->colVal);
+      pIter->i++;
+
+      return &pIter->colVal;
+    }
+  } else {
+    if (pIter->i < taosArrayGetSize(pIter->pRow->pBlockData->apColData)) {
+      SColData *pColData = (SColData *)taosArrayGetP(pIter->pRow->pBlockData->apColData, pIter->i);
+
+      tColDataGetValue(pColData, pIter->pRow->iRow, &pIter->colVal);
+      pIter->i++;
+
+      return &pIter->colVal;
+    }
+  }
+
+  return NULL;
+}
+
 // delete skyline ======================================================
 static int32_t tsdbMergeSkyline(SArray *aSkyline1, SArray *aSkyline2, SArray *aSkyline) {
   int32_t  code = 0;
@@ -731,6 +768,10 @@ int32_t tColDataAppendValue(SColData *pColData, SColVal *pColVal) {
   return code;
 }
 
+void tColDataGetValue(SColData *pColData, int32_t iRow, SColVal *pColVal) {
+  // TODO
+}
+
 int32_t tColDataCmprFn(const void *p1, const void *p2) {
   if (((SColData *)p1)->cid < ((SColData *)p2)->cid) {
     return -1;
@@ -834,14 +875,16 @@ int32_t tBlockDataAppendRow(SBlockData *pBlockData, TSDBROW *pRow, STSchema *pTS
   pBlockData->aVersion[nRow] = key.version;
   pBlockData->aTSKEY[nRow] = key.ts;
 
-// OTHER
-#if 0
-  int32_t  iColData = 0;
-  int32_t  nColData = taosArrayGetSize(pBlockData->apColData);
-  SRowIter ri = tRowIterInit(pRow, pTSchema);
+  // OTHER
+  int32_t   iColData = 0;
+  int32_t   nColData = taosArrayGetSize(pBlockData->apColData);
+  SRowIter  ri;
+  SColData *pColData;
+  SColVal  *pColVal;
 
-  SColData *pColData = iColData < nColData ? (SColData *)taosArrayGetP(pBlockData->apColData, iColData) : NULL;
-  SColVal  *pColVal = tRowIterNext(&ri);
+  tRowIterInit(&ri, pRow, pTSchema);
+  pColData = iColData < nColData ? (SColData *)taosArrayGetP(pBlockData->apColData, iColData) : NULL;
+  pColVal = tRowIterNext(&ri);
   while (true) {
     if (pColData && pColVal) {
       if (pColData->cid == pColVal->cid) {
@@ -861,7 +904,6 @@ int32_t tBlockDataAppendRow(SBlockData *pBlockData, TSDBROW *pRow, STSchema *pTS
       // add a new SColData and append value
     }
   }
-#endif
 
   return code;