diff --git a/source/dnode/vnode/src/inc/tsdb.h b/source/dnode/vnode/src/inc/tsdb.h
index fc1c039f8b..85a88f65c0 100644
--- a/source/dnode/vnode/src/inc/tsdb.h
+++ b/source/dnode/vnode/src/inc/tsdb.h
@@ -252,7 +252,7 @@ int32_t tsdbReadDelIdx(SDelFReader *pReader, SArray *aDelIdx, uint8_t **ppBuf);
 int32_t tsdbOpenCache(STsdb *pTsdb);
 void    tsdbCloseCache(SLRUCache *pCache);
 int32_t tsdbCacheInsertLast(SLRUCache *pCache, tb_uid_t uid, STSRow *row);
-int32_t tsdbCacheInsertLastrow(SLRUCache *pCache, tb_uid_t uid, STSRow *row, bool dup);
+int32_t tsdbCacheInsertLastrow(SLRUCache *pCache, STsdb *pTsdb, tb_uid_t uid, STSRow *row, bool dup);
 
 int32_t tsdbCacheGetLastH(SLRUCache *pCache, tb_uid_t uid, STsdb *pTsdb, LRUHandle **h);
 int32_t tsdbCacheGetLastrowH(SLRUCache *pCache, tb_uid_t uid, STsdb *pTsdb, LRUHandle **h);
diff --git a/source/dnode/vnode/src/tsdb/tsdbCache.c b/source/dnode/vnode/src/tsdb/tsdbCache.c
index 11c401e04a..28b121fce8 100644
--- a/source/dnode/vnode/src/tsdb/tsdbCache.c
+++ b/source/dnode/vnode/src/tsdb/tsdbCache.c
@@ -89,7 +89,7 @@ static int32_t tsdbCacheDeleteLast(SLRUCache *pCache, tb_uid_t uid, TSKEY eKey)
   return code;
 }
 
-int32_t tsdbCacheInsertLastrow(SLRUCache *pCache, tb_uid_t uid, STSRow *row, bool dup) {
+int32_t tsdbCacheInsertLastrow(SLRUCache *pCache, STsdb *pTsdb, tb_uid_t uid, STSRow *row, bool dup) {
   int32_t code = 0;
   STSRow *cacheRow = NULL;
   char    key[32] = {0};
@@ -100,6 +100,24 @@ int32_t tsdbCacheInsertLastrow(SLRUCache *pCache, tb_uid_t uid, STSRow *row, boo
   if (h) {
     cacheRow = (STSRow *)taosLRUCacheValue(pCache, h);
     if (row->ts >= cacheRow->ts) {
+      if (row->ts == cacheRow->ts) {
+        STSRow    *mergedRow;
+        SRowMerger merger = {0};
+        STSchema  *pTSchema = metaGetTbTSchema(pTsdb->pVnode->pMeta, uid, -1);
+
+        tRowMergerInit(&merger, &tsdbRowFromTSRow(0, cacheRow), pTSchema);
+
+        tRowMerge(&merger, &tsdbRowFromTSRow(1, row));
+
+        tRowMergerGetRow(&merger, &mergedRow);
+        tRowMergerClear(&merger);
+
+        taosMemoryFreeClear(pTSchema);
+
+        row = mergedRow;
+        dup = false;
+      }
+
       if (TD_ROW_LEN(row) <= TD_ROW_LEN(cacheRow)) {
         tdRowCpy(cacheRow, row);
         if (!dup) {
@@ -110,7 +128,14 @@ int32_t tsdbCacheInsertLastrow(SLRUCache *pCache, tb_uid_t uid, STSRow *row, boo
       } else {
         taosLRUCacheRelease(pCache, h, true);
         // tsdbCacheDeleteLastrow(pCache, uid, TSKEY_MAX);
-        tsdbCacheInsertLastrow(pCache, uid, row, dup);
+
+        _taos_lru_deleter_t deleter = deleteTableCacheLastrow;
+        LRUStatus status = taosLRUCacheInsert(pCache, key, keyLen, cacheRow, TD_ROW_LEN(cacheRow), deleter, NULL,
+                                              TAOS_LRU_PRIORITY_LOW);
+        if (status != TAOS_LRU_STATUS_OK) {
+          code = -1;
+        }
+        /* tsdbCacheInsertLastrow(pCache, uid, row, dup); */
       }
     }
   } else {
@@ -966,7 +991,7 @@ int32_t tsdbCacheGetLastrowH(SLRUCache *pCache, tb_uid_t uid, STsdb *pTsdb, LRUH
       return 0;
     }
 
-    tsdbCacheInsertLastrow(pCache, uid, pRow, dup);
+    tsdbCacheInsertLastrow(pCache, pTsdb, uid, pRow, dup);
     h = taosLRUCacheLookup(pCache, key, keyLen);
     //*ppRow = (STSRow *)taosLRUCacheValue(pCache, h);
   }
diff --git a/source/dnode/vnode/src/tsdb/tsdbMemTable.c b/source/dnode/vnode/src/tsdb/tsdbMemTable.c
index f8e9e4ee34..784ea77fb8 100644
--- a/source/dnode/vnode/src/tsdb/tsdbMemTable.c
+++ b/source/dnode/vnode/src/tsdb/tsdbMemTable.c
@@ -548,13 +548,16 @@ static int32_t tsdbInsertTableDataImpl(SMemTable *pMemTable, STbData *pTbData, i
     } while (row.pTSRow);
   }
 
-  if (key.ts > pTbData->maxKey) {
-    pTbData->maxKey = key.ts;
+  if (key.ts >= pTbData->maxKey) {
+    if (key.ts > pTbData->maxKey) {
+      pTbData->maxKey = key.ts;
+    }
 
-    if (pLastRow) {
-      tsdbCacheInsertLastrow(pMemTable->pTsdb->lruCache, pTbData->uid, pLastRow, true);
+    if (pLastRow != NULL) {
+      tsdbCacheInsertLastrow(pMemTable->pTsdb->lruCache, pMemTable->pTsdb, pTbData->uid, pLastRow, true);
     }
   }
+
   pTbData->minVersion = TMIN(pTbData->minVersion, version);
   pTbData->maxVersion = TMAX(pTbData->maxVersion, version);