diff --git a/source/dnode/vnode/src/tsdb/tsdbRead2.c b/source/dnode/vnode/src/tsdb/tsdbRead2.c
index 9f48f330cb..bed8ff61c7 100644
--- a/source/dnode/vnode/src/tsdb/tsdbRead2.c
+++ b/source/dnode/vnode/src/tsdb/tsdbRead2.c
@@ -2361,7 +2361,7 @@ int32_t mergeRowsInSttBlocks(SSttBlockReader* pSttBlockReader, STableBlockScanIn
   }
 
   if (copied) {
-//    tRowKeyAssign(&pBlockScanInfo->lastProcKey, &sttKey);
+    tRowKeyAssign(&pBlockScanInfo->lastProcKey, &sttKey);
     return TSDB_CODE_SUCCESS;
   } else {
     code = tsdbRowMergerAdd(pMerger, &fRow, NULL);