From 9dc8476f5d469fd0d5cb6814b86f67f87e1d90e3 Mon Sep 17 00:00:00 2001
From: Kijin Sung <kijin@kijinsung.com>
Date: Sun, 31 Jan 2021 01:43:07 +0900
Subject: [PATCH] Set $output->data to NULL if query returns no rows

---
 common/framework/db.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/common/framework/db.php b/common/framework/db.php
index f5662a6fe..4002c4fc5 100644
--- a/common/framework/db.php
+++ b/common/framework/db.php
@@ -538,9 +538,9 @@ class DB
 			throw new Exceptions\DBError($e->getMessage(), 0, $e);
 		}
 		
-		if ($result_type === 'auto' && $last_index === 0 && count($result) === 1)
+		if ($result_type === 'auto' && $last_index === 0 && count($result) <= 1)
 		{
-			return $result[0];
+			return isset($result[0]) ? $result[0] : null;
 		}
 		else
 		{