From d4a38245a20d6296716200b253a7b8ec5a51abf3 Mon Sep 17 00:00:00 2001
From: Ganlin Zhao <ganlinzhao@hotmail.com>
Date: Mon, 13 Jun 2022 21:21:46 +0800
Subject: [PATCH] add some check

---
 source/libs/function/src/builtinsimpl.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/source/libs/function/src/builtinsimpl.c b/source/libs/function/src/builtinsimpl.c
index 280f0217b9..032333228a 100644
--- a/source/libs/function/src/builtinsimpl.c
+++ b/source/libs/function/src/builtinsimpl.c
@@ -2432,6 +2432,9 @@ int32_t lastFunction(SqlFunctionCtx* pCtx) {
 }
 
 static void firstLastTransferInfo(SFirstLastRes* pInput, SFirstLastRes* pOutput) {
+  if (!pInput->hasResult) {
+    return;
+  }
   pOutput->bytes = pInput->bytes;
   TSKEY *tsIn = (TSKEY*)(pInput->buf + pInput->bytes);
   TSKEY *tsOut = (TSKEY*)(pOutput->buf + pInput->bytes);