diff --git a/src/tsdb/src/tsdbMemTable.c b/src/tsdb/src/tsdbMemTable.c
index b1de90bc291cc909b51154b3f54e0d59a0278005..7a360c25f9ed75e6858531473c67875f3bc7ec6f 100644
--- a/src/tsdb/src/tsdbMemTable.c
+++ b/src/tsdb/src/tsdbMemTable.c
@@ -99,6 +99,7 @@ int tsdbInsertRowToMem(STsdbRepo *pRepo, SDataRow row, STable *pTable) {
   if (tSkipListPut(pTableData->pData, pNode) == NULL) {
     tsdbFreeBytes(pRepo, (void *)pNode, bytes);
   } else {
+    if (TABLE_LASTKEY(pTable) < key) TABLE_LASTKEY(pTable) = key;
     if (pMemTable->keyFirst > key) pMemTable->keyFirst = key;
     if (pMemTable->keyLast < key) pMemTable->keyLast = key;
     pMemTable->numOfRows++;