fix bug

src/query/src/qExecutor.c

@@ -758,7 +758,12 @@ static void doUpdateResultRowIndex(SResultRowInfo*pResultRowInfo, TSKEY lastKey,
       }
     }
 
-    pResultRowInfo->curIndex = i + 1;  // current not closed result object
+    if (i == pResultRowInfo->size - 1) {
+      pResultRowInfo->curIndex = i;  
+    } else {
+      pResultRowInfo->curIndex = i + 1;  // current not closed result object
+    }
+
     pResultRowInfo->prevSKey = pResultRowInfo->pResult[pResultRowInfo->curIndex]->win.skey;
   }
 }
@@ -7715,4 +7720,4 @@ void** qReleaseQInfo(void* pMgmt, void* pQInfo, bool freeHandle) {
 
   taosCacheRelease(pQueryMgmt->qinfoPool, pQInfo, freeHandle);
   return 0;
-}
\ No newline at end of file
+}