diff --git a/src/query/src/qExecutor.c b/src/query/src/qExecutor.c
index 8f3c51d2a9688690d3b4331a762ce917e9d487cb..e0e18a7cc851fc8fdec8a23e47b808a9f1b2f6ed 100644
--- a/src/query/src/qExecutor.c
+++ b/src/query/src/qExecutor.c
@@ -4170,8 +4170,10 @@ static SSDataBlock* doTableScan(void* param) {
       assert(ret);
     }
 
-    pResultRowInfo->curIndex = 0;
-    pResultRowInfo->prevSKey = pResultRowInfo->pResult[0]->win.skey;
+    if (pResultRowInfo->size > 0) {
+      pResultRowInfo->curIndex = 0;
+      pResultRowInfo->prevSKey = pResultRowInfo->pResult[0]->win.skey;
+    }
 
     qDebug("QInfo:%p start to repeat scan data blocks due to query func required, qrange:%" PRId64 "-%" PRId64,
            pRuntimeEnv->qinfo, cond.twindow.skey, cond.twindow.ekey);