From 26cafdea135a12a71d863fbe63ef0d59eda69a3b Mon Sep 17 00:00:00 2001
From: Ganlin Zhao <ganlinzhao@hotmail.com>
Date: Wed, 31 May 2023 11:08:41 +0800
Subject: [PATCH] fix: fix multiple diffs ouput less lines if null values
 present

---
 source/libs/function/src/builtinsimpl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/source/libs/function/src/builtinsimpl.c b/source/libs/function/src/builtinsimpl.c
index cdecc8b8cc..4c14b67155 100644
--- a/source/libs/function/src/builtinsimpl.c
+++ b/source/libs/function/src/builtinsimpl.c
@@ -2663,7 +2663,7 @@ bool diffFunctionSetup(SqlFunctionCtx* pCtx, SResultRowEntryInfo* pResInfo) {
   } else {
     pDiffInfo->ignoreNegative = false;
   }
-  pDiffInfo->includeNull = false;
+  pDiffInfo->includeNull = true;
   pDiffInfo->firstOutput = false;
   return true;
 }