diff --git a/source/dnode/vnode/src/inc/tsdb.h b/source/dnode/vnode/src/inc/tsdb.h
index b828b1ca78..b3b8637f00 100644
--- a/source/dnode/vnode/src/inc/tsdb.h
+++ b/source/dnode/vnode/src/inc/tsdb.h
@@ -58,7 +58,7 @@ void    tsdbTbDataIterOpen(STbData *pTbData, TSDBKEY *pFrom, int8_t backward, ST
 bool    tsdbTbDataIterNext(STbDataIter *pIter);
 bool    tsdbTbDataIterGet(STbDataIter *pIter, TSDBROW *pRow);
 
-int tsdbLoadDataFromCache(STsdb *pTsdb, STable *pTable, SSkipListIterator *pIter, TSKEY maxKey, int maxRowsToRead,
+int tsdbLoadDataFromCache(STsdb *pTsdb, STable *pTable, STbDataIter *pIter, TSKEY maxKey, int maxRowsToRead,
                           SDataCols *pCols, TKEY *filterKeys, int nFilterKeys, bool keepDup, SMergeInfo *pMergeInfo);
 
 // tsdbMemTable2.c ==============================================================================================
@@ -322,16 +322,24 @@ static void  *taosTZfree(void *ptr);
 static size_t taosTSizeof(void *ptr);
 static void   taosTMemset(void *ptr, int c);
 
-static FORCE_INLINE STSRow *tsdbNextIterRow(SSkipListIterator *pIter) {
+struct TSDBROW {
+  int64_t version;
+  STSRow *pTSRow;
+};
+
+static FORCE_INLINE STSRow *tsdbNextIterRow(STbDataIter *pIter) {
+  TSDBROW row;
+
   if (pIter == NULL) return NULL;
 
-  SSkipListNode *node = tSkipListIterGet(pIter);
-  if (node == NULL) return NULL;
+  if (tsdbTbDataIterGet(pIter, &row)) {
+    return row.pTSRow;
+  }
 
-  return (STSRow *)SL_GET_NODE_DATA(node);
+  return NULL;
 }
 
-static FORCE_INLINE TSKEY tsdbNextIterKey(SSkipListIterator *pIter) {
+static FORCE_INLINE TSKEY tsdbNextIterKey(STbDataIter *pIter) {
   STSRow *row = tsdbNextIterRow(pIter);
   if (row == NULL) return TSDB_DATA_TIMESTAMP_NULL;
 
@@ -675,11 +683,6 @@ struct SFSIter {
 #define TSDB_FS_ITER_FORWARD  TSDB_ORDER_ASC
 #define TSDB_FS_ITER_BACKWARD TSDB_ORDER_DESC
 
-struct TSDBROW {
-  int64_t version;
-  STSRow *pTSRow;
-};
-
 struct TABLEID {
   tb_uid_t suid;
   tb_uid_t uid;
diff --git a/source/dnode/vnode/src/tsdb/tsdbCommit.c b/source/dnode/vnode/src/tsdb/tsdbCommit.c
index b1f6b6143e..2d298d2006 100644
--- a/source/dnode/vnode/src/tsdb/tsdbCommit.c
+++ b/source/dnode/vnode/src/tsdb/tsdbCommit.c
@@ -18,8 +18,8 @@
 #define TSDB_MAX_SUBBLOCKS 8
 
 typedef struct {
-  STable            *pTable;
-  SSkipListIterator *pIter;
+  STable      *pTable;
+  STbDataIter *pIter;
 } SCommitIter;
 
 typedef struct {
@@ -457,7 +457,9 @@ static int32_t tsdbCreateCommitIters(SCommitH *pCommith) {
   int32_t      code = 0;
   STsdb       *pRepo = TSDB_COMMIT_REPO(pCommith);
   SMemTable   *pMem = pRepo->imem;
+  STbData     *pTbData;
   SCommitIter *pCommitIter;
+  STSchema    *pTSchema = NULL;
 
   pCommith->niters = taosArrayGetSize(pMem->aTbData);
   pCommith->iters = (SCommitIter *)taosMemoryCalloc(pCommith->niters, sizeof(SCommitIter));
@@ -467,46 +469,12 @@ static int32_t tsdbCreateCommitIters(SCommitH *pCommith) {
   }
 
   for (int32_t iIter = 0; iIter < pCommith->niters; iIter++) {
-    pCommitIter = (SCommitIter *)taosArrayGetP(pMem->aTbData, iIter);
-    // TODO
+    pTbData = (STbData *)taosArrayGetP(pMem->aTbData, iIter);
+    pCommitIter = &pCommith->iters[iIter];
 
-    // pCommitIter->pIter =
-  }
-
-  return code;
-
-_err:
-  return code;
-#if 0
-  SSkipListIterator *pSlIter;
-  SSkipListNode     *pNode;
-  STbData           *pTbData;
-  STSchema          *pTSchema = NULL;
-
-  pCommith->niters = SL_SIZE(pMem->pSlIdx);
-  pCommith->iters = (SCommitIter *)taosMemoryCalloc(pCommith->niters, sizeof(SCommitIter));
-  if (pCommith->iters == NULL) {
-    terrno = TSDB_CODE_TDB_OUT_OF_MEMORY;
-    return -1;
-  }
-
-  // Loop to create iters for each skiplist
-  pSlIter = tSkipListCreateIter(pMem->pSlIdx);
-  if (pSlIter == NULL) {
-    terrno = TSDB_CODE_TDB_OUT_OF_MEMORY;
-    return -1;
-  }
-  for (int i = 0; i < pCommith->niters; i++) {
-    tSkipListIterNext(pSlIter);
-    pNode = tSkipListIterGet(pSlIter);
-    pTbData = (STbData *)pNode->pData;
-
-    pCommitIter = pCommith->iters + i;
     pTSchema = metaGetTbTSchema(REPO_META(pRepo), pTbData->uid, -1);
-
     if (pTSchema) {
-      pCommitIter->pIter = tSkipListCreateIter(pTbData->pData);
-      tSkipListIterNext(pCommitIter->pIter);
+      tsdbTbDataIterCreate(pTbData, NULL, 0, &pCommitIter->pIter);
 
       pCommitIter->pTable = (STable *)taosMemoryMalloc(sizeof(STable));
       pCommitIter->pTable->uid = pTbData->uid;
@@ -515,15 +483,18 @@ _err:
       pCommitIter->pTable->pCacheSchema = NULL;
     }
   }
-  tSkipListDestroyIter(pSlIter);
-#endif
+
+  return code;
+
+_err:
+  return code;
 }
 
 static void tsdbDestroyCommitIters(SCommitH *pCommith) {
   if (pCommith->iters == NULL) return;
 
   for (int i = 1; i < pCommith->niters; i++) {
-    tSkipListDestroyIter(pCommith->iters[i].pIter);
+    tsdbTbDataIterDestroy(pCommith->iters[i].pIter);
     if (pCommith->iters[i].pTable) {
       tdFreeSchema(pCommith->iters[i].pTable->pSchema);
       tdFreeSchema(pCommith->iters[i].pTable->pCacheSchema);
@@ -1333,7 +1304,7 @@ static int tsdbMergeMemData(SCommitH *pCommith, SCommitIter *pIter, int bidx) {
     keyLimit = pBlock[1].minKey.ts - 1;
   }
 
-  SSkipListIterator titer = *(pIter->pIter);
+  STbDataIter titer = *(pIter->pIter);
   if (tsdbLoadBlockDataCols(&(pCommith->readh), pBlock, NULL, &colId, 1, false) < 0) return -1;
 
   tsdbLoadDataFromCache(TSDB_COMMIT_REPO(pCommith), pIter->pTable, &titer, keyLimit, INT32_MAX, NULL,
@@ -1542,7 +1513,7 @@ static void tsdbLoadAndMergeFromCache(STsdb *pTsdb, SDataCols *pDataCols, int *i
         lastKey = key2;
       }
 
-      tSkipListIterNext(pCommitIter->pIter);
+      tsdbTbDataIterNext(pCommitIter->pIter);
     } else {
       if (lastKey != key1) {
         if (lastKey != TSKEY_INITIAL_VAL) {
@@ -1574,7 +1545,7 @@ static void tsdbLoadAndMergeFromCache(STsdb *pTsdb, SDataCols *pDataCols, int *i
         tdAppendSTSRowToDataCol(row, pSchema, pTarget, true);
       }
       ++(*iter);
-      tSkipListIterNext(pCommitIter->pIter);
+      tsdbTbDataIterNext(pCommitIter->pIter);
     }
 
     if (pTarget->numOfRows >= (maxRows - 1)) break;
diff --git a/source/dnode/vnode/src/tsdb/tsdbMemTable.c b/source/dnode/vnode/src/tsdb/tsdbMemTable.c
index 46ad963c2c..41caf2598f 100644
--- a/source/dnode/vnode/src/tsdb/tsdbMemTable.c
+++ b/source/dnode/vnode/src/tsdb/tsdbMemTable.c
@@ -321,7 +321,7 @@ bool tsdbTbDataIterGet(STbDataIter *pIter, TSDBROW *pRow) {
  *
  * The function tries to procceed AS MUCH AS POSSIBLE.
  */
-int tsdbLoadDataFromCache(STsdb *pTsdb, STable *pTable, SSkipListIterator *pIter, TSKEY maxKey, int maxRowsToRead,
+int tsdbLoadDataFromCache(STsdb *pTsdb, STable *pTable, STbDataIter *pIter, TSKEY maxKey, int maxRowsToRead,
                           SDataCols *pCols, TKEY *filterKeys, int nFilterKeys, bool keepDup, SMergeInfo *pMergeInfo) {
   ASSERT(maxRowsToRead > 0 && nFilterKeys >= 0);
   if (pIter == NULL) return 0;
@@ -404,7 +404,7 @@ int tsdbLoadDataFromCache(STsdb *pTsdb, STable *pTable, SSkipListIterator *pIter
         }
       }
 
-      tSkipListIterNext(pIter);
+      tsdbTbDataIterNext(pIter);
       row = tsdbNextIterRow(pIter);
       if (row == NULL || TD_ROW_KEY(row) > maxKey) {
         rowKey = INT64_MAX;
@@ -444,7 +444,7 @@ int tsdbLoadDataFromCache(STsdb *pTsdb, STable *pTable, SSkipListIterator *pIter
         }
       }
 
-      tSkipListIterNext(pIter);
+      tsdbTbDataIterNext(pIter);
       row = tsdbNextIterRow(pIter);
       if (row == NULL || TD_ROW_KEY(row) > maxKey) {
         rowKey = INT64_MAX;