diff --git a/source/dnode/vnode/src/inc/tsdb.h b/source/dnode/vnode/src/inc/tsdb.h
index aee46d421e..66f8e304ea 100644
--- a/source/dnode/vnode/src/inc/tsdb.h
+++ b/source/dnode/vnode/src/inc/tsdb.h
@@ -137,6 +137,7 @@ void    tBlockDataReset(SBlockData *pBlockData);
 void    tBlockDataClear(SBlockData *pBlockData);
 int32_t tBlockDataAppendRow(SBlockData *pBlockData, TSDBROW *pRow, STSchema *pTSchema);
 // SDelIdx
+int32_t tCmprDelIdx(void const *lhs, void const *rhs);
 int32_t tPutDelIdx(uint8_t *p, void *ph);
 int32_t tGetDelIdx(uint8_t *p, void *ph);
 // SDelData
@@ -225,7 +226,7 @@ int32_t tsdbReadDelIdx(SDelFReader *pReader, SMapData *pDelIdxMap, uint8_t **ppB
 int32_t tsdbOpenCache(STsdb *pTsdb);
 void    tsdbCloseCache(SLRUCache *pCache);
 int32_t tsdbCacheInsertLastrow(SLRUCache *pCache, tb_uid_t uid, STSRow *row);
-int32_t tsdbCacheGetLastrow(SLRUCache *pCache, tb_uid_t uid, STSRow **ppRow);
+int32_t tsdbCacheGetLastrow(SLRUCache *pCache, tb_uid_t uid, STsdb *pTsdb, STSRow **ppRow);
 int32_t tsdbCacheDeleteLastrow(SLRUCache *pCache, tb_uid_t uid);
 
 // structs =======================
diff --git a/source/dnode/vnode/src/tsdb/tsdbCache.c b/source/dnode/vnode/src/tsdb/tsdbCache.c
index 05df2672e6..02d659cc16 100644
--- a/source/dnode/vnode/src/tsdb/tsdbCache.c
+++ b/source/dnode/vnode/src/tsdb/tsdbCache.c
@@ -81,7 +81,247 @@ int32_t tsdbCacheInsertLastrow(SLRUCache *pCache, tb_uid_t uid, STSRow *row) {
   return code;
 }
 
-int32_t tsdbCacheGetLastrow(SLRUCache *pCache, tb_uid_t uid, STSRow **ppRow) {
+static tb_uid_t getTableSuidByUid(tb_uid_t uid, STsdb *pTsdb) {
+  tb_uid_t suid = 0;
+
+  SMetaReader mr = {0};
+  metaReaderInit(&mr, pTsdb->pVnode->pMeta, 0);
+  if (metaGetTableEntryByUid(&mr, uid) < 0) {
+    metaReaderClear(&mr); // table not esist
+    return 0;
+  }
+
+  if (mr.me.type == TSDB_CHILD_TABLE) {
+    suid = mr.me.ctbEntry.suid;
+  } else if (mr.me.type == TSDB_NORMAL_TABLE) {
+    suid = 0;
+  } else {
+    suid = 0;
+  }
+
+  metaReaderClear(&mr);
+
+  return suid;
+}
+/*
+static int32_t getMemLastRow(SMemTable *mem, tb_uid_t suid, tb_uid_t uid, STSRow **ppRow) {
+  int32_t code = 0;
+
+  if (mem) {
+    STbData *pMem = NULL;
+    STbDataIter* iter;              // mem buffer skip list iterator
+
+    tsdbGetTbDataFromMemTable(mem, suid, uid, &pMem);
+    if (pMem != NULL) {
+      tsdbTbDataIterCreate(pMem, NULL, 1, &iter);
+
+      if (iter != NULL) {
+	TSDBROW *row = tsdbTbDataIterGet(iter);
+
+	tsdbTbDataIterDestroy(iter);
+      }
+    }
+  } else {
+    *ppRow = NULL;
+  }
+
+  return code;
+}
+*/
+static int32_t getTableDelDataFromDelIdx(SDelFReader *pDelReader, SDelIdx *pDelIdx, SArray *aDelData) {
+  int32_t code = 0;
+
+  SMapData delDataMap;
+  SDelData delData;
+
+  if (pDelIdx) {
+    tMapDataReset(&delDataMap);
+
+    code = tsdbReadDelData(pDelReader, pDelIdx, &delDataMap, NULL);
+    if (code) goto _err;
+
+    for (int32_t iDelData = 0; iDelData < delDataMap.nItem; ++iDelData) {
+      code = tMapDataGetItemByIdx(&delDataMap, iDelData, &delData, tGetDelData);
+      if (code) goto _err;
+
+      taosArrayPush(aDelData, &delData);
+    }
+  }
+
+_err:
+  return code;
+}
+
+static int32_t getTableDelDataFromTbData(STbData *pTbData, SArray *aDelData) {
+  int32_t code = 0;
+  SDelData *pDelData = pTbData ? pTbData->pHead : NULL;
+
+  for (; pDelData; pDelData = pDelData->pNext) {
+    taosArrayPush(aDelData, pDelData);
+  }
+
+  return code;
+}
+
+static int32_t getTableDelData(STbData *pMem, STbData *pIMem, SDelFReader *pDelReader, SDelIdx *pDelIdx, SArray *aDelData) {
+  int32_t code = 0;
+
+  if (pMem) {
+    code = getTableDelDataFromTbData(pMem, aDelData);
+    if (code) goto _err;
+  }
+
+  if (pIMem) {
+    code = getTableDelDataFromTbData(pIMem, aDelData);
+    if (code) goto _err;
+  }
+
+  if (pDelIdx) {
+    code = getTableDelDataFromDelIdx(pDelReader, pDelIdx, aDelData);
+    if (code) goto _err;
+  }
+
+_err:
+  return code;
+}
+
+static int32_t getTableDelSkyline(STbData *pMem, STbData *pIMem, SDelFReader *pDelReader, SDelIdx *pDelIdx, SArray *aSkyline) {
+  int32_t code = 0;
+
+  SArray *aDelData = taosArrayInit(32, sizeof(SDelData));
+  code = getTableDelData(pMem, pIMem, pDelReader, pDelIdx, aDelData);
+  if (code) goto _err;
+
+  size_t nDelData = taosArrayGetSize(aDelData);
+  code = tsdbBuildDeleteSkyline(aDelData, 0, (int32_t)(nDelData - 1), aSkyline);
+  if (code) goto _err;
+
+  taosArrayDestroy(aDelData);
+
+_err:
+  return code;
+}
+
+static int32_t getTableDelIdx(SDelFReader *pDelFReader, tb_uid_t suid, tb_uid_t uid, SDelIdx *pDelIdx) {
+  int32_t code = 0;
+
+  SMapData delIdxMap;
+  SDelIdx  idx = {.suid = suid, .uid = uid};
+
+  tMapDataReset(&delIdxMap);
+  code = tsdbReadDelIdx(pDelFReader, &delIdxMap, NULL);
+  if (code) goto _err;
+
+  code = tMapDataSearch(&delIdxMap, &idx, tGetDelIdx, tCmprDelIdx, pDelIdx);
+  if (code) goto _err;
+
+_err:
+  return code;
+}
+
+static int32_t mergeLastRowFileSet(STbDataIter *iter, STbDataIter *iiter, SDFileSet *pFileSet,
+				   SArray *pSkyline,
+				   STsdb *pTsdb,
+				   STSRow **pLastRow) {
+  int32_t code = 0;
+
+  TSDBROW *pMemRow = NULL;
+  TSDBROW *pIMemRow = NULL;
+
+  if (iter != NULL) {
+    pMemRow = tsdbTbDataIterGet(iter);
+  }
+
+  if (iter != NULL) {
+    pIMemRow = tsdbTbDataIterGet(iiter);
+  }
+
+  SDataFReader *pDataFReader;
+  code = tsdbDataFReaderOpen(&pDataFReader, pTsdb, pFileSet);
+  if (code) goto _err;
+
+  SMapData blockIdxMap;
+  tMapDataReset(&blockIdxMap);
+  code = tsdbReadBlockIdx(pDataFReader, &blockIdxMap, NULL);
+  if (code) goto _err;
+
+  SBlockData *pBlockData;
+
+  tsdbDataFReaderClose(pDataFReader);
+
+_err:
+  return code;
+}
+
+static int32_t mergeLastRow(tb_uid_t uid, STsdb *pTsdb, STSRow **ppRow) {
+  int32_t code = 0;
+
+  tb_uid_t suid = getTableSuidByUid(uid, pTsdb);
+
+  STbData *pMem = NULL;
+  STbData *pIMem = NULL;
+  STbDataIter iter;              // mem buffer skip list iterator
+  STbDataIter iiter;             // imem buffer skip list iterator
+
+  if (pTsdb->mem) {
+    tsdbGetTbDataFromMemTable(pTsdb->mem, suid, uid, &pMem);
+    if (pMem != NULL) {
+      tsdbTbDataIterOpen(pMem, NULL, 1, &iter);
+    }
+  }
+
+  if (pTsdb->imem) {
+    tsdbGetTbDataFromMemTable(pTsdb->imem, suid, uid, &pIMem);
+    if (pIMem != NULL) {
+      tsdbTbDataIterOpen(pIMem, NULL, 1, &iiter);
+    }
+  }
+
+  *ppRow = NULL;
+
+  SDelFReader *pDelFReader;
+  //code = tsdbDelFReaderOpen(&pDelFReader, pTsdb->fs->cState->pDelFile, pTsdb, NULL);
+  if (code) goto _err;
+
+  SDelIdx delIdx;
+  code = getTableDelIdx(pDelFReader, suid, uid, &delIdx);
+  if (code) goto _err;
+
+  SArray *pSkyline = taosArrayInit(32, sizeof(TSDBKEY));
+  code = getTableDelSkyline(pMem, pIMem, pDelFReader, &delIdx, pSkyline);
+  if (code) goto _err;
+  /*
+  SFSIter fsiter;
+  bool fsHasNext = false;
+
+  tsdbFSIterOpen(pTsdb->fs, TSDB_FS_ITER_BACKWARD, &fsiter);
+  do {
+  */
+    SDFileSet *pFileSet = NULL;
+    //pFileSet = tsdbFSIterGet(fsiter);
+    
+    code = mergeLastRowFileSet(&iter, &iiter, pFileSet, pSkyline, pTsdb, ppRow);
+    if (code < 0) {
+      goto _err;
+    }
+
+    if (*ppRow != NULL) {
+      //break;
+    }
+  /*    
+  } while (fsHasNext = tsdbFSIterNext(fsiter))
+  */
+
+  tsdbDelFReaderClose(pDelFReader);
+
+  return code;
+
+_err:
+  tsdbError("vgId:%d merge last_row failed since %s", TD_VID(pTsdb->pVnode), tstrerror(code));
+  return code;
+}
+
+int32_t tsdbCacheGetLastrow(SLRUCache *pCache, tb_uid_t uid, STsdb *pTsdb, STSRow **ppRow) {
   int32_t code = 0;
   char key[32] = {0};
   int keyLen = 0;
@@ -91,9 +331,12 @@ int32_t tsdbCacheGetLastrow(SLRUCache *pCache, tb_uid_t uid, STSRow **ppRow) {
   if (h) {
     *ppRow = (STSRow *) taosLRUCacheValue(pCache, h);
   } else {
-    // TODO: load lastrow from mem, imem, and files
-    // if table's empty, return code of -1
-    code = -1;
+    STSRow *pRow = NULL;
+    code = mergeLastRow(uid, pTsdb, &pRow);
+    // if table's empty or error, return code of -1
+    if (code < 0 || pRow == NULL) {
+      return -1;
+    }
   }
 
   return code;
diff --git a/source/dnode/vnode/src/tsdb/tsdbCacheRead.c b/source/dnode/vnode/src/tsdb/tsdbCacheRead.c
index 74ecf806fd..42d6969518 100644
--- a/source/dnode/vnode/src/tsdb/tsdbCacheRead.c
+++ b/source/dnode/vnode/src/tsdb/tsdbCacheRead.c
@@ -52,7 +52,7 @@ int32_t tsdbRetrieveLastRow(void* pVnode, const SArray* pTableIdList, int32_t ty
     for (int32_t i = 0; i < numOfTables; ++i) {
       tb_uid_t* uid = taosArrayGet(pTableIdList, i);
 
-      int32_t code = tsdbCacheGetLastrow(pv->pTsdb->lruCache, *uid, &pRow);
+      int32_t code = tsdbCacheGetLastrow(pv->pTsdb->lruCache, *uid, pv->pTsdb, &pRow);
       if (code != TSDB_CODE_SUCCESS) {
         return code;
       }
@@ -77,7 +77,7 @@ int32_t tsdbRetrieveLastRow(void* pVnode, const SArray* pTableIdList, int32_t ty
     for (int32_t i = 0; i < numOfTables; ++i) {
       tb_uid_t* uid = taosArrayGet(pTableIdList, i);
 
-      int32_t code = tsdbCacheGetLastrow(pv->pTsdb->lruCache, *uid, &pRow);
+      int32_t code = tsdbCacheGetLastrow(pv->pTsdb->lruCache, *uid, pv->pTsdb, &pRow);
       if (code != TSDB_CODE_SUCCESS) {
         return code;
       }
diff --git a/source/dnode/vnode/src/tsdb/tsdbUtil.c b/source/dnode/vnode/src/tsdb/tsdbUtil.c
index be03ff89ca..158aab3f12 100644
--- a/source/dnode/vnode/src/tsdb/tsdbUtil.c
+++ b/source/dnode/vnode/src/tsdb/tsdbUtil.c
@@ -440,6 +440,25 @@ int32_t tGetBlockCol(uint8_t *p, void *ph) {
 }
 
 // SDelIdx ======================================================
+int32_t tCmprDelIdx(void const *lhs, void const *rhs) {
+  SDelIdx *lDelIdx = *(SDelIdx **)lhs;
+  SDelIdx *rDelIdx = *(SDelIdx **)rhs;
+
+  if (lDelIdx->suid < lDelIdx->suid) {
+    return -1;
+  } else if (lDelIdx->suid > lDelIdx->suid) {
+    return 1;
+  }
+
+  if (lDelIdx->uid < lDelIdx->uid) {
+    return -1;
+  } else if (lDelIdx->uid > lDelIdx->uid) {
+    return 1;
+  }
+
+  return 0;
+}
+
 int32_t tPutDelIdx(uint8_t *p, void *ph) {
   SDelIdx *pDelIdx = (SDelIdx *)ph;
   int32_t  n = 0;
@@ -1125,4 +1144,4 @@ int32_t tBlockDataAppendRow(SBlockData *pBlockData, TSDBROW *pRow, STSchema *pTS
 
 _err:
   return code;
-}
\ No newline at end of file
+}