diff --git a/source/libs/function/src/builtinsimpl.c b/source/libs/function/src/builtinsimpl.c
index 3fb298e1ea..699865a9bf 100644
--- a/source/libs/function/src/builtinsimpl.c
+++ b/source/libs/function/src/builtinsimpl.c
@@ -2366,7 +2366,10 @@ EFuncDataRequired firstDynDataReq(void* pRes, SDataBlockInfo* pBlockInfo) {
     }    
     if (pResult->ts < pBlockInfo->window.skey) {
       return FUNC_DATA_REQUIRED_NOT_LOAD;
-    } else if (pResult->ts == pBlockInfo->window.skey && pResult->pkData) {
+    } else if (pResult->ts == pBlockInfo->window.skey) {
+      if (NULL == pResult->pkData) {
+        return FUNC_DATA_REQUIRED_NOT_LOAD;
+      }
       if (comparePkDataWithSValue(pResult->pkType, pResult->pkData, pBlockInfo->pks + 0, TSDB_ORDER_ASC) < 0) {
         return FUNC_DATA_REQUIRED_NOT_LOAD;
       }