From 5a0664c826b7bef1d11ee54acb96f92689cc5022 Mon Sep 17 00:00:00 2001
From: thinkphp <thinkphp@qq.com>
Date: Sun, 3 Apr 2016 20:03:44 +0800
Subject: [PATCH] =?UTF-8?q?=E8=BF=98=E5=8E=9Fmysql=E9=A9=B1=E5=8A=A8?=
 =?UTF-8?q?=E4=BF=AE=E6=94=B9?=
MIME-Version: 1.0
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---
 library/think/db/driver/Mysql.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/library/think/db/driver/Mysql.php b/library/think/db/driver/Mysql.php
index a9891df6..1c48278c 100644
--- a/library/think/db/driver/Mysql.php
+++ b/library/think/db/driver/Mysql.php
@@ -103,7 +103,7 @@ class Mysql extends Driver
             list($field, $name) = explode($key, '$.');
             $key                = 'jsn_extract(' . $field . ', \'$.\'.' . $name . ')';
         }
-        if ($key && !preg_match('/[,\'\"\*\(\)`.\s]/', $key)) {
+        if (!preg_match('/[,\'\"\*\(\)`.\s]/', $key)) {
             $key = '`' . $key . '`';
         }
         return $key;