From 320525edf988c75b816da3c43de6370c8fec5c94 Mon Sep 17 00:00:00 2001
From: Ganlin Zhao <ganlinzhao@hotmail.com>
Date: Tue, 26 Jul 2022 20:07:28 +0800
Subject: [PATCH] fix(query): fix max/min with null input

---
 source/libs/function/src/builtinsimpl.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/source/libs/function/src/builtinsimpl.c b/source/libs/function/src/builtinsimpl.c
index 790f5d03a3..bc24f54b52 100644
--- a/source/libs/function/src/builtinsimpl.c
+++ b/source/libs/function/src/builtinsimpl.c
@@ -1577,6 +1577,11 @@ int32_t doMinMaxHelper(SqlFunctionCtx* pCtx, int32_t isMinFunc) {
     }
   }
 
+  if (numOfElems == 0) {
+    GET_RES_INFO(pCtx)->isNullRes = 1;
+    numOfElems = 1;
+  }
+
 _min_max_over:
   return numOfElems;
 }
-- 
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